What Distance Should you Zero your AR 15?

[@strat1960s]

It had been three years since I last shot my rifle. Moved out into the sticks, built a home shooting range and now I am blowing through 100 rounds a week. This video is very relevant to me in trying to figure out the best way to set up my rifle. Thank you.

[@thirdlantern]

Curious to hear what you opted for. I'm keen on the 36 yard zero, but in my locale - eastern woods with 75 yard shots maximum - the 50 yard zero might be better.

[@mobilegamersunite]

Lucky guy, I want my own range so bad!

[@RichM0410]

Man I cannot stress enough the appreciation of you doing this video! Thank you!

[@skim2958]

I like how you understand physics. Whether an object is travelling or standing still, they all drop at the same speed. Thank you for this video.

[@Greeneyetactical]

You would be astonished at how much that statement flipped some guys out

[@DB2A7]

Just doing a "quick video" at 2 am while drinking coffee..... 77 minutes later. 🤣 Awesome!

[@tonythebutcher1959]

Double Bee 😂😂

[@hotrodray6802]

2 more coffees and hed still be talking.

[@lancereed1631]

😀😃

[@Czechmate99]

Me: *Starts watching video* Eric, from Green Eye Tactical: "I wanted to do a quick video..." Me: *Looks down to see 1 hour, 17 minutes, and 38 seconds left in the video*

[@Czechmate99]

@0:17

[@rubeclayton8233]

Too Much Coffee....

[@Greeneyetactical]

An hour isn't a quickie? Hm, I need to change my metrics in other arenas.

[@Czechmate99]

@@Greeneyetactical Just poking fun. I appreciate the information.

[@Greeneyetactical]

@@Czechmate99 same, no worries man

[@meangreen816]

Man you knocked it out the box again. Really appreciate all the hard work and time you put into collecting all this data.

[@sawdust6968]

not only do you know exactly what your are talking about,you also know exactly how to explain it. well done sir.

[@Greeneyetactical]

Thanks

[@survivalkraft]

Ive been watching a lot of videos and reading articles/books on this subject, and this is the first video that was grounded in logic and did not parrot the bad information of others. Thank you!!

[@jerrywalker6043]

When he asks his wife for a quickie, she just give him "the look" and walks away. Great video, lots of good information. Nice to see some actual data and science applied to the subject. This video is criminally under viewed. I guess with everyone wanting a quick fix, one size fits all answer or battling their own cognitive dissonance it always will be. Well done sir, well done.

[@Greeneyetactical]

That wasn't a quickie?

[@brianmurphy950]

An excellent detailed thought provoking video. Your extemporaneous delivery of an hour and 20 minutes explanation of your thought process shows that you know the subject at a level most do not.

[@mikes9963]

At first I thought there was no way I could sit thru such a long video. I grabbed some coffee, sunk into my chair, and was completely humbled at the complexity of the topic. I totally appreciate the over simplification of asking such a complex question of “what zero should I use?” I also appreciate the data driven discussion instead of opinions, anecdotes and “trust me” advice. Of special note is your acknowledgment of this information being used by people with nefarious intentions and breached the notion that some information is sensitive and shouldn’t necessarily be in the public domain. Personally, I completely agree!! Thanks for a reasonably deep dive into a complex topic and simplifying where possible.

[@Greeneyetactical]

Glad you enjoyed it

[@christopherdantis4532]

Excellent Job! I am a retired Police Firearms Instructor/ Taught at Police Academy in Buffalo, area Eire and Niagara Co. NY for 7 Years. CRITICAL THAT ALL ZEROS, were documented on targets, out to 300 yards, serial # of AR Rifle, and ammo , manufacture, lot number, weather conditions and Instructor who zeros the AR rifle signed on each target. Zeros completed yearly.

[@Jeff_Seely]

I liked this instructional video so much that I put you to the test. I got my 11-year-old daughter, who loves to shoot, to watch this instructional and you explain things so well that she had grasped all of these considerations. I asked her questions and she answered correctly. My point is that you explained things so well that even a preteen child understood the factors that go in through sighting in a rifle. This is an absolutely outstanding video! Thank you for uploading it!

[@CrazyHyperecords]

Thank you sir for teaching me why my bullets were hitting 2 inches low at 2 car lengths. Now i understand holdover. Most importantly, because of this video, i now know how to shoot accurately. "Love, Peace and Soul"

[@Greeneyetactical]

Yep, anywhere inside of your near intersect for your zero, the POI will be lower than your POA

[@ImpulseToAdrenaline]

"Just woke up at 2am and gotta do a quick video."

[@matthewhill1163]

I just found this tonight by accident. You’re spot on. This was the best video I’ve seen in a very long time.

[@Greeneyetactical]

Glad you enjoyed it.

[@alvaroeloredo]

Just watched this for my 3rd time. Always a treat to watch, thank you so much for taking the time to share this with us.

[@Greeneyetactical]

Glad you enjoyed it.

[@coolbreeze2.0-mortemadfasc13]

This is a man who takes this work extremely seriously.

[@terrygatewood340]

Can I get a quick 2hr video on dot size , good info I liked it

[@Greeneyetactical]

No but I did an 84 page report on reddot parallax

[@rubenflores3291]

I loved this video.. lots of information .. I had just watched a video about the 36/32yrd zero .. but hie you broke down the yards and Bullet drops at different yards with a standardized zero was very helpful.... i had to subscribe to watch later videos lol... thanks again ..

[@christopherdantis4532]

Thank you for your service to our country and continued service to our community in your education of safe effective use of their firearms.

[@russ_vee_jr4199]

Excellent presentation with focused content. You've explained the topics at a level of detail so we didn't get lost in the weeds. I'm going to sub and go back 8 episodes and devour them. Thanks for a job well done........

[@thepuertoricanconservative625]

I like how you said things like quick video and real quick and short in reference to this video buuuuuut is over an hour long

[@boricuaarecibo9259]

Wasup papa soy boricua y soy conservative

[@stu4428]

Hey Green Eye Tactical thanks for a knowledgeable video, very helpful. I believe at 38:24 TSX is Barnes ammo. Thanks again mate. Cheers - Stu 😎

[@Greeneyetactical]

Yep, it was a Black Hills load. It was early- wasn't 100% awake, that's my excuse anyway, lol. Tanks for the comment.

[@randyk2904]

excellent video. Yep quick on the amount of info. But covered very well to understand i have a lot more work to do .. Thanks..

[@Greeneyetactical]

Glad you enjoyed it

[@michaeljohn8905]

I’m definitely going to check out those books you have on your table.ive been reloading for 8 years and feel like I’ve just scratched the surface. That being said I’m starting to understand much more about what I’m doing.

[@Greeneyetactical]

The Applied Ballistics books and seminars are WELL worth it.

[@louisbarberjr8541]

Ty sir for this new shooter no military experience, really appreciate the knowledge.

[@tompollan7322]

Well done. Very informative with a nice dose of wisdom imparted at the end..... data / facts really do matter and are essential to zeroing.....and to having constructive conversations as a whole. Keep up the great work!

[@Greeneyetactical]

Glad you liked it.

[@shannonfalk8619]

Anyone else notice the "This documentation is confidential.." warning at the bottom of the data screens? :) Great video by the way. I had one of my new shooters watch this to try to get him to wrap his head around a rifle "Zero".

[@Greeneyetactical]

Ah, yeah copy and paste from some of my class slides. Just stupid trademark lawyer stuff. Goes out the window when you freely share it on public social media.

[@jamesjones8460]

That was great info. I am kind of an odd shooter. I use the cheapest ammo I can buy. This way is usually always equally bad. I have my AR's zeroed at 100 yards and can be close to 100 yards ( within a dime sized group). My .308 I hand load but still zero at 100 yards. there again to 100 yards I am of by a dime. my .243 again 100 yards and again within a dime. I have an 8mm Mouser and zeroed at 100 yards. I do this because my property you longest shot would be 100 yards. If I go to another place I know my guns and the ammo and can cover 200 to 400 yards depending on the rifle. Like you I served and used the military method but for my state and the environment I am never going to surpass 400 yards. so I keep it simple. My method works for me. It may not for someone else.

[@leetexas3924]

My God. Reminds me of asking a engineer what time is it and he tells you how to build a watch !! JMO

[@jamesmilton3765]

i agree 100 percent

[@e-racer4673]

Rite 😁

[@delmusingle2338]

But it does help to understand all that affects the end resultant of what you are attempting to do..... As an electrical engineer, there are many variables that affect how current does in a circuit even though many variables are seldom considered by the end user of that current. It still matters to the engineer.

[@matthewriegner5180]

This just makes the point that range days are meant to gather data to refine your understanding of your weapon, optic, and ammo. I've also heard a good philosophy for zeroing is to look to have the smallest poa/poi variance for the practical distance you and your rifle will be shooting at and that requires getting out and testing your equipment at those distances.

[@Greeneyetactical]

You 100% get it. Data is everything and the data should drive the logical choices. Thanks for the comment.

[@robpetry84]

You should have way more subscribers. Great info.

[@jwchoi9823]

Amazing isn’t it? With the qualification, experience and knowledge he provides yet I see “experts” who put their MBUS on backwards (and didn’t know it until people told him in the comments) get 100x more views. Crazy.

[@petercarmody4897]

Don't forget that for the Santos 36 yard zero, the factory setting for the rear elevation needs to be reset on where it bottoms out. It should bottom out 2 clicks past where factory set it at on the M16a2.

[@Greeneyetactical]

I only briefly mentioned it to explain the origin of it. That type of zero will not match the ballistics of your common AR-15, ammo and sight combinations

[@michaeljohn8905]

Thank you for taking the time to make this video . Extremely helpful.wrapping my head around the fact that gravity effects. The bullet right away was helpful. I fly as a hobby so I know that the bullet has zero flight properties. Great info. Thanks from the ATL. Mike.

[@Greeneyetactical]

You would be surprised to see how many angry messages I get from people screaming that a bullet DOES have lift properties and it DOES rise. But, they are probably flat earther's anyway

[@michaeljohn8905]

Green Eye Tactical 😂 the dumbing down of our society is complete . It actually scares me that the human mind can be molded ( to a degree ) to believe or say they believe anything you want. These flat earth people remind me of overtly religious people. It’s like ok if nobody was around would you act or say these things.How do you believe it’s flat? . Lol. Idk. Yea but back on GRAVITY. Yea that bullet might have a better flight characteristics than a brick but ZERO positive climb. LIFT WIEGHT DRAG. and that bullets is not overcoming lift. This does bring up a cool idea. Imagine we had little wings on the bullets that pop out.to over comb lift. Lol. 10 mile long range shot! now all we need is a huge scope👍

[@johnnottahcal5725]

I zeroed 4 rifles, made coffee, fed dog, and made it back in just enough time to get the summary info. 😂 Good fun.

[@johnmerritt1094]

Excellently presented. I firmly believe one should custom sight each weapon for its task and its ammunition… mission specific. ( former military and current state certified instructor)

[@rontate7719]

About half way thru this. Holy flip. Holy tihs. Making coffee Back up 20 to 15 minutes (time index not angle) and continue. Thx so far

[@Greeneyetactical]

Glad you liked it

[@jwsmokey2162]

Excellent instructor,Keeps it all straight,a little fast kinda hard to keep up with,if your not on top of everything,good to watch video and return after you get familiar with some terms.but my kinds instructor.

[@Greeneyetactical]

Glad you liked the video

[@Whitesp44]

Outstanding. Hats off to you for pointing out the LE 50 yrd zero. My agency does that. However most of us who are in a state agency can cover cities (urban) and rural areas. Great point about the large schools and malls. I am baffled by this. Policy is policy and it's in place because it has to be CYA the agency. But we are responsible for every round that goes down range. Should be up to the individual who knows his/her patrol area. Like you pointed out in Texas. What part of Texas? Flat ranch for miles or Dallas? Policing and deadly force via firearms is complicated. Can't just lay down cover and maneuver on the bad guy (99.9% of the time). My agency is just getting around to mounting red dot on our rifles!! I've been qualifying with irons forever. Thank for the video good info and well explained. Felt like I was in training, without falling asleep.....

[@Greeneyetactical]

Thanks for a comment. I live in McKinney It sounds like you are already all over this, but I'd like to elaborate on some things you mentioned for the rest of the people out there. A couple things to consider: - When talking about maneuvering and covering, there is something often missed by LE departments . The concept that tactics are separate from use of force. When maneuvering on someone and having someone cover you, whether the cover person is shooting or even has the weapon pointed solely depends on that persons ongoing calculation of fear of serious bodily injury or death to themselves or a 3rd party. - Another thing, to be able to take accurate shots at short distance (1-200yards should be considered short, but not close, range)- you need to know what your zero is doing to the Point Of Impact in relation with your line of sight. Unfortunately most don't know and most departments don't even have ranges that go past 50yds.

[@Whitesp44]

@@Greeneyetactical well said

[@brandontorres7557]

So what should I zero my Ar?

[@Greeneyetactical]

Good troll

[@jhughes2466]

This was phenomenal. Great job.

[@Greeneyetactical]

Glad you found it useful

[@Econolinebus]

Very well presented with variables to consider and why they play a role. Liked and Subscribed. You and Mountain Mullets Merica should collaborate

[@hiwayhighway9925]

I'm a big fan of looking up the ammo ballistics you will be using and type of optic. Just match up the intersection. You can even use shorter ranges to simulate the distance.

[@Greeneyetactical]

It is a good starting point, as long as you remember you still have to physically measure your actual height over bore, the actual muzzle velocity from your rifle and the atmospherics when collected.

[@scottpreston4021]

Great video. Very informative

[@Greeneyetactical]

Glad you liked it

[@bradwjensen]

So basically they should make sights that have maybe 3 saved settings that can quickly be dropped into, kinda like having personalized driver seat settings in a car. You click person 1, 2, or 3 and it moves the seat to that saved position..

[@Greeneyetactical]

That could be useful for having different saved zeros for various ammunition

[@Jdowling357]

M855 and XM193 , I’ve had the flattest trajectory at 36 yrds. (W/noveske 14.5” barrel)Less deviation in point of impact over about a 300 yard range. After that drops pretty quick. Nice info and video. Many variables go into this that people don’t realize

[@Greeneyetactical]

You are definitely ahead of the norm if you get that. Glad you enjoyed it.

[@scotrule6128]

I understand, for CQB-work, we used a 100/Yd0, as this would be best, as it gives the tightest grouping from 25/Yds out to 250/Yds (well beyond the range for any working CQB team). If there is anticipated engagement beyond 250/Yds, then a 36/Yd zero would be best, as it produces a tight grouping from 25-300+/Yd’s @ around a 6” spread, slightly larger than the diameter of a CD. ***This is a generalization for any grain 5.56 NATO/7.62x39/.308*** ~Former USMC STA Platoon and US Department of State (CIA), Contractor

[@Greeneyetactical]

You have pretty much disregarded the entire content of the video. First, your zero has nothing to do with grouping, that is fundamentals. Second, the enemy gets the final vote in the engagement distance. Lastly- general zeroes aren't a zero. There is no generalization about it. Either you are zeroed- meaning your POI meets your POA and the desired distance or it doesn't.

[@calvins4084]

this video is money, thanks for explaining it better.

[@Greeneyetactical]

Glad it was helpful

[@abstractapproach634]

14:43 more power, not more energy you just want more of the energy while it's in the barrel. Technical but yeah, thought I'd let you know incase you care

[@Greeneyetactical]

No, energy in the form of velocity.

[@abstractapproach634]

"You need energy to move mass, and if you need to mass to a set speed in a shorter distance you need more energy" 15:05 ish is the sentence I was referring to btw, if both mean kinetic muzzle energy the sentence is circular and makes no sense, one must have been chemically released energy..... I guess you can argue "chemically released energy in the barrel" is implied, but just saying you need higher power rounds means that and has no implication. But I'm a mathematician, maybe y'all get sloppy with your units when it doesn't really matter.

[@abstractapproach634]

I think thus is the best presentation on youtube btw, not trying to dog you .... I'm an organic chemistry and mathematician.....I can't help myself when it comes to units.

[@Greeneyetactical]

I didn't say "power", that would not be a proper term for this. The statement isn't circular- it is referring to a shorter barrel, where you need faster burning propellant. These are the proper and common terms for ballistics. Usage of terms can vary in different disciplines. If you'd like to deep dive the application of some of these terms, I would suggest picking up Brian Litz's Applied Ballistics books. They are very good.

[@mrbubbles6961]

Good understanding of ballistics, nice chronograph on background 👌

[@johnrice1943]

I'm impressed. Subbed

[@Greeneyetactical]

Glad you enjoyed it

[@TheWhiteHouseNuclearBunker]

Do you mind whipping up some sort of sheet we can use with all the information you deem necessary to find our zero that we can fill in and use on our own?

[@Greeneyetactical]

Any ballistic app will ask you for the information it needs to calculate

[@johnnottahcal5725]

Great info! I enjoy iron sights (while I still can) and my intended target is relatively small and can be located at close to moderately long range. I choose a 36 yard zero so my max bullet rise is about 4” at 200 yards. I like this zero with iron sights because I can lollipop a small target out to 300 yards. The closer the target, the easier it is for me to aim inside my target. At 300 yards I just put the very small target on the front post. At that distance I must confirm it’s really a groundhog and not a clump of dark earth. 😁

[@rosbertos]

Newbie to Ar-15's here and can't decide where to zero, so bear with me...just built my first AR and plan on using irons only (plinking/home defense/protection in a shtf scenario) so realistically will not be shooting at anything beyond 200, worst case. For those of us who don't have chronos or people who shoot a particular ammo because it was on sale in bulk and can't really flip flop between ammo brands, would the following process be viable to get a precise zero for irons? Step 1...zero irons at whatever distance..25, 32, 50, whatever. Step 2..mount a cheap scope, whatever is lying around..and zero that to whatever your irons are zeroed to. Step 3...strap the rifle (safety checked of course) into a lead sled or something of the sort and have a buddy out at 200 set paper (clipped top and bottom, no backer) so the bull is centered in the crosshairs, then again at 150, 100, 50 and zero distance without moving the rifle. Shoot at your close target and you get impact points on all your targets at the same time under the same wind conditions and so on, and can tweak your zero accordingly. Yeah, it's a bit tedious to set up but avoids shooting multiple groups at varying distances under changing weather conditions. Would this be a viable way of doing it or am I pissing into the wind with this idea?

[@Greeneyetactical]

You keep saying cheap. How much ammo have you used in the process you described? How does that compare to even a cheap shooting Chrony? Also, I don't think the very complicated plan you laid out will go according to plan.

[@rosbertos]

@@Greeneyetactical I haven't expended any ammo yet, as I just completed my AR build. I was looking for a do-able method for obtaining a practical zero with tangible, observable POI results without investing in a chrono or some atmospheric measuring device with bluetooth. With irons, I'm sure it's easier to sight on a target 25 or 36 or 50 yards vs 200...so I was thinking this could be a viable way to observe POI at 200 without having to actually try to sight at a target at 200. As far as this not going according to plan...would a sheet of paper every 50 yards affect the bullet flight enough to make a difference? Not being snarky, I'm asking because I usually shoot 150gr .308 and don't have experience with very high velocity 55gr bullets. I believe I only said cheap once, referring to the scope to be used as a zero verification device.

[@Greeneyetactical]

@@rosbertos Look, I did an hour and a half video on how to do something properly. You are saying "invest" in a chrono, on the low end you are looking at like $80 www.amazon.com/Caldwell-720001-Ballistic-Precision-Chronograph/dp/B00HTN5DTE/ref=sr_1_12?dchild=1&keywords=chronograph&qid=1575282243&rnid=2941120011&s=sporting-goods&sr=1-12 You don't need a bluetooth weather device. in a pinch, most ballistic apps (even the free ones) will automatically import weather data from the nearest weather station. This will still be more precise than the method you are laying out due to a removal of a large amount of human error.

[@DwnRange]

Yes, and here's the short version - (understanding that I no clue of the specs of your "built" AR15). From a 14.5" M4 rifle: (assuming ya shoot all these zeros out to the 300 yard mark) 25/300 zero = 8.5" spread highest to lowest impact on target 50/200 zero = 10" spread highest to lowest impact on target (w/ 300 being the real spread increasing point due to bullet drop) 36/300 zero = 5.5" spread highest to lowest impact on target Given "your" max 200 yard range the optimal choice for you is the 50/200 yard Santose zero which trust me will beat the 5.5" spread above and from the muzzle to 200 yards and everywhere in-between will be in the 3" spread range (no matter whether you are shooting 55grn junk Russian crap, XM193, 62grn M855, Barnes TSX 62 or 70grn or the SF Black Hills made 77grn MK262Mod1). ps - Note: I don't shoot crap/cheap/junk ammo in my rifles - so the spreads listed above are based on high mil-spec quality 55, 62, 70 and 77grn ammunition shot out of BCM, CMMG, Noveski high quality barreled ARs - YMMV.

[@ikemouser2580]

Great video. Without a doubt one of the most knowledgeable and LOGICAL trainers I've ever seen. Can you please add to the comments or link which items we need to purchase in order to create a tailored zero? I have access to AB software and a good rangefinder, I know I need a chronograph and maybe a kestrel meter but what else? THANK YOU AGAIN, INCREDIBLE VIDEO

[@Greeneyetactical]

That's on my list of things to fix on the videos, but until then- if you go to my Amazon Storefront, I have gear lists on there. www.amazon.com/shop/greeneyetactical

[@OlegStasyuk]

Great info, thank you very much!

[@eribertoacedo9505]

Been watching you for a little while very informative thank you very much.

[@Greeneyetactical]

Glad you enjoyed it

[@mr.rogers5586]

Have you ever cryogenically treated your barrel ?

[@shonuffisthemaster]

"quick video" look down and see over an hour, and im like "how much time does he need to talk about zeros" watches video, ohhh thats why.... why dosent this video have more views!

[@Greeneyetactical]

Glad you liked it

[@chaddkime8700]

Great video, thank you!

[@Greeneyetactical]

Glad you liked it

[@maxman-357]

Thanks for the class...Go Army! Will your optic zero be different fron your hard sights zero?

[@Greeneyetactical]

Yes, your Iron signs will usually be at a different height over bore (measured at the front sight post for irons) than your optic.

[@ung427]

I chose RIBZ, since it seems like the most practical. On the range I know where 100 yards is, set the disk back 6 clicks from 6/3, then at 6/3 - 6 zero for 100 yards adjusting the front site. At this given distance I then switch to the various number of clicks up and note how close they are to the markings on the drum.. Plus I'm zeroing a 20 inch barrel with the carry handle sight, and standard F-marked front sight. Otherwise, I've always zeroed at 100 yards, using a mildot scope, at the specific location, note the various hold overs for various distances. That's why I love the mildot scope.. There's no fixed BDC's on the reticle so you can always note what the drop is when you zero at specific locations. Of course for a given event the same ammo is used, as was used to zero, and note the hold overs.

[@Greeneyetactical]

All about finding what works for you

[@johnmerritt1094]

Great video… one comment on the Urban Tap ( I’ve never used it) but it’s my understanding it is designed for LEO in “Urban” areas Ie not shooting at 300 or even 200 yards so it’s performance is not spelled to apples and whom ever brought that ammunition to that venue obviously didn’t know what they were bringing. Mission specific ad you’re definitely award if applies to all things related.

[@noelgrably]

Thanks man, enlightening clip.

[@Greeneyetactical]

Glad you liked it

[@patriotrob7066]

I did the 36 300 and so far is accurate enough at 200 to plink off clay pigeons.. so I'm cool with that

[@Greeneyetactical]

All about finding what works for you

[@abstractapproach634]

I want a 2.6 (hob of A2 sites) eventually. Trying to dial it in at 64 (with so many approximated variables I figure guess and check will be the best way to find the zeros that give me that)

[@abstractapproach634]

Right now I cannot outshoot the weapon. pretty new to rifles but I like the Point Blank Radius as a free variable and finding the zeros to give me that would give me my best shot in an adrenaline filled expirience. I hope to find my Point Blank Range eventually, but I need to be able to get a decent group at a couple 100 yards with irons first

[@Greeneyetactical]

For this process- the trajectory is analyzed before the grouping. You measure velocity, environment, and critical rifle measurements and run it through software. Grouping just needs to be tight before the application of the zero can be made mechanically through sight adjustment.

[@abstractapproach634]

As a mathematician I am interested in studying these models and derivations. But like you said *gotta be able to get a decent group first* That's why I figure going through the above process and narrowing in on it based on my holdovers (plus it will help me more quickly adapt to different holdovers, and get a feel for maxima, far zero, pbradius, pbrange, with respect to near zero. Then I can compare the mathematical results (might make a decent paper, diving in from a mathematical perspective. I'm sure it cones down to differential equations ..... everything does. I'm just not quite sure the current model of drag, I know at low velocity it raises with it, but higher up it rises with the square of velocity. But once I look into it I'll know how to work with it

[@Greeneyetactical]

I would recommend picking up the Applied Ballistics book series by Brian Litz

[@earlemoore3639]

All I can say is excellent excellent excellent

[@lawrencewu3356]

In terms of your custom zero I'm not completely understanding the point of it. This is my take on things, hopefully it makes sense. You should likely go to some police documents and gather the data on the on the ranges at which shootings take place at and take the average of it. For simplicity, I am going to take your numbers from 50:22. So for my example, we will assume the avg shooting occurs at 50 yds. From there I agree that not all ammo is standardized so you would need to run a specific ammo out of a specific barrel length for this 50 yds range. Obviously, at this point we must then zero for 50 yds, the next part is where we disagree to a point. The shooter needs to know where all the holdovers/unders for various other ranges. In your example at 50:22 I dont really see an issue with having a 50 yd zeros as long as the shooter knows there is a drop of approx 11" at 250 yds and approx 5" drop at 200 yds. I do think the shooter does need to be aware of how much the shot drops, but I would say the same thing about the custom zero you created in the same time hack 50:22 at 32 yds. The shooter should know his/her drops at various different ranges as well. Given your background compared to mine I am going to say it is more than likely I am missing something and that I am in fact wrong here, I would just like to know how I am wrong. I opted for this public format bc I suspect other people might have this question too.

[@gunwrites6222]

Excellent. You certainly have your feces cohesives!! Best way to say ,"Thank you"... Liked & SUBSCRIBED

[@bobbyjoe6250]

If I laser bore sight my gun at 25 yards, where should I hit at 100 yards? Will I be low or will I be high at 100 yards.

[@jeffpraterJSF]

You will be more than 4 inches high at 100 yards with a 25 yard zero

[@nicholaddelioncourt7863]

The first sentence I had to pause and come down to the comments. " I just wanted to do a quick video here...". Quick? It's an hour 17 minutes long! Lol.

[@Greeneyetactical]

Yeah, sorry definitely wasn't planned. Just had a few slides and sat down in the morning. That was filmed in the first and only shot. Didn't know how long it was until it was over.

[@gunwrites6222]

Thought I own several AR-15s & AR-10s, I'm not a really a "tactical" guy, just an avid rifleman who shoots several calibers from several different rifles in each caliber, in several platforms, chasing the best performance I can get out of each weapon for the sheer fun and technical learning I get from it. Of course I also do it to fill the freezer but in all honesty I've never taken an elk past 115 yards so how fussy does one have to be hit vitals on a critter that large that close? That said I do try to record as much data as possible when I'm working out a load for a certain rifle/optic setup. Weather is a factor that plays heavily, making my data collection less consistent, my work more drawn out in time and rounds. I've never shot at an indoor rifle range which would eliminate the weather variable. As far as I know we've only had one in all of Montana and it didn't last long before the Gallatin County Sheriff's Office bought it out for their sole use leaving the shooting public out in the cold, LITERALLY.. Our tax dollars at work, the purchase wasn't even put up for a vote which caused much resentment in the local shooting community for being shut out on two weeks notice, some losing money on their season passes.. Whining aside, you did a great video here that likely opened many eyes and minds. I congratulate you on your fine work well presented and wish you the very best of success in your business.

[@charlesludwig9173]

If you want a bullet drop compensation function that syncs with the carry handle sight then zreo at 25 meters.

[@Greeneyetactical]

No, you missed the boat here and are completely wrong.

[@charlesludwig9173]

@@Greeneyetactical If the M4 or A4 is fitted with a detachable carry handle sight the bullet drop compensation function syncs from a 300 meter zero. And, since the trajectory of bullet will intersect line of sight twice, first at 25 meters and then at 300 meters this is how it is possible to sight-in at 25 meters to produce a 300 meter zero. And my creds are better than yours: Military Rifle Instructor assisting USAMU deliver SDM, TTT, and SAFS Training.

[@Greeneyetactical]

@@charlesludwig9173 Then you're a clown with credentials and have completely missed the boat here. Your comments are also completely irrelevant in the context of this video as it does NOT pertain to military weapons. In fact it specifically states WHY military standardized zeros DO NOT work for what we have in the LE/Civ world. You apparently have zero understanding of how and why the RANGE ADJUSTMENT DRUM will absolutely not provide the correct adjustments for LE/CIV. I have no idea why you are even talking about the M4, but you clearly have zero idea what you are talking about. Feel free to contact me directly or come by to visit if you need further instruction.

[@jamescarter4175]

Very interesting. Thank you.

[@wmmanjrz5011]

Woooo daymnnnn! Lookin good daddy green eye! 😍 Great video!

[@theprofiler8531]

Sorry but I had to turn the sound off. He said “right” over four hundred times and it drove me nuts. I just wanted to know if I should zero at 25 or 50 yards.

[@Greeneyetactical]

Right

[@sluggou812beotch]

I sighted my M16 dead on at 200 yds with bottom sights. Anything between 300 and 500 yds I'd flip up long range and either aim dead on for 300-400 or shoot for the head at 400-500. Totally contraditive to what USMC was teaching me and it worked for me.

[@santarsbuilders7905]

Thank you for this video🙂🙂👍👍+🤝🤝

[@shonuffisthemaster]

what do you recommend for a lpvo with a bdc? i realize the manufacturer wants you to zero at a specific distance (usually 100 yards) and then their holdovers are supposed to be "close" at the ranges, but with all the variables it seems like it might actually be better to have a custom zero and be within 3" at 300 yards or so and just ignore the bdc rather than relying on a bdc that might be wildly off depending on the factors.

[@Greeneyetactical]

I would suggest a standard Christmas tree reticle over a BDC. However if you have a BDC, I would recommend collecting data first, then analyzing it with a ballistic program. Once you can see the data you can decide what the best choice can be, whether it is a MPBR zero or whether you match the BDC's subtentions with the actual drop you calculate to determine what the holds actually match.

[@Jaynick1977]

Thanks this was very informative. A little over a year later since this video and with a dramatic change in ammo cost and availability how do you feel about zeroes in the current state? For instance, I can't go out and just buy the .223 ammo I would like to use but rather I have to settle for something that is close. Then of course my range ammo is different from defense ammo. Again not necessarily by choice, just availability or cost limitations. Do you think having a generalized zero is acceptable right now?

[@Greeneyetactical]

I don't do generalized zeros. But collecting data on any round you buy will save you guess work and wasted rounds trying to figure it out on the range. Data collection costs you 10 rounds

[@ryean1_aus]

49:30. Did you publish that study? I feel that's something for academia, that should be out there. LIke through ALERTT or COPS (DOJ) or something. Great video, a level beyond. Actual science backing it up. I feel that's a big gap in a lot of tactical whatever-shooting, CQB, etc. But at the same time it's then open-source knowledge. It's difficult to weigh up.

[@Greeneyetactical]

It is published on my website and a couple forums. There isn't any other publishing forum that is going to be equivalent to academia. Not in this industry.....

[@ryean1_aus]

@@Greeneyetactical Thanks mate. Appreciated.

[@daviddel991]

wow, great video! Thank you so much for the information.

[@BrokenTablesPodcast]

Correct me if im wrong but i could swear 36 yard zero is equal to 300 yard zero. Is it the meters-yards throwing me off?

[@Greeneyetactical]

I explain that in the video

[@michaelgregory5167]

Excellent presentation! One factor I found really distracting was the use of "right". So distracting that I found myself counting. I counted for one 10 min period and there were 47 "rights". Probably just my A.D.D. self. Meant to be be constructive.

[@Greeneyetactical]

Shot it cold at 0230 in the morning, so it was just right off the top of my head.

[@sha6mm]

When I sight in my Big Game Rifle I use a 8 inch MPBR so with my 6mm Rem so at 100 yards I’m 3 inches high at 200 yards 4 inches high and it’s 1 inch low at 300 yards. For what it’s worth my take is sight in at range, what do I mean above Rifle I go to 300 yards and sight it in there. What I have noticed is even sighting in at 100 yards on the bench you think you are dialed in but go to 300 yards on the bench and it’s not uncommon to be off a few inches off left or right even if you though it was correct at 100 yards, so I feel it’s very important to shoot at distance to know if you really are on. Bad news is you have to wait for a calm day. I do believe in MPBR because for Coyotes I use 3 inches so no higher than 1 1/2 inch. I just picked up a AR15A4 and plan on putting on a LPVO with ACSS reticle and. will sight it in at 300 yards on the correct post and closer will be verified at the 200 and 100 yards.

[@Greeneyetactical]

You have your answer- bench rest. It is very difficult to establish a true natural point of aim in the benchers position. Get in the prone supported if possible.

[@MrRbillharz]

I'm a fare weather target shooter but now I'm wondering if there is data for foul weather. Just how much does mist, light rain, heavy rain, or snow, effect a bullet at a given range?

[@Greeneyetactical]

At closer distances (inside 600yrds or so) the weather that will have the greatest effect will be temperature. This will change the velocity due to Powder Temperature. After that it will be the air density.

[@jefftaylor6487]

If you're an occasional shooter (once a week) and you primarily shoot the same ammo and you really don't have a chrono or radar, how would you go about zeroing? - would you zero at 200 and then work back to find if you're zeroed at 32 or 36? super informative video - thanks for being so through!

[@Greeneyetactical]

No, an occasional shooter will not have the fundamentals to group to a level of precision where the trajectory can be corrected from Point of Impact. Your results at distance will be off. Even a cheap chrono will aid in removing the human factor from the process to a large degree.

[@rontate7719]

Ammo Barrel sights Twist ..? Optic ?? Now watching The. 6 March 2021

[@JuanCastro-gz2jz]

So 32yrds is the sweet spot for a “combat zero” ? Will it do the same on a 16” barrel?

[@Greeneyetactical]

"Combat Zero" isn't really a thing.You have to collect the data and see if the distance is right for you.

[@robpetry84]

Dude, great video. I hate all the crazy claims that this certain "magic zero" will keep point of aim at point of impact to 500 yards. Thanks, subscribed.

[@5moonunit]

So I have a 16" barrel with 1/9 twist what do I zero at with a vortex 1×6×24 eagle?????

[@Greeneyetactical]

You need to watch the video

[@jonathans1472]

Thanks. An Hour and 17 minutes later and I don't have an answer except "it depends". With a 1x6 on a 16" AR-15, would you say 100 yards? Seems like part of the issue would be what one might consider expected distance of engagement more than things like barometric pressure and how many grains the bullet is?

[@Greeneyetactical]

"It Depends" was the whole point. All the variables matter. I wouldn't suggest a zero without looking at the data and then asking what your intended use would be.

[@thegoodsheperd1189]

Great video

[@meanerkat4339]

Maybe you should try some decaf.

[@Greeneyetactical]

That's crazy talk

[@wes326]

For a 36 yard zero, how low are the rounds at 25 yards?

[@Greeneyetactical]

Depends mostly on your Height Over Bore, measured to your Optic's centerline or for iron sights- the front sight post. Also to a smaller extent your bullet drop for what you are shooting in the given conditions. That being said- if you collect the data that is mentioned in this video and input them into most ballistics apps (like I say in the video), it will tell you what the POI offset will be at any given distance.

[@resolute123]

Hello. I'd like your opinion on something. I had zeroed my rifle with and optic at 100 yards with anticipation of a flatter trajectory from 25 to 100 with little hold over. However, when I fired my rifle at 25, I found that my shots were about 3 inches below from the bullseye. I'd figured if anything at closer ranges my shots would have been high and I'd have to hold lower as I was taught using the 25meter/yard zero that's what's to expect but the opposite happened when it was zeroed for 100. I know there's a lot of factors (ammo, barrel length, etc), but what are thoughts on actual bullet trajectory?

[@Greeneyetactical]

So, a couple things- 1: you established your near intersect at 100 yards. This puts your bullet below the line of sight from 0-100yards as it relates to height over bore. 2- Re-watch the video. My thoughts on trajectory are there

[@JohnProph]

its even better when they casually say "use a 25/300 zero" but they are talking about an AK! totally different bullet lol. good luck getting that 25/300 or 50/200 on a 7.62 x 39

[@Greeneyetactical]

yep

[@hunter6099]

What the best to sight in a 30/06? to keep it on up to 300? Thanks

[@Greeneyetactical]

Did you watch this video?

[@grahamhancock4904]

Yeah bro he needs a lot more than caliber to figure that out. I would however like to see some more generalized information about zeros that would work in a generalized way, as in having an average bullet speed for given caliber and barrel length to achieve a tight trajectory. Some good rule of thumb stuff to work from that isn't overly informative. Like I'd really like to know what a good tight trajectory would be for a PCC in 9mm with an 8 inch barrel, but this PCC was fed all of the ammo, every different kind lol. I guess it's time to download a ballistic calculator

[@fnds64]

In the example you used, did you zero the rifle at 32 yd and then determined the drops on the target? Did 32 yd come out from ballistic calculations? Sorry, maybe I missed that in the video. Thanks.

[@Greeneyetactical]

Yeah you missed it. The zero distance comes from velocity collection, environmental data and then ballistic analysis- its all in there.

[@fnds64]

Thanks. I spent some time playing with a ballistic calculator and ended up figuring it out. Very interesting.