ballistics "click" table for 69gr. 223 20" brl AR?

[Bullseyelr]

I have a RRA varmint AR with a 20" SS bull barrel w/ 1:8 twist. I bought a few boxes of Black Hills red box 69 grain ammo and had <span style="text-decoration: underline">excellent</span> results with it at 100 yards. I have a Leupold mark 4 on it with 1/4 MOA adjustments. I am looking for ballistics info (click adjustments out to 600 yards or so) for this ammo with the barrel info and 1/4 MOA adjustments so I can make a card to tape to stock to get close to target and fine tune the info as I go. Would anyone have any of this info with a 100 yard zero? Any help would be greatly appreciated.

 

[AlabamaShooter]

Re: ballistics drop table for 69gr. 223 20" barrel AR?

JBM balistic calculator. Enter in your information and it will give you a table.

Link:

http://www.jbmballistics.com/cgi-bin/jbmcard-5.1.cgi

 

[Wheres-Waldo]

Re: ballistics drop table for 69gr. 223 20" barrel AR?

What is your velocity, specific bullet type, sight height.

Also, any specific atmospherics you want this calculated in?

http://www.jbmballistics.com/
With that, you can do it yourself...for free

 

[Bullseyelr]

Re: ballistics drop table for 69gr. 223 20" barrel AR?

I dont have any info such as velocity or anything like that. I am just looking for an estimate on clicks from 100 yards to 600 yards. I have click adjustment info for my 308's from balistic cards I got from a friend and they get you within a few inches of the target. Then I can fine tune it to get the rest of the way. Need 1/4 MOA adjustment info.

 

[Bronco]

Re: ballistics drop table for 69gr. 223 20" barrel AR?

69's to 800 is a pipe dream, maybe 600. Velocity is needed for an accurate range card, would guess they are running in the 2750 to 2800 range.
rough come ups are:
200 1.4 moa
300 3.9 moa
400 7.1 moa
500 10.9 moa
600 15.5 moa Velocity down to 1475 fps
700 20.9 moa
800 27.5 moa Velocity at 1130

 

[Bullseyelr]

Re: ballistics drop table for 69gr. 223 20" barrel AR?

anyone have any different info?

 

[Bronco]

Re: ballistics drop table for 69gr. 223 20" barrel AR?

Take moa info provided and multiply by 4 and you will have the 1/4 moa click value.

 

[Afghanvet09]

Re: ballistics drop table for 69gr. 223 20" barrel AR?





+1 for JBM. I bought a ballistics program to use data to create my ballistic series booklets and crossed checked with JBM simplified and almost identical. JBM will give you a good initial zero that you can fine tune to a true zero. The key is feeding the right data into it to begin with.

 

[Redmanss]

Re: ballistics "click" table for 69gr. 223 20" brl AR?

Your accuracy is only going to reflect what you enter. If you don't have the capability of getting your muzzle velocity, then your only option is going to be guessing, then playing trial and error with accurate data on target in the field. You can then develop and tweak a ballistics card for different conditions using JBM.

I know ballistic computers can me intimidating at first, but really they're simple once you gain an understanding to how they work. Read the articles Lindy has on his website for some really good info to get you started on the right track:
http://www.arcanamavens.com/LBSFiles/Shooting/Downloads/References/

 

[wrhunter]

Re: ballistics "click" table for 69gr. 223 20" brl AR?

Here is the dope chart from my SHOOTER profile. This is for my Rock River A4 Varmint upper 20" Bull 1:8 twist. This is my handload using 69smk or 69Nosler CC / 25g Varget / LC Brass / BR4 primers/ Seated 2.255"

Muzzle Velocity approximately 2860fps. BH could be going faster. Ups are in MOA

For whatever it is worth to you...

Its a little cluttered but the first 3 columns are range, drop, ups/adj in MOA


Sight Height: 2.75 (in) Zero Range: 100 (yd) Barrel Twist: 1:8.0"; Right Elevation Correction Factor: 1.0 Wind Correction Factor: 1.0
Bullet Diameter: 0.224 (in) Bullet Weight: 69.0 (gr) Bullet Length: 0.9 (in) Muzzle Velocity: 2860.0 (fps) Atmosphere Std: ICAO Drag Model: G7
Altitude: 679.0 (ft) Temp: 55.0 (F) Relative Humidity: 72.0% Pressure: 29.66 (inHg) Wind Speed: 6.0 (mph) Wind Angle: 3.0 (clock)
Target Angle: 0.0 (deg) Coriolis Effect: N/A

Range (yd) Path (in) Path (moa) Drift (in) Drift (moa) Velocity (fps) Energy (ft-lbs) TOF (s)
0 -2.7 0 0 0 2860 1253.1 0
25 -1.6 U6.2 0 R0.1 2790.9 1193.3 0.027
50 -0.8 U1.5 -0.1 R0.3 2724.2 1137 0.054
75 -0.2 U0.3 -0.3 R0.4 2657.6 1082 0.082
100 0 0 -0.6 R0.5 2592.3 1029.5 0.11
125 -0.1 0 -0.9 R0.7 2528.4 979.4 0.139
150 -0.5 U0.3 -1.3 R0.8 2464.9 930.8 0.169
175 -1.3 U0.7 -1.8 R1.0 2401.8 883.8 0.2
200 -2.4 U1.2 -2.3 R1.1 2340.3 839.1 0.232
225 -4 U1.7 -3 R1.3 2279.4 796 0.264
250 -5.9 U2.3 -3.8 R1.4 2219.2 754.5 0.298
275 -8.3 U2.9 -4.6 R1.6 2160.5 715.1 0.332
300 -11.2 U3.6 -5.6 R1.8 2101.8 676.8 0.367
325 -14.6 U4.3 -6.6 R1.9 2044.8 640.6 0.403
350 -18.5 U5.1 -7.8 R2.1 1988 605.5 0.441
375 -22.9 U5.8 -9 R2.3 1932.8 572.3 0.479
400 -28 U6.7 -10.4 R2.5 1877.7 540.2 0.518
425 -33.6 U7.5 -11.9 R2.7 1823.6 509.5 0.559
450 -39.8 U8.5 -13.6 R2.9 1770.6 480.3 0.6
475 -46.8 U9.4 -15.3 R3.1 1718 452.2 0.643
500 -54.6 U10.4 -17.3 R3.3 1665.9 425.2 0.688
525 -63 U11.5 -19.3 R3.5 1615 399.6 0.733
550 -72.4 U12.6 -21.5 R3.7 1564.1 374.8 0.781
575 -82.6 U13.7 -23.9 R4.0 1514.5 351.4 0.829
600 -93.8 U14.9 -26.5 R4.2 1465.3 328.9 0.88
625 -106 U16.2 -29.2 R4.5 1417 307.6 0.932
650 -119.3 U17.5 -32.1 R4.7 1369.3 287.2 0.986
675 -133.6 U18.9 -35.2 R5.0 1322.8 268.1 1.041
700 -149.2 U20.4 -38.5 R5.3 1277.2 249.9 1.099
725 -166.3 U21.9 -42.1 R5.5 1232.3 232.6 1.159
750 -184.7 U23.5 -45.9 R5.8 1188.6 216.4 1.221

 

[wrhunter]

Re: ballistics "click" table for 69gr. 223 20" brl AR?

Just checked the Black Hills site and they list 2850fps. Not sure what length barrel that is out of though.

 

[Afghanvet09]

Re: ballistics "click" table for 69gr. 223 20" brl AR?

So they can bump the velocity #'s up, a lot of those factory velocities are from 24" and not 20" barrel. Also even with same length barrel, when using is it 15 ft or 75 ft where velocity is recorded? AR's also have lots of different sight combinations and heights between rifles may be different, this too affects calculations. All errors in data entry (however slight they may be) can have cumulative effects and skew results.

It's not that hard to utilize a program like that, but it's not that simple either - you have to collect accurate data to input first to get good output

 

[wrhunter]

Re: ballistics "click" table for 69gr. 223 20" brl AR?

Agreed.