Originally Posted by vendetta333
so you're saying that they'd probably be pretty far off?
Its a crap shoot chances are not good past 300m, its not a precision optic that's not what it was designed to be. But we can make it work it will just not work 100% as designed.
The lines are 19" wide(the average of a mans shoulders) this is how the scope is used for ranging. So if the rounds are not matched to the stada lines in the optic and you range 600m and hold 600m you may be high or low. Unless you use the BDC with a range finder and ignore the numbers to the left of the line.
You will then need to do one of two things, shoot the drops and record the data (dope) or take measurements. To take measurements you will need a 100m range and a meter stick
Tape the meter stick to your target at 100m and record the measurements between the stada lines. Then enter all info into a ballistics program.
ACOG BDC reticle measurements - M4Carbine.net Forums