I have, well had a 3-9x40 credo on a 9 lug weatherby. It’s currently in the drop evals w/ form. If you do decide to use a rail, this one works. A couple of the ones online that say they work, the hole spacing is wrong.
Leupold 171354
It is tough to keep it close to the bore tho. This is what I ended up with using that rail, medium rings, and that scope. The objective bell hitting the front of the rail is the problem
I got tired of looking at one piece rings that might barely fit. I ordered a peak 44 J-rail so I'll report on that. The back part is low profile so I should be able to keep the credo lower on the bore axis.
It is aluminum so before a shooting review, I will bed the rail to the action and make sure it stayed true after torque.