Fireforming Brass 338 Lap Imp and 6.5 Lap Imp.

Discussion in 'Reloading' started by HammerB1, Feb 26, 2010.

  1. HammerB1

    HammerB1 Official LRH Sponsor

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    Having a 338 Lapua Imp and 6.5 x 47 Lapua Imp built and need some load data to fireform brass without sending bullets down the tube. Plan on using cornmeal for filler on top of powder charge. Any help would be awesome.

    Thanks
     
  2. trueblue

    trueblue Well-Known Member

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    Feb 18, 2008
    I can't help you much on this , other than to say I think guys are using pistol powders like Unique. Having said that, I just shoot my brass while doing barrel break in and load developement and fireform it then for my wildcats. Also shoot fireform rounds for fouler shots.
    Also, I find that my fireforming rounds are just as accurate as my one fired.
     

  3. dirtball

    dirtball Well-Known Member

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  4. J E Custom

    J E Custom Well-Known Member

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    +1

    Use a good quality bullet ,Use a reduced load (10 %).and seat the bullets against the
    lands(For the best concentricity and zero head space).

    If the case is not held perfect to the center line of the bore the cases "can" expand
    with the head and neck off center.

    I also use break in ,fouling and some preliminary load development to fire form.

    J E CUSTOM