grizzly, I have a couple scopes with CDS dials and one with M1 dials. I like them both for different applications, my hunting buddy also has a CDS dial so Ive had alot of experience with them. As a quick reference dial the CDS works great, when you get a custom cap designed to your load they're really accurate when you have your gun zeroed to your caps zero. I wouldnt consider a scope with just a CDS dial as a true long range scope, but can be dialed in for bullet drop at some long ranges, 4..5..600yds or even farther. They get rid of the guess work of hold over at longer ranges, I feel comfortable taking shots with my rifles out to 400.. 500 yds. For doing serious long range shooting I prefer my LR scope with windage, elevation adjustments, and parallax adjustment. I would recomend a CDS scope, its a very reliable system if you do your part giving accurate data to Leupold if you get a custom engraved cap, and zero your rifle properly. Hope this helps.