Well it's important to keep in mind that it's a .45 frame attached to a Mech-Tech CCU. Basically it's a short carbine that fires .45ACP rounds. So far I've only plugged a couple of smaller 300+/-lb. pigs with it. I use Golden Sabers for pig hunting. They work great. Turns 'em off in a messy hurry. Though I imagine you could use just about any ammo in that thing and it would work fine. The great aspects of that setup are that there is almost no kick what so ever and it's semi-auto so you can put multiple shots in a tight grouping really fast. It feels just like firing a .22 rifle and the red dot I have on it is right on the money. I practice with that setup a lot when I go to the indoor range. I use the half dollar sized shoot 'n see target stickers. I'll empty a 10rd mag and every round hits that sticker at a rate of about two shots per second. That range is about 25 yards deep. It is a GREAT weapon. I put that thing together back in 2002 and have recommended them ever since.