Nothing impacts a target like a full house 10mm load. Most commercial ammo is waaay short of this.

Get a G20 and you have the best of both worlds. Power that can not be doubled in a carry rig, and spare ammo like a little cartridge.

Rememeber the origins of the FBI and S&W making the 10mm. It was designed from the ground up as the best defense handgun cartridge ever. Some people have small paws and can't handle the recoil, hense was born the .40S&W or 10mm short.