Berger's claim that they penetrate a few inches before grenading in my experience is legit...
This is a picture of the backside of an Antelope scapula, you can see the hole at the tip of the knife. This was from a 240 Wby with a 115 vld , muzzle velocity 3150 fps.
Distance shot, approximately 250 yds.
Antelope dropped on the spot... zero ruined meat
I was impressed