My go to is a Glock 20. It's light and easy to carry, in a chest rig it's almost non existent so I know I'll carry it all the time unlike I would with larger handguns/cannons. 150% reliable every time and I can drop my 22lr slide on it for grouse/ptarmigan at camp. I recently converted a 1911 to 460 Rowland and have been carrying that occasionally.