Ive shot a good deal of deer with powerbelts and can say, ive never found a pile of hair. Just a lot of blood and dead deer within a short distance. I used to shoot 80gr 3f t7 in a .45 with the 225gr aerotip and that sucker leaves a blood trail!! A 295 AT with 90gr RS shot into a doe at around 75 yards on a trot, dropped her in her tracks.

I'd take that rifle to the range and double check it. It really sounds like 1: Your are either over shooting it or 2: you are under shooting it.