Well the "felt" recoil will be helped or hurt by two things , stock design and weight .. I cant tell that much difference in the "felt" recoil of the 416 and 458 .. Both kiss you pretty well ..

There is at least one smith who is building a 416 on the 300 RUM .. He has developed a line of cartridges that are somewhat well known ..

I know nothing of him other than his website and he will not answer emails that I send ..