Well, managed a few shots today. I had full length carbon shafts in sizes 400, 340 and 300. Each had a 75gr brass glue in adapter filled with lead for an adapter weight of 145gr. Each also had a glue on field point -400 had 145gr, 340 had 160gr and
300 had 190gr. These where bare shafts without fletching. Dynamic spine seemed similar for each. At 10 yards all flew straight, thanks to the high FOC balance. Considering they were all between 9 and 10 gpp, the apparent speed was very impressive. My perception was that they shot with more authority than my 70lb Hill longbow at 28". Draw weight with the Hwarang at 32" ATA was about 65lbs.
Just for fun I also has some hickory shafts spined 70-75 that I use with the longbow. At 31 1/2" BOP and again with heads of 145, 160 and 190 overall mass was between 850 and 900gr. Unfortunately the thread wrap I put over the leading edge of the fletching struck the arrow pass quite severely to the point where I will have to replace it - that's what happens when you rush while making arrows. Anyways, they flew poorly because of hard contact with the arrow pass but they flew with impressive apparent speed considering it was 14 gpp or so.
The thumbring I am using will need more work and I will need to work on extending my draw length to get the last inch but the results of the initial preliminary test were quite gratifying.
Kanuck