Mule Deer's confidence in the early 140 grain 7mm ballistic tips surprises me because I had the opposite experience. I shot a doe mule deer at about 40 yards with a 140 BT out of a 7mm-08. That bullet blew up on the shoulder and made a huge entrance wound with no exit. The doe died but it did run about 75 yards first. Too much meat damage for me and I went back to partitions.