Sierra MatchKing .223 69 Grain HPBT Load


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Range Hound
November 6, 2009, 09:55 PM
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.

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NuJudge
November 7, 2009, 02:34 AM
I did not get anywhere with a 1:8 barrel and 69gr SMKs with H335. I have used IMR4895 with good results.

Some other places you might want to look are:
http://www.usrifleteams.com/forums/index.php?& (you'll have to register)
http://radomski.us/njhp/
http://www.shootingtimes.com/ammunition/st223_120606/index.html
http://www.northfloridashooting.com/Misc/Reloading%20for%20the%20AR15.htm
http://www.whiteoakprecision.com/info-reloading.htm

Canuck-IL
November 7, 2009, 05:39 AM
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

SSN Vet
November 8, 2009, 09:43 PM
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.

ForneyRider
November 12, 2009, 06:17 PM
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).

ZX10Aviator
November 13, 2009, 01:35 PM
IMR 4198 is my most accurate .223 powder

Kernel
November 13, 2009, 06:37 PM
http://images5a.snapfish.com/232323232%7Ffp63237%3Enu%3D3645%3E%3A57%3E257%3EWSNRCG%3D32538%3A6458348nu0mrj
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.

flashhole
November 13, 2009, 09:17 PM
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.

Redneck with a 40
November 13, 2009, 11:53 PM
+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.

JDGray
November 13, 2009, 11:54 PM
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.

Range Hound
November 15, 2009, 09:12 PM
Kernel, does your modified Powly allow you to change the barrell length to 18"?

Kernel
November 16, 2009, 01:48 AM
Range Hound,

Not a problem. Should of caught that first time around.
http://images5a.snapfish.com/232323232%7Ffp63238%3Enu%3D3645%3E%3A57%3E257%3EWSNRCG%3D32543249%3B6348nu0mrj
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.

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.
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.

Range Hound
November 16, 2009, 08:50 PM
Kernel,
Where did you find the modified Powley Computer, this looks like a great program. Thanks for the help.

Kernel
November 16, 2009, 09:58 PM
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

Bear2000
November 16, 2009, 10:08 PM
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.

Canuck-IL
November 16, 2009, 11:01 PM
I think it's interesting that my mathematical model is in agreement with Canuck and this guy John Holliger (whoever he is)
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

Runningman
February 8, 2010, 10:09 PM
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.

Fatelvis
February 9, 2010, 07:14 AM
Reloader 15 24.0 grns, Rem 7 1/2 primer

ILikeLead
February 9, 2010, 04:56 PM
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

Rokman
February 9, 2010, 08:10 PM
I have had good results with RL15, Varget, and Tac.

mm1ut1
February 11, 2010, 09:30 AM
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.
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.

dboyles
February 11, 2010, 09:15 PM
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.

dc.fireman
February 12, 2010, 05:56 PM
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

win308
February 12, 2010, 11:15 PM
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.

HKGuns
February 13, 2010, 04:49 PM
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.

Pumpkinheaver
February 15, 2010, 12:47 AM
I've had great luck with Accurate 2015 with the 69gr Matchking.

Axten
November 5, 2010, 07:20 PM
I load 25.8gr varget @ 2.305 o.a.l and get same hole groups all day @ 100/200 yards..
I have shot well over 2,000 of these loads and find it extreamly accurate.
Please note that I have a long OAL due to head spacing.
The only down side to this load is it turns my bolt gun into a single shot as the rounds are to long for the mag.

I also found that w748 @ 26.5grs. Was another same hole load for me. Same OAL.

It took me around 40-50 different loads to find same hole groups. I would recommend starting at the mn. load according to whom evers reloading charts you are using and working your way up in .5gr incraments. When you find a groups that are "close" then go back and reload in .2gr incraments.

Also note that most guns will have a lower end accuracy load as well as an upper end accuracy load. So just because you find a load on the bottom end of the chart doesn't mean you have to stay there if you are looking for speed. Write that load down and then keep working your way up.

GL. with your reloading and shoot straight and smart.
What ever you do, unless you have the equiptment to do it, do not exceed max. loads. They are marked for a reason. I've seem to many ppl have firing pins blown back at them to advise any other way.

bob hardy
January 4, 2011, 10:54 AM
Axten, what kind of rifle are you using to get such groups. I have a Savage 12, 26" HV brl.
Bob

Robert
January 4, 2011, 11:07 AM
Bob,
Seeing how his one and only post was made in two months ago Axten may not be around anymore. You might try sending him a pm and see where that gets you.

ba9780m1
April 16, 2012, 07:36 PM
I Have beenreloading rifle for about 2 years now using a accruate load out of my Savage Model 12 Targe Riflre. Load is as follows:

CCI 400 Primers
69 Gr. SMK BTHP
Rem Case AOL of case 1.755
23.9 Gr. Vartget
COAL 2.355 Yes I know its long but I used a Hornady AOL Headspace gage
and I am resting the cartridge .25 off the Lands
Slight factory Die C
the above gives me a 2 inch group 300 yards 2 inches.
Now the problem im starting to feel small loose spotes in my barrel when i run a patch in the barrel i have cronie the loads and im in spec have shot about 1000 round through the barrel but i dont want to burn up the barrel
anybody have any thoughts? Help:banghead::banghead:

Canuck-IL
April 16, 2012, 11:28 PM
... the problem im starting to feel small loose spotes in my barrel when i run a patch in the barrel...

With so few rounds and a sensible load, I'd suspect copper/fouling builld-up more than the barrel starting to go - especially given the history of some pretty rough barrels coming from Savage.

I'd use Sweet's or something similar to be sure the copper's out and then JB paste the barrel, especially the first several inches.
/Bryan

ba9780m1
April 18, 2012, 04:52 PM
I Have been reloading rifle .223 for about 2 years now using a accruate load for of my Savage Model 12 Targe Riflre. Load is as follows:

CCI 400 Primers
69 Gr. SMK BTHP
Rem Case AOL of case 1.755
23.9 Gr. Vartget
COAL 2.355 Yes I know its long but I used a Hornady AOL Headspace gage
and I am resting the cartridge .025 off the Lands
Slight factory Die C
the above gives me a 2 inch group 300 yards 2 inches.
Now the problem im starting to feel small loose spotes in my barrel when i run a patch in the barrel. i have cronie the loads and im in spec have shot about 1000 round through the barrel but i dont want to burn up the barrel
anybody have any thoughts? Help:banghead::banghead:

ba9780m1
April 18, 2012, 04:57 PM
OOPs i wanted to refrase my problem with my formula you see im .025 off the lands not
.25... Thank you for the last post but i have used Hopps bore cleaner and Copper solvent I run a Bronze brush up the chamber 100 time then with patch till clean repeat 3 time afer shooting with about 1 day soak time inbetween..

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