CDS caps are an expensive marketing gimmick, they are only accurate for the exact cartridge used under the exact environmental conditions with exactly the same shooting position as you set them up for; if anything changes then the CDS caps will not be accurate. The better solution is to learn how to properly range your target and adjust the scope.
If you want a shortcut to field marksmanship then you'd be better off buying a scope with bullet drop compensation (BDC) from a manufacturer that provides software that calculates the drops of the reticle marks. With the software, a BDC scope will never be out of sync with changes in cartridges or environmental conditions (as long as the shooter recalculates the BDC drops whenever his equipment or shooting conditions change).
You can accomplish the same results as a BDC scope by simply buying a good scope with a graduated reticle. MOA is easier to work with mathematically and the adjustments are quicker but Mil is more precise and produces more accuracy at long range. BDC marks are simply reference marks on the reticle, a graduated reticle can serve the same function simply by identifying the retcle marks that represent fixed ranges.
If you want a shortcut to field marksmanship then you'd be better off buying a scope with bullet drop compensation (BDC) from a manufacturer that provides software that calculates the drops of the reticle marks. With the software, a BDC scope will never be out of sync with changes in cartridges or environmental conditions (as long as the shooter recalculates the BDC drops whenever his equipment or shooting conditions change).
You can accomplish the same results as a BDC scope by simply buying a good scope with a graduated reticle. MOA is easier to work with mathematically and the adjustments are quicker but Mil is more precise and produces more accuracy at long range. BDC marks are simply reference marks on the reticle, a graduated reticle can serve the same function simply by identifying the retcle marks that represent fixed ranges.