Ok, so basically there is no magic way to say get a perfect headshot of a silhouette at any distance between 10-400 yards without hold over or under is what you guys are saying. So, basically if I am engaging something from 25 yards or closer I am going to have to aim lower, how much is kind of guesswork, and then if I want to engage something say 100 yards or more I am going to have to hold over or aim up, correct? The problem here is, how the heck do you determine how much to holder over or under? How on earth would a sniper ever hit his target the first time. I mean I guess if you shoot a lot and you shoot a lot at different distances then you know exactly what adjustments to get your rifle on center at 100, 200, 300, and so on yards. I imagine that is why they keep their little book handy, huh? I am guessing that little book is where they write down what adjustments they did to get their rifle on target at different given distances. That would make sense. So, what you are telling me is that I need to keep a little book like this for each rifle, more or less, so that when I take it out I know how, where, and how much to compensate. Wow, there is a whole lot that goes into this stuff.
And then, if you change barrels I imagine that you have to go through all of this junk all over again, huh? Wow, why on earth would you ever want more than a handful of guns? Thinking of this stuff I don't think I would ever want more than 5.