Case size between 408 and BMG?

Discussion in 'Rifles, Bullets, Barrels & Ballistics' started by Karl, Feb 10, 2011.

  1. Karl

    Karl Member

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    Hi does anyone know if there a previously manufactured case between cheytac and BMG case size? A couple of us are looking at an option to create a faster 458 off, yet stay away from BMG sized actions.
     
    Last edited: Feb 10, 2011
  2. RDM416

    RDM416 Well-Known Member

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    I think I saw a picture a while back of a BMG, 408 and 416 Barrett. If memory serves me correctly the 416 Barrett has a larger case than the 408 but is still quite a bit smaller than the BMG.
     

  3. Booney

    Booney Well-Known Member

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    408 is = to 159 gr and the 416 has 200. I can't remember the BMG capacity.
     
  4. eddybo

    eddybo Well-Known Member

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    Here is a pic of a 416 barret next to a 338AM and some other assorted brass cant recall what I stuck up there with comparison. I got a 375/416 Barret Improved reamer, a barrel, a .50 Mcmillan action and stock, and a couple hundred pieces of brass, if your interested. I have been having health problems for a while and have sorta lost interest. I prolly have a couple hundred rocky mountain bullets out in the shop somewhere.


    [​IMG]
     
  5. LR3

    LR3 Well-Known Member

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    Another option is .577 tyranosaurs case . See A square or Dave Viers , snipetac websites. Dave is also working on .458 as also Kirby I believe. There were some posts recently.
     
  6. eddybo

    eddybo Well-Known Member

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    I am thinking that you are not going to get much better than a 375 CT derivative alla Viers or Allen.
     
  7. nitrousmudbogger

    nitrousmudbogger Well-Known Member

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    Seems to me all there is is some various nitro express stuff like 600 and 700 but I think they are just lathe turned cases and prolly not what you are looking for in this scenario. Kinda looks like a 45-70 case only huge
    50bmg, 416barrett, 460styer all the same case just necked down and shorter various amounts from the bmg case
    408 and all variations is a 505 gibbs case
    most barrel makers are limited in the 458 to what they can do might check to make sure your twist is available before getting too deep.
    Ive looked into the 460 styer which is pretty cool but a pain to get anything in the country
     
  8. J E Custom

    J E Custom Well-Known Member

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    The 450 Rigby is a very large case and will exceed the 458 Winchesters energy and velocity
    and has a bolt face dia. of .589.

    The 500 Gibbs is a large rebated rim case with a bolt face dia. of .575.

    The 505 Gibbs/ Cheytac case uses a larger case head .635 and normally requires a custom
    action like many other big dangerous game cartridges.

    The 416 Barret is simply a 50 BMG case shortened and necked down to hold 200+ grains of
    powder the 50 BMG holds 250+ with a bolt head dia . of .804 and requires a special action

    There are some cartriges that hold more powder than the 505 case but they all have a large
    case head and require a large custom action.

    J E CUSTOM