The new VPA 2 blade heads have caught my interest. I am currently shooting 29" to b.o.p. Easton 400s with 300 grains total up front-100 gr. brass adapter and 200 gr. VPA Terminator. I am shooting these from both my 55#@28" MOAB and my 54#@28" Timberhawk recurve. I do draw 28" and I get fantastic flight with 4-4" parabolic r.w. feathers. I like the looks of the 300 gr. profile but I am thinking I will need to go with a stiffer carbon. It will be trial and error I know, but if any of you shoot bows in this weight range with 350 to 400 grains up front I'd be interested in what spine weight you are shooting. Thanks-Mike
i am not an expert with anything connected to trad archery, but i do know some important ground rules. honestly, all this business of arrow spine - carbons and woodies - absolutely requires personal intervention. all the expert charts and voodoo calculators will never replace your testing. my main bow is 54#@29" and my carbon arrows are 29.5" beman ics 500 with 350gr up front, 585gr total. these arrows fly just fine - for me. go figure. :D git yerself a carbon test kit, it'll be real useful for more than one bow. ;)
You presently have 300 grains total up front. If you go with a 300-grain head and a standard adapter, you'll be around 320 grains. You may have to trim the shafts just a hair, but bareshaft tuning will tell you for sure. If you want to shoot 400 grains up front, you'll likely need a stiffer shaft. If you're well tuned now, and add another 100 grains up front, you'll be weak in spine.
Have to agree with Jason, 20 grains will hardly change spine on a carbon and I doubt most people have a clean enough release to know the difference. If we were talking 40-50 than yes ya may have to trim a tad off. I know you are saying the profile meaning longer may weaken it a bit as well, but doubt it. I have been playing around a lot lately with shooting thru paper at 12-15 ft. and carbons react very quick and stop flexing pretty darn quick. I have been shooting a 52# recurve(at 28.5") with 600 spine carbons cut to 30"s with 190 grains of point weight and getting a perfect hole. I think you will be fine! Shawn
Yeah for Rob!! I have been saying this for 7 years now. Carbon is tested with compounds(mostly) and when shot off "our" bows it becomes a different animal!! Shawn