For deer, I like to build my arrows so I get the speed I want to hunt with. For me, that's a medium weight arrow in the 280-300fps range. I feel like arrows in that speed range are fairly forgiving, for both fixed and mechanical heads. With my setup, that allows me to shoot an arrow in the 420-440gr range, which is plenty heave enough for deer sized animals.
I'm shooting GT Velocity 300's with 20 gr of weight added to the back of a standard insert. I do this so I can shoot 125gr heads with that setup, or I build them with 50gr inserts and shoot 100gr heads, and have two different weight heads give me a shaft that weighs 5 gr difference.
There's tons of good shafts out there, that's the best part.
Kris I think our logic is pretty close to the same. I'll check into what you're saying.
The easiest way to do it is to first figure out what spine you need. You probably need a 340 or 350, unless you're shooting a very fast bow, then a 300 might be needed. Then know what all the components that make up an arrow weigh. As a rule of thumb, this is what I go by:
Point(pick one) 100-125gr
insert 10gr
vanes (I use blazers 6gr each) 18gr
wrap 5gr
nock 10gr(lighted 20gr)
glue 5gr
shaft gpi X length of shaft
------------------------
= total weight
Check out Black Eagle Deep Impacts. They're a micro diameter shaft with decent weight. You can get very good FOC if you use a heavy outsert with them. With your setup you'd probably need a .300 if you planned on having a lot of weight up front. I can guarantee you that almost every one of your shots will be pass throughs. They hit like a freight train. The only negative to the FMJ is that they will bend and that can hurt accuracy
I dont plan on switching from my FMJ's unless they stop making them!
I cant tell you what spine arrow I have, but, at 28.5" length, and 64 pound draw, I am getting 305 fps with a 100 grain head. The guy who made my arrows did some math and figured that I had enough kinetic energy to get a pass through on a bull elk at 20 yards, something like 93 ft/lbs of energy. I use a rage 2 blade broadhead, and the only non pass through I have had went through the shoulder blade on the near side, and stuck in the joint between the shoulder blade and leg on the far side. That deer went about 60 feet and was dead. I have had a pass through on a medium sized doe where the entrance was where the brown hair and white hair meet at the rump, and the exit was the opposite front shoulder. It went nearly end to end and still stuck a couple inches in the dirt. (i flinched on the shot, and it was hard quartered away. still only ran about 80 yards)
What weight are you trying to shoot?
I use Easton Hexx shafts w/ 50gr brass inserts, 125gr heads & total weight is 435gr.