SVT 40 and mosin issues

J

jon1985

CGN Regular
Rating - 100%
25   0   0
Location
Carleton Place, Ontario
Hello,

I have both a mosin and SVT 40 and they are fun to shoot. However, I have an issue with each.

The mosin wont feed properly. When I fill the magazine it only allows me to chamber the first round. The rear rim of the case gets stuck in the ejector interrupter.Any thoughts?

As for the mosin, when I bought it from a CGNer it hadnt been cleaned and was still covered in cosmoline. I cleaned it and reassembled it.
It fires but does not cycle on 1.5, I uped it to 1.7 and it fires, but the cases are very dirty after firing. Any tips?

I love these guns and cant wait to put more rounds down range with them.

Thanks
 
Svt, run it as low as it will go and be reliable. Make sure the gas port is clean, not much else to do.

Mosin, check that the interrupter works, and that the stock doesn't interfere. Had a mosin with an after market stock that had to be modified slightly.
 
The SVT 40 has a fluted chamber, so it is normal for the cases to be dirty. Wondering how this was an issue anyway? If the gun works fine, why is it an issue that brass is dirty?
 
No, it shouldn't impact accuracy. Also remember surplus ammo tends to be very dirty. You don't notice this nearly as much with a bolt action as you do with a semi-auto.
 
For the 91/30 make sure you aren't causing rim lock by improperly loading the magazine.

You could also try tightening the interruptor screw if it's loose.

Loosing the actions screws if they're too tight and have brought the magazine too close to the interruptor / receiver (common problem) may help. If this is the case, shim the recoil lug and tang to give more distance between the receiver and the magazine. Smith sights sells shim kits or you can cut them out of brass shim stock and/or credit cards.
 
jon1985 said:
Hello,

I have both a mosin and SVT 40 and they are fun to shoot. However, I have an issue with each.

The mosin wont feed properly. When I fill the magazine it only allows me to chamber the first round. The rear rim of the case gets stuck in the ejector interrupter.Any thoughts?

As for the mosin, when I bought it from a CGNer it hadnt been cleaned and was still covered in cosmoline. I cleaned it and reassembled it.
It fires but does not cycle on 1.5, I uped it to 1.7 and it fires, but the cases are very dirty after firing. Any tips?

I love these guns and cant wait to put more rounds down range with them.

Thanks
Click to expand...

Keep shooting and cleaning the SVT and you should be able to bring it down to 1.5 , don't oil to much. Mine was shooting at 1.7 only for awhile after 4-5 cleaning i can bring it to 1.3
 
I have a Mosin Nagant where the rim of the cartridge would get hung up on the back end of the slot in the receiver. The slot was milled with rounded corners that did not offer quite enough clearance for the rims to clear as they passed up from the magazine into the receiver. I simply filed the rounded corers of the slot into more of a square shape, and the problem was fixed.
 
My M44 does the same thing when i try and run stripper clips or dont pay attention when im loading by hand. Its a bad interrupter. Someone once suggested to me that if it's not a collector, pick up a finnish rimlock proof magazine and maybe a single piece interrupter kit.

Since i wont be going to war with mine and i dont need to load with strippers, im not going to bother.
 
The SVT also can have a couple issues ive found with failing to eject on 1.5 or less. check the cup and piston for goo/rust. If it's really rough you might consider grabbing a stainless cup and piston set. The other thing you can do is use a thicker grease on you cup and piston to get a better seal. same on your gas regulator, they leak a bit. Also make sure the chamber isnt burred/sticky and the fluting is clean.

Check to make sure the piston rod isnt bent. I picked up a rifle from a gun show and it cycled like crap. Had a bent piston rod, it was binding on the plunger deally under the rear sight.
 
derr12 said:
The SVT also can have a couple issues ive found with failing to eject on 1.5 or less. check the cup and piston for goo/rust. If it's really rough you might consider grabbing a stainless cup and piston set. The other thing you can do is use a thicker grease on you cup and piston to get a better seal. same on your gas regulator, they leak a bit. Also make sure the chamber isnt burred/sticky and the fluting is clean.

Check to make sure the piston rod isnt bent. I picked up a rifle from a gun show and it cycled like crap. Had a bent piston rod, it was binding on the plunger deally under the rear sight.
Click to expand...

Where can I get a stainless cup and piston?
 
I had a damn weird stoppage with my SVT today, thought I broke it.

I started on 1.5 and it wouldn't cycle the chinese ammo I have, which it sometimes will or won't on 1.5 so after clearing the stoppage with the sling, cause it was a hard extract; I set it to 1.7 and fired a 5-round group, no problem. I reloaded and got off one round and it stopped.

The bolt seemed partly forward, so I tapped it froward and it chambered the remaining 8th of an inch or less, pulled the trigger; nothin. expectuing another hard extraction, I try and #### it and to my surprise, it ejects a live round. Okay, whatever; let go of the handle and it chambers; squeeze, bang! No ejection; same again, but now the round is spent.

I take it off the line and there is obviously something wrong cause the bolt is flopping around; so I break it down and the front half of the return-spring-rod assembly is hung up inside the bolt inside it's slot. had to get home before i could get a pair of pliers that were small enough to get it out; when I pried it out, I found the spring had humped over the connecting piece in the middle and pinched inside the bolt. I pulled it free, bent the offending spring end and reassembled the weapon as per. Function tested just fine.

But what caused this and how do I prevent it in the future?


Thank you for your time.
 
As for the cup and piston, I picked it up from a fella selling it online down in the states. Ppsh.com or something, google should find for you. As for your second question, that's a new one, I've never seen a failure like that before, but it sounds like the gas setting is pounding the crap out of your springs. I'd go no higher than 1.5 with 150gr ammo. You also might have a blown out spring now too, if you can find replacement springs I'd try a new set.
 
As a whole it sounds like your problems are cases sticking in the chamber.high gas setting required to eject spent ammo, when it does bust loose its slamming back too hard. A polishing compound on a chucked shotgun brush might be in order. Before you do that, maybe hit your chamber good with some laquer thinner and inspect spent cases for scratches. You might have a metal burr.
 
jon1985 said:
Hello,

I have both a mosin and SVT 40 and they are fun to shoot. However, I have an issue with each.

The mosin wont feed properly. When I fill the magazine it only allows me to chamber the first round. The rear rim of the case gets stuck in the ejector interrupter.Any thoughts?

As for the mosin, when I bought it from a CGNer it hadnt been cleaned and was still covered in cosmoline. I cleaned it and reassembled it.
It fires but does not cycle on 1.5, I uped it to 1.7 and it fires, but the cases are very dirty after firing. Any tips?

I love these guns and cant wait to put more rounds down range with them.

Thanks
Click to expand...

Have you checked the gas piston and cup, are they in decent shape or is there a lot of pitting? You may have to get a replacement piston and gas cup eventually.

But if it runs reliably on 1.7 then giver until she doesn't anymore. Also what kind of shape is the gas regulator in, I'm talking about the little vent holes. Is there any hard rust in there choking them off.

As for dirty brass, that is perfectly normal. Especially with the cheap milsurp combloc ammo.
 
The pistol and cup look fine to me. I checked out 111.ppsh41.com and found they still have the stainless parts, so I will get some when I can. They had springs too, but no more and never again it seems, so that will be on my list as well.

I *Think* the regulator is fine, looks it to me anyways. I'll try reaming it out if I can.
 
jon1985 said:
Hello,

I have both a mosin and SVT 40 and they are fun to shoot. However, I have an issue with each.


As for the mosin, ( SVT 40 ) when I bought it from a CGNer it hadnt been cleaned and was still covered in cosmoline. I cleaned it and reassembled it.
It fires but does not cycle on 1.5, I uped it to 1.7 and it fires, but the cases are very dirty after firing. Any tips?

I love these guns and cant wait to put more rounds down range with them.

Thanks
Click to expand...

It's common for SVT's to have throat erosion, yours sounds severe. This is what is causing the dirty cases. There is nothing you can do about it other than install a new barrel.
 
You must log in or register to reply here.
Back
Top Bottom