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Old December 3, 2012, 10:29 PM   #30
44 AMP
Join Date: March 11, 2006
Location: Upper US
Posts: 13,900
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.
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