The Firing Line Forums - View Single Post - Why did they go with the 9mm bullets in the 357 sig?

**44 AMP** · December 3, 2012, 10:29 PM

Why go with the .355/.356" rather than the .357/.358" for the .357 Sig?

I can't claim my crystal ball has access to what was in the designer's minds, BUT, from a loading/reloading standpoint most of the 125gr .357 bullets have a fair amount exposed lead, fine for a revolver, but prone to giving problems in autos.

And since the .357 Sig was intended to be a one trick pony (and do that trick well), using a 9mm diameter bullet with a profile optimized for autoloader use just makes more sense to me.

December 3, 2012, 10:29 PM	#30
44 AMP Staff Join Date: March 11, 2006 Location: Upper US Posts: 28,833	Why go with the .355/.356" rather than the .357/.358" for the .357 Sig? I can't claim my crystal ball has access to what was in the designer's minds, BUT, from a loading/reloading standpoint most of the 125gr .357 bullets have a fair amount exposed lead, fine for a revolver, but prone to giving problems in autos. And since the .357 Sig was intended to be a one trick pony (and do that trick well), using a 9mm diameter bullet with a profile optimized for autoloader use just makes more sense to me. __________________ All else being equal (and it almost never is) bigger bullets tend to work better.