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220 swift/6mm

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Unread 04-19-2011, 03:51 AM
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Join Date: Mar 2011
Location: Washington state
Posts: 105
220 swift/6mm

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.
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    Unread 04-19-2011, 01:09 PM
    KRP KRP is offline
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    Join Date: Dec 2007
    Location: Kuna, ID
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    Re: 220 swift/6mm

    That's where it started at, the 6mm Navy was the basis for the Swift.
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    Unread 04-19-2011, 03:07 PM
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    Join Date: Jan 2011
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    Re: 220 swift/6mm

    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.
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    Unread 04-19-2011, 06:45 PM
    Join Date: Mar 2010
    Location: on the Southern Plains
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    Re: 220 swift/6mm

    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!
    "Shoots real good!": definition; it didn't blow-up in my face. 1993 graduate Montgomery Community College 2yr. gunsmithing program

    Last edited by shortgrass; 04-19-2011 at 07:47 PM.
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