Be very serious about sorting arrow/broadhead combinations right away. I have had phenomenal accuracy with Phat Head broadheads when shooting thw same arrow repeatedly for groups. But -- when I started shooting multiple arrows with broadheads my groups opened up so much I thought something was wrong with my shooting or with the bow itself. Of course, much of the confusion and disappointment was because we are dealing with such an amazingly accurate crossbow and our expectations are about a mile high. Remember, using the same arrow and broadhead I have been getting 1 to 2 inch two-shot groups out to 100 yards. Prior to culling, I have seen 5 and 7 inch five-shot groups at 50 yards. (Again, can you imagine the hubris to be complaining about that kind of accuracy ) Once I conceded that the arrow/broadhead combo is not going to give us good groups with multiple arrows without serious culling I made quick progress. I think the key is to cull at 30 to 50 yards where you are not as likely to loose arrows. If I were starting over, I would still buy Phat Heads for sure. If I were serious about it I would buy not less than a dozen Phat Heads to get me started. I would attach them to 12 arrows right away and start shooting all of them for groups. Number the arrows and keep track of the POI of each shot with each arrow. Quickly eliminate any that shot poorly at these close distances. Then move out to more serious ranges with those that grouped together at, say, 50 yards. I now have 5 arrows that are good out to 80 yards. Four of the 5 gave me a 4 inch vertical this morning and horizontal was 5 inches. I'll try these same 5 tomorrow am out to 100 yards and maybe further if the wind is low enough.