220 swift/6mm

Discussion in 'Rifles, Bullets, Barrels & Ballistics' started by huntokanogan, Apr 19, 2011.

  1. huntokanogan

    huntokanogan Well-Known Member

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    So heres a question thats been in my mind for a while. Has anyone necked up a 220 swift to take a 243 bullet? Or would you petty much just be making a very expensive 6mm rem.?
    The 220 swift is maybe even harder to find brass for than the 6mm. It was just a thought I had. Not looking to build one, just was curious.
     
  2. KRP

    KRP Well-Known Member

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    That's where it started at, the 6mm Navy was the basis for the Swift.
     

  3. backwoods83

    backwoods83 Well-Known Member

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    Yeah just like was stated it was originally designed as a 6mm Lee Navy cartridge designed to be efficient in a short barreled navy carry rifle, didn't pan out, it was wildcatted as 22x6mm navy, adopted by Winchester and named the 220 swift. I would imagine in a 24-26" barrel its performance would be similar to a 6xc but harder on barrels.
     
  4. shortgrass

    shortgrass Well-Known Member

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    6mm x .220 Swift,,,,,,,,,,,, an oldie but goodie fro the early '50s, known then as .240 Cobra! Although, it uses a 'blown-out' (kinda' Ackleyfied) Swift case. Nothin' new here!
     
    Last edited: Apr 19, 2011