9.3 X 74R shouldn't chamber in the 9.3 X 75 Nimrod so you're probably right. Only reason I mentioned it is because my drilling is of the same vintage as yours and the bells and whistles went off in my head. Except for the differenece in power and about .030 difference at the head and .020 on the rim dia. the -74R and -75 Nimrod could just about pass for twins.

Last edited by sharps4590; 12/04/12 03:43 PM.
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