Thanks for the offer Rod. I hadn't run any numbers and this was all sort of "seat-o-the-pants" estimation.

Here is the way things shake out regarding free recoil calculation.

44mag Super Blackhawk,Bisley Grip, 7 1/2" barrel
320gr WFN @ 1350 fps
Recoil Impulse in (lbs sec): 2.31
Velocity of recoiling firearm (fps): 24.76
Free recoil energy in (ft/lbs): 28.56

480R Super Redhawk 7 1/2" barrel
425gr WFN @ 1175 fps
Recoil Impulse in (lbs sec): 2.56
Velocity of recoiling firearm (fps): 25.34
Free recoil energy in (ft/lbs): 32.39

From the numbers the 480 SRH recoils harder in every aspect however to me it feels softer shooting. The grips having a different shape has something to do with the perceived recoil as I am sure does the fact that the SRH wears a set of Lett rubber grips where the SBH has the stock bisley grips.