Gun Number for Wind Calls! Detailed Video!

Learn how to use your rifle's gun number to make fast and accurate wind calls out to 800 yards.
Watch Caylen as he works out the wind call for three different targets from 500 to 700 yards using a 308 Winchester.
Gun number is simple, but it takes practice to get it right. If you want to learn more on Gun Number, head over to our social network at www.moderndayrifleman.com
You'll find a super awesome community of discerning shooters there, as well as our monthly training subscription service and all of our digital masterclasses.

[@BobbyDucati1]

Revisiting this video for third time after couple classes and better understanding of how Gun# works , feels good having things start to CLICK in my brain now . Lots to learn still . Thanks to everyone that helped me along .

[@RO6BR]

Great refresher! Thank you for all the training you make available. I’ll definitely be making it to another course soon.

[@instrutorserra5977]

Excellent content!!

[@flea-kh7om]

Good job!

[@comloz]

Awesome video Caylen!

[@InfoNotWars]

Thanks man. Always enjoy

[@damagedgoods62]

Another GREAT Vid Caylen!

[@dougearl742]

Great info! Thank you!

[@BestICan]

Great video. Love the SKMR.

[@georgekirby3361]

Outstanding thank you.

[@user-hv4gx9bw9l]

Great video! Thank you, Gus

[@tylarhaugan7908]

Iv been looking for this video,

[@VA_Aggie]

Awesome stuff, it's nice seeing this applied in real time!

[@cs7285]

Thank you

[@toddb930]

Man, I love these examples! Thanks so much! 😁👍

[@danielchambers1958]

Great info my friend….. thanks

[@AlecLCochran]

Awesome demonstration of using the wind number! Thanks for putting this together for us.

[@doncarnage3539]

MORE!!!

[@Ratchety]

Great video, thanks for the content! Gun number has definitely helped me make wind calls at competitions.

[@PrecisionRifleNetwork]

Good video and info. 👍

[@MODERNDAYSNIPER]

Thanks 👍

[@Chasehess]

Outstanding !! Love these wind call videos your making . Mixing coyote hunting and long range on my channel & love watching you guys ! Awesome content

[@DRHODES1979]

Great video! Cool being able to see the bullet in the sun when you were shooting the 700 yard plate.

[@jonhelton5226]

Outstanding instructional video. The beauty is in the simplicity. Will be applying this next trip to the range. Thank you!

[@walkerscountrylife]

There's one O in zero. Lol, love that Caylen! 😂

[@kevinh4631]

Excellent visual application of wind values in real rime. Way easier to understand this with the visual than just listening on a podcast.

[@garridoser]

Is amazing the stabilitation that you can reach on your shight. You make look it easy shoot to the blank through your scope! Congrats sir

[@RangerCaptain11A]

i appreciate the 'in your head, in your scope' teaching. phil did something like this at his class. so helpful. i paused the video after you gave the data to figure the call.

[@popadop91]

Awesome video learned so much in that short video about calling wind, Thank you!

[@MODERNDAYSNIPER]

Glad it was helpful!

[@esther12q]

Very helpful, though I’m still drinking from a firehose. You guys should come to Alaska for training. You won’t regret it!

[@kenneth5328]

I feel you were speaking English, but..... Lol I've got so much to learn!!!

[@mikehawley43]

Where can I find a more academic instruction of the math involved? I don't know what '5mph gun' means

[@KCYO0311]

I’m shooting my first match coming up, loved how you explained this because you shooting a 308 and a “5mph gun” actually fit me perfect because that’s what I have. You just made the learning curve that much easier for me because I was honestly struggling on how to stream line my wind calls/holds since all I dial for windage is for spin drift and I do holdovers for wind. This is golden content.

[@MODERNDAYSNIPER]

Good to hear! Be advised: no one that I know dials for spin drift, unless you're shooting a fast-twist 308 that requires it.

[@KCYO0311]

@@MODERNDAYSNIPER good to know, no I have a slow twist 1:12 on an AI barrel. I’d like to eventually get into a pre fit 6.5CM and ditch the 308. I also joined MDR and I’m loving it. You guys are awesome. One day I’ll come up with the cash to go to a course of yours!

[@williamsweet7511]

I have a question for you, would you or anyone on here buy a tripod such as the leupold or vortex that comes as a kit for say 1k or would you go with fat boy or vet ? can't remember their name. where you buy the pieces separate and it cost around 1300 to 1500. I make a good living and LOVE shooting but 1500 seems like a lot for a tripod. Any suggestions would be greatly appreciated, I'm new to expensive tripods and tripod shooting.

[@LifeisGood-ye8rl]

What action and chassis is that? Looks like Krg whiskey

[@MohammedAkoojee]

Nice one Caylen. How many inch barrel are you running on the 308 and what speeds you getting?

[@MODERNDAYSNIPER]

Got you in the network! 🤘

[@desperado8605]

Awesome video I can do this all day when I'm training that buzzer goes off and my brain goes to mush

[@MODERNDAYSNIPER]

Make this plan ahead of go-time. Write the wind holds down so you can remember them. Eventually you'll be able to do this on the fly.

[@desperado8605]

@@MODERNDAYSNIPER yeah I really need to get the timer out more when I shoot. Thankfully my new scope should be here today so I can actually hit the range again

[@user-ii3bx7ww8f]

Do you do training courses on line that list all formlas

[@RO6BR]

Yes, and they are almost as good as in person. You might wear out the replay button. This is a golden ticket.

[@azoneoutlaws]

I’m still a lil confused. Would love to see some more videos of this.

[@MJTORN]

What chassis is that ?

[@jamesmooney5348]

👍

[@cfm6229]

howbout showin how you would dope it out on paper too!

[@homicidalplatypus1]

I really like how this system works for estimating a wind call, unfortunately all my optics are MOA. Is there a simple way to adapt wind number to moa?

[@maddan.]

Just work it out in MOA.

[@MODERNDAYSNIPER]

Your MOA hold should be half of the yardage in hundreds. IE: 400 yds your wind should be 2 MOA, 500 yds it should be 2.5 MOA, 600 yds it should be 3 MOA.

[@earlgilliland6501]

Caylan, this may be a dumb question, can you the gun number be used with a moa scope , thanks

[@MODERNDAYSNIPER]

Not a dumb question at all, and the answer to your question is YES! It's a simple modification to the formula and MOA shooters have one small addition. Take your range to the target in hundreds and divide it in half. That number is now the MOA hold. IE: 200 yards becomes 1 MOA, 300 yards becomes 1.5 MOA, 400 yds becomes 2 MOA, etc. Look at 600 yards (3 MOA) and adjust your wind speed until you have 3 MOA of drift at 600 yards. This should fill things in nicely, but a word of caution that MOA numbers won't be exact like Mils.

[@1mykah]

I thought your gun number is the BC number from either G1 or G7. How did you get to .7. I'm learning, so any help would be greatly appreciated.

[@BlueDevilBrew]

Gun number is the first number of your bullet’s G1 BC. This .308 is a 5mph gun, which means he’ll add 0.1 to his wind hold per 100 yards at a 5mph wind. For the first shot at 660 yards (rounded to 700), that’s a 0.7 mil hold per 5mph.

[@1mykah]

@@BlueDevilBrew Epic, thanks Blue!!!

[@Jordan882007]

What is the 308 suppressor you are running there Caylen?

[@MODERNDAYSNIPER]

It's a Thunderbeast CB7

[@Don_LM]

Can someone explain what 5 mph gun means ??

[@pstewart5443]

When theres that much wind, I just pick a hold and hope, especially in my 308.

[@MODERNDAYSNIPER]

Or, you could apply the systems in the video and stop hoping.

[@adamdyment9732]

im still struggling to figure out what gun number is. i think i need a simple definition that i can build from there. it still just doesnt make sense. any resources would be appreciated

[@MODERNDAYSNIPER]

Follow the link in the description and cruise over to the network. Tons of info on this subject there.

[@tylermertz7095]

Do you have a ballistic calculator app on your phone? Using his 308 as an example, assume he's shooting a 176gr A-tip at 2650fps at 4000' elevation. A 5mph wind gives a wind correction of ~0.1mil at 100yds, ~0.2 at 200yds .... ~0.7 at 700yds. That means it's a 5mph gun. If you used a 6.5CM rifle instead you'd have to use maybe 7mph to get the 0.1mil, 0.2, etc corrections at the same yardages which means it's a 7mph gun. Gun number will mainly be based on bullet, muzzle velocity, and altitude.

[@mr.nobody68]

@@tylermertz7095 that makes no sense whatsoever. It sounds like you're just using a random wind speed which is giving random wind holds for the caliber. You're saying that a 5mph wind on a 308 gives a 0.1 correction. But you would need a 7mph wind to get the same correction from a 65c. That's a caliber specific number. Not gun specific. This gun number thing is all Greek to me but, it sounds like Open up one box of ammo Put one cartridge into identical guns. Down to having sequential serial numbers made on the same day You're going to get 2 different gun numbers because they're 2 different guns. I've been looking everywhere I can think of to try and understand it, and it makes zero sense to me

[@jakinator01]

Gun number = full value wind speed required to shift 1 mil point of impact at 100yards So, if 5mph (full value) moves your point of impact .1 mil @100y, then you have a 5mph gun. If 5mph wind moves point of impact .2mil @ 200yds, you still have a 5mph gun (because it’d still be .1 mil at 100y, .2@200, .3@300). Examples: A) 12mph full value wind where poi shift is .1mil @ 100y = 12mph gun B) 12mph shift .2mil @200 = 12mph gun C) 10mph shift .1@100 = 10mph gun D) 10mph shift .3@300 = 10mph gun E) 7mph shift .1@100 = 7mph gun So, at 500y, with a full value wind of 5mph on a 5mph gun = .5mil poi shift. (.1@100, .2@200, .3@300, …) Then, if winds increase to 10mph on the same 500yd target with the same 5mph gun, then you’d need 1.0mil shift. (.2@100, .4@200, .6@300, .8@400, 1.0@500) Effectively, the better your gun is at cutting through the wind (higher BC & higher velocity), the higher the number. AKA, a 10mph gun will need half of the wind correction of a 5mph gun.

[@brenthanson894]

At 8:12 you can watch the bullet travel to the target. 👌🏻

[@shavintra]

So youre teaching the Hoddnet way? Value of the bullet to make your wind call number.But in yards.Thats interesting.

[@MODERNDAYSNIPER]

The Hodnett way? Never heard of her...

[@shavintra]

@@MODERNDAYSNIPER hahahaha!!!Well as the "modern day" sniper you are,and seeing how you did a DVD set back in the day with him with magpul,ide say it's strange you'de say something like that.But either way,pretty plain to tell what method you're using,even if it's using it in tard yards to make it work for the competition circuit crowds.Just saying it's toooootally obvious for anyone that's been taught the method where and who conceived it and figured it out to help evolve the community.Which is what you're doing,so keep it up man.Sniper Jesus would be proud in way I think.Imitation is the highest form of flattery..😎👍

[@charlesludwig9173]

660 divided by 100 equals 6.6 times full value 5 mph wind equals 33 divided by 10 MOA wind constant equals 3.3 MOA or 21 inch favor.

[@MODERNDAYSNIPER]

Sure thing man, you do you!

[@charlesludwig9173]

⁠@@MODERNDAYSNIPERWhat, you think you invented this stuff? The MOA wind constant formula has been taught since the 2nd World War. Faster than what your doing and more accurate. I used it to earn American High Power Rifleman Award in Long-Range. What have you won lately?

[@uteshooter]

What do you mean by "It's a 5 mph gun"?

[@MODERNDAYSNIPER]

Come over to the Modern Day Rifleman network and you'll learn.

[@beauderoy7745]

Can someone explain the “5 mph” gun to me?

[@cs7285]

Would you say a 100 yard zero is the zero to use?

[@MODERNDAYSNIPER]

Always

[@Whitehawkvisionfilms]

FYI- Your competition day gear video is NOT savable to a folder bc of its Child Settings. Great stuff and wanted to save it

[@DLN-ix6vf]

well that's good for your gun BUT what about mine ? we need a video that gives us the basics for any rifle then we can adapt

[@politicallyinsensitive4200]

No idea what're fuck you're talking about when you say "5mph gun" and you run through it way to fast for me to do the windage formula. Great watching you shoot though.

[@comloz]

You need to do your homework

[@samuelweaver9308]

Frank Galli explains it well in his book. They also did a video on it recently.

[@MODERNDAYSNIPER]

Follow the link in the description and do some “fucking” homework. ✌️ Great having you as a follower.

[@tylermertz7095]

Do you have a ballistic calculator app on your phone? Using his 308 as an example, assume he's shooting a 176gr A-tip at 2650fps at 4000' elevation. A 5mph wind gives a wind correction of ~0.1mil at 100yds, ~0.2 at 200yds .... ~0.7 at 700yds. That means it's a 5mph gun. If you used a 6.5CM rifle instead you'd have to use maybe 7mph to get the 0.1mil, 0.2, etc corrections at the same yardages which means it's a 7mph gun. Gun number will mainly be based on bullet, muzzle velocity, and altitude.

[@politicallyinsensitive4200]

@@tylermertz7095 so it's which ever mph in wind speed correlates to a 0.1 mil adjustment per 100yds? Maybe I'm just that clueless about it but it feels like a solution looking for a problem and someone wanting to sound Gucci. A term used for a singular point of reference like this...just seems useless

[@dlpogge]

You need a lot more explanation. You are throwing out a lot of numbers very fast and not explaining what the variables are and what the calculation is. It is clear that it seems “super simple “ to you, but that’s because you know it so well. If you really want to teach it to us you need to go slower and explain more. Thanks.