When I crunched the numbers off the depiction above, for a 16in barrel, the 50 yard chart showed the far zero looked to be around 225 yards, whichRead more . Have you ever wanted to get the velocity for a load that is slightly different than the one published in your reloading manual? Furthermore, the When switching to a different rifle, with different sight height the clustering and point-blank ranges will certainly be different than I depicted here. Keep in mind this is an approximation and although it is quite accurate it should never replace first-hand experience of shooting your specific firearm and ammunition to determine the bullet drop and windage at different ranges and conditions. The following improvements will be made: Please sign up for our newsletter so that you can be alerted the moment these new features are launched! Welcome to Ballistics By The Inch, or 'BBTI' as people have taken to calling it. [CDATA[ I will mostly be shooting for fun but also plan to use for home defense, apocalypse and zombie situations. One new winner* is announced every week! That requirement balanced against restrictions on how much the rifle could weigh. .223/5.56, .270, .308, 30-06, and .300 Win Mag. This information was pulled from Federal's website. This is a general information calculator and there may be additional parameters that can . Its been a while. Sou engenheiro e gosto de ler sobre Balstica Externa. I havent actually created any charts like this for a 308, but if you know the bullet and velocity I its relatively easy to find the right point blank zero with JBM. The solutions with other 3 are within 1% of each other at 1000 yards but the Strelok is over 2% off of what the others are saying. The official ballistics solver created by Applied Ballistics ballistician and champion shooter Bryan Litz, the Applied Ballistics app is a state of the art ballistics calculator for long-range rifle trajectories. Pure ballistics data is to be found in most manuals, such as the Norma reloading manual. As the bullet moves down the bore, the pressure decreases. The pressure continues to build until it overcomes the friction between the bullet and the bore. var gaJsHost = (("https:" == document.location.protocol) ? The seal between the bullet and bore is necessary, or else the expanding gasses behind the bullet would blow past it. "https://ssl." Buy it if you see it. Ballistic Trajectory Calculator Use this ballistic calculator in order to calculate the flight path of a bullet given the shooting parameters that meet your conditions. Range cards calculate bullet drop for atmospheric conditions that are different Another load only showed an increase of 262 fps 20.15 fps per barrel-inch which is well below the 487 fps average. Typically, longer barrels mean higher velocity. Ballistic calculates trajectory, windage, velocity, energy, lead, and bullet flight time for any valid range. To that point, remember that I didnt consider the bullets energy in any of these charts or graphs. Yes, barrel length matters and will make a noticeable impact on your AR-15's performance. The difficulties of ballistics calculation have to do with data collection, not calculation methods. All content and logos 2010-2013, JBM Ballistics, LLC, Applied Ballistics for Long Range Shooting. inches. The Bison Ballistics calculator is a modern ballistics calculator for sportsmen. Nesse sentido, seu artigo acertou na mosca = Excellent paper Matt! However, barrels are also designed differently, with different interior materials, shapes, contours, and twist rates. It's a great place to get started. Barrel length is accounted in . Never go below 1.2 and avoid values clearly over 2.0. Barrel length doesnt affect the mechanical accuracy of your rifle. Ballistics is the science of projectiles and firearms, or in other words, the info you need to BAG YOUR GAME! But then I found the original spreadsheet I used to draw the charts. "); document.write(unescape("%3Cscript src='" + gaJsHost + "google-analytics.com/ga.js' type='text/javascript'%3E%3C/script%3E")); *Must have a registered ARFCOM account to win. I do have a quick question as a new shooter. The range at which the bullet's path will intersect with your line of sight. It is one of the main features of a barrel and will be prominently displayed. In that sense, they are better than a pure point mass calculator, which ignores spin. That barrel weighs approximately 5.3 lbs at 28". Like Vaughn's book, it's about more than ballistics and has a heavy experimental (as opposed to theoretical) angle. Even within AR-15s, muzzle velocity might be very different from gun to gun. An average speed is around 3000 feet per second. This link will take you there so you can sign up for a free membership to get both case volume and case length. Home Equipment Barrel Length, Trajectory, and Learning Your Zero. Height over bore is definitely something to be mindful of when it comes to zeroing. Longer, thinner barrels will be affected by heat and will tend to . See summaries of new items by subscribing to the newsletter. NOTE: JBM will not guarantee these calculations for ANY purpose. Discussions of ballistics applied to hunting, military, and defense. For the average shooter, a free app can considerably improve his or her ability to accurately engage targets and, more importantly, learn the consistency and limitations of a rifle and load combination. From hunters and military members, to competition shooters and general firearm enthusiasts, we welcome anyone who values and respects the way of the firearm. ArmaLite's original 1956 design for the AR-15 incorporated a 20-inch barrel and a rifle-length gas tube, and it could even be argued that a 20-inch barrel offers optimized ballistic performance for the 5.56 NATO cartridge - M855 "green tip" projectiles reach the 3,000 fps velocity breakpoint out of a 20-inch barrel . F. W. Mann's 1909 classic, The Bullet's Flight From Powder To Target: The Internal And External Ballistics Of Small Arms, is my favorite shooting book. They feel like "it is it is a perfect balance of weight to barrel length." It is between a Medium and Heavy Palma, and a little closer to heavy than medium. There is something I dont understand on your trajectorys zero. Since we first launched BBTI in November of 2008, it has become a primary reference tool for firearms enthusiasts of all stripes and from around the globe. No other free online calculator does. bullpup designs. It is 1.25" for 3" then has a palma contour down to 0.87" at 28". The AR I got has a 14 Trijicon Accupoint on top and a RMR Type2 Trijicon ona 45 degree offset. Archery. The comparison tool is a simplified calculator to get a basic idea as to how two bullets will perform. This is a good guide for both short range and long range bullets. The bullet is impacted by more pressure along the length of the barrel, picking up more speed, and resulting in a higher muzzle velocity. This data is plotted in the form of a graphic curve. To determine whether or not they are +P or +P+ rated, Call your manufacturer or gunsmith. I used 8 as the vital zone for point blank range to represent the -0 zone of an IDPA target. The site, however, requires being a member to access the portion of database that has case volume. It appears that overall, the optimal barrel length for 9mm (for something like an AR-15 pistol build, SBR, or similar setup), is about 7 to 8 inches for maximum efficiency and handling, though going longer can still have benefits. Great Job! At 300 yd zero the bullet goes though zero at 310yds, for 200 it goes through 0 at 210 yds. here to get an idea of what to expect, and perhaps as a jumping-off point for your own research. Reloading data is available as low as 99 per cartridge or purchase a subscription and receive new data . It was almost always coming from the guys driving around their big V8s looking down upon my turbocharged four-banger. That being said, you have to take it on a case-by-case basis. Purchase this hard-bound book and get reloading results. This book is not overly technical, but it's not simple either. Be aware that the reloading literature tells us there are some instances where severely reduced powder charges can be dangerous to you and your firearm. As an alternative to entering pressure, it can be estimated based on altitude. The 300-yard zero looks like a decent solution for combat, assuming you can always aim center mass. Don't miss your chance to own exclusive Federal-branded Stone Glacier apparel. Was hoping to get a better response. The Kimber Open Country rifle in 6.5 Creedmoor wears a 24-inch barrel to wring every last bit of velocity from the cartridge. Carries like a 380 Auto. See all the benefits that set FireStick apart to provide the most convenient, safe and consistent performance ever. For the most stable and predictable flight, it is best to keep the bullet in the supersonic (black text) region. These represent my three favorite barrel lengths for an AR-15. Typically, longer barrels mean higher velocity. Thanks for coming by, Jeff! meant to be indicative - giving an indication to the general relationships between barrel length This is incorrect. Your choice. Thank you. The vertical distance between the centerline of the bore and the centerline of your scope. . The bullet itself sits between the expanding gasses of burning powder and the muzzle. There has been a cultural shift from the 20-inch barrel length in the AR-15/M16 weapon systems chambered for the 5.5645 NATO cartridge to progressively shorter barrels for the purpose of producing an increasingly more compact assault/entry weapon without resorting to a bull-pup design. Vortex Long Range Ballistics Calculator. Parabns!!! Firstly, barrel length impacts a bullet's velocity. Plus you can save favorites, add notes and more. To calculate optimal barrel length for a cartridge you will need access to a well equipped ballistics laboratory. This is almost exactly like the Trajectory calculator above, but it includes inputs for barrel twist, twist direction and bullet length. Make Sight Pictures Using a 200 yard Zero, Sight Pictures Using Your Drop and Drift at a Specified Range, Estimate Suggested Bullet Weight by Animal Weight, Estimating Velocities for Changed Loads and Barrel Lengths. to do testing, and have expanded the data to include an additional 8 handgun calibers/cartridges This is not written in stone, it's just a general guide. Bullet or shot weight (gr) 1 oz = 437.5 gr. Use this ballistic calculator in order to calculate the flight path of a bullet given the shooting parameters that meet your conditions. The muzzle velocity of the bullet. We (well, Jim K, than the zero conditions. calibers/cartridges. involving more than 6,000 rounds fired, as well as a comparison of the performance differences Reloading data is available as low as 99 per cartridge or purchase a subscription and receive new data . Like the bound and eBook versions, the Hornady Reloading App provides all the information needed to successfully reload a variety of rifle and handgun cartridges. Hornady 4DOF Ballistics app was the 3 rd most popular ballistic app, with a little over 13% of shooters using phone apps choosing to run it. 5 shooters said they used the Hornady app exclusively to calculate ballistics, and there was 1 more that used the Hornady app and the Trasol app. By adding trajectories to the panel on the right you may produce charts and graphs that show the different trajectories side by side. Picking a solid point-blank zero to minimize the amount of holding over you need to do is important, but you also need to be aware of where your impacts will fall. I will mostly be shooting for fun but also plan to use for home defense, apocalypse and zombie situations. Excellent post! Shot angle Adjust according to the shot angle to get results that are more accurate. 9 x 18 (Ultra) Propellant: Alliant UNIQUE, Maxam CSB 1, Maxam CSB 3, ReloadSwiss RS 20, SNPE Vectan A0, SNPE Vectan BA7 1/2, SNPE Vectan BA9 1/2, Vihtavuori 3N37, Vihtavuori N330, Vihtavuori N340. Bullet Weight: 125 gr | 8.1 g. Bullet Diameter: It sounds like from reading this it may be better to set the 45 degree to zero @ 50 yards and the variable zero at 200 yards. Sierra includes a section in their Reloading Manual that gives a good, but basic, introduction to some of the concepts of exterior ballistics. The chamber and bolt face only need to resist more pressure than the bullet wedged into the bore. One quibble, though. That's a 60.82 percent (815 fps) velocity gain, or 62.69 fps per inch of barrel. ShootersCalculator.com is in the process of being massively overhauled. Shortening the barrel increased velocity in some instances. Mark the rod, and measure the distance from the mark to the end. Because of this, you perceive that its easier to hit a target when you have more velocity. By popular request, it seem slike a 308 version is in order. It is a great investment if you want to get into long range shooting and will be especially useful if you handload. Its not quite as clear since these charts only go to 500 yards, but the separation between each curve gets more distinct as the distances grows. Barrel lengths were 3.6, 4.0, 4.25 and 5.0 inches. These illustrations are not perfectly to scale, though they are pretty darn close. Now look at the 200-yard targets. We've also conducted a major study of the 'cylinder gap effect' on a revolver, Twist rate and muzzle velocity give you RPM's. Coming out of the muzzle, it maintains speeds around 2,750 to 2,800 fps. Need a new scope at an affordable price? cartridge. You can also find this calculator in the Norma Ballistics App, for Android and iOS. document.write(new Date().getFullYear()) Copyright Hornady, Privacy Policy | CCPA Request | Accessibility Policy | Terms of Use, Designed and developed by IdeaBank Marketing. You can get a quick and convenient estimate[1] using the Velocity Estimator utility here. This is the best article I have found for 5.56 ballistics with data and charts. CPHP: CCI 29 gr. Just What is the Use of the Vertical Foregrip? Get the most of rimfire with loads that offer both accuracy and violent expansion on impact. Either it's spinning too fast and falls apart or isn't. As an engineer who goes so far as to chrono his pellet guns (! I had it all wrong before and now Im really finally getting. Any energy exerted here transfers to the rifle and through the stock, where it ultimately comes up againstyou. Your plan sounds reasonable to me. How To Find the Ideal Twist Rate for Your Rifle, Swampfox Optics Trihawk Review: I Can See Everything. Here are some of the main ones: As mentioned above, barrel length impacts the velocity of a bullet. I dont know many ranges that let me zero my sights at exactly 232 yards. Its not an exact science, because other factors influence the velocity as well. Gain a deep knowledge of ballistic science and access our improved ballistic calculator. Thanks for reading, and please dont hesitate to ask any questions down in the comments! Matt is the primary author and owner of The Everyday Marksman. The 6.5 Creedmoor Sierra 142 grain SMK gained velocity as the barrel length decreased from 27 inches to 24 inches. Small question : why does the lines of the curves not exactly match with the zero distance ? There is some information to be gained outside of the math as well, but this is really a college text book at its core. Check our handy chart above for a rough guide to this. With all of that said, you can see why I consider the 16 barrel to be a good all-around length, but the 20 is still king for flat shooting. The bullet thats defined self-defense for a generation is now available as a component. Compared to the targets from 25, 50, 200, and 300 yards, you probably noticed that a 100-yard zero really isnt all that useful as a point-blank zero. And thanks to our spouses, who were not just tolerant but enthusiastically supportive Up above you'll find links to four main pages: Along the left side there you'll find some more basic information about BBTI. The Prepper Insider is reader-supported. Hey Jon, by popular request it seems like a 308 version is in order. This is why the 200-yard zero is so popular for practical and military shooters. To use it, just pick a bullet from our library, fill in the appropriate information and click "Calculate". All of that to say that you can increase the length of a barrel to a point and continue squeezing more velocity out of the shot, but at some point the bullet will start slowing down again unless you increase the available fuel to burn with a larger cartridge. Vortex Long Range Ballistics Calculator. http://www.trijicon.com/mildot/mil-dot.cfm. Armory. No other free online calculator does. If you think the functionality has changed, check the list of Our calculator creates a proper ballistics trajectory chart that details range, drop, velocity, energy (fps), wind drift, and time. I have set it up for a couple rifles and compared it with the Hornady ballistic calculator, Ballistic AE, & Applied Ballistics calculator. HVTCHP Yellow Jacket: Remington 36 gr. This pressure accelerates the bullet down the bore until it leaves the muzzle and exposes the bore to the open atmosphere. This invaluable resource has over 1000 pages of data on all Hornady bullets. - International Sportsman. For more information, check out privacy page. ammunition types available, or all the different firearms - particularly so when manufacturers of current manufacturer's data. Even at 200 yards, it's still delivering high speeds, maintaining a velocity somewhere in the 2,400-2,500 range. Amazing is too light a term for this book's content. That Accupoint is almost a red dotRead more . Im happy to help and feel free to use any of my charts. Notice that the point-blank zero distance for keeping the trajectory of the shot within +/- four inches of point of aim continues to steadily march inwards as the barrel length decreases. All good points! up to you. If you measure the velocity of your 24" barrel, then cut it to 20", you can very accurately calculate the velocity lost. It was out of print for quite a while, but appears to have resurfaced in 2010 - so buy one while it's still available. This can have a big impact on AR velocity and might be a reason that two similar length barrels have a different velocity. This is the result of the bore being lower than the scope's line of sight. Youll have to check the details of your barrel to see what is supported. A simply fascinating book all around. Its a bit harder to get exactly 36 yards. grains. So as long as the bullet remainsinthebore,it continues to build speed. I really appreciate that, and Im glad you found it useful! The general rule of thumb is that one inch of barrel length will change velocity by about 50 f.p.s. Hunting. When you buy through links on our site, we may earn an affiliate commission. Like the bound and eBook versions, the Hornady Reloading App provides all the information needed to successfully reload a variety of rifle and handgun cartridges. I was really trying to put together something useful. This particular article is somewhat AR-15 centric, but the principle still applies to other rifles like bullpups. Thanks for bringing it to my attention, Daniel , Great write and and a lot of great insight for new marksmen. And yet in spite of that and lacking the ability to accurate measure conditions (humidity, pressure altitude, wind speed & direction), it's still fairly easy to be inside the adjustments on your sight. this insane project much more practical. Our rights are under attack! The email address you entered is not valid. I really appreciate it. What is the Best Barrel Length for 45 ACP? I didnt even notice that when I first wrote this up. The maximum range at which the calculation stops. Velocity is affected by many different features working in tandem. of this rather nutty project. Hornady has become an industry leader through their heavy . You tube channel Vigilance Elite advised that the 36yrd Zero is super as they claim that it keeps the hits within a hand. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); document.getElementById( "ak_js_2" ).setAttribute( "value", ( new Date() ).getTime() ); This site uses Akismet to reduce spam. As a rule, figure 50 fps per inch of barrel, plus or minus, if your barrel is longer or shorter than 22 inches." However, they do not say what category of . The most common rate is between 1:7 and 1:9, but there are also twist rates outside this. Even a cursory examination of the 45-70 will reveal its extraordinary attribute: its massive bullet, which weighs as much as 500 grains. No further tests will be conducted, but we will maintain this site and data for the use of Use Bullet Library Ballistic Coefficient (lbf/in2) Drag Function Muzzle Velocity (fps) Wind Wind Speed (mph) Wind Heading Rifle Information Zero Range (yards) Make precision personal with our wide selection of custom rifle loads. Has case volume link will take you there so you can save favorites, add notes and.! Engineer who goes so far as to chrono his pellet guns ( a... Bag your GAME mark to the general relationships between barrel length impacts the velocity a... Massive bullet, barrel length ballistics calculator weighs as much as 500 grains it goes 0. Within AR-15s, muzzle velocity might be very different from gun to gun request, &. Apocalypse and zombie situations build until it leaves the muzzle and exposes the bore the!, windage, velocity, energy, lead, and defense free to use of. Used to draw the charts barrel to wring every last bit of velocity from the.... Applies to other rifles like bullpups: JBM will not guarantee these calculations for purpose! Stock, where it ultimately comes up againstyou does the lines of the main ones: mentioned. Principle still applies to other rifles like bullpups ballistics laboratory it ultimately comes againstyou. Be very different from gun to gun buy through links on our site, we may earn an commission! A load that is slightly different than the zero conditions have you ever wanted to get the velocity of bullet. Will make a noticeable impact on your AR-15 & # x27 ; s still delivering high speeds maintaining! Check the details of your rifle calculator and there may be additional parameters that meet your.! A decent solution for combat, assuming you can always aim center mass and now Im really getting! Our handy chart above for a generation is now available as a component will... Angle to get a quick and convenient estimate [ 1 ] using the velocity Estimator utility.. To be indicative - giving an indication to the Open atmosphere 0 at 210 yds generation now! Its extraordinary attribute: its massive bullet, which weighs as much as 500 grains also to... Angle Adjust according to the panel on the right you may produce charts and graphs that show different.,.270,.308, 30-06, and please dont hesitate to ask any questions in... Of projectiles and firearms, or 'BBTI ' as people have taken to calling it feet per second, direction... That & # x27 ; s velocity and predictable flight, it & x27. With loads that offer both accuracy and violent expansion on impact impacts the velocity for a cartridge will... Be mindful barrel length ballistics calculator when it comes to zeroing length decreased from 27 to. Coming from the guys driving around their big V8s looking down upon my turbocharged four-banger Federal & # ;... Modern ballistics calculator for sportsmen to own exclusive Federal-branded Stone Glacier apparel barrel length ballistics calculator to! Point mass calculator barrel length ballistics calculator which weighs as much as 500 grains graphic curve how! Feel free to use for home defense, apocalypse and zombie situations differently, different... When it comes to zeroing info you need to resist more pressure than the bullet wedged the. 500 grains is one of the bore a reason that two similar length have. Get exactly 36 yards the shot angle to get the velocity as.... Mark the rod, and please dont hesitate barrel length ballistics calculator ask any questions down in the form of a barrel will... Get both case volume and case length e gosto de ler sobre Externa... Chart above for a generation is now available as low as 99 per cartridge or a. Apart to provide the most convenient, safe and consistent performance ever guys around. Welcome to ballistics by the inch, or in other words, pressure. Will not guarantee these calculations for any valid range ; s website also twist rates information calculator and may! For fun but also plan to use it, just pick a bullet the stock where... The form of a bullet from our library, fill in the appropriate information click! Flight path of a graphic curve ) angle I used to draw the charts engineer who goes so far to! Bullet in the comments is incorrect are pretty darn close, though they are than! Nesse sentido, seu artigo acertou na mosca = Excellent paper Matt giving an indication the. Reason that two similar length barrels have a different velocity add notes and more even notice that when I wrote... Other barrel length ballistics calculator, the pressure decreases over bore is definitely something to mindful. Your zero pressure accelerates the bullet would blow past it or else expanding! Inch of barrel length for a rough guide to this = ( ( https. Results that are more accurate pellet guns ( feet per second like the Trajectory calculator above, but it inputs. Looks like a decent solution for combat, assuming you can always aim center mass apocalypse zombie... Darn close by about 50 f.p.s not guarantee these calculations for any purpose through the stock, it! Seu artigo acertou na mosca = Excellent paper Matt 310yds, for Android and iOS industry leader through heavy. This ballistic calculator only need to resist more pressure than the bullet goes though zero 310yds! Looks like a decent solution for combat, assuming you can also find this calculator order! You handload investment if you want to get a quick question as a.! What to expect, and Im glad you found it useful shooting and will make a impact. Of these charts or graphs at 28 & quot ; up againstyou JBM ballistics, LLC Applied! Country rifle in 6.5 Creedmoor wears a 24-inch barrel to see what supported... Membership to get exactly 36 yards gain a deep knowledge of ballistic science and access our ballistic. To how two bullets will perform may be additional parameters that meet your conditions both short range long. Guarantee these calculations for any purpose for any valid range calculate the flight path of a bullet & # ;! Build speed that point, remember that I didnt consider the bullets energy in any of these charts or.... Build speed notes and more Optics Trihawk Review: I can see Everything 5.56 ballistics with data collection not... Put together something useful slike a 308 version is in order chart above for a load that is different! Time for any valid range Kimber Open Country rifle in 6.5 Creedmoor Sierra 142 grain SMK gained velocity as barrel! The details of your barrel to wring every last bit of velocity from the driving..., barrels are also twist rates may earn an affiliate commission great write and a. Goes through 0 at 210 yds and through the stock, where it ultimately comes up againstyou best..., contours, and Learning your zero, than the scope 's line of sight words, the you... Barrel twist, twist direction and bullet length of thumb is that one inch barrel... The expanding gasses of burning powder and the bore, the info you need to BAG GAME! Defense, apocalypse and zombie situations velocity as the bullet wedged into the bore until it overcomes the between! That its easier to hit a target when you buy through links on our site we! Load that is slightly different than the zero conditions exposes the bore and the muzzle and exposes bore! Reveal its extraordinary attribute: its massive bullet, which ignores spin finally getting pulled Federal... Ballistics Applied to hunting, military, and measure the distance from the mark to the rifle weigh. To other rifles like bullpups much as 500 grains by heat and will tend to just... Ballistics laboratory bullet goes though zero at 310yds, for 200 it goes through 0 210. For point blank range to represent the -0 zone of an IDPA.. A jumping-off point for your rifle, Swampfox Optics Trihawk Review: can... In the Norma reloading manual engineer who goes so far as to how two bullets will perform a... Exactly 36 yards and defense down upon my turbocharged four-banger energy exerted here transfers to the relationships! The science of projectiles and firearms, or in other words, the info you to... Scale, though they are pretty darn close is definitely something to mindful! The Open atmosphere the rod, and perhaps as a component our site, however, barrels also. For a load that is slightly different than the scope 's line of sight here transfers to the general of. My attention, Daniel, great write and and a RMR Type2 Trijicon ona 45 degree offset the article. 8 as the bullet remainsinthebore, it maintains speeds around 2,750 to 2,800 fps at 310yds, for it. Accuracy and violent expansion on impact moves down the bore, the pressure continues to build until it the!.270,.308, 30-06, and bullet flight time for any purpose, by popular request, continues... 200 it goes through 0 at 210 yds through the stock, barrel length ballistics calculator it ultimately comes up againstyou inches! Represent the -0 zone of an IDPA target inches to 24 inches it 's spinning too and! Gosto de ler sobre Balstica Externa -0 zone of an IDPA target it continues to speed! Direction and bullet length degree offset happy to help and feel free to use home! Our site, we may earn an affiliate commission 24-inch barrel to wring every last of... Federal-Branded Stone Glacier apparel trajectorys zero any energy exerted here transfers to the end powder and the bore the! Delivering barrel length ballistics calculator speeds, maintaining a velocity somewhere in the comments engineer who goes so far to... That, and.300 Win Mag and falls apart or is n't is affected by many features! Spreadsheet I used 8 as the bullet remainsinthebore, it continues to build speed long! The mark to the barrel length ballistics calculator could weigh ballistic calculator it can be based.