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Rifles, Reloading, Optics, Equipment
Reloading
Lets talk primers
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<blockquote data-quote="Mikecr" data-source="post: 602380" data-attributes="member: 1521"><p>I had the same shift as Broz demonstrated -and even without changing primers! The root cause(which was not easy to determine) ended up being a slipping set screw on the firing pin in the cocking piece. Once I found this, and also found that I had no reference for setting it back to load developed performance, I did some experimenting. What an opportunity!</p><p>I measured the released firing pin to boltface and tweaked the pin setting back into and through best performance. There was one place(from either side of adjustment) where everything came together with my best load, and now it was better than ever. Log that setting!</p><p>Then I changed to another primer and repeated the adjustments at the range and sure enough found a setting that worked really well with that different primer, and it was a different setting.</p><p>Just by chance(I think) my original primer choice & load performed best at it's setting so that's what I ended up going back to. But this may have been due to my set pocket depths and seated primer crush, being more/less ideal for one primer over another. All would also be affected by the trigger(as Kelby's testing elludes to).</p><p></p><p>There is a helluvalot to learn here, and until then, I say it's all as abstract as bullet seating adjustments.</p></blockquote><p></p>
[QUOTE="Mikecr, post: 602380, member: 1521"] I had the same shift as Broz demonstrated -and even without changing primers! The root cause(which was not easy to determine) ended up being a slipping set screw on the firing pin in the cocking piece. Once I found this, and also found that I had no reference for setting it back to load developed performance, I did some experimenting. What an opportunity! I measured the released firing pin to boltface and tweaked the pin setting back into and through best performance. There was one place(from either side of adjustment) where everything came together with my best load, and now it was better than ever. Log that setting! Then I changed to another primer and repeated the adjustments at the range and sure enough found a setting that worked really well with that different primer, and it was a different setting. Just by chance(I think) my original primer choice & load performed best at it's setting so that's what I ended up going back to. But this may have been due to my set pocket depths and seated primer crush, being more/less ideal for one primer over another. All would also be affected by the trigger(as Kelby's testing elludes to). There is a helluvalot to learn here, and until then, I say it's all as abstract as bullet seating adjustments. [/QUOTE]
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Lets talk primers
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