What are you thoughts on the several external ballistics calculators that are out there? Here is an example of one... External Ballistics Calculator It seems to me that it is hard to argue against the numbers that one of these things provides since math is math, and physics is physics. On the other hand one can argue there is nothing better than the real world results of actually setting up targets and shooting at the varying distances. I have had pretty good results using the calculated bullet drops from the above link for my 338-378, but nothing past 600 yards so far. Personally, I feel the calculated numbers are the way to go since they are measuring the ideal conditions...ie eliminating any human error in the form of steadiness of the rifle, pulling a shot from jerking the trigger, etc. Curious to know what other think about this subject.