They have been known to adsorb a lot of punishment.
I would just plant them on the ground as often as you can.
A TP&W game biologist helped us gut a hog we had killed on the Aransas refuge. He found a broadhead with a piece of the shaft in one of the hogs lungs when he broke it open and said the tissue surrounding the broadhead was healing. This was after the archery hunt 2 weeks previously. After seeing that I wouldn't bet the farm on what the OP is trying to do.
