.338 edge freebore

Discussion in 'Gunsmithing' started by sixtwoeightyfour, Apr 29, 2012.

  1. sixtwoeightyfour

    sixtwoeightyfour Member

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    how much freebore are you guy running in your edge on remington action running 300 grain SMK and Bergers? What OAL? Are you pulling bolt to eject loaded rounds? I am wanting to run Single shot so magazine is not a issue.

    Thanks for the replies.
     
  2. J E Custom

    J E Custom Well-Known Member

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    Jul 29, 2004
    I prefer .300 down to .200 free bore because it allows me to load hotter and lowers pressure
    to achieve the velocity I want.

    Standard free bore for a 338 RUM is .160 but it was not intended to shoot the 300 grain bullets.

    Just my opinion

    J E CUSTOM
     

  3. sixtwoeightyfour

    sixtwoeightyfour Member

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    Thanks,

    What OAL of the berger and Match Kings are you running?
     
  4. cuutter

    cuutter Well-Known Member

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    Dave at PTG set me up with .148 FB. I load to 3.768". It feeds with the extended mag box from Brownells and this thing is a hammer.

    Wayne
     
  5. J E Custom

    J E Custom Well-Known Member

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    I set up all of my rifles to max mag length that the action will take -.020 and don't worry about
    specific bullet to land clearance, and find with proper load testing I can reduce group size
    to below 2/10ths MOA or better and still run Max powder charges without encountering max
    pressure.

    Chamber and head space "Must" be minimum dimension for this to work but it can be done.

    I find that Freebore and bullet jump can give me a very accurate and forgiving rifle that
    does not tax the action in order to get velocity.

    I am experimenting with a wildcat (Of my own design) and have already gone 6 grains over
    the max listed load of Retumbo for an Edge with no heavy bolt lift or primer flattening. My free bore
    in this chambering is .320 and all loads are just under 3.90 COAL.

    I do adjust the COAL slightly to achieve the best accuracy but i never exceed the max mag
    length.

    It is Just the way I set up my hunting rifles.

    J E CUSTOM
     
  6. Lost creek

    Lost creek Well-Known Member

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    Jul 20, 2007
    I have 2 338 edge's. Shawn Carlock built my first one and it is set up for .050 freebore with a 300 gr. SMK. My second is a heavy bench gun and i have the same bullet about .005 off the lands and am using 2 grs. more powder. I no pressure problems and can see no difference at all between them. I am using a 9.3 twist in my heavy gun and a 10 twist in my other.