Small case rupture(s)

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  • Art3

    Eqinsu Ocha
    MDS Supporter
    Jan 30, 2015
    13,324
    Harford County
    While I was going through the old ammo, I found this:

    other ammo.JPG

    It is a different headstamp (WRA 57), but was stored with the FA 38. What I find interesting is that I rotated each of these cartridges 90 degrees. All of the corrosion stains had been where the cases were touching (or almost touching) each other in the stripper clip (which was corroded inside as well). While it's a lot younger, I don't think I'll be shooting this either.

    It does make me wonder if the cracks in the FA 38 had something to do with touching each other in the stripper clips?

    All of this ammo my father had been storing in the same ammo box, virtually undisturbed probably since they moved into their house in 1979ish. Except for this and a couple other clips, most of the ammo looks fine. In fact, most of the 1938 ammo looks as new (or at least untarnished) as the HXP 62 that I unspammed myself last year. There was even some ammo in Garand clips that looks fine. I would think, being brass ammo in steel clips, it would be the first to corrode if there had been any sort of contamination of this particular "stockpile."

    Looks like I'll be putting my bullet puller to work when it arrives.:D
     

    StickShaker

    Active Member
    Mar 3, 2016
    888
    Montgomery
    This is getting real interesting. How about this theory? The brass being in contact with the steel clips is creating a very small voltage and over a long period of time caused galvanic corrosion where the brass cases are touching. Was this ammo in sealed cases or could it have been subjected to moist air?
     

    John from MD

    American Patriot
    MDS Supporter
    May 12, 2005
    22,960
    Socialist State of Maryland
    This is getting real interesting. How about this theory? The brass being in contact with the steel clips is creating a very small voltage and over a long period of time caused galvanic corrosion where the brass cases are touching. Was this ammo in sealed cases or could it have been subjected to moist air?

    Good theory. If there was any moisture in the can when he sealed it, the dissimilar metals could have set up a galvanic cell and the less noble metal, brass, would have been the one to deteriorate.

    OP Here is some advice from someone who has pulled literally thousands of bullets since the inertia puller was invented by Quintonics. Before you try to pull the bullet, put the round in your press and adjust the seating stem to push the bullet back about 1/8 of an inch. This will break the seal and the bullet will pull with less effort.

    With older military cartridges, you will find the black sealant which really holds the bullet in tight. Additionally, some foreign cartridges have really stout crimps, especially machine gun ammo, and can even be hard to set back in the case. In both cases setting back the bullet further will make pulling them much easier.

    In any case, the brass in the pictures you posted show that they are no longer serviceable and should not be fired.
     

    Pinecone

    Ultimate Member
    MDS Supporter
    Feb 4, 2013
    28,175
    Typically, green corrosion can be removed and the ammo fired.

    Pink corrosion is a no-no. It eats right through the case.
     

    Art3

    Eqinsu Ocha
    MDS Supporter
    Jan 30, 2015
    13,324
    Harford County
    I didn't think it would be galvanic corrosion because the bad cartridges are in brass stripper clips...so no dissimilar metals there. The ones in Garand clips were fine. I was looking at those like the canary in a coal mine. They should have been more corroded than the ones in brass clips, I would think. The ammo has been in stored in an ammo box for the last 25-30+ years, only opened a couple of times. Before that...who knows? :shrug:

    That's a good tip about breaking bullets loose. :thumbsup: The Hornady Cam-Lock bullet puller I ordered arrived today. I used it to pull the one with the cracked case, but I still had to use use the seating technique to get it out. That bullet was tight! Inside...there was really nothing to see. I thought maybe there would be some sort of internal deterioration at the site of the crack, but not as far as I could tell. Hmmm...I just had a thought...tomorrow I'll squeeze it in pliers to see if it crushes like it should or fractures because it's brittle.

    I also pulled and cut open one of the really corroded ones...again, nothing exciting to see inside. The bullet did come out a lot easier...though it was not a sexy boattail like the older ammo.

    I was not aware of the different corrosion colors. That's good to know.:thumbsup:

    I definitely won't be shooting this ammo, but, as suggested, I will harvest the bullets. I hate throwing anything away, so I might use the brass for something artistic or maybe dummy rounds. What's a good way to kill the primers, soak in water overnight?

    Thanks for all the responses. :)
     

    Melnic

    Ultimate Member
    MDS Supporter
    Dec 27, 2012
    15,373
    HoCo
    OP Here is some advice from someone who has pulled literally thousands of bullets since the inertia puller was invented by Quintonics. Before you try to pull the bullet, put the round in your press and adjust the seating stem to push the bullet back about 1/8 of an inch. This will break the seal and the bullet will pull with less effort.

    Excellent advice and glad I read this thread. I have some old surplus ammo (Czech 7.62x54r training ammo) that I wanted to pull the bullets but they were crimped so tight, I could not. The bullets are hollow and so the Inertial puller does not work so well. Even my 30cal bullet puller for the press was slipping on it. Heavy crimp it has.
     

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