Crater in SKS chamber

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Super GunNutz
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Never seen this before. I picked up an SKS for dirt cheap as the owner couldn't get a stuck casing out. The back end of the casing had been ripped off and it took me a lot of heat and slamming on a ruptured case extractor to get it out. The chamber was very badly pitted and rusted. When I cleaned it out, I was shocked to see this divot the size of a grain of rice in there. The casing (steel) had a corresponding hole in it where the detonation had blown it in. Anybody ever seen the like and how the hell was it made? It wasn't from the initial attempt at extraction from what I can see.
 
Likely the rust ate in pretty deep there , weakening the metal and left that divot upon shooting and cleaning. I had a generator fuel tank one time that held fuel but the carbs keep clogging up , I took the tank off to clean it out and as I cleaned it and removed the rust it made holes in the tank as the rust ate that deep , could be same principal here , just a theory.
The divot may have been there from some previous damage years ago and the rust was just masking it. Another theory , but I think my first theory is more likely.
Like has been said it's good for a parts gun anyway for sure , or buy a barrelled receiver and swap out.
 
zuke said:
Part's gun now
Click to expand...

Yah. I bought it as a parts gun. I of course was hoping it would clean up but for $75 it was well worth the parts. It always amazes me how people can run a gun till it is a rusty hulk and then be surprised that it doesn't work.
 
So, just for the hell of it. I polished the chamber starting with 180 emery cloth down to 440. This buffed out a lot of the pitting and gave a smoother although not perfect finish. After thoroughly cleaning the chamber, I then filled the crater with JB Weld. 36 hours later (this morning) I took it to the range and test fired it My initial few shots were taken without an extractor as I didn't want to damage it if the case stuck. The empty casing flew out after each shot just from the recoil. All of the cases came out without hesitation and with no deformation. 40 rounds later, with extractor reinstalled, all is well. So that was fun and it worked.
 
Good old JB weld and another use for it.We use JB weld on our high power rocket motor retainers, has a higher temp. rating than other epoxies.

Hope it lasts for many years !!

PT
 
Yah, you just have to love JB Weld. I only stated using it a few years ago. Mostly to build up surfaces that I didn't want to heat too much. Once on there, it just does not come off. It takes a tremendous amount of pressure and holds up to a lot of heat.
And yes. An AR geek would freak. Russians would have used flour and water :)
 
Jb weld is so versatile. I use a lot of JB marine too, and high temp quick steel. I just used high temp quick steel putty to bed and stiffen the gas tube cover on my timbersmith sks stock. Worked like a charm, rock solid now.

Kudos on the chamber repair! That's pushing the limits of JB's Magic but I'm not surprised that it worked out!
 
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