I use Parker (black ones) or Easton Power bolts with the Slick Trick 175 Grain Crossbow broadhead. I shoot deer pretty much at any angle. Dose not matter if he is quartering to me, straight on in the chest, head down between the shoulder blades, the 175 gr head penetrates far enough. Shot a buck last year quartering to me and the bolt completely passed thru exiting the opposite hind quarter. I am currently using a Parker Buck Buster 175. Now if you are new to hunting and especially archery hunting stick to the broadside and quartering away shots. I know my equipment and what shots I can take and shots not to take.