Re: Lens Cap Dope Stickers And Mildot Stickers
I have several ballistics programs. JBM Ballistics is fine. I have confirmed the predicitions of JBM prior to making the stickers, as one should do with any programs.
Here's an excerpt of another post where I described the process of refining ballistic program data:
The primary purpose of a ballistic program is to get you close on the first round in an environment that is different from that in which you normally shoot.
At ranges of 500 yards or less, your dope will not vary much irrespective of the atmospheric conditions - except for extreme temperature variations with some ammunition, which can affect muzzle velocity.
What I do is to shoot at the longest possible range at which the bullet will reliably stay supersonic. I shoot enough rounds to have a good idea of the average elevation required to hit that target, while carefully recording the temperature, relative humidity, and barometric pressure.
Then I adjust the BC or muzzle velocity in the ballistic program until the elevation calculation for those conditions matches my shooting results.
If I'm using one of Bryan Litz's tested BCs, I adjust the muzzle velocity, because his are usually more reliable than the manufacturer's.
You might find this note informative:
Sources of Ballistic Program Inaccuracies