r/canadaguns • u/Murray3-Dvideos • Apr 23 '26
Fix my gun Difficult extraction on a Mosin Nagant. Solutions ?
Reluctantly bought a generic *run of mill* 91/30 for an embarrassing price. It has a frosty bore, but otherwise seemed to be in good - great condition with pronounced rifling.
I thoroughly cleaned the gun including the barrel and chamber.
The bolt cycles buttery smooth, chambers and extracts unfired rounds fluidly. But when fired, I gotta halfass slap the bolt up and partially back before the spent casing will properly extract.
To improve extraction, does this sound like something a good chamber polishing would solve ? Or is there some other quirky Mosin remedy I'm unaware of ?
3
u/Milkbagistani Apr 23 '26
As noted previously, this is fairly standard on wartime production Mosins.
While a polishing might help, the issue usually is with the ammo. Surplus ammo was often covered in a lacquer and the original russian manual does say to clean and lightly oil (seriously) the ammo before using. Different ammo whether steel or brass "fits" differently in the chamber and this really does matter to Mosins.
3
u/-rifle-is-fine- Apr 23 '26
Interesting. I have not seen laquered Mosin food, only SKS.
So OP could throw a box of brass soft points through it and if they don't hang up, probably surplus laquer to blame then.
3
1
u/Milkbagistani Apr 23 '26
Moldova has finally formally requested that russian military forces leave Transnistra so there may be an enormous amount of surplus X54r coming soon to a store near you. IF the russians actually do leave Cobasna
2
u/-rifle-is-fine- Apr 23 '26
My money is on Russia claiming the Moldovan government are Nazis persecuting Russia speakers and then "seperatists" with no insignia on uniform annex Transnistra.
But if they politely left and all that 54r ended up here that would be pretty tits.
1
u/GhostOoOooo Apr 23 '26
Huh. I didn't even know that was in the original manual and I've just been doing it for years.
2
u/DougMacRay617 Apr 23 '26
It didn't get the nick name garbage rod for nothing
4
u/Murray3-Dvideos Apr 23 '26
I used to think that, but over the years I have seen enough enthusiasts fine tune them to the point where they can literally run them with just a few fingers and at speeds almost matching Enfields.
2
u/Mirin_Gains Apr 24 '26
Mine is a refurb that looks like a POS with rust pits everywhere. But the bolt is easy and smooth, rifling in A condition.
2
u/Unlikely_Link_2284 Apr 23 '26
There can be left over cosmoline or build up in the chamber and that will cause cases to get stuck in the chamber Take a 410 brass brush put it on an extension from a gun cleaning kit. Put that in a drill and put some hoppeys on the brush and give it a quick clean in the chamber use a patch or 410 mop Don't over do it with the brass brush it doesn't take much to get rid of the cosmoline
2
u/Acceptable_Visit_115 Apr 23 '26
I've shot many Mosins and a few of them are like this: Impossible to cycle the bolt from the shoulder, and I'll have to break the aim and slap the bolt up. Not a problem with an empty chamber as well.
I've accepted that it's a Mosin thing...
1
u/GinnAdvent Apr 24 '26
I can imagine your let your friend shoot them on range day, and they complained that why is the extraction is so finicky.
And your non chalant response is : "it's a Mosin thing"
Lol
2
u/Acceptable_Visit_115 Apr 24 '26
Slap it! It survived 80 years and it'll outlive you. It's a gun, it'll be fine!
2
Apr 23 '26
It’s a 91/30 I don’t know what else you expected, a 2x4 can help with extraction and you won’t hurt your hand slapping the bolt.
You could have the bolt handle bent and swept or extended . it will give you more leverage
2
u/Leading_Apricot8620 Apr 23 '26
Lmao to be honest ive had the chance to try 4 mosin so far and all of them had to be roughed up for it to work
1
u/GinnAdvent Apr 24 '26
I wonder if you manage to find some of them 7.62x54R by Barnual and see if that has any significant difference.
It would be nice if you can nab a deer with a Mosin this year to cont the tradition.
RIP T81 SR, lol
2
u/Murray3-Dvideos Apr 24 '26
Ive been trying to convince a friend to plop a deer with his PU Sniper this year haha
1
u/Content_Sky_2676 Apr 25 '26
If it sticks with both commercial and corrosive ammo, and the brass doesn't show major roughness, then odds are its cosmoline in the locking surfaces.
Remove the barreled action from the stock and strip it right down and hit the area around the receiver ring with a heat gun until it's hot to touch. Watch the cosmoline bubble out. Get a leather glove and work a rag inside the action where the lugs engage to remove as much cosmoline as possible. There's almost always cosmoline back in the locking surfaces where you can't get to it that causes the bolt to bind on firing, and 99% of the time this is what causes mosins to stick.
After you've swabbed it out thoroughly, stick the receiver in a container of acetone or other strong solvent. Make sure the receiver is submerged. Leave it a day and give it another good scrubbing with a rag. Plastic brushes might break down with the acetone so stick to cotton rags. Wipe it off internally and externally and thoroughly re-oil inside and out with a penetrating oil, because it'll be completely dry and prone to rust.
Mosins don't have great primary extraction, so could be other stuff as well, but usually there's cosmoline in the locking recesses as well.
1
u/InspectorCivil6220 Apr 29 '26
it would behoove you to add protein to your diet and lift heavy rocks
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u/XilingolShepherd Apr 23 '26
During the Korean War, some Chinese soldiers even have to physically kick the bolt to get it open…