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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Problem with calcs for 4dof and strelok
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<blockquote data-quote="jdavistx" data-source="post: 1958864" data-attributes="member: 89418"><p>As did I. Then I went back to basics. We're dealing with roughly a 5.6 MOA miss @ 900 yards (17.93 MOA calculated vs 12.35 actual - That's about 50" @900 yards.) AB Analytics calculates about 18 MOA based on the available data provided, which is consistent with other inputs. I am also reminded the system shoots 0.3 MOA which translates to 2.8" @900 yards all other things being equal?. What could cause such a massive miss? </p><p></p><p>It would take really bad data entered into the software (but it's been verified by others here) so it must be something else - mechanical? My hat's off to the guys who suggested looking at the scope. How the scope tracks or my question: If SFP is being used correctly. It's all I can think of. The former would explain it, but a rare occurrence, just like SFP. If it is scope tracking, Vortex should and will replace as it sounds like a recent purchase given their warranty.</p><p></p><p>SPF an interesting question to me as it messed me up, but by no means the correct answer. </p><p></p><p>Once elevation is solved, then move on to windage. A 1.25 MOA actual is 11.8," while shooting at a 12" plate @900 yards. If the numbers are incorrect (especially wind), it's a miss.</p></blockquote><p></p>
[QUOTE="jdavistx, post: 1958864, member: 89418"] As did I. Then I went back to basics. We're dealing with roughly a 5.6 MOA miss @ 900 yards (17.93 MOA calculated vs 12.35 actual - That's about 50" @900 yards.) AB Analytics calculates about 18 MOA based on the available data provided, which is consistent with other inputs. I am also reminded the system shoots 0.3 MOA which translates to 2.8" @900 yards all other things being equal?. What could cause such a massive miss? It would take really bad data entered into the software (but it's been verified by others here) so it must be something else - mechanical? My hat's off to the guys who suggested looking at the scope. How the scope tracks or my question: If SFP is being used correctly. It's all I can think of. The former would explain it, but a rare occurrence, just like SFP. If it is scope tracking, Vortex should and will replace as it sounds like a recent purchase given their warranty. SPF an interesting question to me as it messed me up, but by no means the correct answer. Once elevation is solved, then move on to windage. A 1.25 MOA actual is 11.8," while shooting at a 12" plate @900 yards. If the numbers are incorrect (especially wind), it's a miss. [/QUOTE]
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Problem with calcs for 4dof and strelok
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