true, but there is still the aspect of "relative felt recoil" which is what I asked about
The felt recoil will be more noticeable with heavier bullets even for ammo loaded in the SASS-legal ranges. I have a pair of convertable .44 Ruger OM Vaqueros. When I first started loading the ".44 Extra Long Russian" (thats .44 Magnum brass loaded to CAS standards), I tried the customary 240 gr. bullets. While the loads, in the 875-900 ft/sec range were NOT punishing, I could definitely feel the difference between them and rounds loaded with 213 gr. (210 gr nominal, commercially cast) bullets, which is what I was using, loaded to 950 ft/sec in the .44-40 cylinders. I switched to the same bullet in the .44 Mag. cases, and by adjusting the smokeless powder charges was able to get matching ballistics in both cartridges. Recoil felt the same. Load 250 gr. slugs in the .45 LC, and, depending on the velocities, the felt recoil is more like the .44 XLR loadings.
Now a caveat! Although I know folks who load bullets as light as 180 gr. in .45 LC, and use very reduced loads as a means of dropping recoil, I do NOT recommend bullets lighter than about 200-230 gr., and you need to use a firm roll crimp! Lack of a firm, but not excessive roll crimp can, especially wiith medium-burning or slow-burning powders can lead to ignition delays, hangfires or worse!