Supreme 780 and 300 win Mag

[Alaska]

Winchester Supreme 780 and the 200gr Nosler AB anyone use this combo in the 300 Win Mag?

 

[SJB358]

Haven't used it, but it looks like a good one looking at Hodgdon's site. Shows decent speed. Haven't heard of alot of W780 shooters, but I hear it is what Winchester loads in their Supreme line for a bunch of rounds. Scotty

 

[Alaska]

I loaded some 165gr Fail Safe and 780 Supreme with WW brass and WLRM primers very good load.
I just loaded it to Hogd. Web site max load. Shoots real good in Browning FN 300 Win.

 

[FOTIS]

Cartridge : .300 Win. Mag.(R)
Bullet : .308, 200, Nosler AccuBond 54618
Useable Case Capaci: 73.784 grain H2O = 4.791 cm³
Cartridge O.A.L. L6: 3.340 inch = 84.84 mm
Barrel Length : 24.0 inch = 609.6 mm
Powder : Winchester Supreme 780

Predicted data by increasing and decreasing the given charge,
incremented in steps of 1.0% 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

-10.0 88 63.00 2510 2798 43031 10087 96.5 1.429
-09.0 89 63.70 2539 2862 44537 10199 96.9 1.406
-08.0 90 64.40 2567 2927 46091 10306 97.3 1.384
-07.0 91 65.10 2596 2993 47697 10410 97.6 1.362
-06.0 92 65.80 2625 3059 49361 10510 98.0 1.340
-05.0 93 66.50 2653 3127 51088 10605 98.3 1.319
-04.0 94 67.20 2682 3195 52878 10696 98.6 1.299
-03.0 95 67.90 2711 3263 54737 10782 98.8 1.278 ! Near Maximum !
-02.0 96 68.60 2739 3333 56666 10864 99.0 1.258 ! Near Maximum !
-01.0 97 69.30 2768 3403 58669 10941 99.3 1.239 ! Near Maximum !
+00.0 98 70.00 2797 3473 60750 11013 99.4 1.219 ! Near Maximum !
+01.0 99 70.70 2825 3545 62911 11080 99.6 1.201 !DANGEROUS LOAD-DO NOT USE!
+02.0 100 71.40 2854 3617 65159 11142 99.7 1.182 !DANGEROUS LOAD-DO NOT USE!
+03.0 101 72.10 2882 3689 67495 11198 99.8 1.163 !DANGEROUS LOAD-DO NOT USE!
+04.0 102 72.80 2911 3763 69926 11249 99.9 1.146 !DANGEROUS LOAD-DO NOT USE!
+05.0 102 73.50 2939 3836 72456 11295 100.0 1.128 !DANGEROUS LOAD-DO NOT USE!

Results caused by ± 5% powder lot-to-lot burning rate variation using nominal charge
Data for burning rate increased by 5% relative to nominal value:
+Ba 98 70.00 2861 3636 66778 10854 100.0 1.172 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 5% relative to nominal value:
-Ba 98 70.00 2719 3284 54809 11020 97.7 1.273 ! Near Maximum !

 

[Mighty Peace]

I have some 780 powder and was thinking of trying it with 180gr AB's in my 300WM. Right now super happy with performance of RL-22 powder. I had seen that WS used the 780 for their 300 ammo.

Hey FOTIS, can yourun those same numbers for a 180gr AccuBond?
Thanks. :mrgreen: