[Pattaya]

This is important. using M885 standard green tip 62gn. ammo in an M-4, the difference in zeroing the rifle at 50m instead of 25m means you can hold center mass out to almost 300m and still expect a hit in the vital area.

Here is the ballistics (bullet path in inches):

Z @ 50m: 25m -1.3", 50m 0.0", 100m +1.7", 150m +1.8", 200m +.2", 250m -3.4"

Z @ 25m: 25m 0.0", 50m +2.7", 100m +7.2", 150m +10.1" 200m +11.3", 250m +10.4"

After retiring in 00' from an ODA, I worked as a Dept. of Energy Firearms instructor for 4 years. When someone explained this to me I wished I had known this when I was on the team. It makes sense. Maybe it will help someone out.