SVT-40: is this normal?

TheWharGoul

TheWharGoul

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Hey, went out shooting today and finally got to bring out the SVT. I was shooting some non-corrosive and it was failing to eject so I tried the corrosive stuff and it ejected fine but I noticed that they were coming out looking like this (both types had this mark). I didnt know what it was so I decided against shooting off anymore. Can you tell me whats going on and is this normal?

Casing.jpg


thanks!
 
I can't see your picture but I am imagining it to have flutes in the brass. Yes this is normal, it helps with brass extraction. The SVT40 is hard on brass, I wouldn't bother trying to reload for it. Keep feeding it the heavy ball Czech and enjoy.
 
As mentioned, the chamber of your SVT is fluted to assist extraction. This was done on earlier SVTs. My 1943 Tula has not got it but all my 40/41 dated rifles do.
G3 and other types exibiting abrupt cycliing (delayed blowback designs etc.) use the same thing to assist extraction.

As far as your non corrosive not extracting, is it seizing in the chamber or just not getting enough gas to cycle?
 
Sorry to hi jack. My buddies SVT is nothing but problems - untill the point that he will ask a milsurp dealer to exchange it. It doesn't extract worth of crap.

Only works on 1.7 setting on the gas valve. Any other settings it will try to extract the brass about 5mm and lock up to a point there the chargning handle has to be yanked back quite hard.

We cleaned the gas system to no avail. Both hungarian and czech surplus does the exact same thing.

100 rounds and not one mag without a jam.

We also noticed that the gas piston extension is slighly peened and gets stuck in the receiver hole.
 
Paulinski said:
Sorry to hi jack. My buddies SVT is nothing but problems - untill the point that he will ask a milsurp dealer to exchange it. It doesn't extract worth of crap.

Only works on 1.7 setting on the gas valve. Any other settings it will try to extract the brass about 5mm and lock up to a point there the chargning handle has to be yanked back quite hard.

We cleaned the gas system to no avail. Both hungarian and czech surplus does the exact same thing.

100 rounds and not one mag without a jam.

We also noticed that the gas piston extension is slighly peened and gets stuck in the receiver hole.
Click to expand...

Your gas piston extension should move freely and not intefere with tunnel it travels in.

Cases sticking in the chamber is another matter and may point to a defect there. With 5mm of extraction the case should move freely. What do your extracted cases look like?
 
Does it happen on the first or subsequent shots? A bit of cosmoline still in the chamber may cause the casing to stick after a few shots.
 
The brass looks like the ones pictured above. The piston rod extension does not move freely in the receiver. The end is peened a bit.

Also what would cause the bolt to lock after moving 5mm?

Doesn't matter how many rounds in the magazine.

Bottom line is it only work on 1.7 gas regulator setting.

Very dissapointing so far.
 
eos said:
As mentioned, the chamber of your SVT is fluted to assist extraction. This was done on earlier SVTs. My 1943 Tula has not got it but all my 40/41 dated rifles do.
G3 and other types exibiting abrupt cycliing (delayed blowback designs etc.) use the same thing to assist extraction.

As far as your non corrosive not extracting, is it seizing in the chamber or just not getting enough gas to cycle?
Click to expand...
Just not enough gas to fully cycle... Guess its Corrosive ammo for it. gah why!? So much cleaning..... :(

Thanks for the replies.. sorry for being such a noob! haha.
 
I usually find my SVT locks up only when the gas valve moves off of the 1.7 setting, which it does after getting hot. I have been told to lock-tite it, but I am hesitant to put anything (semi) permanent on it like that, so I carry a rubber mallet with me and keep an eye on the gas settings.
 
Rifle was probably run too long with the gas setting too open. Damage results to the rod extension, causing it to bind up. Check it for true, carefully remove any end peening. The worst case would be if it has whacked the receiver hard enough repeatedly to start buckling the entire frame (that was the reason they gave up on the full auto versions, beside the fact that you couldn't hold onto them!)
 
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