I use a 270 AM w/150gr Nosler Ballistic Tips @ 3500. Good practice for big game except I switch to 169.5 WC. Different clicks and a lot less windage problems.
Ironworker, in my experience the only problem with the J-dam is the time delay between seeing the P dog colony and killing the dog. Those jets sure take a long time to scramble and get to altitude. But at least the rounds per kill ratio is very low