Based on reviews I ordered one of these. Found it was slightly cheaper on ebay than the deal on midway, all things considered tax and shipping. Paid $105 for it shipped. I have never used a chrono before, but have always wondered what my loads are doing exactly. Also I'm getting more involved with rifle loading as of late and thought it to be a good idea to go aheads and get one. So what all do I need to know about this thing? anything else I need to get for it? What distance should I be shooting at with it? how much of a concern is lighting? I will be mostly using it at an outdoor range but on occasion indoors. Did I do ok for my first chronograph? Anything else I should know?