I tested crossbow arrows.I used an Excalibur Exocet 200 for testing and 2 people shot the bow.Arrows tested were Firebolts,GT2 Laser Gold tips and Victory.Based on testing you can throw away any Firebolts you own.I have no idea how Excalibur tested and recommends them.To the point here GT's flew okay but the tightest groups were by far with Victory arrows with 2" vanes.I tried them with 4" vanes and lost a 1/4" at all ranges which happens to be 20-30 and 40 yards verified with a quality laser range finder.If I had Gt arrows already I would keep them.The Victory arrow would be the best to replace them with.The Victory arrows hit directly where intended the Gt arrows were off but may still kill a deer.If anyone wants my Firebolts pay the shipping and they are yours.I'm going to get some Victory arrows with 2" vanes.The accuracy of the Victory trumps the other 2 I tested.As a side note the GT's don't hit to point of aim at 40 yards.They were low and that was unexpected.The Victory arrows grouped at 1 3/8" at 40 yards.That works for me.