I use almost the same set up. Loose the collar. Not necessary, as the first 11" of those shafts are internally footed. You will not break them. Trust me, I try all the time. Ted Fry from Raptor archery had some to do with the development of the Hammerheads. He is a wealth of knowledge regarding them. Contact him and he will square you away.
I also agree to cut them to 30" BOP. Mine are 30" BOP, Standard insert, G nock adapter, 4x4" fletch. Without a field tip, they come in right at 400gr. For my #50 bow I use 145gr tips with great results. They also shoot well with up to 200gr tips.
Great arrows. I use them in center cut bows from #38-#50