Velocity is heavily determined by the length of the AR-15s barrel. involving more than 6,000 rounds fired, as well as a comparison of the performance differences Ballistic coefficients are only one factor in bullet selection for different kinds of shooting. Small question : why does the lines of the curves not exactly match with the zero distance ? Yes. The app allows the shooter to select from a large library of bullets. 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. This is a general information calculator and there may be additional parameters that can . Modern computers have rendered them unnecessary, but they work quite well. Parabns!!! Reloading data is available as low as 99 per cartridge or purchase a subscription and receive new data . The 350 Legend is a relatively new rifle cartridge that caught on very quickly, being chambered in numerous different rifles from several manufacturers. Below weve included a chart so that you can have a rough idea of your AR-15s velocity based on its barrel length: Most of the time, a guns barrel length will be marked when you purchase it. [ARCHIVED THREAD] - Best Ballistic calulator that takes twist and barrel length into the math? The good news is that the cost of a smartphone-based ballistic calculator ranges from free to $29.99. Theres never been a muzzleloading system like this. A whole new world of hunting and target-shooting options open with that difference, a fact sometimes obscured by the cartridge's subsonic and military roots. data is provided purely for entertainment purposes - to better facilitate arguments As the successor to the 50-70, the 45-70's narrower bullet offered increased range, superior penetration, and heightened accuracy. How you use the data is entirely Plus you can save favorites, add notes and more. Theres not really a wrong answer here. Additionally, some ballistics data is from taken from the data gathered by Bryan Litz of Applied Ballistics, LLC. The projectile sits atop the fuel source and seals one end of the case. were either familiar with, or because they were what was available, and mentioning I am a serving member and this helped me a lot with some discussions at work (we use a carbine vs the full length steyr). I didnt even notice that when I first wrote this up. This is a good guide for both short range and long range bullets. He's a lifelong learner, passionate outdoorsman, and steadfast supporter of firearms culture. A 14.5" barrel would give you much less velocity than a 20" barrel, hence the problems with lethality in M855 ammo and subsequent development of the 6.8 SPC Barrel length and twist should be factored in using your muzzle velocity - Which also includes things like your actual barrel diameter. He's a former military officer turned professional tech sector trainer. It depends not only on barrel length but other factors as well. NOTE: JBM will not guarantee these calculations for ANY purpose. Excellent post! Another load only showed an increase of 262 fps 20.15 fps per barrel-inch which is well below the 487 fps average. From them, the 6.5 Grendel 16 size may be the best choice for this scope. The ammunition used for this test is of several types, all of which are of corresponding lot numbers. Most of the BC data comes straight from the manufacturer's websites and publications. CPRN: CCI 32 gr. The results are shown as a range based on the standard deviation of assumed independent measurements for the factory ammunition. You will receive an email every Friday morning featuring the latest chatter from the hottest topics, breaking news surrounding legislation, as well as exclusive deals only available to ARFCOM email subscribers. Thanks very much for reading our guide to AR velocity and barrel length. From hunters and military members, to competition shooters and general firearm enthusiasts, we welcome anyone who values and respects the way of the firearm. To that point, remember that I didnt consider the bullets energy in any of these charts or graphs. Hey Jon, by popular request it seems like a 308 version is in order. // ]]> //

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