Ok please dont get mad at me but part ofwhat you said was incorrect.

Bullets don't leave the barrel and then go upward. Gravity acts upon the bullet the instant it leaves the barrel. The reason it appears to hit high is because the point of impact is above your line of sight at 25 yards becuase your sights and/or scope sits above the line of the bore.

Your line of sight is actually at a very slight downward angle in relation to the barrel causing it to cross the bullets path at the zero range be it 100, 200 yards etc. The bullet isn't on an upward arc, it hasn't dropped to your line of sight yet.

So you can think of it more as we are "lobbing" the bullets at longer ranges. We just increase the angle so that they land at range. There is nothing short of rocket power that can cause a bullet to actually arc up after it leaves teh barrel.

I don't blame you it's not an easy concept to get your mind around. Heck, I had to explain it to my gunsmith. Maybe this will help:

http://www.chuckhawks.com/bullet_trajectory.htm