You do not need a leupold range finder to use a leupold scope. I have a sig kilo 850 and a leupold scope with a MOA dial. I would not want a CDS dial because like mentioned above it is set for the atmospheric condition and only one bullet. If you change bullets or major change in atmosphere condition then the CDS dial is not bang on any more.
I have an app in my iphone that lets me calculate quickly how many MOA's I need to adjust. Also I have a quick dope card on my gun for ranges out to 500 yds. Example on my gun my dope card says 450 yds = 8.3 MOA, so then I just dial my scope to 8.3 if it is a 450 yd shot. This dope card is for average atmospheric conditions.
Check out long range shooting if you really want to learn this stuff, I only have a basic knowledge and do not shoot that far.