I can't say I've ever "tested them".
ButI did blow one through the buck in my avatar.
The arrow diced right through him like light through air.
There was a nice big nasty blood shot spray pattern left on the ground from behind where he was hit like a good gun shot would do. The blood trail was one of the best I've followed.
I was hunting from the ground and hit him in the middle of the lung facing me and it exited high in the off side lung (13 yard shot), so he did go a fair distance (80-150 at night, who really knows) but the blood never ceased to pour until he was laying on the last puddle
.
These are the headsI prefer to shoot, deadly for sure.
BTW, I believe 5 shot has tested them.