Rust on my M91/30

Did you use that surplus ammo with the "corrosive" primers? Did you clean it after every firing? Did you leave her a little oily when stored? You didn't store it in a zipped-up guncase, did you?

I use a product called Sili Kroil and it is a very good penetrating oil with silicone that will actually break down rust and prevent it from coming back. You should give it a try.

orangello said:

Did you use that surplus ammo with the "corrosive" primers? Did you clean it after every firing? Did you leave her a little oily when stored? You didn't store it in a zipped-up guncase, did you?

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I shot 2 corrosive bullets and about 3 winchester silvertips and I stored her in a zipped case after. Gave her some lube about a day before the trip it was snowing up north and she rode uncased strapped onto a 4 wheeler

Bladerunnerfury said:

I shot 2 corrosive bullets and about 3 winchester silvertips and I stored her in a zipped case after. Gave her some lube about a day before the trip it was snowing up north and she rode uncased strapped onto a 4 wheeler

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It is my understanding that fully zipped cases trap the moisture, as does the foam in those foam-lined cases. It would be better off in a cabinet. When using the old surplus ammo, it would be a good idea to clean that day and coat it with some pre-storage oil, even if it is just a hose-down with Remoil. It will wipe off easy enough when you are ready to go hunting/plinking/avalanche-freeing.

We don't get snow here much, but i doubt it helped.


I have heard that bear grease is an excellent rust preventative.

I just don't want to have a ruined gun because she is very pretty and I want only the best for my girl

Yes, the temp and moisture changes along with keeping it in the case will cause condensation and moisture issues and encourage rust. If you have to take it from cold to warm it should be uncased and then wiped down and dried off before it is put away, after it has come back to room temp in the house. Then a quick wipe with some oil.

After shooting corrosive ammo the bore needs to be hit with some hot water to remove the corrosive salts from the primers, then dried and oiled.

Should my gun be ok function wise? I got rust on the part of the bolt where the back of the case touches it.

I would want to remove the rust before using it, at least any internal rust. It probably wouldn't impair function, but why chance it.