The first shot is the most importent, but instead of a follow up shot I like the bar because it allows me a quick second shot on another animal. Quite often moose and deer travel in groups,(we can party hunt for big game here) the bar allows me to take two "first shots" quickly. For the ultimate in non moving parts you can't beat a single shot, I don't see to many in the field. Bolts,levers,pumps, and semis are the hunters choices probably in that order.