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Rifles, Reloading, Optics, Equipment
Reloading
Can a shooter's mechanics and form influence velocity E.S.?
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<blockquote data-quote="DMP25-06" data-source="post: 1676592" data-attributes="member: 27271"><p>Can a shooter's mechanics and form , when shooting , have a direct effect on the velocity of the bullet leaving the muzzle ?</p><p>The reason that I ask is that I can not seem to produce reloaded ammo that has a low extreme spread of velocity , even though I weight-sort my brass to less than +- .5 grains , bullets sorted to .1 grain , weigh all powder charges to exactly equal weights with a balance beam scale , cut brass to equal length , anneal after 3 firings , use Redding Competition full-length neck bushing die set , and micrometer seating die , and check bullet run-out on all loaded cartridges . I use a Magnetospeed chronograph for reading velocity .</p><p></p><p>My shooting routine is as follows :</p><p>From a concrete bench , I use a Caldwell heavy front rest and a leather rabbit-ear bag for the rear rest , and position my rifle exactly the same for each shot .</p><p>Shot #1 , I pull the rifle in tight to my shoulder , concentrate on a good , smooth trigger squeeze , and make certain that I am centered on target and send it .</p><p>Provided that I am on target as I should be , </p><p>Shots # 2, 3, 4 , I will usually relax somewhat and shoot those 3 shots which will usually be touching each other , but not touching #1 .</p><p>Shot #5 , I find myself relaxing even more , trying to send it through the same hole as the cluster of #2-3-4 , and almost always it will be not touching the others .</p><p>Velocities will show #1 as the fastest , #2 ,3, 4 will be nearly the same velocity as each other , and #5 will be slower than all others , sometimes as much as 50 FPS slower than #1 , and 20+ FPS slower than #2,3,4 shots . </p><p>Is the fact that I am unconsciously relaxing , thereby offering less resistance to the recoil , possibly causing the difference in velocity , causing wider extreme spreads ?</p><p></p><p>The laws of physics state that "For every action , there is an equal and opposite reaction".</p><p>So , if I hold the rifle tight to my shoulder , bracing against the recoil , will the bullet's velocity be faster than those shots that I relax letting the rifle free-recoil against less resistance ?</p><p></p><p>Thank You All , </p><p>DMP25-06</p></blockquote><p></p>
[QUOTE="DMP25-06, post: 1676592, member: 27271"] Can a shooter's mechanics and form , when shooting , have a direct effect on the velocity of the bullet leaving the muzzle ? The reason that I ask is that I can not seem to produce reloaded ammo that has a low extreme spread of velocity , even though I weight-sort my brass to less than +- .5 grains , bullets sorted to .1 grain , weigh all powder charges to exactly equal weights with a balance beam scale , cut brass to equal length , anneal after 3 firings , use Redding Competition full-length neck bushing die set , and micrometer seating die , and check bullet run-out on all loaded cartridges . I use a Magnetospeed chronograph for reading velocity . My shooting routine is as follows : From a concrete bench , I use a Caldwell heavy front rest and a leather rabbit-ear bag for the rear rest , and position my rifle exactly the same for each shot . Shot #1 , I pull the rifle in tight to my shoulder , concentrate on a good , smooth trigger squeeze , and make certain that I am centered on target and send it . Provided that I am on target as I should be , Shots # 2, 3, 4 , I will usually relax somewhat and shoot those 3 shots which will usually be touching each other , but not touching #1 . Shot #5 , I find myself relaxing even more , trying to send it through the same hole as the cluster of #2-3-4 , and almost always it will be not touching the others . Velocities will show #1 as the fastest , #2 ,3, 4 will be nearly the same velocity as each other , and #5 will be slower than all others , sometimes as much as 50 FPS slower than #1 , and 20+ FPS slower than #2,3,4 shots . Is the fact that I am unconsciously relaxing , thereby offering less resistance to the recoil , possibly causing the difference in velocity , causing wider extreme spreads ? The laws of physics state that "For every action , there is an equal and opposite reaction". So , if I hold the rifle tight to my shoulder , bracing against the recoil , will the bullet's velocity be faster than those shots that I relax letting the rifle free-recoil against less resistance ? Thank You All , DMP25-06 [/QUOTE]
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Can a shooter's mechanics and form influence velocity E.S.?
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