I have not purchased a new Leupold in 30 years (that's how long they last) but I would like to get a new VX-6. Rather than sidetrack a couple of other threads about the VX-6 right now I thought I would ask this question, so school me on this: What is the difference between M1 and CDS. I don't do much long range shooting; however the other day I saw a nice buck on a pipeline that was at least 500 yards away. I realized then that I had no clue how to shoot that far with my current Vari-x II setup.

What are the differences between M1 and CDS. I do not need a dedicated long range gun, just a better ability to practice for those occassions when I might have to reach out there.

Dan