Great info guys and all much appreciated. The first one I shot that ran off really had me second guessing my zero and the next night I double checked and verified it. Had be boggled cause in general I'm a good shot. (I practice, train, instruct, and compete a lot)
After last night I was totally floored as to how it ran off. I was out searching the area with the thermal imaging cause I knew it had to be there but never found it. I mean crap, I saw the impact on the animal. So I was starting to wonder what was up.
I'm giving it a break tonight, just too tired, but will go back out tomorrow night or so and take all the advice given. Will report back.
(Just FYI, I have been hitting it hard all week cause we spotted what we believe to be a cougar in close a week ago and that doesn't sit well with me. My kids play outside 20 yards from where it was spotted, not to mention the dogs and such. I'd love to come across that cat one night.)