Mosin Nagant, two questions


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Frank A
November 24, 2008, 12:40 PM
I have had several Mosin Nagants in the past and love them. I am down to one right now and have a problem with it.

When I shoot it, ususally on the third round the bolt will not come open. I am sure I have read about this somewhere but cannot remember or figure out what is causing it and so cannot fix it. I have had to use a mallet to get it open. It has happened every time I take it out. After three times, I quit shooting it. :confused::rolleyes:

Second, I am interested in rebarrelling the Mosin and am interested in what you all have done along this line. What are good rounds for it, and what do I need to look out for.

Thanks for the help.

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esmith
November 24, 2008, 12:50 PM
1. You have cosmoline in the bolt. People on this board seem to like to call it 'sticky bolt syndrome'. Either way, when the bolt heats up the cosmoline melts and gets stuck in between every nook and cranny of bolt, making it hard to open. Take the bolt apart and blast it with carbuerator/brake cleaner to dissolve the grease.

2. Rebarreling a mosin is too much work for what its worth. You are better off buying a new one, or fifty new ones. Rechambering a mosin to a different cartridge which it seems you wanted to do in your OP is a whole process alltogether which i don't know much about. I know that it would be a PITA to do though.

jr45
November 24, 2008, 01:04 PM
Actually sounds like laquer built-up in the chamber. I had this problem with both my M44 and 91/30. Much of the older ammo used had a laquer coating on the cases and after a while, the laquer coating would build-up in the chamber. When the barrel gets hot from shooting, the laquer acts like a glue. Clean the chamber out very well with an oversize bore brush and solvent and you may even want to use a cordless drill to spin the brush.

esmith
November 24, 2008, 01:26 PM
Actually sounds like laquer built-up in the chamber. I had this problem with both my M44 and 91/30. Much of the older ammo used had a laquer coating on the cases and after a while, the laquer coating would build-up in the chamber. When the barrel gets hot from shooting, the laquer acts like a glue. Clean the chamber out very well with an oversize bore brush and solvent and you may even want to use a cordless drill to spin the brush.

People constantly say that laquer can build up in the chambers of guns and eventually cause them to lock up. I don't believe this. I, myself, and another member on this board, have taken a lighter to a spent x39 laquered case for about 5 minutes, and neither one of us got laquer to melt off the case. When i swiped the case with a towel there was nothing left behind.

And if laquer did melt and adhere the case inside of the chamber, it would have to cool down a bit before it would be locked in there. If you ejected the case right away you would think it wouldn't lock up.

jr45
November 24, 2008, 01:36 PM
People constantly say that laquer can build up in the chambers of guns and eventually cause them to lock up. I don't believe this. I, myself, and another member on this board, have taken a lighter to a spent x39 laquered case for about 5 minutes, and neither one of us got laquer to melt off the case. When i swiped the case with a towel there was nothing left behind.

And if laquer did melt and adhere the case inside of the chamber, it would have to cool down a bit before it would be locked in there. If you ejected the case right away you would think it wouldn't lock up.

Esmith,
This is my personal experience with both of my mosins. I had the sticking bolt issue. I brought both of my rifles to a gunsmith whom showed the chamber through a bore scope and I could see some type of build-up in the chamber. Once this build-up (I assume laquer) was removed...no more sticky bolt. I also get a simular build-up in my AK when using the old laquer Wolf ammo.

Mike U.
November 24, 2008, 06:16 PM
Build up in the chamber of my mosins was fixed by using a suitable solvent and an over-sized bore brush spun with a drill. Took repeated rounds of this method to do this as there was some very stubborn gunk in there. Likely to have been built up from years of use before me.
Finally got it done and now I have no problems. For now. I do use Czech Silver Tip and those rounds have a bit of a reputation for causing this problem.
Great downrange accuracy though. :D

Here's an interesting read on Mosin ammo. Lacquer build-up is mentioned in the first paragraph or so.
http://7.62x54r.net/MosinID/MosinAmmo.htm

Gottahaveone
November 24, 2008, 06:24 PM
Build up in the chamber of my mosins was fixed by using a suitable solvent and an over-sized bore brush spun with a drill. Took repeated rounds of this method to do this as there was some very stubborn gunk in there.
My first one wouldn't open after the 3rd round without some assistance from a 18" piece of 4x4. I did exactly this (used a 20ga shotgun brush and Hoppes) and it took about 45 seconds of drill spin before the patches of gunk weren't visible in the chamber anymore. You can't make that puppy lock up now. I can't imagine that the brass bristles wore too much chamber away, and I can actually shoot it now :D

SoCalShooter
November 24, 2008, 06:27 PM
Had a similiar issue with the bolt sticking on my DCM m1 garand, cosmoline heated up and cause the rifle to jam any ANY rifle that is surplus and has possibly been in cosmoline needs to be seriously cleaned.

alemonkey
November 24, 2008, 08:01 PM
I wouldn't say rebarreling a Mosin isn't worth it. Check out this thread:

http://surplusrifleforum.com/viewtopic.php?f=82&t=29075&p=185258&hilit=lothar#p185258

You won't get anywhere near what it's worth if you sell it, but that's the same with any custom rifle. You do it for fun, not for the money.

rangerruck
November 24, 2008, 10:30 PM
rebarreling is a waste on a 100 dollar rifle. find diff ammo, if this is one with a bayonet on it, you will never get it very accurate, less than 5 inches at 100 would be impressive.
find dif ammo; look for new made, wolf , brown bear, silver bear, or any milsurp 170 grains or more. they were actually found to be sniper accurate, with 182 to 185 grainers, plus they switched to this weight, to get an extra 500 meters, for volley/artillery type firing. all the mosins I have shot prefer the silver bear 185's, or the brown bear 205 grainers. and I mean a big accuracy improvement over th147 or 150's.

rangerruck
November 24, 2008, 10:31 PM
oh yeah, you have cosmo still stuck in the chamber, take a drill, put in a 30 cal chamber brush, put in some cleaner, and take your time. then clean and use some jb bore paste, and polish it with a 30 cal mop.

NCsmitty
November 24, 2008, 11:24 PM
The most common Mosin complaint is sticky chambers causing hard bolt opening, due to dried cosmoline that was never removed properly.

NCsmitty

paintballdude902
November 24, 2008, 11:58 PM
for the chamber get a brass brush (dont remember which fits the chamber best) dip it in some hoppes #9 and attach a cleaning rod to a drill and go at it nice and slow for like 30 seconds

i cant remember if you wrap 00 steel wool around it or if that was for something else

dont mean to hijack but anyone got advice on cleaning up a rusty/pitted bore?

i got my mosin for free from my bil and the bore hadnt been cleaned in 10 years so had rust in it...alot i ran my bore cnake with hoppes on it like 10 times the did a bunch of oil on it and ran it thru another 5 times

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