6mm - yes, I did have the RAV feature turned on. It has worked really well, so far. Set it and forget it. Just to clarify, unfortunately I was not able to collect the Red dog. My guess is he is still way, way up under that root ball, dead by now. If he survived the shot based on the amount of blood, it would be a miracle.
DU - the cross hair or red dot, was placed on his chest more towards his right side than centered. I believe the bullet may have hit high on his right leg. My guess is the bullet is dropping low again, so I am going to target check it this weekend.
Gosh, that dog has been around that site all winter with me. We had quite the cat -n-mouse game going all season. Feel awful it ended the way it did....I think wounding an animal you can't recover is by far the hardest part of hunting, you have to swallow. Hughhhh.