Its not to hard to set it up. Just make sure you have your crosshairs straight and not cocked to one side or the other. When I did mine I just set the main cross hair at twenty yards and dialed it in within a few shots no problems. Then I set the speed ring on the back to what I thought my CB was and backed up to thirty yards. Then just fired a few and made an adjustment. If I remember right I think if you hit high at thirty you turn the speed ring up and if low you turn it down. Thirty yards is easy to get but when you back up to fifty that ring is really sensitive and a little goes a long way if ya know what I mean. When you get it set at fifty your forty and thirty will still be right on and you will be good to go. The only thing I would recommend and I think I got it from Dan is after you get it set take a nail or something and scribe a mark on the speed ring so you know where it needs to be set because there is no way to lock it down and it can be turned by accident. Don't worry, you will be happy when it comes, that scope is great!