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Rifles, Reloading, Optics, Equipment
Reloading
Primer Pocket Uniforming
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<blockquote data-quote="Mikecr" data-source="post: 1252820" data-attributes="member: 1521"><p>I doubt it.</p><p>I had a firing pin slip under it's set screw once that led me to striking tests. What I saw through adjustment of pin protrusion from bolt face, was a coming into and out of best precision.</p><p>It was very similar to results of bullet seating testing.</p><p>This testing was from a standard primer seating, which had primers preloaded to 4thou crush in standard pocket depths(as uniformed with the fixed Sinclair tool). The seating was with an indicated K&M, and my headspace is always set to 1thou bump.</p><p>Through prior testing I've found that different primer brands perform better with either 2, 4, or 5thou of crush(CCIs requiring the most, Rems the least).</p><p></p><p>I currently have a headspace issue with a pistol that causes accuracy and reliability failures where ammo rim thickness varies by too much. This seems just a few thou to problem, so the gun's striking must be on a hairy edge of function.</p></blockquote><p></p>
[QUOTE="Mikecr, post: 1252820, member: 1521"] I doubt it. I had a firing pin slip under it's set screw once that led me to striking tests. What I saw through adjustment of pin protrusion from bolt face, was a coming into and out of best precision. It was very similar to results of bullet seating testing. This testing was from a standard primer seating, which had primers preloaded to 4thou crush in standard pocket depths(as uniformed with the fixed Sinclair tool). The seating was with an indicated K&M, and my headspace is always set to 1thou bump. Through prior testing I've found that different primer brands perform better with either 2, 4, or 5thou of crush(CCIs requiring the most, Rems the least). I currently have a headspace issue with a pistol that causes accuracy and reliability failures where ammo rim thickness varies by too much. This seems just a few thou to problem, so the gun's striking must be on a hairy edge of function. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Primer Pocket Uniforming
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