G'Day Fella's,

Welcome on board Marlin 45!
I have Leupold VX-III 1.75-6 x 32mm mounted on my Ruger .375H&H RSM.
This scope is mounted to the rifle, in a set of Warne QD rings and the scope bell clears the 1/4 Rib by about 1 mm (Just Perfect!!!).
I can't find the packaging for these rings but I assume they are a Low set?
FYI, the distance between the top of the Receiver and the bottom of the 1" scope tube is around 8mm or 0.312" at the rear of the front ring. I have never had any problems with these rings, from installation until now which has included around 60 odd maximum power (300gr x 2585fps) shots.
I personally believe this Leupold scope (the new V3 1.75 - 6 x 32mm version), would be a better option on your .458 than the 2.5-8 x 36 which would require higher scope rings?
Also, when you mention this scope to most people, they look at you as if you were from another planet!
Most people have Never Heard of the 1.75-6 x 32 scope but there it is right there in the Leupold catalog next to the 1.5-5 x 20mm!

A word of caution on this Rifle-Ring-Scope, set-up. This scope is an extremely snug fit on this rifle with these rings. That is, front to back between these single Top screw, Warne rings!!!
I don't know if the current Warne Ruger QD rings are still single or double top screws?
I imagine the double screw rings, may be wider and won't accept this scope on this rifle?

Hope this is of some assistance and Marlin 45, if you like, send me a PM/email and I can send you an image of my Ruger rifle so you can see the set-up.

HooRoo
From
Hommer