Well after I get paid again I'm going to use the money to get another dozen arrows. I want to get Easton FMJs. Choosing which spine and all that stuff confuses me. So if you guys could help me that'd be great:D. I'll be shooting a Hoyt Vulcan at 65# and with a 28" draw length. How long should my arrows be? I'd like to see them in the 450-500 grain range. 100 grain broadhead, Blazer vanes, and these wraps. Thanks for the help. Rory
Arrow lengths all dependent on your set-up.. have your pro shop help you out. Your probably going to be borderline 400 or 340 spine, I would run with the later
FMJ 340's: 11.3gpi X 29 inches=327 grains 100 grain broadheads 3 blazer vanes=18 grains insert=15 grains wraps=12 grains nock=12 grain Total=484 grains
I think 340 is going to be just a little stiff. I'd bump the draw a few pounds or make the front end a little heavier with a 125 head or the 50 or 75 grain brass insert. The 50 grain insert would put you at 514 grain total weight and bump up your FOC.
I agree, or you could add an inch to your arrow length, putting them at around 30 inches to weaken the spine if you are dead set on the 100 grain heads. If not, you could bump it up to a 125 grain head and probably be good to go.
Justin, what's the rest of your arrow setup? I am not dead set on the 100 grain broadhead, I just have some laying around that I haven't used yet. They also make the model I want to shoot in 125 grain, so I wouldn't have a problem going with the 125s.
Then if I were you I would do as Kodiak suggested. Your finished arrow weight will be about 500-515 grains and will pack a serious punch. Or if you went to the 400's, your arrow weight would drop down to say around 450-460 grains if you used that 100 grain head and your arrows were about 28.5-29 inches long.
I'm currently messing around with 3 different setups. All GT arrows, all 400 spine - Kinetic, Pro Hunter, and Velocity Pro. My arrow itself is 27 1/2" inches long. The best results I'm getting are out of the Pro Hunters. At 8.2 gpi the arrow shaft itself weighs 225.5 grains. Standard inserts at 11.4 gr and I'm using the accu-lite nocks which are 8.3 gr. Throw on a Quikfletch at another 28 grains and my arrow is 273 grains without a tip. My best groupings seem to be using 125 grain heads, with a finished arrow that comes in just under 400 grains. I'm thinking about using the Spitfire Edge for whitetails this fall, but it doesn't come in 125 grains. So in lieu of that I'm currently using a 100 grain head with a 20 grain brass weight screwed on the back of the insert. Finished weight is only about 5 grains lighter than with a 125 grain head. If I'm that concerned about it I can always add another 10 grain weight to my insert. So far so good. Just couldn't get good, consistant flight past 30 yards with my Kinetics. Went back to the Pro Hunter and BAM, dead on.
Thanks for the input guys... If I got the 340 if I shot a 125 grain head I should be fine? Or should I still bump it up a couple pounds? Or the weights? Thanks again
If you can bump up the pounds without any issues go ahead. The 340s are typically good to something like 72 pounds. Personally I shoot a 28 inch blue streak maxima, these are 8.3 gpi. If I wanted a heavier arrow like yourself, I would look into an easton st. axis, at 9.5 gpi. With a 100 grain broadhead they would be a little over the 400 mark. If you want to play with a 125 at that point you can, however, me personally, I like the 340 spine.
Just be carefull with your FOC using those heavy FMJ. I had tuning issues last year trying to use a 100 grain head. It takes some serious weight up front to get your FOC where it needs to be. I switched to Gold Tips GT Hunters this year and tuning was a breeze.
340's or 400's will work depending on tip weight and arrow length. If I were you I'd go with a 125 grain head no matter the spine you decide to choose because your FOC will be higher some then using the 100 grain heads and probably 30 to 35 grains lighter at minimum In total arrow weight. I'm thinking I'd go the 400 route If It were me because the FOC would be higher which Is what a person wants.
If you went with the 400 and a 125 grain head how long would you want the arrows to be cut to with a 28" draw?
Bare shaft at a shop with someone who knows their stuff standing behind you watching your arrow flight and find the right length.
