Re: Tuning Broadheads
Carbon arrows are never made to accept any type of heat, so unless you're prepared to ruin a few good arrows forget the idea of heating carbon shafts.
Aluminum shafts can safely be heated and that's why Hot Ferrule Cement made by companies like Easton or Bohning have been used for years with aluminum arrows. Carbon shafts generally bond the inserts with a good standard set Epoxy Cement. This is so the inserts are not able to be removed or rotated.
Rotation is always achieved by using rubberized o-ring style washers. They are sold by the bag and are very cheap. With a crossbow you'll find that tuning your broadheads is slightly different than with a compound bow. Aligning your broadheads with your vanes is only the starting point. You'll need to continue adjusting the broadhead to different clock positions until you find the one that flies the straightest at both long and short distances.
I typically start at 20 yards and continue rotating my broadhead from the 12:00 position, then the 1:00 position, ten 2:00 and so on until I find which position my arrows have no right or left movement. Once I have it dead on target at 20 yards, I move back to 40 yards and perform the same test. Once good at 40 yards, I move to 60 and then 80 yards.
Yes, I'm shooting a TAC15i and each time I change to a different broadhead the tuning process starts all over from the beginning.
This is not the case with mechanical heads. A good mechanical head requires no tuning and should shoot exactly like a field point of equal weight. For any type of very long distance hunting shots its very important to weigh each arrow and weigh each broadhead to match you heads to balance out slight weight differences between your broadheads. I also use three different weight broadhead washers that are available from Bowhunters or other archery shops.
One is a synthetic washer, one is an aluminum washer and the last is a steel washer. Each of these washers weigh a slightly different amount when weighed on a grain scale. By using different combinations you can balance all your arrows to weigh the same. Always start with your heaviest shaft first and add the least amount of weight as possible. You can always add weight to a shaft, but you can't reduce the weight, so that's why you begin with your heaviest and bring all others to this weight.