Hopefully you guys can read through and provide tips or advice for something I might be missing. I am game planning (or window shopping) for the optics portion of a rifle that will ultimately be used for long range. Depending on the rifle in question I am looking at 1,400 to possibly 2,000 or so yards give or take some depending on other components.

The optic I have in mind is the Vortex Razor Gen II 4.5-27 FFP.

https://vortexoptics.com/vortex-razo...x_reticle=1500

For the mount I have a choice between various Spuhr mounts. The first one is a 20.6 MOA mount.

https://spuhrwebshop.com/en/isms/sp/34/6/

The other is a 30 MOA mount.

https://spuhrwebshop.com/en/isms/sp/34/9/

Currently those are my tentative options or something to save towards.

On the Spuhr site, the instructions say to measure the outside of the front bell housing and divide by two. That scope has 2.55" listed as the spec for that dimension so divided by two it gives me 1.275 as a minimum height. Rounding up the 1.5" high mount(s) should be about right. That should be fine and will give me some clearance hopefully.

For the 20MOA vs the 30MOA the instructions say don't use more than 50% of the allowable scope adjustment. The optic has 71MOA total adjustment, which I would assume if mounted on a zero base mount would be zeroed at or near the middle of that range for a 100 yard zero. 71 divide by two=a theoretical 35.5 MOA allowable adjustment (assuming that it had a native zero exactly half of the total adjustment range).

If I choose the 20.6 MOA scope mount it would allow me to have a total of around 56 MOA dial capability (if the zero was truly half of the total adjustment).
If I choose the 30 MOA scope mount it would give me right around 65 MOA dial capability, once again assuming the zero was near the center of the adjustment range.

Now, if I use the reticle for hold overs, that would give me +36MOA more on top of those numbers hence the 20 MOA mount for example would give me a total of 92 total MOA available... which in my opinion is more than enough for how much real estate I have access to. It would give me enough adjustment to go where I want to go with several calibers for long range stuff. (6.5 CM, 6mm etc)

All that said this leads me to think that one of the two options below for a scope mount would be about right for AR patterned rifles.

https://spuhrwebshop.com/en/isms/sp/34/6/qdp-4616.html

Or the non cantilever version...

https://spuhrwebshop.com/en/isms/sp/34/6/sp-4616.html

I am guessing that based on my previous experience the scope pushed forward like that gives me better eye relief in an AR patterned rifle.

I also think (Maybe) that I could actually get into two (the 6ARC and 6.5 CM) sought after calibers by being able to swap the scope until I could get another or make up my mind for something else.

Long story short with this kind of setup I would dial up (some) and then use the reticle for the rest.

Anything to add? Bueller? Am I missing anything?