Making 30-BR from Sig 277 brass

Mike Casselton

No, I just wear the T-shirt
Full Member
Minuteman
  • Nov 25, 2007
    12,489
    25,048
    Lithia, FL
    @45-90
    Hope you don't mind me tagging you into this thread since I read where you made Dasher brass from the parent 277 Hybrid brass.

    I ordered just 100 to play around with to see if I can reasonably make brass for supersonic use only.

    I've done case forming before with 17 Ackley Hornet, 17 Mach IV, 22 BR, 30 Herrett, 309 JDJ and a few others.

    With the exception of the 30 Herrett, the other brass was realistically a simple neck, fire-form and go.

    What I'd like to figure out is the dies and steps necessary to get the Fury case shortened and formed to the 30-BR.



    Is there an easy way to just roll the shoulder down and cut the brass to the proper length?

    Is it more like using the old multi- step forming die?

    I noticed you have removable shoulder/neck buttons for some of your forming dies.

    Is that the direction I need to go?


    I'm on a retiree budget, so expensive forming dies are out of the question.

    The only lathe I have access to is the little 7x13 Grizzly in my garage. Not really the right tool for creating dies and whatnot.


    My purpose for even thinking about this is to see if I can get close to 110 and 125gr 308 performance in the little 1.5" case.
    I believe i can get close, but only experimentation will get the answer to me.

    The other use for the rifle will be standard Lapua brass and a 240-250gr bullet for subsonic use.
    I'd be shooting it to 500 yds to replicate practice to a mile+.

    I know, I'd be duplicating the subsonic 300 BO with a larger case capacity and might run into issues with it.

    What are your thoughts?

    Are the cases fairly easy to form without spending a ton on dies?
     
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