Removing Cosmoline from rifling

[eighteenninetytwo]

what it the best way to get cosmoline from the rifling of a milsurp. It' obvioulsy been brushed through and has wedged in the grooves. It's old and hardened and I don't want to damage what looks like a brand new barrel from the outer finish and the crown.

[mauser98k]

hot water down the barrel should melt it.

clean it like you had fired corrosive ammo

[finloq]

1. Point rifle down range.
2. Pull trigger.

The best way to clear out old cosmo is heat and friction, both of which, you get in spades with a bullet propelled at high velocity down the barrel.

[killathrilla]

...

[OHOD]

I boil up a kettle of water and pour it down the barrel. After it cools down, I run a wire cleaning brush through.
Then I pour boiling water down the barrel again.
The hot water evaporates quickly.
Then I clean it as usually, Windex and water, then Hoppes 9. Followed up by a light coat of oil.


That's just me, I'm sure you'll get a whole bunch of different recipes.

[OHOD]

hot water down the barrel should melt it.

clean it like you had fired corrosive ammo

Basically I do the same thing.

[cruddymutt]

another vote for hot water and bore brush.

[knucklehead0202]

if it's not too much i'd go for the shoot first, then clean method. that'll get that crap out real quick. Kroil may worth a shot afterward. my Jungle Carbine had a pretty dark bore even after my initial once-over cleaning. i went and shot it, cleaned with Hoppe's, then soaked with Kroil and let it sit, swabbed it out and it became beautiful. henceforth, there will always be a bottle of Kroil to go with my Hoppe's No. 9. enjoy your c&r, a satisfying experience easier than having a child in most cases. don't ask me how i know...

[Call_me_Tom]

I'd spray it down with starting fluid.

[Agustav]

I used to do the muzzle down in the sun in the hot Southern California summer then push out with brush and patches (lots).

Lately I've been using the hot water method not only on the barrel but the action as well... works great and in less time! Just be sure to lube well afterward.

[CEDaytonaRydr]

1. Point rifle down range.
2. Pull trigger.

Potentially VERY dangerous. Even when you buy a new gun with no cosmoline, they tell you to run a patch or a bore snakedown the barrel to remove residual oil. With cold, solid cosmoline in the barrel, you could see pressures in excess of what the action/barrel can take.

Shooting a rifle with Cosmo in the action is a terrible idea. Plus, it atomizes and blows back in your face, which is a risk to your eyesight...



To the OP - I use carburetor chem dip and brake cleaner to remove cosmo. Works great...

[hunteran]

Another vote for boiling water. I poured a kettle full of boiling water down the barrel of my new (old) vz 24 when I got it. Followed by a borebrush, several patches, and another kettle of boiling water and more borebrush+patches. It accomplished in about 5 minutes what 45 minutes of scrubbing and countless patches+solvent couldn't. PS, watch out, the barrel and receiver get HOT.

[finloq]

Potentially VERY dangerous. Even when you buy a new gun with no cosmoline, they tell you to run a patch or a bore snakedown the barrel to remove residual oil. With cold, solid cosmoline in the barrel, you could see pressures in excess of what the action/barrel can take.

Shooting a rifle with Cosmo in the action is a terrible idea. Plus, it atomizes and blows back in your face, which is a risk to your eyesight...



To the OP - I use carburetor chem dip and brake cleaner to remove cosmo. Works great...

True, if cosmo was forming any kind of blockage. But, he already stated that he has "brushed it through". Therefore, I read it that there is no cosmo (or other substance) blocking the bore. He has a darkness in the grooves.

[CEDaytonaRydr]

True, if cosmo was forming any kind of blockage. But, he already stated that he has "brushed it through". Therefore, I read it that there is no cosmo (or other substance) blocking the bore. He has a darkness in the grooves.

He said that "it" (cosmoline) has been brushed through and "...has wedged in the grooves."

Not that he has brushed out the barrel. He is asking how to get cosmoline out of the rifling. Until he does remove the cosmo from the barrel & action, it should NOT be fired.

[eighteenninetytwo]

Thanks for all the advice. As the sun appears to have disappeared in san fran, kettle, hoppes and breakfree it shall be.