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Do Bullets Go To Sleep?
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<blockquote data-quote="ajhardle" data-source="post: 835882" data-attributes="member: 49861"><p>So, what can the regular old redneck with a gun like me take from your article?</p><p></p><p>Well.....I have typically placed a chrono 15ft from the muzzle and used a B. Litz provided B.C. and the provided correction from the ballistic calculator results in a shot hitting low, at extreme ranges, approaching the sonic barrier. If assumed my bullets were yawing, even though I couldn't tell from round holes in the paper.</p><p></p><p>What I've learned: if I were shooting a .215 g7 B.C. @2600fps, but it had a significant wobble for the first 100 yards, let's say it averaged 10% more drag, (just a convenient number) it would lose velocitylikebullet with a bullet with a .194 B.C. The difference would be that at 100 yards, the bullet would be traveling 2373 fps, not the predicted 2395. What difference is that? That's 10"at 1000 yards at sea level. If I correct my muzzle velocity to 2577, I can correct for the lost velocity.</p><p></p><p>So what does a shooter do with this knowledge?</p><p></p><p>I think it's worth while to record velocity beyond 100 yards to use in a ballistic calculation. That's what I will do from now on, unless you have better suggestion....</p></blockquote><p></p>
[QUOTE="ajhardle, post: 835882, member: 49861"] So, what can the regular old redneck with a gun like me take from your article? Well.....I have typically placed a chrono 15ft from the muzzle and used a B. Litz provided B.C. and the provided correction from the ballistic calculator results in a shot hitting low, at extreme ranges, approaching the sonic barrier. If assumed my bullets were yawing, even though I couldn't tell from round holes in the paper. What I've learned: if I were shooting a .215 g7 B.C. @2600fps, but it had a significant wobble for the first 100 yards, let's say it averaged 10% more drag, (just a convenient number) it would lose velocitylikebullet with a bullet with a .194 B.C. The difference would be that at 100 yards, the bullet would be traveling 2373 fps, not the predicted 2395. What difference is that? That's 10"at 1000 yards at sea level. If I correct my muzzle velocity to 2577, I can correct for the lost velocity. So what does a shooter do with this knowledge? I think it's worth while to record velocity beyond 100 yards to use in a ballistic calculation. That's what I will do from now on, unless you have better suggestion.... [/QUOTE]
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Do Bullets Go To Sleep?
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