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Old August 2, 2012, 05:33 PM   #6
Senior Member
Join Date: May 19, 2011
Location: Eastern IA
Posts: 428
Don't forget the K31's typically have a .304"-.306" groove diameter barrels for that slightly smaller 7.5 mm bullet.
Wait, what? Where did this information come from? I haven't seen anyone say they had a barrel slug out at .304", it's usually .307" and occasionallly .306". According to the Swiss military, GP11 uses a bullet up to .3087".

Edited to correct a misremembered measurement.

Last edited by Scimmia; August 2, 2012 at 05:54 PM.
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