Anyone have a decent load for an AR using 748?

[sammy]

I have 8lbs of 748 that I got a great deal on several years back.

Working up 308 loads I had no luck at all finding anything that was accurate. I would like to use it up but haven't had any luck with 69-77 grain bullets.

Anyone have any luck with this powder and a .223 bullet?

[bohoki]

i use it exclusively when i can find it but i just use 55 fmj when i am stingy i do 23 grains cause it comes out to an even 300 rounds a pound and works fine in a mini 14

25 grains if i want to shoot the gong at 300 yards

[Sailormilan2]

748 is pretty much the same as H335. Winchester shows a max charge of 26.2 gr for a 55 gr FMJ.

[Divernhunter]

I have used it for years for my 223(55gr bullets) and 308 (125/130/150gr bullets). Excellent powder.
55gr bullet and 27grs of 748.
150gr Nosler PAR 49grs 748
130gr TTSX 54grs 748
150gr TTSX 48grs 748
Seat the Barnes deep so the top relief groove is just showing.
I use mag primers in all loads

AS far as being close to H-335. 748 is #137 and H-335 is #113 on the burn rate.
748 is closer to BL-C(2) which is #138
OR RL15(#132)/Varget(#135)/IMR4320(#136)/CFE223(#140)

[smoothy8500]

Working up 308 loads I had no luck at all finding anything that was accurate...haven't had any luck with 69-77 grain bullets.

Kind of odd that you haven't had luck with anything using 748 . Usually it works pretty well for any of those.

[Sailormilan2]

AS far as being close to H-335. 748 is #137 and H-335 is #113 on the burn rate.
748 is closer to BL-C(2) which is #138
OR RL15(#132)/Varget(#135)/IMR4320(#136)/CFE223(#140)

My bad. You are correct. The load data is correct per Winchester.

[ar15barrels]

I have 8lbs of 748 that I got a great deal on several years back.
I would like to use it up but haven't had any luck with 69-77 grain bullets.

This is NOT load data, but here is what Quickload has to say:

Cartridge          : .223 Rem. (SAAMI)
Bullet             : .224, 69, Sierra HPBT MatchK 1380 G7 Litz
Useable Case Capaci: 25.121 grain H2O = 1.631 cm³
Cartridge O.A.L. L6: 2.260 inch = 57.40 mm
Barrel Length      : 20.0 inch = 508.0 mm
Powder             : Winchester 748

Predicted data by increasing and decreasing the given charge,
incremented in steps of 0.403% 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

-04.0   96    23.80   2815    1214   50123   8636     96.8    0.998  ! Near Maximum !
-03.6   96    23.90   2827    1225   50822   8667     96.9    0.992  ! Near Maximum !
-03.2   96    24.00   2840    1235   51530   8697     97.1    0.986  ! Near Maximum !
-02.8   97    24.10   2852    1246   52252   8727     97.2    0.980  ! Near Maximum !
-02.4   97    24.20   2864    1256   52983   8756     97.4    0.974  ! Near Maximum !
-02.0   98    24.30   2876    1267   53723   8785     97.5    0.968  ! Near Maximum !
-01.6   98    24.40   2888    1278   54481   8813     97.7    0.962  !DANGEROUS LOAD-DO NOT USE!
-01.2   98    24.50   2900    1288   55248   8840     97.8    0.956  !DANGEROUS LOAD-DO NOT USE!
-00.8   99    24.60   2912    1299   56025   8867     97.9    0.950  !DANGEROUS LOAD-DO NOT USE!
-00.4   99    24.70   2924    1310   56817   8893     98.0    0.945  !DANGEROUS LOAD-DO NOT USE!
+00.0  100    24.80   2936    1321   57621   8919     98.2    0.939  !DANGEROUS LOAD-DO NOT USE!
+00.4  100    24.90   2948    1331   58436   8944     98.3    0.933  !DANGEROUS LOAD-DO NOT USE!
+00.8  100    25.00   2960    1342   59265   8968     98.4    0.928  !DANGEROUS LOAD-DO NOT USE!
+01.2  101    25.10   2972    1353   60109   8992     98.5    0.922  !DANGEROUS LOAD-DO NOT USE!
+01.6  101    25.20   2984    1364   60964   9015     98.6    0.916  !DANGEROUS LOAD-DO NOT USE!
+02.0  102    25.30   2996    1375   61833   9037     98.7    0.911  !DANGEROUS LOAD-DO NOT USE!

Results caused by ± 3% powder lot-to-lot burning rate variation using nominal charge
Data for burning rate increased by 3% relative to nominal value:
+Ba    100    24.80   2983    1364   61227   8898     99.2    0.916  !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 3% relative to nominal value:
-Ba    100    24.80   2884    1274   54168   8894     96.8    0.964  ! Near Maximum !

Cartridge          : .223 Rem. (SAAMI)
Bullet             : .224, 77, Sierra C-HPBT MatchK 9377GT
Useable Case Capaci: 24.054 grain H2O = 1.562 cm³
Cartridge O.A.L. L6: 2.260 inch = 57.40 mm
Barrel Length      : 20.0 inch = 508.0 mm
Powder             : Winchester 748

Predicted data by increasing and decreasing the given charge,
incremented in steps of 0.427% 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

-04.3   94    22.40   2654    1205   49420   8303     97.5    1.054  ! Near Maximum !
-03.8   94    22.50   2666    1215   50140   8333     97.7    1.048  ! Near Maximum !
-03.4   95    22.60   2678    1226   50867   8362     97.8    1.041  ! Near Maximum !
-03.0   95    22.70   2689    1237   51606   8391     97.9    1.035  ! Near Maximum !
-02.6   96    22.80   2701    1248   52357   8419     98.1    1.028  ! Near Maximum !
-02.1   96    22.90   2713    1259   53119   8447     98.2    1.022  ! Near Maximum !
-01.7   96    23.00   2725    1269   53893   8474     98.3    1.015  ! Near Maximum !
-01.3   97    23.10   2736    1280   54680   8500     98.4    1.009  !DANGEROUS LOAD-DO NOT USE!
-00.9   97    23.20   2748    1291   55479   8526     98.5    1.002  !DANGEROUS LOAD-DO NOT USE!
-00.4   98    23.30   2760    1302   56292   8551     98.7    0.996  !DANGEROUS LOAD-DO NOT USE!
+00.0   98    23.40   2772    1314   57118   8575     98.8    0.990  !DANGEROUS LOAD-DO NOT USE!
+00.4   98    23.50   2783    1325   57956   8599     98.9    0.984  !DANGEROUS LOAD-DO NOT USE!
+00.9   99    23.60   2795    1336   58810   8622     99.0    0.978  !DANGEROUS LOAD-DO NOT USE!
+01.3   99    23.70   2807    1347   59672   8644     99.1    0.971  !DANGEROUS LOAD-DO NOT USE!
+01.7  100    23.80   2818    1358   60557   8666     99.1    0.965  !DANGEROUS LOAD-DO NOT USE!
+02.1  100    23.90   2830    1369   61453   8687     99.2    0.959  !DANGEROUS LOAD-DO NOT USE!

Results caused by ± 3% powder lot-to-lot burning rate variation using nominal charge
Data for burning rate increased by 3% relative to nominal value:
+Ba     98    23.40   2814    1354   60702   8531     99.6    0.966  !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 3% relative to nominal value:
-Ba     98    23.40   2725    1269   53689   8576     97.5    1.015  ! Near Maximum !

If you want actual tested load data, look in reloading manuals.

[dmy]

Good powder, but a little snappy

I've had good luck using 23 - 26 grs of W748 with 55 - 62 gr projectiles. It meters well, especially compared to my my usual IMR 4064. It is a little snappier than 4064, but not quite as snappy as CFE 223, in my experience.

[stevec223]

[JackEllis]

What I consider good enough (~1-1.25 inch groups) might not be good enough for the OP but that's what I get with Federal Fusion pulls and 25.5 grains of W748 in a Tikka T3 lite.

I was able to get good deals on both W748 and IMR 4198. Both work about equally well for me.

YMMV

[SharedShots]

I have 8lbs of 748 that I got a great deal on several years back.

Working up 308 loads I had no luck at all finding anything that was accurate. I would like to use it up but haven't had any luck with 69-77 grain bullets.

Anyone have any luck with this powder and a .223 bullet?

It might help if everyone knew what barrel length and twist rate your rifle has. With the 223 and 77s in a 1 in 9 or slower twist it's not ideal no matter what powder you're using. Possible doesn't mean best or even good.

Have you tried lighter bullets?

[anyracoon]

27gr with a 55 gr FMJBT is what I use in my AR's.

[yzErnie]

I have used 748 for decades as my go to for the .223/5.56. I have found it to be accurate out of my bolt and my coyote AR with a 20" barrel. I use the lighter bullets,45-52gr for the coyote loads but I also use 748 for the heavier bullets as well.

Been doing some load development with the all copper bullets with 748, TAC, H335 and Varget. I haven't shot too many of the loads yet because of my shoulder but it is getting better and I'll be heading to the range in the next few weeks to get the rest of the results of the loads. So far the testing has shown TAC to be a good performer.

[Divernhunter]

I get excellent accuracy using 748 with 40-55gr bullets in my 223 rifles and pistol. Alos usually the most FPS. I do not load heavier than 55gr 22cal bullets.

I also get excellent accuracy in my 308 with 125-150gr lead core bullets and 130 or 150gr TTSX bullets.