sskybnd Posted August 21, 2013 Report Share Posted August 21, 2013 i just bought new arrows to hunt with this year there gold tip ultralight 500 at .5 grains per inch. i seem to be having a problume with the ones i have been using to pratice with. them seem to take a wagon wheel circle on the way to the target. they hit where im aming but looks weird the way they fly, i can take one out of the box that i will use to hunt with and the will fly fine and straight. Quote Link to comment Share on other sites More sharing options...
hoosierhunter Posted August 21, 2013 Report Share Posted August 21, 2013 can you blow your arrows spin with out breaking the arrow I've had that happen with my FMJs and it was caused by a bend in the arrow shaft. If your shooting high poundage with a 5gpi arrow be extremely careful because that's how guys have bows explode in their hands. I think I read somewhere that at 70 lbs you shouldn't shoot less than 6.5 gpi. Quote Link to comment Share on other sites More sharing options...
VermontHunter Posted August 21, 2013 Report Share Posted August 21, 2013 Hard to say without knowing what, draw weight, and draw length you are currently shooting ... Quote Link to comment Share on other sites More sharing options...
sskybnd Posted August 22, 2013 Author Report Share Posted August 22, 2013 draw is 28, and draw weight is 66 lbs Quote Link to comment Share on other sites More sharing options...
VermontHunter Posted August 22, 2013 Report Share Posted August 22, 2013 draw is 28, and draw weight is 66 lbs According to the Goldtip arrow Chart you should be shooting a 340 spine from your setup... The arrows you are shooting right now are considered target arrows, and are over spined ... Quote Link to comment Share on other sites More sharing options...
dbHunterNY Posted August 22, 2013 Report Share Posted August 22, 2013 here's what I think because everything is "way out of whack". I've looked at and cross referenced just about every arrow spine chart that exists. i'm an engineer and just that way. I always use Easton's charts for sizing the correct spine. they're right on their website and they lay everything out there with no assumptions (point weight, cam type/speed, braceheight, overdraw, etc). at 28" draw, weight of 66lbs, assuming you're shooting a brace height over 6.5", and 100gr point weight those ultralight 500s are way UNDER spined. Goldtip makes a tough arrow which is why you haven't broken them, but like you believe you've probably broken down the spine on the ones you've been shooting. the spines are no longer consistent and probably weaker than new. that's probably why a new one will fly better. you should be shooting a .340" and .400" spine or something in between (ultralight 400s) and then your arrows won't have that problem. keep in mind broadheads can flex a shaft slightly more than fieldpoints too even at the same weight. not sure if you hunt with them. those arrows you've shot should probably be tossed in the trash. only a matter of time until they breakdown so much they break all together. Quote Link to comment Share on other sites More sharing options...
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