I can't imagine anything more destructive to tissue than a broad head. Adding a bullet to an arrow doesn't make sense to me and reminds me of the crap exotic 12 gauge ammo that is sold on the market. When I was working as a diver, we used bang sticks that had a .38 blank at the end that was quite effective against sharks and I also used it a few times to remove stubborn boat propellers. The bang stick only works under water because the water pressure acted like a chamber. A bullet at the end of an arrow without a chamber or barrel doesn’t seem like it would do much. A broad head makes a big hole and lets lots of blood out, you don’t survive that. Down here on the border I assisted the local sheriff’s deputy on a call to a domestic dispute between two neighbors and by the time we got there it was a homicide. One neighbor shot the other with a crossbow and the victim was DOA with a softball size hole cut in his gut and lots of blood on the ground. Mental note to myself, never got shot with an arrow.