I decided that I didnt want to lug a rifle around on a track, but needed something substantial to finish one off in case we have to. I decided on the 10mm Glock long slide. I have a custom chest holster for it and typically shoot 180grain or 200grain JHP. Just got some more rounds from Sig Sauer and they seem to pack a punch as well. Its got some kick to it so no holding it gangsta style LOL, but its accurate and usually ends the track in one shot.