Thread 64496867

turns out the difference between a 200 yard zero and a 300 yard zero on an AR is 2 moa. I thought it was 3 MOA because the come up in high power is 3 moa but it turns out the come up is 3 moa because the aiming black goes from 13 inches at 200 yards to 19 inches at 300 yards so the extra moa is due to the 6 o' clock hold. also that makes the RIBZ thing fucking stupid because they say add 4 moa but it's dumb as shit unless you're doing like KD shit because why the fuck would you need a 100 yard and 200 yard zero on a 5.56 gun?

People seem to completely misunderstand what MOA means. It's Minute Of Angle. That means a 1 MOA gun will print a group of 1in at 100 yards. That means it will be 2 inches at 200 yards, 3in at 300 yards, and so on. With no factors like wind or dropping to subsonic speeds in play, that means a 10in group at 1,000 yards is technically feasible.

If you were to perform an MOA test in the vacuum of space a rack grade M4A1 shooting 4 MOA is going to be grouping in a 16in circle at 400 yards because that's how angle deviation works. That's all MOA is. It is a measure of angle deviation. You cannot hold in a different spot and cause MOA to change, it is a mechanical measurement.

>>64496884
when you adjust your sights you aren't adjusting them in inches, you are adjusting them in clicks and each click is some fraction of an MOA typically. so if you are shooting 2 inches high at 100 yards you need to drop your sights down 2 moa. I was, incorrectly, under the impression that on an AR the difference in sight settings from a 200 m zero to a 300 m zero was 3 moa or 6 clicks if you have half moa adjustments. it's really only 2 moa or 4 clicks, the extra 1 moa or 2 clicks is from the 3 inches from the target