Rifle Scopes Zeroing buis and EOTech

[The Mall Ninja]

about a week ago i got my AR out together, and a few days ago i took it to the range to get everything sighted in. i started with the Buis as this made more sense to me and went on to the EOTech. being in the military (Air Force Crew Chief, yeah i know...) and being slightly familiar with the sighting in process of an M16, i printed a few of the 25 yd zero targets that we use. i was shooting xm193 55gr FMJBT (at 8.00 and some change this was excelent plinking ammo) anyways i thought i had it zeroed at 25yds for the 300 yd "battle" sight in. when i took it to 100 though i was all over the place, high, low in the middle , every where. now granted i know i was shooting at a hundred yards with iron sights at somthing the size of a baseball, but i think the whole 25yd 300yd "battle" sight is bullshit. i had the rifle in a rest with a rear bag, so movement really wasn't a problem. i was practicing proper breathing, trigger squeeze, and sight picture. pretty much what im asking is if i sight in at 100 yds for a 300 yd zero where do i need to be in relation with my point of aim? and the same thing goes with my EOTech.

 

[paulo_santos]

Re: Zeroing buis and EOTech

Don't mix yards and meters. A 25 yard zero isn't equals to a 300 yard zero. A 25 meter zero is very close to 300 meter zero. So if you zero your AR ar 25 yards, you will be approximately 6.25" high at 100 yards and 8.4" high at 300 yards.

If you have a 100 yards zero, you will be approximately 10.5" low at 300 yards. A flatter trajectory would be a 50/200 yard zero, which would put you at app 5.75" low at 300 yards. You should check out a ballistic program like JBM to help you out.