M1 Carbine in .357 Magnum? - Shooting Sports Forum

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Old 09-12-2020, 11:39   #1
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M1 Carbine in .357 Magnum?

Does anyone know if anyone sells the M1 Carbine platform in .357 Magnum...or if anyone has ever done a conversion? It looks doable to me, and it would be pretty cool to own and shoot one. I would definitely buy one to add to my gun safe.

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Old 09-13-2020, 10:18   #2
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Old 09-26-2020, 10:11   #3
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"A lot of people have tried, none successful." Yup. Feeding issues, and bolt issues. I do have a Universal M-1 carbine in 357. It started out as a 256 Win Mag, which is a 357 case necked down to 25 caliber. It is a one off, done By Robert Snapp of MI. He was a very renowned single shot gunsmith in the 60s, 70s, and 80s. He took on this project as a challenge. As he told me, he enjoyed the challenge, and is glad that he did it, but he wouldn't do another one! Ever! Period! He did this about 35-40 years ago.

It was very problematic because, as it turned out, the case didn't head space on the rim, but rather the shoulder. Ream out the chamber and the shoulder is gone. Snapp fixed the issue by installing a hardened pin, horizontally, in the chamber, .The gun now head spaces on that pin. Gun functions 100%, but I have only one 5 round magazine, and have been unable to find any more. It is plastic, so fabrication of more mags is prohibitively expensive, IF anyone would even be willing to try.

I also have a M-1 carbine in 9mm Win Mag that functions 98%, but try and find ammo these days. It was made about 35 years ago.
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