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Major Dave (retired) · October 24, 2011, 12:12 AM

after you finish loading rifle ammo? And then you shoot it that way.

I have done that on 6 or 8 loads I worked up for my 7X57 Mauser, and I'm wondering if that's why ALL of my primers look flattened, even when shooting starter loads.

I had no other signs of excess pressure, even with my max loads.

Could it be that the (still) lubricated brass releases from the chamber walls when fired, allowing it to slam backwards into the bolt face?

And if that is the likely cause of the flattened primers, would I need to work up to max loads cautiously if I clean the lube off the brass? I'm thinking the pressures generated would be higher if the cases expanded and remained in the forward position rather sliding rearward to the bolt face. Or not?

In other words, is it necessary to remove case lube before firing reloaded ammo?

Why, or why not?

October 24, 2011, 12:12 AM	#1
Major Dave (retired) Senior Member Join Date: March 12, 2008 Location: Between Dallas and Shreveport, LA Posts: 569	What if you don't remove the case lube after you finish loading rifle ammo? And then you shoot it that way. I have done that on 6 or 8 loads I worked up for my 7X57 Mauser, and I'm wondering if that's why ALL of my primers look flattened, even when shooting starter loads. I had no other signs of excess pressure, even with my max loads. Could it be that the (still) lubricated brass releases from the chamber walls when fired, allowing it to slam backwards into the bolt face? And if that is the likely cause of the flattened primers, would I need to work up to max loads cautiously if I clean the lube off the brass? I'm thinking the pressures generated would be higher if the cases expanded and remained in the forward position rather sliding rearward to the bolt face. Or not? In other words, is it necessary to remove case lube before firing reloaded ammo? Why, or why not? __________________ Artillery lends dignity to what would otherwise be but a vulgar brawl.