I use the 50 M zero on my work amd personal guns. I have found it to be much better than the 25m or standard military zero for shooting from 25-200 meters.
Check out this web site. .
http://groups.msn.com/TheMarylandAR1...ngmethods.msnw
It has some graphs which show the fight path of the rounds using different zero methods.
If you guys come up with anything different than what they show please let me know so I can make adjustments.
Thanks!
SERPENT5XX