Does .357 SIG use .355" bullets or .357" ?

[Tang419]

I noticed in a Natchez catalog, they have some 158gr Speer Gold Dots ;P , but that might just be for the .357 Magnum. I bet a .357 SIG will still push that around 1000fps.

[G21FAN]

.355. A 9mm projectile in a necked case.

[Tang419]

I knew it was a 9mm in a .40 Brass. I was just hoping those would work.

Do you really think a 147gr would have superior results to the 125gr ?

[SIGShooter]

It would probably penetrate a bit deeper. The Hornady XTP rounds I was using were getting around 1300 FPS out of the 31 and 1275 out of the 32. As far as superior results, I think the best round on the market is the GDHP. IMO. You do your job and not matter what round you use it will do its job

[Uncle Don]

158 is too large but if you load .357 bullets and drop into the chamber of your gun without the neck pinching - you're good to go.