ORIGINAL: ijimmy
With you specifications , Id say you would benifit greatly by cutting 2 inches off of your arrows , thouse arrows are underspined for your aplication at that length , shortining them 2"s would improve the situation greatly , allthough you may still be slightly underspined at 28 1/2 "s
WRONG! Those arrows are WAY OVER spined for that setup. Check Carbon Express arrow selection guide and run the numbers. He should be shooting CX200's, not CX400s. CX400's are some of the stiffest arrows CX makes. With a 62 pound bow and an 85 grain point you are already overspined and cutting 2" off would only make it WORSE.
You can shoot CX400's at 28" just fine -
IF you are drawing 82 - 87 Pounds of adjusteddraw weight.
(go to www.carbonexpressarrows.com and download the arrow selection guide.)