I really do get it and like I said, I'm really not trying to be "that guy", BUT since Mr. Haas hasn't spent a whole lot of time behind a rifle and he is with, or having instruction, given to him, he really needs to get some rounds downrange and experiment with his equipment and learn and apply the basics of the fundamentals, then all the rest, will start to fall into place. I'm sure the Instructor could actually show him the reasons why, while behind his rifle/scope, along with the possibility of environmental conditions, how and why, high/low magnification works or doesn't, hence, the answer to his question(s). Lots of folks on here, really, really, had great explanations to the High/Low mag. "whys". I'm an Info. kinda guy myself and I'm NOT begrudging Mr. Haas any expertise that he may gain from this site, I've gained much myself, I learned the rifleman trade from my ol'man and a pissy R.O. in the Mil., all the rest of my knowledge came from spending a lot of money on lead and the farthest I've been able to shoot, is 600yds (never had any mirage to worry about, even with a cheap Nikon). I'm envious of the folks that can drive out to a range, or hell, BLM land and shoot 1K or even 2K yards, that's fantastic, just not available to me. Again NOT trying to be "that guy". I guess I would start out with the basics first, get them down, then move up the ladder to the next rung. Mac