Chinese SKS issues

[Harry Ono]

It looks like my Chinese SKS will need to has some work done to fix my F2F and F2E. Im getting stovepipes on last round using Russian made steel (Red Star and Wolf) ammo. The last round unfired is ejected before being chambered and fired. Its only on the Last round. Doesnt matter if i loaded 3, 5 or more rounds. So the Bolt is slamming into the last round. Also tried Brass ( Fiocchi ) which will eject unfired last round with 2nd spend cartridge, but no stovepipe and no bolt slamming into last round. Just ejects with spend prior round.

Anyone have this issue? Is it a leak on the gas piston issue. I stripped it down and piston isnt that dirty nor is the spring old, also the recoil spring went in correctly. Top of the gas cylinder isnt 90 decrease, its off. Poor milling.

[Danodog]

Recoil spring may need replacement. Krusty cosmeiline in the wrong places can cause problems too. If you have deep cleaned and you are confident, the a spring replacement might be a first step. Who knows how many rounds went through that rifle.

[mtenenhaus]

some relate a somewhat similar scenario with problem feed lips and follower (http://www.sksboards.com/smf/index.php?topic=148583.0,) after of course a very thorough cleaning

[Bainter1212]

Check the chamber for pitting. The chamber WILL pit if corrosive ammo was fired through it without a thorough cleaning. That will create a drag on the casing as it is extracted.

Also, don't open the mag and dump the rounds in through the bottom, then close the mag. The SKS will do weird things when you do this. See Jerry Miculek's SKS speed shooting vid if you don't believe me......mine have all done the same as his when I loaded that way.

[Harry Ono]

Check the chamber for pitting. The chamber WILL pit if corrosive ammo was fired through it without a thorough cleaning. That will create a drag on the casing as it is extracted.

Also, don't open the mag and dump the rounds in through the bottom, then close the mag. The SKS will do weird things when you do this. See Jerry Miculek's SKS speed shooting vid if you don't believe me......mine have all done the same as his when I loaded that way.

Thanks, I did a breakdown and checked everything. Not dirty or pitting at all. But I did add shells from the bottom per Jerry Miculek youtune video. I also fed from the top open bolt adding one at a time. Same results. Did not use stripper clips.

[bohoki]

sounds like a magazine lip problem ive read what you have said 3 times and i think you are sayig as round 9 is ejecting the bolt somehow releases round 10th to pop out

yea if you do the drop in the bottom method half the time the follower will leave a space and on the last round the cartridge will shift towards the center and pop out

always load from the top

sometimes a magazine can get out of sorts if someone removes it without having the bolt back if you just jerk it out it will open the lips up

[MajorSideburns]

Do you have another SKS to compare to or swap some parts? Maybe the magazine spring is not strong enough to keep good pressure against the top feed lips, and the last round is bouncing out. The fact your issue is repeatable with the last round makes me think that is the case. In my experience it is usually a magazine spring when having exclusively last round issues. Make sure the magazine spring is not gunked up with cosmoline, its a very easy place for lots of it to hide

[MajorSideburns]

Just wanted to add, a cheap way to test this out without extra parts is to take the magazine spring out and stretch it apart a bit. If your problem is fixed or better, you know that the spring is the issue and you can order a replacement.

[Harry Ono]

went to the range and still has issues

I fed from the top ,5 rounds each and resulted in last unfired round stovepipe,
Not all the time, but out of a box of 20 rounds resulted in 2 stovepipes.

also noticed the gas tube was rather hot.

Will need to go into shop. i did see others have similar issues.
I did find a replacement for the gas tube which also has rail for SKS.
Might be interesting if its the gas tube needs to be replaced due to gas leak.

https://www.tapco.com/sks/sks-gas-tube-with-handguard.html

[God Bless America]

Gas tubes on SKSs don't leak. All the work is done in the gas block. The tube only covers the piston and keeps it aligned.

Does the bolt lock back after the last round? Place a round in the mag, let the bolt fly home, shoot, and see.

If it locks open, gas is OK.

If not, gas may be an issue.

Stovepipes only on the last round = mag issue.

Not gas.

[Harry Ono]

Gas tubes on SKSs don't leak. All the work is done in the gas block. The tube only covers the piston and keeps it aligned.

Does the bolt lock back after the last round? Place a round in the mag, let the bolt fly home, shoot, and see.

If it locks open, gas is OK.

If not, gas may be an issue.

Stovepipes only on the last round = mag issue.

Not gas.

Here is some more details.

on the last round, unfired round stovepipes with bolt slamming into the unfired round, bolt does not lock open. And as you stated, may have a gas issue. And it might be the Mag lip as well. Found similar issue on Youtube. Others might have similar issues, so might find solution soon.

https://www.youtube.com/watch?v=0ECggSRpCoE&t=210s

[God Bless America]

Lock bolt back on empty mag.

Put one round in mag.

Let bolt fly home. Should chamber the round.

If not, mag fo sho.

If it does, then fire it, see if bolt locks back on the empty mag.

If it does lock back, gas is OK.

If it does not lock back, gas is suspect.

That video is wrong. SKS gas tubes are not pressurized. There is no 'leak', as they are vented anyways. ALL the work is done in the gas block. Not the gas tube.

[boris badinov]

Description of the problem sounds very specifically like a mag feed lip and/or follower problem as others have said.

[Harry Ono]

Lock bolt back on empty mag.

Put one round in mag.

Let bolt fly home. Should chamber the round.

If not, mag fo sho.

If it does, then fire it, see if bolt locks back on the empty mag.

If it does lock back, gas is OK.

If it does not lock back, gas is suspect.

That video is wrong. SKS gas tubes are not pressurized. There is no 'leak', as they are vented anyways. ALL the work is done in the gas block. Not the gas tube.

Thanks for the info, feeding one round (single shot) from the top works fine.
No issues regarding ejection of spent round. Will go into shop to get checked.

[Harry Ono]

Description of the problem sounds very specifically like a mag feed lip and/or follower problem as others have said.

Any idea on reason why gas tube getting rather hot ?
we are talking about after 10 rounds or so. Thanks in advance.