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Rifles, Reloading, Optics, Equipment
Reloading
Standard deviation in .223 Rem
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<blockquote data-quote="J E Custom" data-source="post: 293389" data-attributes="member: 2736"><p>VH.</p><p> </p><p>In my experience the very small/light bullets are harder to get single digit SDs but it's possible.</p><p></p><p>Normally the reason for poor SDs is inconsistent combustion.</p><p></p><p>Some of the causes = Inconsistent; neck tension,volume of case,bullet seating depth,wrong</p><p>powder and primer combination.</p><p></p><p>My best guess would be the primer. You need to try a different one and see if the problem improves or worsens.(Nothing wrong with the primer you are using it just may not be the one</p><p>your loads like.</p><p></p><p>Next = I would not bump the shoulders unless they are hard to chamber.(When the firing pin</p><p>strikes the primer if the round moves to much it will cause inconsistent primer strikes and thus</p><p>poor ignition.</p><p></p><p>the third thing would be bullet seating .It normally effects accuracy more but with the vld's</p><p>it is important to seat closer to the lands (5 to 15 thousandths) than with the standard ojive</p><p>bullets.</p><p></p><p>I would work on changing only one thing at a time to find the culprit.</p><p></p><p>Just a few things to try.</p><p></p><p>J E CUSTOM</p></blockquote><p></p>
[QUOTE="J E Custom, post: 293389, member: 2736"] VH. In my experience the very small/light bullets are harder to get single digit SDs but it's possible. Normally the reason for poor SDs is inconsistent combustion. Some of the causes = Inconsistent; neck tension,volume of case,bullet seating depth,wrong powder and primer combination. My best guess would be the primer. You need to try a different one and see if the problem improves or worsens.(Nothing wrong with the primer you are using it just may not be the one your loads like. Next = I would not bump the shoulders unless they are hard to chamber.(When the firing pin strikes the primer if the round moves to much it will cause inconsistent primer strikes and thus poor ignition. the third thing would be bullet seating .It normally effects accuracy more but with the vld's it is important to seat closer to the lands (5 to 15 thousandths) than with the standard ojive bullets. I would work on changing only one thing at a time to find the culprit. Just a few things to try. J E CUSTOM [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Standard deviation in .223 Rem
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