I found it!! A recoil table that is---

http://www.accuratereloading.com/recoil.html

Found a page on recoil from Accurate Reloading.The bullet velocities are not listed but I assume they are max standard loads.

Interesting that the 416 Rigby is listed as worse than the 458 WM, but at that level stock fit ,etc, may be the difference in the "felt" factor.

In any event my 500 nitro gives me enough max smack to keep me happy.Maybe I need a 505 Gibbs to keep it company??

Think I am going to pass on shooting a 600 nitro or even a 577 NE.

A 577 lite would be another situation though--