F.G.,

I'm not familiar with the one Charlie is referring, but if you want the feature of dialing in elevation adjustments (so you can point right at the POI at farther ranges) then make sure the feature isBDC. The adjustments are in the same place one removes the upper cap of other scopes to make elevation clicks. The BDC feature just allows one to make elevation adjustments without removing the cap and the graduations on the wheel just show how much elevation has been "clicked"

Thanks for the thoughtful comments. I and all my family are doing very well.