Alright, here we go...I seen someone posted some info on here about kinetic energy and arrow weight. I have always wanted more speed, but realize now that that is not the most important thing about bow hunting. First, my setup: Bear Strike 50-60#, 27" draw length, 28" arrow and @ 52 lb. draw weight. Beman ICS Bowhunter 300 series @ 9.5 gpi. Ok, I like the ke right now. My groups are not that bad, but wondering if I am shooting an arrow with 'too much spine'. I have been looking at the Carbon Express Mutiny Arrow 250. Not sure what the gpi rating for that arrow is, but it is more 'matched' to my set up. Any other suggestions would be appreciated. I am looking on ebay for some good deals. That is the 'only' reason for looking at the Mutiny. I don't have a lot of money, so I am looking for a real good deal. Though, not cheap. I am looking for a decent arrow for a decent price. Thanks all for the help.
Yeah that's pretty stiff for your setup. Like the post above this said, you're probably gonna need an arrow with a spine around 400. You can usually look on that arrow company's website and they'll have a spine chart for their arrows to help you pick the right one. I shoot 400 spine gold tip kinetic hunter arrows and they're 9.5 gpi so you don't have to get a stiffer spine just to get hevier arrows. Do a little research and you'll be set up in no time
I am understanding a lot more about arrows and arrow weight, but when you say look for something with a .400 spine, not sure what that means. Every arrow company has there own series. Could you be more specific about what ".400 spine" means? Thanks.
Spine is the stiffness of the arrow, how much a shaft flexes with a 2lb weight in the center when supported 28" apart. The more the shaft flexes the weaker the spine and the less the stiffer. A .400 spine flexes 4/10 of an inch, a .300 flexes 3/10 and so on. Spine stiffness will affect how the arrow shoots. Lighter DW's and shorter DL's are usually matched with weaker spines. Some arrow company's match their "series" with the actual spine and in your case the beman 300 series have a .300 spine. A .300 spine arrow would usually be shot out of 70#+ bows and 29+ DL's. For a 52# DW and a 27" DL I would start with an arrow with a .400 spine, maybe 30" long and a 125 grain tip. If you go to an arrow manufacturers website they have guides to help you determine what their series translates into spine but, like I said earlier, usually the series number is the spine rating too.
My suggestion would be the Easton Axis in a .500 spine with 75 grain brass inserts (easton makes these as an option). If you use feathers your arrow weight will be around 420 grains with an foc around 18%-19%. This combo should blow through deer with ease. That should put you in the 220+ fps range with your draw length and with that bow. Plus your spine should be right on. This is keeping with your 28" shaft length(assuming 27.5" carbon length) These numbers are without a wrap on the arrow and the Axis comes with a wrap installed.I would cut them off if it were me. I set my son up with this same arrow but in a .600 spine and with the brass inserts he is getting right at 19% foc with the wraps. He wouldn't let me take them off but out of his 25" draw and 43# he is pounding targets.
Bruce explained it well but some arrow companies keep you guessing and researching for the spine,others like Easton put the spine on the arrow as it's size. An easton axis 400 has a .400 spine. One more thing,the 75 grain brass inserts are 75 or 50 grain. you break a small piece off to make them 50 and that would yield 5-7 more fps and about 16% foc. Also a good option.
