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Durkin Tactical Franklin Armory
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Posted: 6/19/2014 10:24:43 AM EDT
I just competed my 300 blackout build and was going to load some ammo to try it out.  I made up a dummy rd to chamber it to make sure I wasn't getting any bullet set back and make sure there were no other issues.
I chambered it 4 or 5 times but I'm seeing these scratches.

Has anybody seen this before

Link Posted: 6/20/2014 6:28:34 AM EDT
Get a chamber brush and clean your locking lugs and chamber really well.  Looks to me like there are metal shavings in there.
Link Posted: 6/20/2014 8:14:03 AM EDT
Thanks I cleaned the chamber and locking lugs up and tried to chamber another round and it was a huge improvement,
you can still see some scratches but they are minor.  I think it will work itself out after shooting a few hundred rds through
it and cleaning it again. Thanks again
Link Posted: 6/20/2014 11:29:10 AM EDT
What barrel?
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