Something doesn't seem right. I've shot a lot of deer with bows ranging in poundage from 60 to 66 lbs. Arrow speed from 215 fps to 275 fps. Arrow weight from 400 gr to 560 gr. Unless the shot was extreme quartering away or a spine or shoulder blade hit, all have been pass throughs. I've never tried a mechanical broadhead. Do you think that this could be the difference?