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Discussion in 'Golf Equipment Talk' started by gwhorto, Aug 5, 2008.
Aug 12, 2019 The current limit to COR in golf clubs is 0.830, if a club is tested above this it would be ruled non-conforming. This means the club cannot transfer more than 83% of its energy to the ball. How is COR measured? To measure COR you need to launch a ball at the clubface. Aug 28, 2020 TPF M80 SuperSpeed Hydra NON-CONFORMING.900+ COR D river (Longest Driver ever made!!!) This is the most illegally non-conforming driver that was ever produced. (This is not for the faint of heart!) 1) This 2010 model M80 SuperSpeed Hydra, is the hottest face ever made at.900+ COR.