Ok all I finally picked up a friends 300 wsm to see if I could get it to shoot accurately, I'm going to clean the guts out of it first off. It looks filthy, so cleaning will be first, with the above bullets which of the following powders that I have do you think I should acheive some decent accuracy. I have R17, R19, 4831sc, h414, Magpro, Hunter, and IMR 4350. Im thinking R19 to start. Whats your thoughts?
300 WSM and 180 BT and PTs
- Thread starter rmarshall
- Start date
DrMike
Ballistician
- Nov 8, 2006
- 37,312
- 5,978
I've had good success with each of those powders at various times in those bullet weights and in those particular bullets. I would suggest that RL19 will work well, but recent work with RL17 would indicate that it may be as good, if not better. MagPro and H414 have both yielded some excellent ballistics and velocities in the past.
- Thread starter
- #3
DrMike
Ballistician
- Nov 8, 2006
- 37,312
- 5,978
Cartridge : .300 WSM (CIP)
Bullet : .308, 180, Nosler PART PP 25396
Useable Case Capaci: 73.588 grain H2O = 4.778 cm³
Cartridge O.A.L. L6: 2.860 inch = 72.64 mm
Barrel Length : 24.0 inch = 609.6 mm
Powder : Alliant Reloder-17
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 75 53.20 2478 2454 32688 9481 98.2 1.526
-18.0 77 54.53 2536 2570 34876 9696 98.9 1.488
-16.0 79 55.86 2593 2688 37206 9890 99.3 1.450
-14.0 80 57.19 2650 2808 39691 10065 99.7 1.406
-12.0 82 58.52 2707 2929 42344 10217 99.9 1.364
-10.0 84 59.85 2763 3051 45173 10347 100.0 1.324
-08.0 86 61.18 2818 3174 48196 10462 100.0 1.286
-06.0 88 62.51 2873 3299 51422 10575 100.0 1.249
-04.0 90 63.84 2927 3423 54876 10685 100.0 1.213 ! Near Maximum !
-02.0 92 65.17 2980 3549 58569 10792 100.0 1.179 ! Near Maximum !
+00.0 93 66.50 3033 3676 62519 10896 100.0 1.146 ! Near Maximum !
+02.0 95 67.83 3085 3805 66716 10997 100.0 1.114 !DANGEROUS LOAD-DO NOT USE!
+04.0 97 69.16 3137 3934 71186 11095 100.0 1.083 !DANGEROUS LOAD-DO NOT USE!
+06.0 99 70.49 3189 4065 75956 11189 100.0 1.054 !DANGEROUS LOAD-DO NOT USE!
+08.0 101 71.82 3240 4197 81052 11280 100.0 1.026 !DANGEROUS LOAD-DO NOT USE!
+10.0 103 73.15 3291 4330 86502 11367 100.0 0.998 !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 93 66.50 3129 3913 75564 10529 100.0 1.066 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 93 66.50 2885 3327 50236 11382 99.7 1.253
Bullet : .308, 180, Nosler PART PP 25396
Useable Case Capaci: 73.588 grain H2O = 4.778 cm³
Cartridge O.A.L. L6: 2.860 inch = 72.64 mm
Barrel Length : 24.0 inch = 609.6 mm
Powder : Alliant Reloder-17
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 75 53.20 2478 2454 32688 9481 98.2 1.526
-18.0 77 54.53 2536 2570 34876 9696 98.9 1.488
-16.0 79 55.86 2593 2688 37206 9890 99.3 1.450
-14.0 80 57.19 2650 2808 39691 10065 99.7 1.406
-12.0 82 58.52 2707 2929 42344 10217 99.9 1.364
-10.0 84 59.85 2763 3051 45173 10347 100.0 1.324
-08.0 86 61.18 2818 3174 48196 10462 100.0 1.286
-06.0 88 62.51 2873 3299 51422 10575 100.0 1.249
-04.0 90 63.84 2927 3423 54876 10685 100.0 1.213 ! Near Maximum !
-02.0 92 65.17 2980 3549 58569 10792 100.0 1.179 ! Near Maximum !
+00.0 93 66.50 3033 3676 62519 10896 100.0 1.146 ! Near Maximum !
+02.0 95 67.83 3085 3805 66716 10997 100.0 1.114 !DANGEROUS LOAD-DO NOT USE!
+04.0 97 69.16 3137 3934 71186 11095 100.0 1.083 !DANGEROUS LOAD-DO NOT USE!
+06.0 99 70.49 3189 4065 75956 11189 100.0 1.054 !DANGEROUS LOAD-DO NOT USE!
+08.0 101 71.82 3240 4197 81052 11280 100.0 1.026 !DANGEROUS LOAD-DO NOT USE!
+10.0 103 73.15 3291 4330 86502 11367 100.0 0.998 !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 93 66.50 3129 3913 75564 10529 100.0 1.066 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 93 66.50 2885 3327 50236 11382 99.7 1.253
Guy Miner
Master Loader
- Apr 6, 2006
- 17,746
- 5,817
I know it's not on your list, but I saw my best results from the .300 WSM with H4350. Hunter wasn't bad either, nor RL-22.
- Thread starter
- #6
Plagioclase
Beginner
- Mar 5, 2014
- 6
- 0
My 300 WSM's have liked H4350 and H4831 about equal under both 180 PT and AB. Re 17 wasn't bad but 4350/4831 worked significantly better. Plus the H's are temp insensitive.
