How did you first learn about trajectory?
I first learned about trajectory by shooting at birds with a used daisy red ryder bb gun. I had been shooting them off the dog bowl by aiming dead on. Then I tried to shoot one off the telephone wire which was double the distance away. Missed the bird but the bb did hit the neighbors window and the neighbor lady came running out but didn't know what was going on or I would have gotten an ear full. (as she was wont to do every time I mowed the lawn) That day I learned to care about what was down range when I squeezed off a shot and about the rainbow drop of a bbgun.