Mosin Nagant

L

lefkosia

New member
I recently bought a Mosin Nagant and of course it has cosmoline. I took it apart wiped it down and cleaned out the grease with qtips. Then I cleaned barrel and lubricated gun. Is this enough? I did not do all the soaking in hot water etc...

This rifle has not been counter bored but the rifling looks very deep and barrel is shiney. The rifling is very prominent, kinda rough looking, this is puzzling. Has anyone seen rifling like this?
 
recommend dis-assemble the bolt and clean it too (if you didn't already).

Soviet QC, especially in wartime ammo is kind of ..erratic. Deep rifling helps make up for a sloppy bullet fit. (helps). Groove diameter in these guns is known to vary considerably from the established spec.
 
Not sure what you mean by "rough looking"...
Is it the lands, or the grooves to which you're referring?

When you say you cleaned out the grease (cosmoline) with Q-tips, it sounds like you didn't use solvent. You'll never remove all the cosmo without solvent- particularly in the area of the locking lugs in the receiver. This area is critical to be completely clean- or you'll have trouble running the bolt, and will suffer from "sticky bolt syndrome" if there's any leftover cosmoline here. It will heat up after a few shots, and cause the lugs to begin sticking.

Remove the receiver from the stock, disassemble the bolt as mentioned above (You-tube vids for this), and spray all the metal parts liberally with brake cleaner before re-assembling. This includes the bore...then run a few patches down with your usual bore cleaner, then a lightly oiled patch.
 
Thanks for the replies. I cleaned the bolt etc. This gun just did not have much cosmoline and is in great shape.

Shot it yesterday and it was a joy but it shoots 10 inches high or so. I am going to raise front site and then I should be in business.

Surprised this gun does not kick much and is relatively quiet. The other Mosins at the range where the short models and they were extremely loud.
 
Look for KraigWYs instructions on how to alter your rear sight to zero it at 100 yards.

I found them- hopefully Kraig won't mind...Here's the link to that thread:

http://thefiringline.com/forums/showthread.php?t=480424&highlight=mosin+rear+sight

"Most Mosins shoot high. There are several reasons given, which is true is anyone's guess.

The question is how to fix it. I want to keep my Mosin legal per CMP GSM Rules which precludes me from adding different sights or going to scopes so I fixed the sights.

I found by measuring the sight radious of the rifle that for every .0061 inches I could lower the rear sight or raise the front sight I could lower the impact 1 MOA. Again I can't add a taller front sight and keep the rifle with in specs.

My rifle shot 8 inches high so I had to lower the rear sight .0488.

If you flip up the rear sight you'll notice the sight proper, (the part that slided up and down) sets on the sight base which gives you your elevation increases.

I took the sight off the rifle, stuck it in a milling maching and milled off .0488 of the bottom of the sliding part, that allowed the sight to set .0488 lower. Now when I have the sight setting on the 100 mark, its sighted in at 100 yards, on 200 its sighted in at 200, 300 at 300 and 400 at 400.

My range only goes to 400 so I haven't tried it past that but there is no reason to doubt it wouldnt work at extended ranges.

This in no way screws up the sight for CMP games, once you put the put the sight back on the rifle you can't even tell it was modified.

You don't have to use a milling machine, you can use a file, but be careful to keep it flat, and don't take off too much. A bit of filing, measuring and filing again will get you there.

These rifles will shoot, we just need to get them set up for us and our ammo."
 
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My MN hid a bunch of cosmo in the bolt. After a few shots, the bolt would heat up, the cosmo would migrate to other parts of hte bolt and it would "lock up." I ran a bunch of bike chain lube through that bolt until it stopped running out brownish. The problem went away after that.
They are great rifles. Enjoy
 
"Most Mosins shoot high. There are several reasons given, which is true is anyone's guess.
Click to expand...

The usual reason given why so many military rifles of this era shoot high at 100yds is that they were intended to be zeroed at 300 yards or meters.

We also hear the story about how in that era, troops were taught to aim at the belt buckle of a standing enemy. This will still result in a hit, in many cases, when the soldier's estimate of the enemy's range is off.

Its also possible that it is you, and the way you look through (and align) the sights.

Or, it could also be the ammo you are using, not being what the rifle was set up to use.

No matter the reason, its your rifle, do what you need to get it to shoot the way you want.

7.62x54R ammo comes in a lot of different flavors, light ball, heavy ball, etc., and sometimes isn't identified (or identified properly) by the time it gets in your hands.

Before making any permanent changes to the rifle, I would at least try some different ammo, and see what the results are.
 
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