AR-15 Zeros and Trajectories

**298436** · 02-13-11, 21:55

Molon,

Since you have more rifles and carbines than I do and a chronograph, could you verify that Speer Gold Dot 64gr out of a 16" barrel has a proper 200yd zero when zeroed at 50yds? I've tried hitting the 200yd plates at my local range but can't do it with either irons or with my Micro H-1.

Specs for Gold Dot 64gr is 3000fps IIRC, but that's obviously out of a 24" loose chamber spec bolt action test barrel.

**Th3Revreant** · 02-14-11, 11:55

Thought this might assist in getting a better m4 zero in low light conditions or persons who have a hard time seeing the target. PM me with your email if you would like the file so you can print and use this target.

**DacoRoman** · 02-14-11, 12:05

If you want to truly zero for both 50m and 200m, you should zero at 200m because small errors of zero at 50m will be magnified at 200m..don't fool yourself that just cause you zeroed at 50m you will be hitting at 200m!

**nickdrak** · 02-14-11, 14:13

Originally Posted by sgtkracker83

does anyone know the best way to zero an EOTech 512 series for a M4 platform. Haven't done it in years and forgot how. Any help would be appricated.

I like to start off @ 25yards. I shoot 5 round groups at a 1" pasty/square or other similar aiming point. Checking my point of impact between groups, I then adjust the Eotech or Aimpoint to bring my point of impact directly 1.5" below my point of aim at 25yards.

I then go back to 100 yards and make any final adjustments needed to bring my point of aim and my point of impact together at 100 yards. I again shoot 5 round groups and then make adjustment between groups. *Each adjustment click to the Eotech = 1/2" @ 100yds.

**nickdrak** · 02-26-11, 22:15

Molon,

Any idea what the hold over at 500 & 600yds is with a 100 yard zero?

**greyman556** · 03-04-11, 09:28

This is really helpful article. Thanks!

**RogerinTPA** · 03-04-11, 15:04

Originally Posted by Son of Vlad Tepes

If you want to truly zero for both 50m and 200m, you should zero at 200m because small errors of zero at 50m will be magnified at 200m..don't fool yourself that just cause you zeroed at 50m you will be hitting at 200m!

It works for me on 4 ARs. The zero is pretty damn close. Maybe within 1/2 inch to 1 1/2 inch off (higher) from my observations, using Wolf 62 grain HP and FMJ. They would still be A zone/CNS hits. Close enough for me. Try the 50 yard zero, then see what you get at 200. You will be pleasantly surprised. What Molon has posted about the 50/200 yard zero works.