Heat! More heat!! Burn out the pain...

Voice of exasperance (don't tell me there's no such word. has to be one) speaking. Bet those seats made you hang on your left cheek, betcha. You've got uneven assitis. It will pass with enough heat and tablets. I recommend aspirin.

In my limited experience, I got the best groups out of a .45 single handed (I've always been better that way for some odd reason) is to actually grip the gun with the first joints of the thumb and index, with only a light wrap with the fingers, tight in the web, trigger in the last index joint. The little finger almost floats on the grips.

You know what those groups of yours look like to me?

Dead men. Sufficient.