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This tells you your not dropping as much as your chart says you will, so if like I said before everything is correct, it has to be the wrong BC, so slowly raise the bc of your bullet in your program until your drops match the chart BINGO! now if your on at 300, 400, 500 yards, it just stands to reason you'll be on at 700, 800 and 900 yards.
Once you understand how it works, this isn't that diffacult.
If you are using ESKIMO or the like, that is the way to get a true drop....
BUT, if you are using the EXBAL program, in lieu of messing with the b.c. directly, you can use the TRAJECTORY VALIDATION feature in the OPTIONS tab. It tweeks the bullet's velocity to make your #s crunch, in lieu of skewing b.c. Same difference to me, as long as my raw & actual data match!
The TRAJECTORY VALIDATION feature in EXBAL allows you to quickly correct your hits by inputting the height difference of your actual hits at a known distance, as compared to the data given for your present conditions. It is so easy to do that it took me longer to type this post than it would have to corrected a complete drop chart (minus the shooting part) /ubbthreads/images/graemlins/grinning-smiley-003.gif
