My mate, Gerry, has given me his Cobra Jumbo Driver (very generous of him-even though he is a kopite)
I had a go of it at Bowring Park-after a couple of holes it was putting 40 yards on my drives-it's bloody excellent.
It has a COR (Coefficient of Restitution) of 860.The COR is a measurement of springiness of the clubface-the higher the number, the greater the spring effect.
I've found out that the R&A have banned any club with a COR greater than 830.
Gerry-you twat.
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