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Percent Let off Calculator for Compound Bows
You will need IE4 and above or Netscape 4.08 and above to use

Percent Let off = ((Peak Weight - Holding Weight) / Peak Weight ) x 100
Let off is the percentage of draw weight held while the bow is at full draw.
Pull the bow down on a scale to just before breakover, this measured value will be the Peak Weight.
Pull on down till the cam rolls over and just touches the wall, this measured value will be the Holding Weight
Measured Peak Weight (lbs)
Measured Holding Weight (lbs)

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