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Sierra MatchKing .223 69 Grain HPBT Load

Discussion in 'Handloading and Reloading' started by Range Hound, Nov 6, 2009.

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  1. Range Hound

    Range Hound Member

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    I am working up a new load for my AR w/ a DPMS Mark 12 upper; 18" 1:8 twist. I have, as mentioned, the Sierra Matchking 69Gr HPBT and Hornady Match brass to start working up a load. I have some H335 but have read in other threads that the H322 does better for heavier 223 bullets. So, knowing that each rifle has a little different in taste, what is a good base load to start with?

    Appreciate your input.
     
  2. NuJudge

    NuJudge Member

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  3. Canuck-IL

    Canuck-IL Member

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    From John Holliger's of White Oak suggestions ...
    69 gr Sierra (overall length 2.25")
    Powder Type Grains
    Reloader 15 24.0 to 24.8
    This is my favorite load with the 69 grain bullet. It is extremely
    accurate and consistent. Very good velocity.

    Varget 24.0 to 25.0
    Very accurate. You may have trouble obtaining the velocity of faster
    burning powders. Also, Varget powder burns dirtier than Reloader 15.

    AA 2460 23.5 to 24.0
    Very accurate and excellent load. It is a ball powder, so it measures
    very well. No chronograph data.

    Hogdon 4895 24.0
    Shoots very well, but it does not meter very well, as it is a medium
    stick powder.
    /Bryan
     
  4. SSN Vet

    SSN Vet Member

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    My most accurate results so far with my 16" middy with a 1 in 9 twist are with 23 gr. of H335, a WSRP pushing the same 69 gr. SMK BTHPs.

    I've had a hard time tracking down H335 locally with all the crazyness going on, so I snagged a couple pounds of H322, but haven't tried it yet.
     
  5. ForneyRider

    ForneyRider Member

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    Benchrest Primer book had article on AR with 69gr SMK in Wylde chambered long barreled rifle.

    H322 was one of the better powders in the list. The article is somewhat old and didn't have Varget or VV powders.

    I use AA2230, R15, and Varget for 69gr SMK and 75gr Hornady BTHP. I like AA2230 because it is easy to measure, cheap and made some very consistent loads. 23gr for any of the these powders should do quite well. I've gone as high as 26.5 with R15 and Varget, but performance was down. Velocity was over 3000fps in 20in barreled AR in the max loads.

    Try mag length (2.26in OAL) and then single shot length (varies by rifle).
     
  6. ZX10Aviator

    ZX10Aviator Member

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    IMR 4198 is my most accurate .223 powder
     
  7. Kernel

    Kernel Member

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    [​IMG]
    According to my modified Powley Computer a powder like Reloader 15 or IMR4064 would be ideal. If you choice is ONLY H335 or H322, then go with H335, it's slower, but it's still way to quick for best results. 1:8 twist is plenty fast, should work fine. Greenhill calculation says 1:10 is adiquite.
     
  8. flashhole

    flashhole Member

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    Some good info here. I like 4895 (IMR or Hodgdon) and Varget. BL-C(2) is a good substitute but not quite as consistent as the others I mentioned.
     
  9. Redneck with a 40

    Redneck with a 40 Member

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    +1 on the IMR4895, not the fastest velocity, but very accurate. This powder shoots the tightest groups in my Mini-14, 2.5" at 100 yds pretty consistently.
     
  10. JDGray

    JDGray Member

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    Couldn't get 69SMKs to fly good out of my 8" twist RRA. 60gr Sierra Varminters over 24gr of H335 shoot very good at 100yrds, .5" for 5 shot groups, and right around an inch for 10 shots.
     
  11. Range Hound

    Range Hound Member

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    Kernel, does your modified Powly allow you to change the barrell length to 18"?
     
  12. Kernel

    Kernel Member

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    Range Hound,

    Not a problem. Should of caught that first time around.
    [​IMG]
    Bullet length, cartridge length, and cartridge capacity can all have significant impact on powder selection. I've assumed those numbers in this model, since I don't have your specific bullet, action/magazine/throat, or brand(s) of empty cases to measure and average. Let me know if you'd like to see some other values plugged-in for those.

    I think it's interesting that my mathematical model is in agreement with Canuck and this guy John Holliger (whoever he is). Reoloader 15 is the way to go. It’s satisfying to see validation of my equations and methods from real-world shooters. The beauty is I never had to fire a shot (leave my couch, try nineteen other loads that didn‘t work, or even own a .223), and I already have the makings of a promising Pet Load.
     
    Last edited: Nov 16, 2009
  13. Range Hound

    Range Hound Member

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    Kernel,
    Where did you find the modified Powley Computer, this looks like a great program. Thanks for the help.
     
  14. Kernel

    Kernel Member

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    The program is my own creation. It's just a MS Works spreadsheet, and I tweak on it constantly. If my time was worth ten cents an hour I would of been WAY ahead buying a commercial program like Load-From-A-Disk.

    But it's been fun making my own. It does exactly what I want, and displays it how I want to see it. I might add a momentum scale next. See how that compares to the other performance indicators.

    There's a free online Powley Computer here:

    http://kwk.us/powley.html
     
  15. Bear2000

    Bear2000 Member

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    24.5 grains of Varget with a 69 SMK does the trick for me in my bolt gun. Just loaded 50 rounds tonight with Lapua brass and CCI BR primers. I've had groups as small as .3" w/my Savage 12FV, and I'm a lousy shot.
     
  16. Canuck-IL

    Canuck-IL Member

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    FYI ... he's the owner of White Oak Precision - very popular highpower builder and many time IL state HP winner.
    http://www.whiteoakprecision.com/
    /B
     
  17. Runningman

    Runningman Member

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    Thanks for the information in this thread. I ended up shooting some of my best groups to date last weekend out of an older Colt HBAR. Using the 69 grain SMK and 24.2 grains of Reloader 15.
     
  18. Fatelvis

    Fatelvis Member

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    Reloader 15 24.0 grns, Rem 7 1/2 primer
     
  19. ILikeLead

    ILikeLead Member

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    My experiences with a 1 in 9 twist varminter were 2-3 MOA groups with 4064(not acceptable) and 1.1MOA groups around 25 grains of varget and 1.1 MOA can't remember how much of R15. My last hope is IMR4895 which is loaded and ready to shoot when the wind lays!

    YMMV
     
  20. Rokman

    Rokman Member

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    I have had good results with RL15, Varget, and Tac.
     
  21. mm1ut1

    mm1ut1 Member

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    My RRA shoots 69gr SMKs with excellent results with 1 in 8 twist. It hates 55 gr, but shoots 53 gr almost as well as the 69gr. Go figure............
    BTW I use Varget for powder.
     
  22. dboyles

    dboyles Member

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    I'm just getting started reloading, but I've had good luck with 22.7gr of H335 behind a 69gr SMK out of my 16" AR-15 (LaRue Stealth with a Lothar-Walther 1:8 barrel). Sub-MOA five- to seven-shot groups at 100 yards are par for the course if I do my part. I hope to see even more consistency once I perfect my reloading scheme and get some good brass.

    I've had good results with Varget too, but the H335 seems to be a hair better in my very limited testing so far.
     
  23. dc.fireman

    dc.fireman Member

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    In my exactly one year of reloading, I've used the following powders for my 69 gr. SMK's:

    Varget - 24.0 to 25.0 gr. I have several batches, which I steadily increased, and I have no intentions of going further - I get great accuracy from the 25.0 gr loads, and really good accuracy from the 24.2, and 24.5 gr. loads.

    IMR 4895 - I had initially bought two different powder types, and gave this stuff a try.

    I had some phenomenal (to me anyhow) shooting using 22.7 gr. of 4895. 3 shot strings touching each other, at 100 yards, and covered up by a US Quarter at 150 yards. These are from two sandbag rests, and not quite rapid fire, but not the cooling down/cleaning in between each shot either.

    The rifles used were:

    My old reliable 16" Rock River Arms Elite Car A4, My project rifle I built for my son which is an 18" Larue Stealth Sniper upper on a Tactical Innovations lower, and my Steyr Jeff Cooper Scout rifle. The COL were at 2.260", and I used pre-primed Remington cases in the Varget and 4895, and just the Varget in some Lake City once fired cases with a CCI 400 primer. The Remington pre-primed cases provided better overall accuracy, possibly because they were brand new, or I haven't developed great case prep skills yet. I'm still trying to learn this art myself. I hope the info is useful to you - have fun and stay safe.

    -tc
     
    Last edited: Feb 12, 2010
  24. win308

    win308 Member

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    For years the Camp Perry match load was 24.5 H4895, gi cases, Remington or Winchester primers and the 69mk for the AR-15 service rifle. Still hard to beat that load today with an AR.....consistant and accurate over the course.
     
  25. HKGuns

    HKGuns Member

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    Interesting thread and timely. I just cranked out my first 50 .223 AR reloads this afternoon. Used 24 grains of IMR 4895 over a 55 grain Sierra pill. Can't wait to try it out.
     
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