Took a noob and a zeroed rifle at 100 and then taking into account outdoor temp, bullet temp, distance, pressure, coriolis effect, barrel twist, wind, earth spin! and prob a bunch of other things I probably forgot about now and learned how to calculate how many clicks it takes to adjust the scope and hit a target at 1/4 mile. Bring your own pencil to class tho, thats one area they cheaped out on. I was breaking the lead every other word as I was taking notes. Ryan-- was wondering why the log book has a side and front picture of a head in it.