I have one too. I agree with you that they tend to jam...I blame the poor quality of the magazines more than anything. Don't load them to capacity...it helps.
I've killed white-tail deer (with one shot)at ranges under a hundred yards. Try that with a M1911.
I could do it. Would it be my first choice? No. But in an emergency I could do it with a .22LR. Heck the greatest of the original Great White Hunters on the African continent in the late 19th century was a guy named Karamojo Bell. He regularly took elephant with a 6mm. That's a .243 folks. Shot 'em right thru the eye everytime. The importance of shot placement is shown once again.