Any LoadBase 2.0 experts out there? I just fired off an email to Patagonia Ballistics. There are no support phone contacts that I could find. Here is a copy of the email I sent. Perhaps someone here has an explanation. Thanks! "I installed your program on my desktop at home and so far have been pretty impressed and satisfied with the program. I would like to know if I can also install the program on my laptop as well. Can I do this under my current license agreement? If so, How? Secondly, if I read your documentation correctly, the mathematical model of this program does not use the normal G1 Ballistics Coefficient (BC) that is so commonly listed with most bullet manufactures. I understand that the program uses a parameter called Drag Coefficient (DC) to make ballistic calculations. So how do I arrive at this Drag Coefficient needed to calculate ballistics for a given load? Again, if I read your documentation correctly, this involves taking a series of four velocity measurements over incrementally increasing distances to a point where the projectile is just above supersonic velocity. Does this mean that I need to set my chronograph up at increasing distances on the range and shoot through it? This is impractical/unsafe on the range and impossible at most ranges. A 7mm Remington Magnum is still well above supersonic velocity at well over 1000 yards! I am confused. Please explain. This would be a lot easier to figure out if I could speak to a real live human being. Please feel free to call me. Thanks, Steve"