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Gunsmithing The Patient is an AI AW chambered 300 Win Mag

TheBrewMaster

Private
Full Member
Minuteman
Apr 8, 2011
47
0
SLC, Utah
With 300 rounds through it.

It all started last week when the 4th shot was nearly hard to extract.

I didn't think much of it at the time.

This week it happened again and upon close inspection of the brass there is a small scratch that can just catch a fingernail just below the shoulder. It's about 1/4" long and crescent shaped.

I shot a few more and most of them had the same marks. Then I chambered a round and extracted it, the round was not difficult at all to extract but it still had the same mark as the brass that was already fired.

When I got home I looked at my old brass and I couldn't find any that had this mark.

What could be the problem?

Also does anyone know a gunsmith in the Utah area... preferably within a few hour drive from Salt Lake City that is not only a gunsmith but also a long range shooter?
 
Re: The Patient is an AI AW chambered 300 Win Mag

After a through cleaning I chambered a factory round and it still had the same marks.

So the problem is not the hand loads I shoot.

Anyone know a good gunsmith in Utah they would trust with their first born?

If someone can tell me how to put a photo from my computer in a post I will post a photo.

THIS SUCKS!!!
All I do M-F is get the shakes because I can't wait til the weekend to go shooting!

Anyone know a good gunsmith in Utah they would trust with their first born?

Because that's what this is like
 
Re: The Patient is an AI AW chambered 300 Win Mag

Got some pics... Hope you can see what I'm talking about. This is my first upload attempt.

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Re: The Patient is an AI AW chambered 300 Win Mag

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Here's a few that show the marks well. I agree, a borescope would be the ticket for this one. Have you shined a flashlight in there with the bolt out? Try a cotton swab to see where it gets hung up. There has got to be some crap in there or a burr?? Maybe an actual gunsmith will speak up or someone who has had the same marks.
 
Re: The Patient is an AI AW chambered 300 Win Mag

One of two things. There's a bristle from a brush inbedded in the chamber, solution a shotgun brush and give it a couple of turns in the chamber. The other is try this again with a piece of brass and see if it's not hitting the inside of the action when it clears the chamber and the ejector pivots the case into the side of the action. If you think this maybe what's happening take the ejector out and repeat the test. I'd bet this is what's happening. Does it all the time on Remingtons. Seems I remember it being in about the same location but in slightly different postion in one photos.
 
Re: The Patient is an AI AW chambered 300 Win Mag

Whatever it was it's gone now. I took a chamber brush to it and also I noticed a spot on the mag where the rounds slide out with no paint so I took a Dremel to mags.

No issues now.

Thanks for the help everyone.