RE: How many of you shoot until it drops?
People over look the shock value. Blood loss is only one variable in the equation. Animals hit by highpower firearms also experience a great deal of traumafrom shock. Thats why some animals drop in their tracks when hit in non-CNS areas. Those animals haven't bled out, therewasn't enough time. Thats why larger bullets tends to kill faster, more energy displaced = more trauma/shock. Thatsanother reason for follow up shots.
OBTW if a animal goes straight down at the first shot the best thing to do is to cycle the bolt and get back on target so a follow up can be taken if needed. You can celebrate later. Too much game is lost due to people looking over their scopes instead of through them. JMHO