annealing brass

Discussion in 'Reloading' started by jeffro, Jan 6, 2010.

  1. jeffro

    jeffro Well-Known Member

    Messages:
    192
    Joined:
    Nov 15, 2006
    I have been annealing my brass for about 12yrs now. I have been waiting until the brass has been fired 2-3 times before annealing. I just got some virgin/new Win 7mmRM brass, and Im wondering if any of you annealing it before you shoot it the first time.
     
  2. Niles Coyote

    Niles Coyote Well-Known Member

    Messages:
    172
    Joined:
    Mar 24, 2008
    If its unfired/new I can't see any benefit to annealing it as the factory would have done this after the last forming process. Now if you are working the brass and making a wild cat cartridge out of it it may be a good idea, but even then I believe most would wait till after fire forming.
     

  3. Kevin Thomas

    Kevin Thomas Well-Known Member

    Messages:
    1,256
    Joined:
    Feb 16, 2009
    Jeff,

    as Niles mentioned, virtually all factory brass is annealed, whether you can see the annealing discoloration or not. Most commercial manufacturers (Winchester, Remington and Federal, for example) polish this out, while military sources (Lake City, IMI, etc.) usually don't bother. Of the commercial makers, Lapua leaves the annealing marks in place, and clearly visible in new brass. But virtually all the makers anneal as one of the final steps in manufacture to get the hardness/maleablilty/ductility correct along various point of the case.

    Bottom line; no reason to anneal a virgin case, since there's very little likelyhood of improving it, and a distinct possibilty of doing damage to an already proper anneal.

    Kevin Thomas
    Lapua USA
     
  4. jeffro

    jeffro Well-Known Member

    Messages:
    192
    Joined:
    Nov 15, 2006
    Thanks for the info. I knew the factory annealed the brass at one point, but wasnt sure if it was one of the last procedures done to the brass. Thanks again
     
  5. Moman

    Moman Well-Known Member

    Messages:
    827
    Joined:
    Feb 7, 2008
    Jeffro, what are you using for annealing your brass? I have some Nosler 308 Win brass that is getting hardened after three loadings.