Who can rechamber 9mm to .357 SIG?

gcw16 · Jul 27, 2016

I have a CZ SP-01 barrel in 9mm that I would like to get rechambered to .357 SIG. In the SP-01 series, the 9mm and .40 barrels have the same external dimensions so the 9mm barrel can be rechambered and used in a .40 pistol. Anybody know someone who can do this for me?

Broker50 · Jul 27, 2016

You do know that 40S&W (357 Sig) & 9MM breechfaces are different, don't you? While 357 Sig may work with a 9MM slide, I wouldn't trust it for serious purpose.

hardluk1 · Jul 27, 2016

Probably no one if they and honest gunsmith . Sell the sp-01 and buy a handgun in a different cartridge . If 357sigs not in the cz line up then a 40sw ammo from underwood BB or Georgia arms . 135gr 40sw at 1400+ from a 4" barrels fps nothing to sneeze at .

gcw16 · Jul 27, 2016

The barrel would be installed in a .40 gun so there is no problem with the breech face or slide. Several people have done this conversion and it works just fine.

judgedelta · Jul 28, 2016

I never considered the 9mm and .40 breechfaces being different. The Storm Lake 9mm barrel works fine in my Glock 23....

Who can rechamber 9mm to .357 SIG?

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