If I could have only one type cartridge it would be the .45 Colt. Load it heavy or load it light and anywhere in between. Perfect for action shooting, hunting and self-defense especially when topped off with a 300 gr. hollow point in front of a hefty load of Universal. It makes a good rifle round when out there in the brush huntin’ hog. Only one drawback, if you shoot a lot you need to be reloadin’. It ain’t a cheap round.