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rhuff · 07-03-2015, 05:34 PM

Just look/measure the bore(at the muzzle). A 30 Luger projectile is .309 in. in diameter. A 9mm projectile is .355in. in diameter. There is also a sticky on this forum considering this very question.

07-03-2015, 05:34 PM	#19
rhuff Patron LugerForum Patron Join Date: Mar 2011 Location: Az. Posts: 2,315 Thanks: 2,749 Thanked 999 Times in 734 Posts	Just look/measure the bore(at the muzzle). A 30 Luger projectile is .309 in. in diameter. A 9mm projectile is .355in. in diameter. There is also a sticky on this forum considering this very question.