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Old 02-24-2008, 06:58 PM
  #3  
sluedtke
 
Join Date: Jan 2008
Location: Wisconsin
Posts: 106
Default RE: Calculate my fps w/o chrono

For every inch of draw length you go down you will lose 10 FPS

For every 5# draw weight you go down you will lose 10 FPS

For every 3 grains of weight your arrow is over IBO you will lose 1 FPS

For every 3 grains of weight you add to your string you will lose 1 FPS.

So I would guess about 273 on the head. It could shoot a little slower it seems like they always do.
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