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chris in va · January 29, 2013, 11:31 PM

Just an uneducated guess...

The bolt rotates, right? I'm guessing the case is stationary while the bolt is rotating, causing the scuffs.

Perhaps it's a bit overgassed so the bolt is unlocking while the case is still 'glued' to the chamber.

January 29, 2013, 11:31 PM	#20
chris in va Senior Member Join Date: December 26, 2004 Location: Louisville KY Posts: 13,806	Just an uneducated guess... The bolt rotates, right? I'm guessing the case is stationary while the bolt is rotating, causing the scuffs. Perhaps it's a bit overgassed so the bolt is unlocking while the case is still 'glued' to the chamber.