I have seen the M1 carbine rebarreled to shoot a rimless version of the .38/40 WCF cartridge, and it would fire a 200-grain bullet at 2200 FPS MV with improved accuracy. Your idea is not too bad! You could probably convert one to the 7.62X39mm, or to the .308X1.5" Barnes.....

Marty.... I have a 38/45 reamer...

Here's something else a little loony to do with an M1 Carb. I got ahold of one that had been mangled in an effort to customize it, so I decided to play a bit. I ordered a 1 in 8 barrel blank and machined it to fit, leaving it at 161/4" in length. I started loading some 220gr smk's for it with 12gr of 4227 behind it. I get roughly the same performance as the 300/221 whisper in my safe. Most importantly, I am getting repeatable 2" groups at 300m, at about 1050fps. I had a hankerin' for another useless subsonic gun I guess.

Just wondering, can the 30 carbine take the pressure of a short 308? I recall in some old Guns & Ammo or Shooting Times rags an article about a 5.7 (?) Johnson. Anyone else? When my daughter moves out at the end of the month, I might be able to access them and post the specs.

LeRoy

http://www.thegunzone.com/carbine-wildcat.html

WC

[quoteNow, the 38/45 itself, in the Grease Gun, there is another thought ....

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If it'll work in a Grease Gun mag, it'll work on an AR-15 platform, the new Cav Arms lowers are wide enough to accept the mags, and there are several companies working on .45 ACP uppers and mag blocks.