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Rock River

I have a Rock River LAR 10. I have resized the LC brass and it will not chamber all the way. It appears to hang up near the base of the brass. Anybody else have this problem?

Was the brass originally fired in your gun?  If it's been fired in another, it may have been a machinegun or other type with an oversize chamber that allowed the base to swell.  There are "small base" dies specifically made to solve this problem

Are you using a headspace case gage to check the adjustment of the sizing die? If not, I strongly suggest added one. I suspect incorrect size die adjustment is a likely cause of your problem.

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