HighLine Firearms
Low Price Guns
Southwest Firearms
Sporting Systems
Gun Deals
Oregon Rifleworks
Buster Beaver Cerakote
Defensive Arts
J&B Firearm Sales
Advertise on Northwest Firearms
Simply Triggers
Could someone who works on or uses the mosin rifle please explain the causes and cures for the Mosin sticky bolts? I have had this issue with two of mine requiring beating on the bolt-handle to open them up, and have heard that I'm not the only guy to have experienced this problem.. Thanks, Dun
 
Messages
1,088
Reactions
1,523
Could someone who works on or uses the mosin rifle please explain the causes and cures for the Mosin sticky bolts? I have had this issue with two of mine requiring beating on the bolt-handle to open them up, and have heard that I'm not the only guy to have experienced this problem.. Thanks, Dun
Have you taken the bolt apart to clean out any cosmoline residue?
 
Messages
3,370
Reactions
8,748
There was a reason they were selling for under $100 just a few years ago. Heck, I paid $89 for mine in 2017. If you disolved all the cosmo from the bolt assembly, chamber, and receiver, I would wonder if the bolt numbers match the receiver? Just my guess. Cosmoline gets very hard over time and might be gumming up the receiver ring or compacted on the face of the barrel.
 

Aero Denezol

Messages
2,405
Reactions
5,577
Cosmoline in the chamber. Use a spray bottle from the dollar store to douse the chamber with mineral spirits. You can also use a 12 gauge bore brush attached to drill at very low RPM to scrub the chamber.

The new mfg. steel case ammo (Tula) has a coating that gets stuck in the chamber when the case expands. The most reliable and cost effective ammo is the surplus copper washed ammo. Unfortunately it is also corrosive. But as long as you clean your guns after shooting this shouldn't be a problem.
 
  • Useful Info
Reactions: AMT
Thanks guys... I had cleaned the bolts but not soaking them in anything... Thought that all the cosmo was removed. I will try this and give it another go. Compared to the Mausers the Mosins are second-string:p but I do like the "feel" of them and know they served well in many conflicts.... I like lugging and shooting mine and the bolt issues have been very frustrating!:eek: Thanks again, Dun
 

ma96782

Messages
8,488
Reactions
14,577
There are many reasons....see the numerous YouTube videos.

You may just end up trying them all.

And, I didn't see it mentioned but.....also check the headspace. I once swapped bolt heads between a M91/30 rifle and an M44 carbine that I had. And well, it worked better after the swap. Of course, check the headspace to complete the "fix". Perhaps, it was the lugs? Whatever, bolt heads are made so that they can be easily changed.

Aloha, Mark
 
Last Edited:
Messages
890
Reactions
1,209
Dude as a long time Mosin lover, i have rifles that were epic in how they worked and ones, well sigh were just junk..most of the comments are right, if you can strip your rifle all the way down give it a good 48 hour soak in whatever your best cleaner solvent it, a lot of guys like brake cleaner. Next get a 20 guage hone and gently hone the inside of the chamber also some fine dental pics to get at the hard to reach prehistoric cosmoline. Next polish your bolt a lot of them were well made in a hurry and have a bunch of burrs on them, and next by a set of USA made GO NO GO FIELD gauges. If all else fails, live with it, also i have found that the high quality ammo helps a lot, the stuff from tula is junk, in my mosin at least, it loves the S/B 154 grain..but that is JMHO...carry on comrade.

IMG_0664.JPG
 
Sporting Systems
Copeland Custom Gunworks
Advertise on Northwest Firearms
Cerberus Training Group
Let Freedom Ring
Southwest Firearms

Upcoming Events

Jefferson State Shooting Association Gun Show
Klamath Falls, OR
Wes Knodel Gun Shows
Redmond, OR
Rickreall Winter Gun Show
Rickreall, OR

Latest Resource Reviews

New Classified Ads

Top