Question about the 50 BMG case size

Discussion in 'Rifles, Bullets, Barrels & Ballistics' started by Guest, Jun 24, 2004.

  1. Guest

    Guest Guest

    Any of you guys know the diameter of the case head and at the shoulder?

    I'm tryiong to figure out a formula so all info would be great
     
  2. Dave King

    Dave King Well-Known Member

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    I don't have the exact measurements but I know it's just a big 30-06 case. 5/3rd's a 30-06. I was looking for a 4/3rd's 30-06 case several years back for a wildcat I was thinking on and came across the 505 Gibbs case (needs necked down to be a true 4/3rd's) followed immediately by the 408 CheyTac.
     

  3. kidcoltoutlaw

    kidcoltoutlaw Well-Known Member

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    i have one i will check and get back with you on it.its at my reloading cabin,thanks,keith
     
  4. Guest

    Guest Guest

    The case head = 0.804" (Handloader mag)
    The shoulder = 0.714" (Handloader mag)

    The reference to the BMG size by proportion is 144% larger than the 30-06 Springfield.

    Regards.
     
  5. kidcoltoutlaw

    kidcoltoutlaw Well-Known Member

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    the case i checked was .800 and .710
     
  6. Fiftydriver

    Fiftydriver <strong>Official LRH Sponsor</strong>

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    My PMC match prepped brass that has been once fired and neck sized measures:

    Rim: 0.801"

    Head: 0.798"

    Shoulder: 0.715"

    Milsurplus will vary much more then PMC or IMI brass which is why I use this for my extreme range match loads in the 50 BMG.

    Good Shooting!!!

    Kirby Allen(50)