91/30 Mosin Nagant. What did I do? or did I?

[40 caliber]

I just bought a 91/30 Mosin Nagant. After cleaning the cosmoline, I noticed these bumps all over the receiver. I used Mineral Oil suggested from another post. . (was it supposed to be mineral spirits? ) . I used mineral oil on an SKS cleaning and had no problem so I dont think that is it The only other things I can think of is that there may have been some ammonia on the rag from a corrosive ammo cleaning -or- these bumps were there all ready and became visible after the cosmoline came off. This gun was purchased as a shooter, so I don't care that much. I do have a 91/30 hand picked Hex Beauty that I bought as well. I don't want this to happen to that if I did in fact cause the issue.

Pics attached. they are not the best, but they were the best I could get out of my camera in about 20 shots.
thanks in advance.

 

[vellnueve]

Your pics are pretty bad, but they look to be pre-existing.

 

[Tommy Gun]

I agree, it looks like it was there awhile.

Tom

 

[40 caliber]

yes, I thought so too. it appears to be normal pitting now that I take a close look. This was not visible at all until the cosmoline came off. That is why it concerned me.

figured rather be safe than sorry . had to check

 

[jpattersonnh]

Mineral spirits work great on small parts. Don't use ammonia! Simple soap and hot water works best.

 

[40 caliber]

no the ammonia MAY have been on the rag from cleaning a barrel with corrosive ammo. I was not even sure it was the same rag, I was just trying to figure it out

thanks

 

[martin08]

The surface itself looks uneven. Likely these were pitted areas before the refurb process and the bluing didn't take as well.

I'll even bet that the X54 bullet won't even know as it is flying downrange!

 

[majspud]

Hey, it adds character. Consider it a case of acne.

MS

 

[SKS Ray]

Looks like a run of the mill 91/30 shooter if you ask me. Buff it downwith oil and 00 steel wool like I mentioned in PM, shoot it, and enjoy it.

For perfect bluing and a great finish in Mosin rifles... get yourself a mint Polish M44. You won't even want to handle it they're so beautiful.