I've always heard the trajectory of a projectile from a rifle usually crosses the line of sight at approximately 25 yards and again at approximately 100 yards and over the years this has proven to be true with several rifles I have owned. For some ungodly reason I began to wonder if the same holds true for handguns. Actually, I began to think about this subject after putting a red dot sight on a Ruger Mark III and seeing the difference in point of aim and point of impact at difference distances. I guess I have too much time on my hands now that I'm getting too old to think about sex all the time. Can anyone give me info on the trajectory tendencies of a handgun?