AR-15 zero range discussion by Travis Haley

[Al Thompson]

Thought this was interesting, though I'm not sure why he included both the 50 yard and 200 yard zeros.

http://www.youtube.com/watch?feature=player_embedded&v=8iCNIRuQuBg#!

 

[Mot45acp]

This is first I've heard of the 36 yard zero.....interesting

Thanks.

 

[W.E.G.]

Otherwise known as "maximum point blank range."

Totally agree that the short-range zeroing is only half the testing.

You must VERIFY your impacts at actual distance before you can declare the rifle as "zeroed."

 

[jim243]

Very good, this is the first person I would 100% listen to for advice. Nice presentation and informative and not preaching.

Thanks
Jim

 

[taliv]

this is the first person I would 100% listen to for advice

really? why?

 

[jim243]

really? why?

Because he is not preaching but giving you options and hints that you can choose to use or not. Most U-Tube "gun experts" sound like it's their way or the highway and the unwashed masses know nothing at all. I could care less how great they think they are, but I will sit and listen to an interesting speaker that "I" think I can learn something from. I also watched 4 more of his videos and enjoyed his presentation skills and they never sounded like he was talking down to you.

That's why.
Jim

 

[taliv]

interesting perspective.

by contrast, i don't listen to anyone 100%, but strongly favor those with a long history of being correct, regardless of attitude or presentation skills.

 

[Cosmoline]

Isn't he just talking about the IBZ?

 

[gotigers]

I thought IBZ is 50/200.

Out of the zeros the vid mentions, i like 50/200. I am not a pro operator, I shoot 3 gun using a Nikon Monarch African 1-4x. The 50/200 keeps me within 2" out to ~250 yards and 7-8" at 300 yards. This covers all of the matches i shoot at in my region. I think the 50/200 would be fine for me if i ever needed it for some sort of self defense.

I use the same 50/200 in SRS matches with my A2 sights; FSB and carry handle.

 

[Al Thompson]

Cosmo, more of a comparison of zero ranges (25y, 50y, 36y, 100y 200y) than a recommendation of a single one.

For my purposes, the IBZ from LTC Santos (50/200) works fine.

 

[stubbicatt]

Seems to me the height of the optic off the centerline of the bore will play some major factor in whether one chooses 36 yards, 41 yards, or 50 yards for an initial zero, if one expects the trajectory to put his round close to a zero at 200 yards.

 

[Matthew Courtney]

Great video with good explanations of the options. I like how he includes that there is no zero which is best for every one in differing circumstances. It would have been better, I think, if he had mentioned how different loads, different sight heights, and different sight radii can alter trajectories. It is awesome to see good, solid information getting publicized. Too many rifle shooters fumble around with myths and old wives tales and we have a dearth of 400-600 yards rifle ranges where folks can see trajectories for themselves. Overall, a thumbs up!

 

[Caliper_Mi]

Seems to me the height of the optic off the centerline of the bore will play some major factor in whether one chooses 36 yards, 41 yards, or 50 yards for an initial zero, if one expects the trajectory to put his round close to a zero at 200 yards.

You are right that these are certainly sensitive to sight height. Generally all of these zero systems assume a carry handle sight (A1 or A2 irons). That's about 2.5" above the bore.

 

[highorder]

I've also settled on the IBZ 50/200 zero. I rarely shoot beyond 200 yards.

 

[Matthew Courtney]

M4 rear sight is 2.6 inches in height over bore, as is a RDS with an absolute co-witness. So called lower 1/3 co-witness RDS set ups tend to be 2.7-2.8 inches in height over bore. With a 36 yd zero, the difference between a 2.6 and 2.8 inch height over bore equates to about a 2 inch difference in poi @ 400 yards with m193.

 

[C-grunt]

Travis Haley really knows what he is talking about, especially when it comes to precision ARs.