50 yard vs 100 yard zero for AR15

Everything I own is zeroed at 50.
At 50 there is less effect of weather conditions/shooter and just plain easier to do.
Also at 50 plain and simple,there is less of a +/- window!
Just some confirmed numbers from my Grendel to give an idea..
95 Gr Max
2800 FPS
2.560 Scope center line

Zeroed at 50 yards/MOA
100: -1.24
200: -.77
300: 2.83
400: 6.13
500: 10.06

Zero at 100
50:1.24
200:1.44
300:4.07
400:7.37
500:11.30

@ 500 it translates into 6.5 inches less of drop window.
Win win at 50 the way I see it.Plus for reasons unknown to man.. those 30-50 yard shots on a coyote are tougher then a 150 yard shot for me lol.
 
Based on your application it sounds like 100yds is your mark. That would be my minimum for a centerfire.
50yds is for shotguns and rimfires.
 
Originally Posted By: Tbone-AZYou should try the math for a zero of 30-35 yrds.

It's how we zero'd in the Marines.


I'm not arguing ballistics with you. I am just trying fit the OP's individural situation. If he is shooting most all of his shots at 75 to 100 yds it just makes sense to have his zero set there. There are alot of folks who don't have the opportunity or ability to make a long (over 200yd) shot.
We rarely if ever shot at under 200yds when I was in the Corps and had a 300yd zero then. Of course, that was a few decades ago. But, I have a rifle expert sixth award and a second award expert pistol badge to show for my seven years in the Corps. Semper Fi
 
Went back and re-watched the youtube video Rio posted, you'll note one very significant difference in his rifle and the topic at hand.

A2 sights are NOT the same height as his Red Dot site! The changes in hold over with a sight that is 1.5" over bore is very different than a sight that is 2-2.5" over bore...
 
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