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Rifles, Reloading, Optics, Equipment
Reloading
Hidden Pressure Reading: A Method
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<blockquote data-quote="DoneNOut" data-source="post: 2868067" data-attributes="member: 113404"><p>Maybe. Or maybe I am late to the party...</p><p></p><p>I have a chamber right now that isn't showing pressure signs, primers look the same whether I have a stout or light load. Sometimes I am getting fairly high velocity in a load and I know there is no free lunch. </p><p></p><p>The thought dawned on me, like an epiphany, "Hey, I trash my brass after the primer pockets wear out. Why don't I measure a virgin piece of brass and then compare virgin brass primer pocket size to primer pocket growth after firings?" </p><p></p><p>Present virgin brass primer pocket internal diameter ID .2085. </p><p></p><p>One 10ct string of fired brass still measures .2085" ID. </p><p>Another 10ct string of fired brass measures .2095" ID. </p><p></p><p>Well, maybe I should keep on with the recipe that isn't enlarging the primer pocket even after the first firing?! <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile :)" loading="lazy" data-shortname=":)" /> </p><p>I also started punching primers before tumbling because I think primer pocket cleaning sucks and I might as well let the tumbler & walnut media do it. It's way easier to knock out the walnut media stuck in the holes. In doing this I also get to inspect the spent primer. I noticed one load was producing primers with soot on the sides of the primer. Hmm, looks like pressure wanting to eek out the primer pocket, I consider this a clue!</p></blockquote><p></p>
[QUOTE="DoneNOut, post: 2868067, member: 113404"] Maybe. Or maybe I am late to the party... I have a chamber right now that isn't showing pressure signs, primers look the same whether I have a stout or light load. Sometimes I am getting fairly high velocity in a load and I know there is no free lunch. The thought dawned on me, like an epiphany, "Hey, I trash my brass after the primer pockets wear out. Why don't I measure a virgin piece of brass and then compare virgin brass primer pocket size to primer pocket growth after firings?" Present virgin brass primer pocket internal diameter ID .2085. One 10ct string of fired brass still measures .2085" ID. Another 10ct string of fired brass measures .2095" ID. Well, maybe I should keep on with the recipe that isn't enlarging the primer pocket even after the first firing?! :) I also started punching primers before tumbling because I think primer pocket cleaning sucks and I might as well let the tumbler & walnut media do it. It's way easier to knock out the walnut media stuck in the holes. In doing this I also get to inspect the spent primer. I noticed one load was producing primers with soot on the sides of the primer. Hmm, looks like pressure wanting to eek out the primer pocket, I consider this a clue! [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Hidden Pressure Reading: A Method
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