BBWheelgunner, Glad you enjoyed the book. I've written two since that first one -- Addicted to Altitude and Handguns in Wild Places.

Regarding Mag-Na-Port, lately I've been shooting the dual-trapezoidal porting on revolvers. I believe it does reduce some of the muzzle rise. Perhaps not as much on felt recoil but overall - I do feel it helps. I have a FA in .41 & .44 Mag. and both have Mag-Na-Port dual trapezoidal porting. You can shoot both of these guns all day without issue.