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Rifles, Reloading, Optics, Equipment
Reloading
Ok, this is weird
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<blockquote data-quote="bdyal1972" data-source="post: 1971068" data-attributes="member: 50039"><p>Powder burn speed in the case AND bullet travel time in barrel IMMENSELY IMPACT bullet impact! Barrel whip complicates this even more!</p><p></p><p>Try loading the SLOWEST POWDER minimum load AND the FASTEST minimum load in the same case, same bullet.</p><p></p><p>1 5 round group each.</p><p></p><p>Compare velocity vs impact location vs group size..</p><p></p><p>It will educate you even more if you throw a mid burn rate powder....</p><p></p><p>Start a ladder test on each.</p><p></p><p>Keep targets and compare the progression of the impact group location....</p><p></p><p>On extremely slow powders and 26, 28, 30 inch powders i have seen impact location go down 5 inches and BACK UP 3 inches!!!</p><p></p><p>I believe this is associated with recoil interaction with the body compared with barrel whip.... i also have seen the same phenomenon between shooting from the difference of bench, prone, prone bipod, shooting sticks and over a stump!!!</p><p></p><p>Some loads 4" vertical diffetence!!!</p><p></p><p>Some 8" vertical difference!!!!</p><p></p><p>Gotta know how position interacts with impact!</p><p></p><p>Just 2 cents from an inquisitive amature wanna be!!! With a background in physics and metrology!!!!</p></blockquote><p></p>
[QUOTE="bdyal1972, post: 1971068, member: 50039"] Powder burn speed in the case AND bullet travel time in barrel IMMENSELY IMPACT bullet impact! Barrel whip complicates this even more! Try loading the SLOWEST POWDER minimum load AND the FASTEST minimum load in the same case, same bullet. 1 5 round group each. Compare velocity vs impact location vs group size.. It will educate you even more if you throw a mid burn rate powder.... Start a ladder test on each. Keep targets and compare the progression of the impact group location.... On extremely slow powders and 26, 28, 30 inch powders i have seen impact location go down 5 inches and BACK UP 3 inches!!! I believe this is associated with recoil interaction with the body compared with barrel whip.... i also have seen the same phenomenon between shooting from the difference of bench, prone, prone bipod, shooting sticks and over a stump!!! Some loads 4" vertical diffetence!!! Some 8" vertical difference!!!! Gotta know how position interacts with impact! Just 2 cents from an inquisitive amature wanna be!!! With a background in physics and metrology!!!! [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
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