For those interested I shot this bear on 5/20/11 with a 338 RUM and a 225 gr. AB. He had a live weight of 335 lbs. The first shot , from 40 yards entered beside the backbone and exited behind the front shoulder a bit high. He went down rolled around a bit then got up and staggered off. I could see a huge hole in his off side. Even though he wasn't going anywhere I put another in him from behind . I never did find the entrance hole for that shot but I found the bullet on in the opposite shoulder from the exit hole. The bullet weighed 132.2 grs. that's about 59% weight retention.