I have heard this before. Seems totally plausible. I know the phenomenon can even occur in the same cartridge depending on powder type. It is obvious in the .44 Magnum where achieving 1100 fps with 240 grain bullets produces noticeably different recoil depending on whether Unique or 2400 powders are used. Interestingly, tho there is more powder mass with the 2400 and theoretically the recoil should be heavier, the use of the fast Unique causes a very sharp snap that I find much less comfortable.

An interesting test would be to hand a few shooters the Rigby and Taylor running at the same velocities and see who likes what.

If an honest 2400+ fps is demanded, it seems that might crowd out some Taylors, yes? Seems like I read some can make the speed nicely and others have trouble getting there.