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Challenge Spirit Limbs - reducing brace height

Views 40117 Votes 0 2011.08.12 05:45:47

I have bought a set of the above limbs 36#@66" and am using them with a Hoyt Excel 23" riser. The first pair showed a reduction of 1 cm in brace height over 4 dozen arrows resulting in a marked inaccuracy which was disconcerting to say the least. I checked all the set up from tiller to limb bolts but could find no obvious problem. I assumed the string was a factor and changed it for a new one. Then a good used one. The result was exactly the same. I consulted the good people at Quick's in Waterlooville who also checked and changed the limbs free of charge. Happily I tried them out only to find exactly the same letdown over the same period. The string I use is D75/fastflight and this does not change in length.

I am certain that I have checked everything but cannot find what is happening. Once the bow has been unstrung, rested and restrung the brace height resumes its original setting, but again reduces as I shoot several ends.

Please can you help?

 

alison(underscore)wendy@onetel.com

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