Rifle Scopes Mount for SPS tactical w/ 50mm obj scope

UIUCPPQ

Sergeant
Full Member
Minuteman
Mar 10, 2012
308
19
Alright, my Google-Fu is leaving me unsatisfied tonight and I don't want to make the same mistake twice:

I'm ordering Burris Xtreme Tactical Rings in 30mm for my Vortex Viper w/ 50mm obj, and I really don't want to have to deal with shipping a 3rd time. First I made the mistake of getting high rings. Off of Burris's 20 moa rail they were much too high after actually receiving them and measuring them, so I have shipped them back. Now I need to know if Med or Low are the rings I would ideally get. I was going to go with medium, but I've been reading that low works fine. The reason I bring this to your collective expertise is I have also heard low rings can interfere with actuating the bolt.

Hopefully someone can answer my (again) noobish question, I very much appreciate it and I'd like to get it right this time around.

Edit* as mentioned, this is for a Rem 700 SPS tactical.