Robert, I agree with police lugers that you don't want to over polish the PO8 chamber. If it is pitted or damaged, this could cause excess friction and make extraction difficult. If eroded, and your case is expanding, your only real alternative is to replace the barrel. A light polish of the feed ramp done with a dremel and light abrasive, will sometimes help, where the rounds want to "smokestack" on feeding. Tom
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