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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
What do you think is WRONG with my bench shooting?? Group?
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<blockquote data-quote="emp1953" data-source="post: 1767302" data-attributes="member: 71817"><p>Here's something that bit me in the butt several years back. I probably tried to get too many reloads out of my brass (not the case any more). Out of a stock Rem700 in 30-06 I'd get a goofy result somewhat like yours with enough regularity to cause quite an investigation among members at the local shooting range. What we eventually found was that neck tension was way down in some of rounds allowing bullets to jump forward slightly changing my .020 setback from the rifling to change to .012 or less. I had put 4 rounds in the magazine and one in the chamber and took the first shot. Dead center. Then someone else jumped in with some "precision" ammo so I dumped the magazine and loaded up with his ammo, took four shots, no errant outliers. Then I started looking at the ammo standing in front of me and they looked like they were different lengths. I carry my dial micrometer in my range bag and made the discovery. Bullets were jumping forward during recoil. Now I reload the same case maybe 2 or three times. I never did load hot loads. No more errant outliers. As stupidly simple as that. It doesn't seem possible that there could be so many variables, but there are.</p></blockquote><p></p>
[QUOTE="emp1953, post: 1767302, member: 71817"] Here's something that bit me in the butt several years back. I probably tried to get too many reloads out of my brass (not the case any more). Out of a stock Rem700 in 30-06 I'd get a goofy result somewhat like yours with enough regularity to cause quite an investigation among members at the local shooting range. What we eventually found was that neck tension was way down in some of rounds allowing bullets to jump forward slightly changing my .020 setback from the rifling to change to .012 or less. I had put 4 rounds in the magazine and one in the chamber and took the first shot. Dead center. Then someone else jumped in with some "precision" ammo so I dumped the magazine and loaded up with his ammo, took four shots, no errant outliers. Then I started looking at the ammo standing in front of me and they looked like they were different lengths. I carry my dial micrometer in my range bag and made the discovery. Bullets were jumping forward during recoil. Now I reload the same case maybe 2 or three times. I never did load hot loads. No more errant outliers. As stupidly simple as that. It doesn't seem possible that there could be so many variables, but there are. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
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What do you think is WRONG with my bench shooting?? Group?
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