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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Applied Ballistics 'Shoot Thru Target' Challenge
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<blockquote data-quote="KYpatriot" data-source="post: 1017194" data-attributes="member: 48028"><p>Well, the way to know for sure is shoot one of these rifles that exhibits this shrinking moa grouping behavior using Bryan's pass thru target test. Lots of people say they see it, but until it is demonstrably proven by recording group sizes at two different ranges in one firing I still believe it is something optical or shooter related. </p><p></p><p>One of these rail guns would be perfect for it...extreme repeatable precision and the weight and tracking reducing shooter influence. For instance if we saw such a rifle in a disciplined, controlled test print a .75 inch hundred yard group and the very same bullets grouped an inch at 300 that would likely lead us in the direction that there is an external ballistics reason, especially if it did the same thing with a different parallax setting, a fixed power scope, or no scope at all. </p><p></p><p>Most of the time I hear of this phenomenon from shooters flinging the heavies...300gr .338s or the various 375 and 408 cheytac rounds. It comes up enough that I know that good shooters are observing the effect, I just wonder about why it happens. It would be cool if someone with a rifle that does this a lot would run this test and help figure it out. Might lead to a great understanding of external ballistics, better optics construction, shooter technique or a combo of those.</p></blockquote><p></p>
[QUOTE="KYpatriot, post: 1017194, member: 48028"] Well, the way to know for sure is shoot one of these rifles that exhibits this shrinking moa grouping behavior using Bryan's pass thru target test. Lots of people say they see it, but until it is demonstrably proven by recording group sizes at two different ranges in one firing I still believe it is something optical or shooter related. One of these rail guns would be perfect for it...extreme repeatable precision and the weight and tracking reducing shooter influence. For instance if we saw such a rifle in a disciplined, controlled test print a .75 inch hundred yard group and the very same bullets grouped an inch at 300 that would likely lead us in the direction that there is an external ballistics reason, especially if it did the same thing with a different parallax setting, a fixed power scope, or no scope at all. Most of the time I hear of this phenomenon from shooters flinging the heavies...300gr .338s or the various 375 and 408 cheytac rounds. It comes up enough that I know that good shooters are observing the effect, I just wonder about why it happens. It would be cool if someone with a rifle that does this a lot would run this test and help figure it out. Might lead to a great understanding of external ballistics, better optics construction, shooter technique or a combo of those. [/QUOTE]
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Applied Ballistics 'Shoot Thru Target' Challenge
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