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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
6.5 PRC Ballistics - drops don’t match ballistics chart
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<blockquote data-quote="WiscGunner" data-source="post: 1744275" data-attributes="member: 97288"><p>zero changes as well as velocity changes from different positions. Cheek position, eye box and length of pull change in different positions. These are "facts" because of the thousands of variables at play. The POA of the rifle does mot change but reverb from a bench if different than reverb from a bipod in sand which is different than a bipod on concrete which if different.... The recoil impulse (thus velocity) is different standing vs sitting, vs prone vs shooting with your back in a tree. There simply are too many points where the physics involved change for anyone to say a rifle zero'd is a rifle zero'd. Our goal as a shooter is to compensate for these changes and shoot differently from each position so that each position behaves the same. To think otherwise is foolish ignorance. This is why shooters in PRS are moving to light recoiling rifles, heavier systems and poorer fundamentals...simply reduces the variable to free recoil the rifle. Hiding the physics involved with bigger targets or lighter recoil doesn't change the fact that they are there. This is easily tested and most people do to some extent so that we can adjust for the results. </p><p></p><p>now if you are free recoiling off a bench with slick bags and free recoiling in pro e off the same bags then the position of the rifle hasn't changed, the relationship of the shooter hasn't changed, and the relationship to the support surface hasn't changed so the POI won't change. This however is not practical in a stretch of the term. </p><p></p><p>Perhaps you could try not to be so argumentative and try to answer the OP's question with helpful science and not just some vague buzzword like "fundamentals" as if saying the word implies you have mastered all its vast encompassing knowledge. </p><p></p><p>There has been great suggesting addressing the dozens of holes in the OP question due to lack of information. Sadly, we all need more details from the shooter to provide relevant information to help. As it stands we are all just guessing at the infinite possibilities without more detail.</p></blockquote><p></p>
[QUOTE="WiscGunner, post: 1744275, member: 97288"] zero changes as well as velocity changes from different positions. Cheek position, eye box and length of pull change in different positions. These are “facts” because of the thousands of variables at play. The POA of the rifle does mot change but reverb from a bench if different than reverb from a bipod in sand which is different than a bipod on concrete which if different.... The recoil impulse (thus velocity) is different standing vs sitting, vs prone vs shooting with your back in a tree. There simply are too many points where the physics involved change for anyone to say a rifle zero’d is a rifle zero’d. Our goal as a shooter is to compensate for these changes and shoot differently from each position so that each position behaves the same. To think otherwise is foolish ignorance. This is why shooters in PRS are moving to light recoiling rifles, heavier systems and poorer fundamentals...simply reduces the variable to free recoil the rifle. Hiding the physics involved with bigger targets or lighter recoil doesn’t change the fact that they are there. This is easily tested and most people do to some extent so that we can adjust for the results. now if you are free recoiling off a bench with slick bags and free recoiling in pro e off the same bags then the position of the rifle hasn’t changed, the relationship of the shooter hasn’t changed, and the relationship to the support surface hasn’t changed so the POI won’t change. This however is not practical in a stretch of the term. Perhaps you could try not to be so argumentative and try to answer the OP’s question with helpful science and not just some vague buzzword like “fundamentals” as if saying the word implies you have mastered all its vast encompassing knowledge. There has been great suggesting addressing the dozens of holes in the OP question due to lack of information. Sadly, we all need more details from the shooter to provide relevant information to help. As it stands we are all just guessing at the infinite possibilities without more detail. [/QUOTE]
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6.5 PRC Ballistics - drops don’t match ballistics chart
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