I had the same issue with them out of the creedmoor with the 156. I lost a NICE buck, 100 yd easy shot. It should have taken the whole vital cavity out with it. Deer stood up on back feet and almost went over backwards. Ran into the swamp never to be seen again. 20 minutes later I smacked a doe the same way, she ran off too. I found her in a ditch she fell in and was not able to get back up. No exit, no blood, and the bullet striped the jacket and retained next to no weight. 100% confident I hit the buck, the gun is a tach driver, the shot was stable and plenty of light.