I had a 500 and shot it quite a bit with 500 and up bullets at top velocities. (Chronographed 1800 fps 500g bullets) Now I did not find the recoil debilitating, but it was stout. I would say quite similar to the heavy 2000 fps 400g 45-70 loads.
I mounted a Leupold VXII 2x7 scope in Leupold PRW rings on a H&R base. I was having some troubles with occasional flyer's. I did once remove the base, clean the screws and holes. Then reinstall the base and screws with red lock tite and proper torque. Then reinstalled the rings and scope. NO lock tite there. But the problems where still there. In hind site, I assume the cross pin, IE recoil shoulder for the ring was cracked and I did not see it. The design of this ring has that cross pin only supported on a single side. To exacerbate this shortcoming, the factory bases slots are very small and located on the very edges.
Here is some pics of what I mean.
You can see the cuts in the base for the cross pin I just mentioned.
Here is the offending ring. I feel it failed because of its design. It holds up to most calibers, but not the 500 heavy loads.
I still use these rings and I do like the looks and heft. I do NOT use them on anything with substantial recoil.
Burris ZEE rings are steel and have a full width cross pin. Same for the Warne rings. BOTH are my top pic for a good stout ring.
For the base, I do use the factory still, but only because I haven't swapped them out yet. IMHO they are insufficient for all but the lightest recoiling calibers. Warne bases get the nod for heavy kickers or extra duty type use.
CW