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			my $.02 i would say that the stiffness definetely has something to do with a pass through, seems to me something more flimsy wont maintain energy on the way through.  but arrow wieght has something to do with that as does speed.  i would say ask the guy at your proshop, i havent been steared wrong yet.  wait a minute, this guy talked me into buying 100 dollar a dozen arrows for the past 6 years, maybe i've been had.  shooting beaman ICS arrows, all angles and distances nothing but pass throughs,  and i think easton makes a chart to guide you to the right aluminum shaft 
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