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.223 bullet drop/windage cards?

This is a discussion on .223 bullet drop/windage cards? within the The Ammo Can forums, part of the Armory Talk category; Anyone know where you can find bullet drop/windage cards for the .223? i saw some somewhere, but it was a while back and I don't ...


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Old 11-15-2006, 11:57 PM   #1
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.223 bullet drop/windage cards?

Anyone know where you can find bullet drop/windage cards for the .223? i saw some somewhere, but it was a while back and I don't remember where it was. It was a smaller laminated card, and I believe based on the 68 gr bullet for bullet drop and windage adjustments. Looking to learn a little more with shooting my AR, and one of these would be really helpful.

Ok, so I know you can find ballistics info on most manufacturer websites, but I guess what I'm really wanting to know is "average" drop, or drift. Is there a formula for figuring out how much more drift you will get at 20 mph, vs 10 mph? and up? I've got the ballistics chart for one of the rounds I shoot, but I don't know what there is for detemining drift at different wind speeds, or even bullet rise due to heat.. is there an average change in height a bullet will typically raise if firing over hot ground? I thought I read somewhere that a bullet typically will fly 4 inches higher over hot ground, especially when mirage can be seen.

The ammo I've been purchasing is American Eagle .223 REM, 55 gr. fmj boat-tail AE223.

This is what I will be shooting most, as it's the most cost effective for me at the moment, and easy to get. I'd shoot wolf.. but everyone says to stay away from that with an AR. I can purchase 500 rounds of wolf for $89.

Last edited by jednp; 11-16-2006 at 02:08 AM.
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Old 11-16-2006, 02:41 AM   #2
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Old 11-16-2006, 07:14 AM   #3
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You can probably make your own. Check out http://www.ammo-oracle.com/ for everything you want to know about AR15 ballistics and you can find answers to additional AR15 Ammo related questions on AR15.com.

But I think your best bet would be to get the ballistics from the manufacturers website and compare them to what ballistics you're actually getting. From there it would be easy to make up an index card of the drop of m193, wolf, BH 69gr Match, or whatever at a given range.
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Old 11-16-2006, 07:18 AM   #4
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Federal's website has convenient charts that can be easily printed and/or used to create your own cards. http://www.federalpremium.com/ballis...mo_Search.aspx
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Old 11-16-2006, 10:55 AM   #5
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Could also check here:

http://snipercountry.com/
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Old 11-16-2006, 11:49 AM   #6
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A good quick reference for the AR's are the military TM's & FM's. TM 9-1005-319-10 covers the basics for balistics and windage for the M-16 A2. A quick search on the internet will find you any of the TM's/FM's or you can download them from the Army's website.
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Old 11-16-2006, 12:00 PM   #7
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After the holidays I'll be putting together an external ballistics calculator for use with Mil-Dot scopes... for PalmOS.
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Old 11-16-2006, 12:52 PM   #8
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well I've printed out the ballistics from the federal site on the ammo i currently use. I just am curious really about how wind changes trajectory. I know with a 10 mph wind, at 100 yards it will drift 1 inch. 200 yards 4.3 inches, 300 yards 10.2, 400 yards 19.2, 500 yards 32.7.

But what I am curious about, is what does a 20 mph wind do? is there a formula, say the wind speed goes from 10 to 20 mph, does the drift multiply by 2? and 30 mph, by 3? I was searching like crazy to try and find that last night, and I couldn't find it. Maybe I'm just not typing in the right thing when I search. I guess I just want a rough estimate on how much increased wind speed might change it.
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Old 11-24-2006, 07:52 AM   #9
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Jed buddy, you just double it for 20mph, triple it for 30mph, multiply it by 1.5 if it's 15 mph, etc. What you have to realize is that those values are for a full crosswind. Most of the time you won't have a full crosswind, so you need to take this into account. If it's only coming in at 45%, then you need to only use half of that value, etc. Also realize that when you are shooting over a distance or near certain topographical features, you'll soemtimes experience swirling or changing wind. This is easiest to see by watching the mirage that comes up off of the ground through your rifle scope, and changing the parralax to see how it changes (if it does) over different distances. When wind is swirling and changing is when it gets tricky. As you do more shooting with cards, you'll learn that you can account for the drop every single time, but reading the wind is where things get tough sometimes, especially with a lighter bullet like a .223. Best of luck to you and hope that helps clarify things for ya. Oh yes, and here's a link I saw that showed some ballistics info confirming this. http://www.exteriorballistics.com/eb.../pdf/hgy02.pdf
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Old 11-24-2006, 02:00 PM   #10
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This what you're looking for
http://www.ballisticards.com/

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