please review my latest load....

[SSN Vet]

I check my manuals and powder mfg. web. sites.....

but I also like to vet "new to me" loads here for comment, advise and critique.

loading for 16" AR

69 gr. Sierra BTHP Matchking
WSRP
Win brass (twice fired)
23.0 gr. H335 (purchased in the last 3 mos)
(loaded a box for testing, load recommended to me by fellow member at the gun club where I shoot)

I also loaded up 5 rounds with 23.4 gr. of the same H335, which is pushing close to Sierra's published max. of 23.8 gr.

I've read that the newer lots of H335 are faster burning, so I wanted to see if others thought 23 was a prudent starting point, and whether the 23.4 might be dangersous.

thanks in advance....

 

[Afy]

Cartridge : .223 Rem. (SAAMI)
Bullet : .224, 65, Sierra SPBT 1395
Useable Case Capaci: 25.566 grain H2O = 1.660 cm³
Cartridge O.A.L. L6: 2.260 inch = 57.40 mm
Barrel Length : 16.0 inch = 406.4 mm
Powder : Hodgdon H335

Predicted data by increasing and decreasing the given charge,
incremented in steps of 2.0% of nominal charge.
CAUTION: Figures exceed maximum and minimum recommended loads !

Step Fill. Charge Vel. Energy Pmax Pmuz Prop.Burnt B_Time
% % Grains fps ft.lbs psi psi % ms

-20.0 73 18.72 2151 668 26493 8119 84.4 1.132
-18.0 75 19.19 2205 702 28204 8411 85.8 1.105
-16.0 76 19.66 2259 737 30027 8699 87.2 1.077
-14.0 78 20.12 2314 773 31967 8982 88.5 1.051
-12.0 80 20.59 2369 810 34040 9259 89.8 1.025
-10.0 82 21.06 2424 848 36249 9529 91.0 0.999
-08.0 84 21.53 2479 887 38608 9790 92.1 0.972
-06.0 86 22.00 2534 927 41127 10043 93.2 0.944
-04.0 87 22.46 2590 968 43818 10287 94.2 0.916
-02.0 89 22.93 2645 1010 46696 10519 95.1 0.890
+00.0 91 23.40 2700 1053 49767 10739 96.0 0.864 ! Near Maximum !
+02.0 93 23.87 2756 1096 53024 10946 96.7 0.839 ! Near Maximum !
+04.0 95 24.34 2811 1141 56499 11140 97.4 0.816 !DANGEROUS LOAD-DO NOT USE!
+06.0 96 24.80 2867 1186 60215 11319 98.1 0.792 !DANGEROUS LOAD-DO NOT USE!
+08.0 98 25.27 2922 1233 64193 11482 98.6 0.770 !DANGEROUS LOAD-DO NOT USE!
+10.0 100 25.74 2978 1280 68456 11628 99.0 0.749 !DANGEROUS LOAD-DO NOT USE!

Results caused by ± 10% powder lot-to-lot burning rate variation using nominal charge
Data for burning rate increased by 10% relative to nominal value:
+Ba 91 23.40 2843 1167 59546 10819 99.6 0.799 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 91 23.40 2518 915 40487 10139 88.5 0.948

 

[SSN Vet]

Bump....

I was kind of under the impression that this was an "old faithful" load....

maybe because I respect the guy who recommended it....

the absence of comments is making me think twice.

Did a search and only found it recommended one other place.

Any other thoughts? comments?

 

[Walkalong]

Looks good to me. Start at 23.0 and work up. You will find a sweet spot along the way. If your rifle won't shoot something between 23 & 24 Grs well, it's not the load.

 

[BigBlack]

Although different rifle and projectile here are some of my results using this powder.

For Hornady 52gr Match bullets I got my best group so far with

24.5gr H335 and BR-4 primers. I am shooting a remington 700 with a comparator OAL .020 off the lands at 1.870". My average velocity was 3172. 24.5 was were my groups grouped the smallest. My next charge of 25gr they opened back up and continued opening up until I hit the published max load.

 

[Sylvan-Forge]

SSN Vet,

Data a bit old ..

From Lyman 48th Edition:
1st Printing : DEC2002
2nd Printing : MAY2004

.223 Remington Brass
TTL 1.750"
2.260" OAL
Remington 7 1/2 primer
Sierra HPBT #1380 69 gr.

Universal Receiver 24" 1-12 twist
Colt AR-15 20" 1-7 twist

H335 Starting 22.9 gr. 2593 fps 32.7k CUP
H335 Max 25.5 gr. 2994 fps 51.4k CUP

.

 

[Sunray]

Hodgdon gives 22.0 as the 69 grain bullet starting load for H335. Going up to 24.0. Always work up the load from the 'Starting' load.
"...an "old faithful" load..." Maybe in his rifle, but all rifles will shoot all ammo and loads differently. Even two consecutively serial numbered identical rifles. You have to work up the load for your rifle.

 

[SSN Vet]

not to shabby.....

iron sights at 50 yds.

took a 1/4" of my previous best group using bulk Win 55 gr. FMFBT,

I think I'm liking these Match Kings!

 

[scrat]

not too shabby !!!!



thats very very good


excellent job SSNVET