[busdriver51]

Easton Epic N-Fused 500 spine (7.3gpi.) 25 inch long weighs 332.5 grains with a 100gr. tip.
Easton Axis N-Fused 500 spine (8.1gpi.) 25 inch long weighs 345.5 grains with a 100gr. tip.
Both of these have small diameter Epic (9/32) and Axis (17/64) very durable and accurate.

 

[busdriver51]

Here is two FOC calculators.....http://www.goldtip.com/calculators.aspx
.....http://www.huntersfriend.com/carbon_arrows/hunting_arrows_selection_guide_chapter_4.htm
FOC on a 25 inch arrow that weighs 332.5gr. or 345.5gr. looks Good.