I have always zeroed my AR’s at 50 yards (1.5" low at 25 yards, 1.5" high at 100 yards, and dead on at 200 yards). So I need to zero a new sbr and am wondering at what distance since this should not be a 200 yard rifle. Or, should I keep zero the same on both rifles for uniformity?
I would think a 200 yard zero would still be correct for the caliber.
Any other thoughts?
Why would you change?
My 10.5" duty rifle is zeroed at 50 yds. It seems to be working fine so far.
-Matt
I have 3 5.56x45 chambered AR’s.
14.5" bbl with Aimpoint: BUIS and optic zeroed at 50yds.
10.5" bbl with EoTech: BUIS and optic zeroed at 50yds.
18.0" bbl with NF 2-10x24: BUIS zeroed at 50yds, optic zeroed at 100yds.
I like standarization.
I use a 50yd zero (start at 25yds getting it good windage wise, and hitting 1" low) then move to 50yds and get it to hit POA/POI.
The absolute best way is to measure your sight height over bore, chrono your load and find the ballistic coefficient of your projectiles and plug these numbers into a ballistics calculator and find the flattest trajectory playing with the sight in distance, use a max range of 250-300yds.
I use this ballistics calculator http://www.handloads.com/calc/index.html