Proposed R&A/USGA COR Solution

The R&A and the USGA have reached an agreement on a proposal that will apply identical standards worldwide to regulate the 'spring-like' effect of driving clubs. A difference has existed between the two organisations since 1998 when the USGA instituted a 'spring-like' effect test while the R&A refrained from doing so. The USGA's test procedure measured the coefficient of restitution (COR) of a driving club and the limit was set at 0.830 COR The proposal, which is subject to the two organisations' customary notice-and-comment processes for equipment rules and their independent review, contains four points.