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6mm Rem. forming brass

Discussion in 'Handloading and Reloading' started by gamestalker, Mar 8, 2013.

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  1. gamestalker

    gamestalker member

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    Can .243 brass be formed to work in 6mm Rem. (244). I know the .243 is a smaller case than 6mm is, but can it be fire formed?
    GS
     
  2. HOOfan_1

    HOOfan_1 Member

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    No, the 6mm Remington is based off of the 57mm Mauser case. I am not even sure .243 would chamber (I hope it wouldn't) you would have some sort of case failure I would think.
     
  3. rcmodel

    rcmodel Member in memoriam

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    No.

    When formed, the 6mm Rem case is already .188" longer then a .243 Win on it's best day of excess case stretch.

    rc
     
  4. gamestalker

    gamestalker member

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    Well, thanks, there goes that idea out the window. I guess I'll just have to use 6mm brass instead.
    GS
     
  5. cag215

    cag215 Member

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    It's common for people to use 270 and 30-06 to form 7x57 & 8x57.....the 6mm rem is also a 6x57. I don't know how hard it would be to trim and reform.
    Food for thought, the 257 Roberts is also a 6.5x57......
     
  6. GT1

    GT1 Member

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    ^ yup

    My manual of cartridge conversions states to use .270 brass to convert to 6mm Rem.
     
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