I think it's very interesting that so many independent handloaders find the same accuracy node at
47.5 grains. I almost never get good results on recommended load data.

It works really well in my 7-08 also. 20 Inch barrel and was able to push the 140's to around 2920 with Lapua brass. Unfortunaltely the node was around 2850. But still way faster than Varget and 4064. 1/2 MOA on the first couple 5 shot groups with an SD of 6.8

This powder is back in stock also!! Good to hear it's working well for everyone!! Keep the load data coming.

I am using it in my personal 308 Win, 224 Valkrie, and some 223 hunting ammo. It's doing very well with top velocities.

I will be in Fort Worth around the 24th. I plan on stopping by and grabbing another 10lbs or so.

good to see some newer members chiming in with posts!!

About time I filled my 7-08 brass again. Think I will try the 130 gr. Speer Hotcors.

For AR-10, are you putting mild crimp on loads?

Has anyone worked up any loads with the 223/5.56?

I haven’t loaded 223 yet but it works well in 22-250 with 55 grain pills. Not the same, I know but, seems to be a fast enough powder to work in 223 with the 50-55 grainers.

Yes, I have some good data. I’ll look tomorrow for you, but I think I was running 25.5 grains with a 75 grain Hornady bthp. I’ll confirm it for you.

20 inch Barrel AR style.

223 - 55gr
Load Average Std Dev
24.4 2054 88
24.8 2541 27
25.2 2574 17
25.6 2642 37
26.0 2720 19
26.4 2816 26
26.8 2914 61
27.2 2939 39

223 - 68gr
Load Average Std Dev
23.0 2357 40
23.3 2420 54
23.6 2502 40
23.9 2555 11
24.2 2589 30
24.5 2663 11

I loaded some 62 gr. bullets up with 24.0 grains of 763 in my 22 inch bolt gun. Did not chrony but got a tackdriver of a load. How did you decide on a max load?

Did not decided yet!
I can push more than that actually however due to some lack of time i wasn't able to do more.

Hoping to have some spare time this winter to test more.

In regard to the loads, with the 55gr the best group that I got was with 26gr. With 68gr none of the groups were good, however with 24.5gr there was some improvement (like 2MOA...)

Currently I am trying to find a good load using 80 gr. ELDM in a 22 ARC. Good but not splendid accuracy at 27.5 grains. I have one with 62 gr. Midsouth Black Tips but though I am getting no pressure signs accuracy goes to hell with one more grain over 28.5. Might be spinning them too fast. This data is from a gas gun and I am not confident enough to recommend it. Work up yourself.

Guys, would a 45, 50 or 55gr .223 projectile be too light for this powder?

I ran some 223 Remington loads over the chronograph and were surprised at the results. I loaded the Sierra 69gn HPBT @ 2.26 OAL. I used both Hodgdon CFE223 load data along with Alliant 2000-MR load data to pick a starting load and a max load. Alliant listed 26.6 (FPS-3070)suggested with the Sierra projectile and Hodgdon CFE223 listed 23.5gn (FPS-2788) start and 25.8gn Max (FPS-3029).

The rifle used was a old AR build with a 20" Colt pencil barrel with a chrome bore. I don't remember the twist of the barrel but it should be 1/12 but could be 1/9. The handguards require some work to remove to make sure but I am not up to it today! I used this barrel as it is easier to get velocity readings then it is with my AR carbines with a 16" barrel as the handguards get in the way. Chrono was a Magnetospeed. I weigh each powder charge on a electronic scale to insure consistency. I loaded up 3 rounds in each chosen powder weight that I was going to test. I started off at 25.5 and went up to 26.5. NOTE: I had previously loaded some 55gn fmj with this same powder, so I had an idea/experience behind my choice of starting loads with the 69gn.

RESULTS:

Grains/AVG/SD/ES
25.5 2818/7/14 did not measure as it was to the left of the target

25.8 2885/24/44 outside to outside edge, 1.25

26.0 2900/8/17 Most accurate, outside edge to outside edge, .640

26.2 2908/27/50 1.375

26.5 2939/16/33 1.375

It was tough conditions at the range today with a little front blowing in with some light rain and a lot of wind. I would not blindly load up using this data I posted, all guns are different and all loading equipment is different so give yourself a safety margin and start low and work your way up with YOUR loads, YOUR equipment and YOUR rifle! I could tell and expected to see pressure increase as the powder weight increased and it did. But it was not enough to concern me in this rifle. I will try out the 26.0 load in my 16" rifles as time allows. Oh and primers used were the Winchester SR. So in my 223 rifle, I would say the SMP-763 powder is really close but just a shy slower then Alliant 2000-MR. Thanks again to Chad for bringing in and sharing his powder find!!

Thanks for the info

Finally got around to loading up some of this powder in few of my AR's (.223/5.56), and figured somebody could use the data. I was shooting the RMR 75 gr 3GH.

Finally got to the range with my 18" RR arms AR to try out some 55gn loads. The following data is using 55gn FMJ-BT projectiles. Random brass that was all trimmed to length and WSR primers.
Powder of course was the SMP-763 reclaimed.

26.5 Avg. 2889 .535
SD. 11
ES. 22

26.8 Avg. 2885 .845
SD. 14
ES. 29

27.0 Avg. 2911 .330
SD. 16
ES. 24

27.2 Avg. 2940 .850
SD. 8
ES. 14

27.3 Avg. 2935 .635
SD. 27
ES. 53

NOTE: I did not observe any pressure signs with my loads in my rifle but it would be wise to work up your loads for your rifle as they all are different. The most accurate load I fired was the 27.0gn which was basically 2 holes together followed by the 27.2 and 27.3 loads. Will try and get back with a more extensive test in the 27.0 and up loadings. I only brought those 5 loads this time. Happy shooting and be safe!