What do you guys think about using this scope on a 340 weatherby for 900 yard shots on Elk size game ?
Absolutely! As a few have said when the CDS elev dial is installed you'll get slightly less than one full rotation of the dial, thus 900 may not be possible; might be! The scope it's self will come with a non-caliber specific dial that does "not" have the build in stop. Kind of a short M1 dial. Go for it!
Alan
PS. Just checked my CDS and was able to rotate it 14 minutes from bottom stop to top stop.