Ya it was kind of weird but sometimes bullets do weird things. I didn't notice it fragmenting inside but did not recover the bullet either. It was somewhere in the back rump somewhere and didn't try to find it. Was more worried about skinning it and getting it cooled down. I used the same bullet on a bobcat several seasons back to and it blew through the cat broadside and left the same diameter hole on the exit as it did the entrance. Plus a small little hole from a rib fracture poking through. Flipped it on it back. Cool to see the vapor trail from a long shot go into a animal like that. Can't believe I smoked it at 458 yards. My longest shot at an animal by far.right behind the shoulder.
I guess you can tell I like hunting with a 270.
Lately I switched to the 140 Berger vld bullets for deer but want to try them on a yotie to see the reaction of them on small game.
But I always will go back to the Sierra 90 gr hollow points. Awesome load for varmints.