Quoted: I've shot some surplus and some Wolf through it, both had problems. I read and found the dirty chamber explanation. So, I used a flashlight and was able to see a spot of gunk in the chamber. I used a cleaning rod, .30 cal bore brush, and 0000 steel wool to remove it. Chamber looked pretty clean. I took it out and shot it again Sunday and it's the same problem. I can start the bolt turning, but before the bolt handle goes straight up, it stops. I can use my hand and whack the handle and open it. I inspected the cases on Sunday and can't see any pressure signs. I did notice one thing that I found a little strange: at the transition bend from neck to taper, the bend was not even all the way around. The bend was higher (or closer to the case mouth) on one side than the other. Could this be indicative of a problem? Might adjusting the extractor as described in the other thread fix it? Rifle is a Hex Tula 91/30 with a non-matching (electro-penciled) bolt. |
I'm not really sure what you mean. Could you explain this better?
If you look directly into the breech, you will notice that there is a semi-circle groove on the right side in which the extractor moves while the bolt is forward. Clean it out. Also, clean out the recesses in the receiver into which the locking lugs fit. The chamber is not the only place that needs to be de-nastified.
Now, the reason you feel resistance is because the extractor is binding on something. Wolf and many types of surplus seem to have thick case rims, and this is what I would guess is the problem. You can adjust the extractor to fit and function with whichever ammo you use, but be careful. If it is too long, you will have excessive headspace. If it is too short, you will not be able to close the bolt on a live round. If it is too loose, the extractor will drop the case before ejection. If it is too tight, you will expierience the problem you have now. The reason this happens only after you fire a round is because the case expands to fill the chamber and friction prevents it from turning in the chamber when you try to cock the bolt. To fix this, some people polish the chamber to eliminate friction. Some people manually recock the cocking piece before opening the bolt (this makes opening the bolt require less manual force on the bolt knob). I find it simpler to play with the extractor until it works the way it's supposed to. Be careful when you do this. Guns are dangerous.
I am not a gunsmith, and I don't claim to be an expert. I barely suvived WECSOG school myself. I have been handing out this explanation over the last few weeks, but I could be wrong. All I can guarantee is that it has worked well for me. Use your own good sense when modifying guns.