I recently purchased a G33 barrel for my G27. My reason for wanting 357 Sig was basically because I wanted to reduce the weight of ammo I carry. I usually carry one spare mag in my cargo pants pocket, and when it is full of 180 grain 40's it is just heavy enough that it annoyingly thumps against my leg when I walk. The weight of the G27 when full of 180's also pulls my belt down a little bit even with a crossbreed supertuck. The 357 Sig also seems to have just the right amount of spunk that I feel confident that it will be effective coming out of this subcompact gun. The more I read about this cartridge, the more I like it. I've also found that Georgia Arms has a reasonable price on practice ammo. I think this a going to be solution to the weight issue and a nice carry package.