Hi,

I mounted a Leupold Veri-X III 1.5 X 5 in Warne QD (Ruger type) rings on my Ruger RSM 458 Lott and it is working fine, though I only have shot 40 rounds with it mounted. It returns to zero just fine when re-mounted and I don't think they will "QD" under recoil if tightened properly.

Also I replaced the front bead with the larger one in white from NECG as well as their (NECG) rear peep sight that mounts on the Ruger "dove tail". My old eyes can't see the stock Ruger rear sight, but the peep works great when the scope is off.

I would think a Leupold in 2 X 7 would be a good candidate for a 416 Rigby both in amount(s) of magnification and eye relief.

Hope that helps.

Roi