V., What do you think of the program? Lot's of information at your fingertips. You can even buy a version ofr your Apple/ndroid Product. I have now missed 3 coyotes that I am aware of because I was entering in different ballistic data just seeing how close a 30-06 is to a .375 or the numbers on a .308 compared to my .223. Pretty ammazing all the information you can find. Even if your a handloader there are G7 drag tables to get the info you need.
What I like about it is you can specify a specific bullet, sight in range, and your measured velocity for a perfect prediction and then print out a small sized card to tape to your rifle for field use.
If you aren't using a chronograph you are guessing at the muzzle velocity and you're going to have to test the holdover points anyway and find out how "spot on" they really are. I have a Monarch with a BDC but since I don't have a chronograph I just had to go test the holdover points for myself.