Re: MOA question
I do modify the BC tor correlate the trajectory output to my actual drops, but before I change that BC to force it to fit, I make sure I have a perfect 100 yard zero, and the temperature and BP are known. I also measure the actual inches of drop while shooting on the 8' plywood, no dialing this time, just hold POA at the top edge starting at 300 yards on out. The distance the groups actually fall at each 100 yards should exactly match what you're compensating for when you do the test by dialing on out, or something's wrong with your turret's MOA calibration.
Blain Fields has a ballistics program, he calls it the Precision Shooter's Workbench. It will allow you to leave the BC at what it's published to be, or what you've determined it to be, after actually measuring it by two chronographs. The way it allows you to match the two trajectories is it uses a deceleration constant, or DK. By changing the DK number, you can flatten the curve if you find your bullet actually shoots flatter than the program is predicting it will. Pretty simple to match them up. He also has the program for the new Palm PC's.
[ 03-25-2004: Message edited by: Brent Moffitt ]