The MV down range was computed by setting up a sky screen set at range and firing through. 600 was about as far as I would go. It would allow me to determine BC on a bullet using Barnes Ballistics (DOS version, windows version sucks) and inputting vel at muzzle and remaining at 300, 400, or 600. Needed two Chronos though to do this with any accuracy as from bullet to bullet error would eat you if you fired one bullet set for initial vel and another bullet set for at range velocity. Generally this was done at only 300 to 400 yards on a KD range with calm conditions. From there you would run the ranges with the data and then "dope " the ranges with actual firing on targets at set ranges.
Things are a bit easier now.
__________________
Hold Hard guys
Rick B.
Knowledge is knowing a tomato is a fruit.
Wisdom is knowing it is great on a hamburger but not so great sticking one up your ass.
Author - Richard.
Experience is what you get right after you need it.
Author unknown.
