As long as there is no grit inbedded in the brass,you won't scratch the gun's chamber(s).You should see some of the brass I shoot in my guns.It is not the shining that makes the case efficient;it is its elasticity when it enpands and then shrinks back down to near original dimensions that makes it work.After all,the shine is only beautifull but serves no other purpose.Like I keep telling my wife:I might not be the handsomest guy around but I'm darn efficient!
Qc
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