Originally Posted by
number9xd
I've shot LOTS of Brown Bear through my DoubleStar and the bolt does not look like that. That looks to me like the bolt would almost have had to be that way when you bought the gun. I can't see the ammo causing that in a range session.
That looks like 1) a really poor casting - but maybe not cause the area of the U-shapped valley doesn't look like the rest of the bolt, or 2) the gas tube, gas key, barrel *maybe* had some junk in them from manufacture and as you were firing the rifle the junk was blown into the gas key, resulting in the junk being sprayed back up inside the carrier and all over the bolt as it was operating back and forth?
What does the inside of the bolt carrier bore look like? That will tell you if there was junk in there grinding on the bolt (and bolt carrier bore) or if maybe the bolt itself just came that way?
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