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Rifles, Reloading, Optics, Equipment
Reloading
Polishing a body die?
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<blockquote data-quote="Bart B" data-source="post: 837428" data-attributes="member: 5302"><p>Larry,</p><p></p><p>I've never had a primer in a primed case without powder or bullet back out of it's pocket any amount; not even with a weak firing pin spring in several centerfire rifles. I've shot dozens of them and they all stayed a couple thousandths below flush with the case head. There's too much force from the firing pin spring to let them back out. Cases so fired had their shoulders set back the same amount as if a dead primer was used. Proof to me that the case shoulders gets set back solely from firing pin impact on .308 Win. cases.</p><p></p><p>Only with live ammo with extreme reduced loads (more than 10%) in .308 Win. cases have I seen the primer backed out from flush with the case head. The more reduction there is, the more the primer is left sticking out of the case. With less than 10 % reduced loads with 168's in .308 cases (at least 40 grains of IMR4064 or 38 grains of IMR4895), the primer does back out a bit past case head to start out with, but the pressure at its peak is enough to push the back part of the case rearward until it stops against the bolt face pushing the primer back flush with the case head.</p></blockquote><p></p>
[QUOTE="Bart B, post: 837428, member: 5302"] Larry, I've never had a primer in a primed case without powder or bullet back out of it's pocket any amount; not even with a weak firing pin spring in several centerfire rifles. I've shot dozens of them and they all stayed a couple thousandths below flush with the case head. There's too much force from the firing pin spring to let them back out. Cases so fired had their shoulders set back the same amount as if a dead primer was used. Proof to me that the case shoulders gets set back solely from firing pin impact on .308 Win. cases. Only with live ammo with extreme reduced loads (more than 10%) in .308 Win. cases have I seen the primer backed out from flush with the case head. The more reduction there is, the more the primer is left sticking out of the case. With less than 10 % reduced loads with 168's in .308 cases (at least 40 grains of IMR4064 or 38 grains of IMR4895), the primer does back out a bit past case head to start out with, but the pressure at its peak is enough to push the back part of the case rearward until it stops against the bolt face pushing the primer back flush with the case head. [/QUOTE]
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Polishing a body die?
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