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ithacaartist · 03-02-2012, 12:52 PM

A standard pencil is introduced to the muzzle, and if it slips easily to the bottom, it's 9 mm. If it does not go, it's a 7.65 mm.

03-02-2012, 12:52 PM	#25
ithacaartist Twice a Lifer Lifetime Forum Patron Join Date: Mar 2011 Location: Atop the highest hill in Schuyler County NY Posts: 3,419 Thanks: 7,605 Thanked 2,672 Times in 1,403 Posts	A standard pencil is introduced to the muzzle, and if it slips easily to the bottom, it's 9 mm. If it does not go, it's a 7.65 mm.