RE: If
Hmm...
I guess that is correct. On the same line of thinking 2 bullets fired from 2 different guns horizontally would also drop at the same rate. The reason that one "drops less" than the other at say 400 yards is because it travels that distance in less time. When the first bullet travels the 400 yards in say 2 seconds and has dropped 20" while the second bullet has only traveled 300 yards in the same 2 seconds and has dropped 20" but by the time it gets to 400 yards it will take 2.5 seconds and it will have dropped another 5".