I will second Awshucks, more info is needed. I use a Horton Yukon and it can be an effective crossbow. I get good groups out to 40 yards (haven't tried any further) using an Excal Lumizone. I use a rope cocker and the Lightning Strike arrows. The arrow recommended for your bow, the Horton LS2,is no longer made.

The first issue you need to decide is if you are going to use the Dial-a-Range feature. If so, your owner's manual andthe Horton website have detailed instructions on how to use it.

Personally, I think the Dial-a-Range is a POS, so I disabled it. I love the graduated crosshairs on the Lumizone.