Load Specifications
Bullet Manufacturer:MRR
Bullet Weight:152 gr
Bullet Diameter:0.308"
Bullet Length:<<locked>>
Caliber:.300 WSM load data
Case Length (l3):2.09"
Cartridge Length (C.O.L.):<<locked>>
Case Capacity:81.3 Grains of Water
Primer Size:Large Rifle Magnum (LRM)
Barrel Length:24"
Max. allowed Pressure:63,817 psi
Recommended Twist Rate:1:13.5
Load data in caliber .300 WSM with .308 | 152gr | MRR Green Hunting bullet and 103 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-17, ReloadSwiss RS 60 and Alliant Power Pro 2000-MR.
Important Notice: DO NOT go below Minimum Charge or above Maximum Charge. Since we have no control over the equipment and components used, any responsibility and liability for the results achieved is rejected.
Only powders/loads that match the current filter criteria are displayed: max pressure of a load ≤ 90% of max. standardized pressure, fill rate ≥ 80% and propellant combustion ≥ 95%. Use the sliders above the tables to adjust these thresholds.
Charge: Powder weight in grains. Start with the minimum load and work up carefully.
FR (Fill Rate): Case fill as a percentage. Values above 100% mean compressed loads.
MaxP / %: Maximum chamber pressure in bar and as a percentage of the standardized maximum for this caliber.
V(0): Muzzle velocity in feet per second (fps) at the standardized barrel length.
z (Powder Burn): Estimated propellant combustion percentage at bullet exit.
A valid access license is required to use the Personalized Load Calculator.
You can find more information in our FAQ: How can I use the Personalized Load Calculator?
Max Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 86% | 57,232 psi | 90% | 2946 fps | 100% |
| Accurate 2460 | <<locked>> | 82% | 55,738 psi | 87% | 2972 fps | 100% |
| Accurate 2495 | <<locked>> | 90% | 55,579 psi | 87% | 2963 fps | 100% |
| Accurate 2520 | <<locked>> | 86% | 56,449 psi | 88% | 3028 fps | 100% |
| Accurate 2520 | <<locked>> | 86% | 56,449 psi | 88% | 3028 fps | 100% |
| Accurate 2700 | <<locked>> | 94% | 56,666 psi | 89% | 2969 fps | 96.8% |
| Accurate 4064 | <<locked>> | 92% | 55,593 psi | 87% | 3012 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 55,985 psi | 88% | 3100 fps | 99.5% |
| ADI AR 2206H | <<locked>> | 88% | 56,695 psi | 89% | 3054 fps | 99.9% |
| ADI AR 2208 | <<locked>> | 94% | 57,682 psi | 90% | 3048 fps | 99.8% |
| ADI Benchmark 8208 | <<locked>> | 86% | 55,579 psi | 87% | 3002 fps | 100% |
| Alliant AR-Comp | <<locked>> | 86% | 56,289 psi | 88% | 2976 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 82% | 57,363 psi | 90% | 3117 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 90% | 56,579 psi | 89% | 3179 fps | 99.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 92% | 53,983 psi | 85% | 3015 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 82% | 56,681 psi | 89% | 2949 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 90% | 54,679 psi | 86% | 3041 fps | 99.7% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 53,621 psi | 84% | 3100 fps | 99.5% |
| Alliant Reloder-17 | <<locked>> | 96% | 55,187 psi | 86% | 3146 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 38,043 psi | 60% | 2808 fps | 97.9% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 42,656 psi | 67% | 2972 fps | 97.1% |
| Baschieri & Pellagri 107 | <<locked>> | 88% | 56,594 psi | 89% | 3068 fps | 99.6% |
| Bofors RP3 | <<locked>> | 92% | 54,549 psi | 85% | 3035 fps | 100% |
| Bofors RP7 | <<locked>> | 96% | 54,795 psi | 86% | 2999 fps | 96.7% |
| Hodgdon Benchmark | <<locked>> | 86% | 57,508 psi | 90% | 2989 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 86% | 55,042 psi | 86% | 3031 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 84% | 57,348 psi | 90% | 3140 fps | 99.8% |
| Hodgdon H322 | <<locked>> | 84% | 55,448 psi | 87% | 2986 fps | 100% |
| Hodgdon H380 | <<locked>> | 92% | 55,796 psi | 87% | 3048 fps | 99.2% |
| Hodgdon H414 | <<locked>> | 96% | 57,145 psi | 90% | 3123 fps | 97.9% |
| Hodgdon H4350ᴾ | <<locked>> | 100% | 57,479 psi | 90% | 3081 fps | 96.6% |
| Hodgdon H4895 | <<locked>> | 88% | 57,290 psi | 90% | 3064 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 49,879 psi | 78% | 2972 fps | 99.8% |
| Hodgdon LEVERevolution | <<locked>> | 92% | 56,855 psi | 89% | 3097 fps | 100% |
| Hodgdon Superformance | <<locked>> | 98% | 56,536 psi | 89% | 3136 fps | 97.3% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,128 psi | 55% | 1857 fps | 100% |
| Hodgdon VARGET | <<locked>> | 92% | 57,261 psi | 90% | 3048 fps | 100% |
| IMR 3031 | <<locked>> | 90% | 55,477 psi | 87% | 3022 fps | 100% |
| IMR 4064 | <<locked>> | 94% | 56,275 psi | 88% | 3022 fps | 99.8% |
| IMR 4166 Enduron | <<locked>> | 94% | 55,724 psi | 87% | 2989 fps | 97.4% |
| IMR 4198 | <<locked>> | 82% | 56,942 psi | 89% | 2910 fps | 100% |
| IMR 4350ᴾ | <<locked>> | 100% | 55,187 psi | 86% | 3025 fps | 96.9% |
| IMR 4451 Enduron | <<locked>> | 96% | 56,869 psi | 89% | 3035 fps | 97.6% |
| IMR 4831ᴾ | <<locked>> | 100% | 46,920 psi | 74% | 2930 fps | 98.4% |
| IMR 4895 | <<locked>> | 90% | 56,086 psi | 88% | 3074 fps | 99.9% |
| IMR 8208 XBR | <<locked>> | 86% | 55,579 psi | 87% | 3002 fps | 100% |
| Lovex D073.5 | <<locked>> | 82% | 55,550 psi | 87% | 2982 fps | 100% |
| Lovex D073.6 | <<locked>> | 88% | 56,449 psi | 88% | 3028 fps | 100% |
| Lovex S060 | <<locked>> | 88% | 56,275 psi | 88% | 2979 fps | 99.9% |
| Lovex S062 | <<locked>> | 92% | 56,884 psi | 89% | 3028 fps | 100% |
| Lovex S065 | <<locked>> | 98% | 55,956 psi | 88% | 3022 fps | 98.6% |
| Lovex S070ᴾ | <<locked>> | 100% | 57,145 psi | 90% | 3061 fps | 97.9% |
| Norma 201 | <<locked>> | 88% | 55,158 psi | 86% | 2995 fps | 100% |
| Norma 202 | <<locked>> | 88% | 55,811 psi | 87% | 2999 fps | 100% |
| Norma 203B | <<locked>> | 92% | 57,363 psi | 90% | 3081 fps | 100% |
| Norma URPᴾ | <<locked>> | 100% | 55,114 psi | 86% | 3087 fps | 99.4% |
| Ramshot Big Game | <<locked>> | 90% | 54,505 psi | 85% | 3051 fps | 99.8% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 54,012 psi | 85% | 3081 fps | 98.1% |
| Ramshot TAC | <<locked>> | 86% | 56,028 psi | 88% | 3018 fps | 98.8% |
| Ramshot Wild Boar | <<locked>> | 86% | 55,753 psi | 87% | 3041 fps | 99.9% |
| Ramshot X-Terminator | <<locked>> | 84% | 56,724 psi | 89% | 3005 fps | 99.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,665 psi | 56% | 1903 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 54,984 psi | 86% | 2982 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 92% | 56,130 psi | 88% | 3028 fps | 98.1% |
| ReloadSwiss RS 52 | <<locked>> | 88% | 55,245 psi | 87% | 3114 fps | 99.7% |
| ReloadSwiss RS 60 | <<locked>> | 94% | 54,984 psi | 86% | 3150 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 55,869 psi | 88% | 3123 fps | 99.4% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 55,840 psi | 88% | 3156 fps | 99.2% |
| Rottweil R 901 | <<locked>> | 86% | 55,724 psi | 87% | 2972 fps | 100% |
| Rottweil R 902 | <<locked>> | 90% | 55,521 psi | 87% | 2989 fps | 100% |
| Rottweil R 903 | <<locked>> | 94% | 54,404 psi | 85% | 3025 fps | 100% |
| Rottweil R 907 | <<locked>> | 96% | 54,795 psi | 86% | 2999 fps | 96.7% |
| Shooters World Long Rifle | <<locked>> | 98% | 55,956 psi | 88% | 3022 fps | 98.6% |
| Shooters World Match Rifle | <<locked>> | 88% | 56,449 psi | 88% | 3028 fps | 100% |
| Shooters World Precision | <<locked>> | 92% | 56,884 psi | 89% | 3028 fps | 100% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 57,145 psi | 90% | 3061 fps | 97.9% |
| SNPE Vectan SP 11 | <<locked>> | 94% | 56,463 psi | 88% | 3091 fps | 99.9% |
| SNPE Vectan SP 7 | <<locked>> | 86% | 54,317 psi | 85% | 2995 fps | 98.9% |
| SNPE Vectan SP 9 | <<locked>> | 88% | 55,129 psi | 86% | 3022 fps | 99.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 88% | 56,971 psi | 89% | 2936 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 94% | 57,276 psi | 90% | 2930 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 98% | 56,695 psi | 89% | 2979 fps | 97.6% |
| Somchem S321 | <<locked>> | 84% | 57,087 psi | 89% | 3038 fps | 100% |
| Somchem S335 | <<locked>> | 88% | 56,144 psi | 88% | 2930 fps | 100% |
| Somchem S341 | <<locked>> | 88% | 57,740 psi | 90% | 3041 fps | 99.9% |
| Somchem S355 | <<locked>> | 94% | 54,737 psi | 86% | 3022 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 49,197 psi | 77% | 3028 fps | 100% |
| Unknown powder | <<locked>> | 98% | 56,347 psi | 88% | 3097 fps | 99.1% |
| Vihtavuori N130 | <<locked>> | 84% | 55,332 psi | 87% | 2881 fps | 100% |
| Vihtavuori N133 | <<locked>> | 90% | 56,362 psi | 88% | 2910 fps | 100% |
| Vihtavuori N135 | <<locked>> | 90% | 55,274 psi | 87% | 2956 fps | 100% |
| Vihtavuori N140 | <<locked>> | 90% | 55,492 psi | 87% | 2963 fps | 100% |
| Vihtavuori N150ᴾ | <<locked>> | 100% | 56,115 psi | 88% | 3002 fps | 100% |
| Vihtavuori N160 | <<locked>> | 98% | 56,884 psi | 89% | 3068 fps | 99.5% |
| Vihtavuori N530 | <<locked>> | 84% | 55,332 psi | 87% | 3009 fps | 100% |
| Vihtavuori N540 | <<locked>> | 90% | 55,448 psi | 87% | 2992 fps | 100% |
| Vihtavuori N550 | <<locked>> | 98% | 57,101 psi | 89% | 3117 fps | 99.5% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 41,597 psi | 65% | 2890 fps | 97.9% |
| Winchester 6.5 StaBALL | <<locked>> | 98% | 54,534 psi | 85% | 3009 fps | 100% |
| Winchester 748 | <<locked>> | 84% | 56,985 psi | 89% | 3064 fps | 100% |
| Winchester 760 | <<locked>> | 96% | 57,145 psi | 90% | 3123 fps | 97.9% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 34,026 psi | 53% | 2792 fps | 97.3% |
| Winchester StaBALL Match | <<locked>> | 82% | 56,449 psi | 88% | 3051 fps | 100% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 80% | 47,427 psi | 74% | 2802 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 52,040 psi | 82% | 2917 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 39,566 psi | 62% | 2707 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 45,542 psi | 71% | 2854 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 45,542 psi | 71% | 2854 fps | 100% |
| Accurate 2700 | <<locked>> | 90% | 49,588 psi | 78% | 2854 fps | 95.3% |
| Accurate 4064 | <<locked>> | 80% | 37,434 psi | 59% | 2694 fps | 99.9% |
| Accurate 4350 | <<locked>> | 88% | 36,477 psi | 57% | 2733 fps | 95.6% |
| ADI AR 2206H | <<locked>> | 80% | 43,729 psi | 69% | 2825 fps | 98.6% |
| ADI AR 2208 | <<locked>> | 80% | 37,101 psi | 58% | 2664 fps | 96.4% |
| ADI Benchmark 8208 | <<locked>> | 80% | 45,876 psi | 72% | 2838 fps | 99.6% |
| Alliant AR-Comp | <<locked>> | 80% | 46,137 psi | 72% | 2828 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 53,780 psi | 84% | 3058 fps | 99.9% |
| Alliant Power Pro 2000-MR | 57 gr | 80% | 39,798 psi | 62% | 2848 fps | 97% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 36,579 psi | 57% | 2684 fps | 97.9% |
| Alliant Reloder-10x | <<locked>> | 80% | 53,403 psi | 84% | 2900 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 39,421 psi | 62% | 2753 fps | 97.3% |
| Alliant Reloder-16 | <<locked>> | 88% | 36,651 psi | 57% | 2746 fps | 95.7% |
| Alliant Reloder-17 | 56.1 gr | 80% | 31,560 psi | 49% | 2635 fps | 95.4% |
| Alliant Reloder-23 | <<locked>> | 94% | 31,488 psi | 49% | 2631 fps | 95.2% |
| Alliant Reloder-26 | <<locked>> | 98% | 39,711 psi | 62% | 2904 fps | 96.1% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 43,120 psi | 68% | 2828 fps | 97.6% |
| Bofors RP3 | <<locked>> | 80% | 36,143 psi | 57% | 2684 fps | 97.9% |
| Bofors RP7 | <<locked>> | 92% | 48,327 psi | 76% | 2884 fps | 95.3% |
| Hodgdon Benchmark | <<locked>> | 80% | 47,688 psi | 75% | 2828 fps | 99.9% |
| Hodgdon BL-C2 | <<locked>> | 80% | 44,657 psi | 70% | 2854 fps | 99.8% |
| Hodgdon CFE223 | <<locked>> | 80% | 49,472 psi | 78% | 3009 fps | 99.2% |
| Hodgdon H322 | <<locked>> | 80% | 48,675 psi | 76% | 2881 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 37,144 psi | 58% | 2690 fps | 95.2% |
| Hodgdon H414 | <<locked>> | 90% | 46,398 psi | 73% | 2936 fps | 95.6% |
| Hodgdon H4350 | <<locked>> | 96% | 50,691 psi | 79% | 2966 fps | 95.1% |
| Hodgdon H4895 | <<locked>> | 80% | 44,135 psi | 69% | 2838 fps | 99.1% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 31,401 psi | 49% | 2575 fps | 95.5% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 37,840 psi | 59% | 2749 fps | 98.3% |
| Hodgdon Superformance | <<locked>> | 94% | 48,675 psi | 76% | 2999 fps | 95.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,063 psi | 41% | 1660 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 39,349 psi | 62% | 2723 fps | 98.2% |
| IMR 3031 | <<locked>> | 80% | 40,001 psi | 63% | 2766 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 36,274 psi | 57% | 2638 fps | 96.4% |
| IMR 4166 Enduron | <<locked>> | 88% | 46,557 psi | 73% | 2825 fps | 95.5% |
| IMR 4198 | <<locked>> | 80% | 53,679 psi | 84% | 2864 fps | 100% |
| IMR 4350 | <<locked>> | 96% | 48,689 psi | 76% | 2913 fps | 95.4% |
| IMR 4451 Enduron | <<locked>> | 90% | 47,282 psi | 74% | 2867 fps | 95.5% |
| IMR 4831 | <<locked>> | 92% | 36,042 psi | 56% | 2703 fps | 95.5% |
| IMR 4895 | <<locked>> | 80% | 40,379 psi | 63% | 2785 fps | 98.1% |
| IMR 8208 XBR | <<locked>> | 80% | 45,876 psi | 72% | 2838 fps | 99.6% |
| Lovex D073.5 | <<locked>> | 80% | 51,851 psi | 81% | 2927 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 42,627 psi | 67% | 2802 fps | 99.9% |
| Lovex S060 | <<locked>> | 80% | 44,005 psi | 69% | 2766 fps | 98.7% |
| Lovex S062 | <<locked>> | 80% | 38,885 psi | 61% | 2707 fps | 98.7% |
| Lovex S065 | <<locked>> | 88% | 41,002 psi | 64% | 2749 fps | 95.5% |
| Lovex S070 | <<locked>> | 92% | 44,237 psi | 69% | 2831 fps | 95.1% |
| Norma 201 | <<locked>> | 80% | 42,569 psi | 67% | 2772 fps | 99.3% |
| Norma 202 | <<locked>> | 80% | 43,047 psi | 67% | 2785 fps | 100% |
| Norma 203B | <<locked>> | 80% | 38,783 psi | 61% | 2740 fps | 97.6% |
| Norma URP | <<locked>> | 88% | 36,782 psi | 58% | 2733 fps | 95.5% |
| Ramshot Big Game | <<locked>> | 80% | 38,450 psi | 60% | 2753 fps | 97.4% |
| Ramshot Hunter | <<locked>> | 94% | 44,034 psi | 69% | 2897 fps | 95.9% |
| Ramshot TAC | <<locked>> | 80% | 45,876 psi | 72% | 2838 fps | 97% |
| Ramshot Wild Boar | <<locked>> | 80% | 45,411 psi | 71% | 2864 fps | 98.9% |
| Ramshot X-Terminator | <<locked>> | 80% | 49,574 psi | 78% | 2887 fps | 99.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,440 psi | 41% | 1703 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 51,634 psi | 81% | 2930 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 42,960 psi | 67% | 2789 fps | 95.2% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 41,640 psi | 65% | 2861 fps | 97.8% |
| ReloadSwiss RS 60 | 56.1 gr | 80% | 33,649 psi | 53% | 2710 fps | 98.7% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 36,376 psi | 57% | 2749 fps | 95.1% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 39,204 psi | 61% | 2822 fps | 95.2% |
| Rottweil R 901 | <<locked>> | 80% | 46,383 psi | 73% | 2822 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 40,596 psi | 64% | 2723 fps | 99% |
| Rottweil R 903 | <<locked>> | 80% | 33,852 psi | 53% | 2621 fps | 96.8% |
| Rottweil R 907 | <<locked>> | 92% | 48,327 psi | 76% | 2884 fps | 95.3% |
| Shooters World Long Rifle | <<locked>> | 88% | 41,002 psi | 64% | 2749 fps | 95.5% |
| Shooters World Match Rifle | <<locked>> | 80% | 42,627 psi | 67% | 2802 fps | 99.9% |
| Shooters World Precision | <<locked>> | 80% | 38,885 psi | 61% | 2707 fps | 98.7% |
| Shooters World SW4350 | <<locked>> | 92% | 44,237 psi | 69% | 2831 fps | 95.1% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 35,186 psi | 55% | 2677 fps | 96.4% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 44,005 psi | 69% | 2808 fps | 97.1% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 42,395 psi | 66% | 2795 fps | 98.4% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 44,208 psi | 69% | 2733 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 36,680 psi | 57% | 2592 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 46,398 psi | 73% | 2805 fps | 95.5% |
| Somchem S321 | <<locked>> | 80% | 49,748 psi | 78% | 2923 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 43,642 psi | 68% | 2730 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 43,903 psi | 69% | 2812 fps | 98.6% |
| Somchem S355 | <<locked>> | 80% | 34,795 psi | 55% | 2631 fps | 96.9% |
| Somchem S365 | <<locked>> | 84% | 28,689 psi | 45% | 2556 fps | 95.9% |
| Unknown powder | <<locked>> | 86% | 37,565 psi | 59% | 2740 fps | 95% |
| Vihtavuori N130 | <<locked>> | 80% | 48,965 psi | 77% | 2789 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 41,713 psi | 65% | 2684 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 40,074 psi | 63% | 2710 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 40,321 psi | 63% | 2713 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 29,660 psi | 46% | 2480 fps | 96.6% |
| Vihtavuori N160 | <<locked>> | 86% | 37,681 psi | 59% | 2717 fps | 95.8% |
| Vihtavuori N530 | <<locked>> | 80% | 48,370 psi | 76% | 2894 fps | 99.9% |
| Vihtavuori N540 | <<locked>> | 80% | 39,929 psi | 63% | 2726 fps | 99.9% |
| Vihtavuori N550 | <<locked>> | 86% | 38,145 psi | 60% | 2759 fps | 95.8% |
| Vihtavuori N555 | <<locked>> | 94% | 33,765 psi | 53% | 2710 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 31,531 psi | 49% | 2539 fps | 95.7% |
| Winchester 748 | <<locked>> | 80% | 49,400 psi | 77% | 2946 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 46,398 psi | 73% | 2936 fps | 95.6% |
| Winchester StaBALL HD | <<locked>> | 98% | 31,792 psi | 50% | 2717 fps | 96% |
| Winchester StaBALL Match | <<locked>> | 80% | 52,489 psi | 82% | 2989 fps | 99.9% |
Recommended = one of the top powders for this cartridge and bullet combination.
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 103 powders for .300 WSM loaded with the .308 | 152gr | MRR Green Hunting. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 3,179 fps; across all powders the maximum-charge window runs from 1,857 fps to 3,179 fps. Accurate 4350 gives the best case fill at 100 %, and 103 of the 103 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 53–90 %, leaving at least 10 % headroom. The 152.0 gr projectile in 0.308" calls for a 1:13.5 twist; slower twists will usually not stabilise this weight. Accurate 4350, Alliant Reloder-16, Alliant Reloder-23 reach 100 % fill or more at maximum charge, so these are compressed loads: they need a long drop tube to seat cleanly and react sensitively to the case capacity of your own brass lot. Alliant Reloder-17, ReloadSwiss RS 60, Alliant Power Pro 2000-MR rank at the top here: for .300 WSM with the .308 | 152gr | MRR Green Hunting they combine a high case fill with complete burn and sit in the upper velocity band. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.