In the past I have been quite satisfied with the 120 grain Nosler Ballistic Tip as a deer load in my 6.5x55 but am now re-thinking that. All shots int the past have been pretty much direct broadside at 100 yards or so. Performance has been perfect, with exit wounds of golf ball size. This year was different. I took a doe on an angling away shot at about 50 yards. I held far back on the rib cage to angle toward the off side shoulder. She ran about 15-20 yards and collapsed as expected. When I walked up I thought "wow, what a huge exit". It was an oval the size of a goose egg, but wait, that was the ENTRANCE WOUND!!. There was an exit in the shoulder which looked more like an entrance, I had to think about it a while to be sure which was which.
Then the wife's deer, a button buck, was a straight on frontal shot also about 50 yards. The entrance looked normal, just off center of the upper rig cage. There were several small exits from one side of the rig cage indication where fragments had exited. With the downward angle the shot passed above the heart, pulped the lungs and blew away half the liver. I found a fragment of jacket inside a ventricle of the heart which had not been punctured. Apparently that fragment had entered the heart through one of the blood vessels.
These BT's were loaded to about 2800 fps and while I have taken quite a few deer with them in the past, this season's results were a bit more explosive than I like. They did kill and kill quickly but I have to think that if larger bones had been encountered the results may have not been so good. I still feel that 120 grains is enough for deer and antelope but the BT's are a bit explosive. I'm now ready to start working with the Hornady 129 grain.