Quantcast
  1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

8mm shoulder collapsed

Discussion in 'Handloading and Reloading' started by prickett, Sep 7, 2009.

Thread Status:
Not open for further replies.
  1. prickett

    prickett Member

    Joined:
    Jun 14, 2007
    Messages:
    194
    I broke out my 8x57 reloading equipment for the first time in > 10 years yesterday and loaded up 10 rounds. Upon finishing, I realized the shoulders had collapsed. It appears as if the seating stage is possibly forcing the bullet into too small of a mouth, which in turn is collapsing the shoulder. Does that sound reasonable or can you think of another reason I'd be seeing this?

    I've used this brass and these bullets before without problem (albeit > 10 years ago).
     
  2. rcmodel

    rcmodel Member in memoriam

    Joined:
    Sep 17, 2007
    Messages:
    59,082
    Location:
    Eastern KS
    I'd have to guess you have your seating die screwed in too far and it is crimping the case mouth too much.

    Seating a bullet will not collapse the shoulder.
    Too much crimp will.

    rc
     
  3. Steve H

    Steve H Member

    Joined:
    Nov 10, 2006
    Messages:
    1,328
    Location:
    Southern Utah
    A picture would help. Could you have too much case lube on the case?
     
  4. evan price

    evan price Member

    Joined:
    Dec 7, 2005
    Messages:
    5,476
    Location:
    http://www.ohioccw.org/ Ohio's best CCW resour
    +1 to RCmodel. If your shoulder is bulging out after seating, your seater is screwed in too far.
     
  5. prickett

    prickett Member

    Joined:
    Jun 14, 2007
    Messages:
    194
    Thanks for the info. I'll adjust the seater/crimp and try again.
     
  6. steve4102

    steve4102 Member

    Joined:
    Oct 14, 2004
    Messages:
    2,452
    Location:
    Minnesota
    Raise the ram, screw the die into the press until the die bottoms out on the shell holder, back the die OUT at least one full turn.
     
  7. rcmodel

    rcmodel Member in memoriam

    Joined:
    Sep 17, 2007
    Messages:
    59,082
    Location:
    Eastern KS
    That may or may not work with all dies.

    The best way to set it with no crimp is to:
    1. Run a sized case all the way up in the loosened die.
    2. Then screw the die in until you feel the dies crimp shoulder contact the case mouth.
    3. Then back the die off a 1/2 turn or so and lock the lock-ring.
    4. Then adjust the seating stem to the proper cartridge OAL.

    If you desire a crimp:
    1. All cases must be trimmed to the same length.
    2. Step #2 above is the starting point.
    3. Screw the seating stem out slightly, and screw the die in slightly further until the desired amount of crimp is applied, and lock the lock rings.

    rc
     
    Last edited: Sep 9, 2009
  8. average_shooter

    average_shooter Member

    Joined:
    Jan 26, 2007
    Messages:
    1,269
    Location:
    mn
    Or...just get a Lee Factory Crimp Die. I'm another proponent after having the same issue with my .223 Rem. plinking loads. The Lee die supposedly re-re-sizes the case also, to make sure the shoulders don't buldge/collapse. I've given up trying to load and crimp in one stage for most of my reloading, especially when I've got the space for the crimp die on my progressive set-up.
     
  9. jjohnson

    jjohnson Member

    Joined:
    Oct 7, 2005
    Messages:
    1,181
    Location:
    Rochester, Minnesoviet
    Die screwed down too far or way too much lube.

    Either can do it - check 'em both - I'm betting it's the die adjustment, though, if they're all doing it. If it's lube, you'll usually get some but not all acting that way. Back off your die and see what happens.
     
  10. Walkalong

    Walkalong Moderator

    Joined:
    Nov 20, 2006
    Messages:
    46,755
    Location:
    Alabama
    The rifle FCD does not "resize" the case. The pistol FCD "post sizes", but not to the degree the sizer does.

    Follow rcmodels advise.
     
Thread Status:
Not open for further replies.

Share This Page