Since I will rarely shoot past 30yds,I want a relatively heavy arrow that packs some punch,last years set up was a 490grns @260fps,with 78lbs of ke,Imust say it had plenty of everything in my mind.This year I may shoot a lighter arrow,i think it weighed out to 428grns,I picked up speed and ke stayed about the same,still plenty of everything.I bought some 50grn brass inserts to try in these new arrows it will give me a higher foc if it doesn't weaking the spine too much.