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The Range
Ammo & Reloading
Lapua 30cal 170gr FMJBT Lock-base Load Data
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<blockquote data-quote="swampratt" data-source="post: 3973525" data-attributes="member: 15054"><p>Your 9MM case on top of a rifle case will work fine for the measurement.</p><p>Yes Winchester cases are softer and thinner and grow much longer than Lapua cases on each firing.</p><p></p><p>About 22 bucks for annealing kit.</p><p>[ATTACH=full]350723[/ATTACH]</p><p></p><p>Now I have tested 308 cases until failure and Lapua went 50 rounds before case head crack and that was FLS every time.</p><p>Winchester I think went 14 or 18 reloads R-P went I think 54 times.</p><p>Load was 41.5 gr and 165 bullet so low end of the scale.</p><p></p><p>The reason I anneal is not because I fear a case neck crack.</p><p>I do not get those.</p><p></p><p>It is because Annealing for me slightly tightens my groups.</p><p>If you shoot 200 or 300 yards at paper and get that occasional round in left field annealing can pull that round back in with the others.</p><p></p><p>Now when I seat bullets I pay very close attention to the force it takes to seat them.</p><p>If you have very even seating forces then annealing may not help you much.</p><p></p><p>But if you get to a point where you seat one and it slicks right in and then the next one needs twice the force to seat the bullet then annealing will help.</p><p></p><p></p><p>That is after all other things have been considered.</p><p>Did one case have more lube in the neck and cause the odd seating force difference.</p><p>Was one case measuring .3075" ID and another measuring .307" or .306" ID.</p><p>Did you rub your nose or forhead and then pick up a bullet to seat it ?</p><p>That oily finger just lubed a bullet.</p><p></p><p>By the group sizes you stated you get I am sure your prep is spot on.</p><p>100 yard groups are easy and for me do not tell the entire story.</p><p></p><p>I get to 200 yards and farther then i see things and find out what type of prep works and what does not.</p></blockquote><p></p>
[QUOTE="swampratt, post: 3973525, member: 15054"] Your 9MM case on top of a rifle case will work fine for the measurement. Yes Winchester cases are softer and thinner and grow much longer than Lapua cases on each firing. About 22 bucks for annealing kit. [ATTACH type="full" width="354px" alt="1676908094796.png"]350723[/ATTACH] Now I have tested 308 cases until failure and Lapua went 50 rounds before case head crack and that was FLS every time. Winchester I think went 14 or 18 reloads R-P went I think 54 times. Load was 41.5 gr and 165 bullet so low end of the scale. The reason I anneal is not because I fear a case neck crack. I do not get those. It is because Annealing for me slightly tightens my groups. If you shoot 200 or 300 yards at paper and get that occasional round in left field annealing can pull that round back in with the others. Now when I seat bullets I pay very close attention to the force it takes to seat them. If you have very even seating forces then annealing may not help you much. But if you get to a point where you seat one and it slicks right in and then the next one needs twice the force to seat the bullet then annealing will help. That is after all other things have been considered. Did one case have more lube in the neck and cause the odd seating force difference. Was one case measuring .3075" ID and another measuring .307" or .306" ID. Did you rub your nose or forhead and then pick up a bullet to seat it ? That oily finger just lubed a bullet. By the group sizes you stated you get I am sure your prep is spot on. 100 yard groups are easy and for me do not tell the entire story. I get to 200 yards and farther then i see things and find out what type of prep works and what does not. [/QUOTE]
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Lapua 30cal 170gr FMJBT Lock-base Load Data
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