[ajloeffl]

Have you seen the type of hands he likes to call your PF raises with (ie a couple showdowns)? Or you can guess based on how often he does call. If it's like 40% of the time then it could be basically anytime he doesn't have a pure garbage hand. If so, his range could have 89, 76, A7s, K7s, 88, 99, set, total bluff with KT on flop gone luckbox, etc. Calling so much of your stack on the turn should only be done if he is going to play pretty straightforward on the river. If you are still left guessing as to whether or not he has a hand when he puts a big bet out on the river...