300 Winchester Magnum - 180 grain bullets - RL25

[300winnie]

Anyone using this combination? If so, what were your results?

 

[338 Ultra]

Anyone using this combination? If so, what were your results?

Never tried it, powder is a bit slow burning for a 180 but 74-75 grains of RL-22 shoots the lights out in a 300 mag mine likes 74 grains. So hoping you have some RL-22 if you don't H-4831 is a close second.

 

[FOTIS]

Start at 75 grains. You should max out at 78-79 gr. 3100 fps is easy in a 24" tube.

 

[338 Ultra]

Start at 75 grains. You should max out at 78-79 gr. 3100 fps is easy in a 24" tube.

I stand corrected thanks Fotis

 

[SJB358]

Anyone using this combination? If so, what were your results?

I tried it with some 200's once upon a time and it did excellent, can't see why it wouldn't work decent with 180's as well.

Cartridge : .300 Win. Mag.(W)
Bullet : .308, 180, Nosler AccuBond 54825
Useable Case Capaci: 81.634 grain H2O = 5.300 cm³
Cartridge O.A.L. L6: 3.340 inch = 84.84 mm
Barrel Length : 24.0 inch = 609.6 mm
Powder : Alliant Reloder-25

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 97 72.90 2811 3158 44206 12196 99.4 1.340
-09.0 98 73.71 2843 3231 45779 12288 99.6 1.318
-08.0 100 74.52 2876 3305 47412 12371 99.8 1.297
-07.0 101 75.33 2908 3380 49112 12446 99.9 1.275
-06.0 102 76.14 2940 3455 50876 12512 100.0 1.255
-05.0 103 76.95 2972 3531 52709 12569 100.0 1.234
-04.0 104 77.76 3004 3606 54615 12621 100.0 1.214
-03.0 105 78.57 3035 3683 56599 12671 100.0 1.195 ! Near Maximum !
-02.0 106 79.38 3067 3759 58660 12721 100.0 1.175 ! Near Maximum !
-01.0 107 80.19 3098 3837 60807 12770 100.0 1.157 ! Near Maximum !
+00.0 108 81.00 3129 3914 63041 12817 100.0 1.138 ! Near Maximum !
+01.0 109 81.81 3160 3992 65367 12864 100.0 1.120 !DANGEROUS LOAD-DO NOT USE!
+02.0 110 82.62 3191 4071 67792 12909 100.0 1.102 !DANGEROUS LOAD-DO NOT USE!
+03.0 111 83.43 3222 4150 70318 12953 100.0 1.084 !DANGEROUS LOAD-DO NOT USE!
+04.0 113 84.24 3253 4229 72953 12996 100.0 1.067 !DANGEROUS LOAD-DO NOT USE!
+05.0 114 85.05 3283 4309 75700 13037 100.0 1.050 !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 108 81.00 3254 4231 78057 12317 100.0 1.048 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 108 81.00 2937 3449 50207 13253 98.4 1.256