Spray a little rubbing alcohol into your tumbler media and let it mix for a minute then put the oily cases in about 10 or 15 minutes later cases are clean and dry
You still have to account for the lubrication on a case that will cause it to be ever so slightly smaller than the chamber,it does take up a microscopic amount of space. Even with springback of the brass the cam action of the bolt would easily chamber the case.
Listed maximum operating pressures for any given cartridge is the pressure the gun will work at safely for a great long time without damage to the steel.going over max shortens the life span of the steel. You may be able to go on this way for some time but may be changing the crystalline...
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