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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Importance of case head thickness relating to accuracy
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<blockquote data-quote="JustC" data-source="post: 26263" data-attributes="member: 817"><p>My 280AI is showing me she wants to group in the 2's and 3's,..BUT,every few shots she will sling one. The brass is Lapua, the cases are .001" neck runout (loaded) at most, even the foulers are only .002". I use a redding neck bushing die to size the necks down .003" and I only size about 60% of the neck. The primers are gold medal, the powders are RL22 and 7828. The bullets are SMK 150gr.</p><p></p><p>I decided to learn how to measure the case head thickness with my RCBS casemaster guage, and the directions say that if the needle stops from it's unwinding motion and reverses momentarily, that indicates an issue. Could this be my flyers shots???? or is this unrelated???</p><p></p><p>I am embarrassed to say that I have not tracked the number of firings on each case, and they are not all on the same firing either. I got this rifle along with new and pre-fired brass before I really got into the long range and reloading stages as far as I am now. The rifle will do .250", I have seen it before, what is happening here???</p><p></p><p>Thanks</p></blockquote><p></p>
[QUOTE="JustC, post: 26263, member: 817"] My 280AI is showing me she wants to group in the 2's and 3's,..BUT,every few shots she will sling one. The brass is Lapua, the cases are .001" neck runout (loaded) at most, even the foulers are only .002". I use a redding neck bushing die to size the necks down .003" and I only size about 60% of the neck. The primers are gold medal, the powders are RL22 and 7828. The bullets are SMK 150gr. I decided to learn how to measure the case head thickness with my RCBS casemaster guage, and the directions say that if the needle stops from it's unwinding motion and reverses momentarily, that indicates an issue. Could this be my flyers shots???? or is this unrelated??? I am embarrassed to say that I have not tracked the number of firings on each case, and they are not all on the same firing either. I got this rifle along with new and pre-fired brass before I really got into the long range and reloading stages as far as I am now. The rifle will do .250", I have seen it before, what is happening here??? Thanks [/QUOTE]
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Rifles, Reloading, Optics, Equipment
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Importance of case head thickness relating to accuracy
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