Bill, I don't know if I'm reading you right, but it doesn't matter [ within reason ] if the bore is .725 to .750, it's the amount of constriction that dictates choke. I have a chart hanging on the wall over at the club from some screw in choke manufacture that is a bit easier to remember.
SK - .005
IC - .010
SKll or LM - .015
Mod - .020
IMod - .025
Full - .030
Everything is linear and in MHO as is should be.
__________________
Paul Harm
|