Folks looking for input. I've read through a lot of the posts and still not clear on the weight of arrows. Jesse had a post that said that a 20" Easton Headhunter that comes with the crossbow weigh 310 grains without the field tip. I was almost sure that I also read he mentionend they were 13.8 gpi which would give a 20 inch shaft a weight of 276 grns. I think I've also seen that the Headhunter shaft was 10.5 gpi. Anyone know which it is? If I assume 8 grn for a vane X 3 vanes = 24 grns. Add 12 grns for a nock and 57 grns for aluminum insert and a bit of glue, I calculate the bolt should weigh 374 grns using the 13.8 gpi or 308 using the 10.5 gpi. So, does anyone know if the bolts are 13.8 or 10.5? Thanks for the input.