Mosin sticky bolt
- Thread starter lorne19
- Start date
The bolt on my M91 becomes "sticky" when I operate it too slowly but I think the "sticky" definition is when you have fired a round and are unable to open the bolt without using a bit of upper body strength. If I recall correctly, this was solved by either making sure the cosmoline and crude was remove from the outer chamber area and from the bolt pieces itself and, in some cases, by trimming one piece off of the firing pin spring.
Someone correct me if I am wrong though.
Someone correct me if I am wrong though.
When firing mil surplus rounds in my Mosin after about 5 shots the chamber heats up and the bolt will stick and I have to force it open. I know that the problem is a cosmolin build up in the chamber, plus a lacquer build up from firing mil surplus rounds. My only question is how to get rid of it so it doesn't stick anymore.
- Location
- Smithers, B.C.
Deer Stalker, excellent post. That link should be stickied on the Forum somewhere, as I have used it and it has solved ALL of my sticky bolt issues. The problem is a 50/50 between cosmoline buildup in the reciver/chamber and over tension of springs. A little secret, it was apparently common in the Finn army (not sure if the Russians did this) that if your bolt stuck, you took it apart, soaked it in gasoline, dried and oiled it and snipped off one link of the spring. Reassemble and done in about 15 min tops. It's solved most sticky issues I have. The Mosin bolt, though strong, does not have the same camming leverage action as other bolt actions.
Get the barrel as hot as you can;Safely of course. Pull the bolt and run in a brass wire 20 gauge bore cleaner on a short section of cleaning rod. Soaked in your favorite bore cleaner and inserted in the chuck of a cordless drill. That'll knock the cosmoline off of it...just go easy. Power tools save effort; but too much arrives really fast
Cosmo in the Chamber, just clean it realllll good.
The video's help alot, but if you feel weird about sticking a drill into your chamber just give it a very good cleaning with some patches first.
Try that, then if that fails give the drill trick a try.
The video's help alot, but if you feel weird about sticking a drill into your chamber just give it a very good cleaning with some patches first.
Try that, then if that fails give the drill trick a try.
