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exnodak · May 2, 2013, 12:12 PM

I want to slug a 9mm barrel to determine the true groove diameter. I am getting severe leading, so I suspect it is somewhat undersize for the lead bullets I am using. Would it be OK to use a .358 diameter Brinnell 12 bullet as the slug, or do I risk getting the bullet badly stuck in the barrel?

May 2, 2013, 12:12 PM	#1
exnodak Member Join Date: April 25, 2011 Location: New Mexico Posts: 16	Slugging 9mm Barrel I want to slug a 9mm barrel to determine the true groove diameter. I am getting severe leading, so I suspect it is somewhat undersize for the lead bullets I am using. Would it be OK to use a .358 diameter Brinnell 12 bullet as the slug, or do I risk getting the bullet badly stuck in the barrel?