Load Specifications
Load data in caliber .300 WSM with .308 | 140gr | Barnes RRLP bullet and 100 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 60, Alliant Power Pro 2000-MR and ReloadSwiss RS 52.
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>> | 88% | 57,261 psi | 90% | 3048 fps | 100% |
| Accurate 2460 | <<locked>> | 84% | 55,825 psi | 87% | 3071 fps | 100% |
| Accurate 2495 | <<locked>> | 92% | 55,448 psi | 87% | 3064 fps | 100% |
| Accurate 2520 | <<locked>> | 88% | 55,985 psi | 88% | 3120 fps | 100% |
| Accurate 4064 | <<locked>> | 94% | 54,998 psi | 86% | 3104 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 50,836 psi | 80% | 3110 fps | 98.1% |
| Accurate LT-30 | <<locked>> | 82% | 56,130 psi | 88% | 2986 fps | 100% |
| Accurate LT-32 | <<locked>> | 82% | 56,536 psi | 89% | 3015 fps | 100% |
| ADI AR 2206H | <<locked>> | 90% | 56,449 psi | 88% | 3143 fps | 99.6% |
| ADI AR 2208 | <<locked>> | 96% | 57,232 psi | 90% | 3136 fps | 99.3% |
| ADI AR 2219 | <<locked>> | 82% | 57,508 psi | 90% | 3117 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 88% | 55,521 psi | 87% | 3097 fps | 99.9% |
| Alliant AR-Comp | <<locked>> | 88% | 55,680 psi | 87% | 3077 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 84% | 57,203 psi | 90% | 3215 fps | 99.8% |
| Alliant Power Pro 2000-MR | <<locked>> | 92% | 55,869 psi | 88% | 3258 fps | 99.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 96% | 56,782 psi | 89% | 3156 fps | 99.9% |
| Alliant Reloder-10x | <<locked>> | 84% | 56,826 psi | 89% | 3054 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 92% | 54,273 psi | 85% | 3127 fps | 99.1% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 49,792 psi | 78% | 3117 fps | 98.2% |
| Alliant Reloder-17 | <<locked>> | 98% | 54,259 psi | 85% | 3225 fps | 99.8% |
| Baschieri & Pellagri 106 | <<locked>> | 82% | 55,521 psi | 87% | 2979 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 90% | 56,275 psi | 88% | 3153 fps | 99% |
| Bofors RP3 | <<locked>> | 96% | 57,609 psi | 90% | 3176 fps | 99.9% |
| Hodgdon Benchmark | <<locked>> | 88% | 57,406 psi | 90% | 3081 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 88% | 54,665 psi | 86% | 3123 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 86% | 56,579 psi | 89% | 3225 fps | 99.3% |
| Hodgdon H322 | <<locked>> | 86% | 55,187 psi | 86% | 3084 fps | 100% |
| Hodgdon H335 | <<locked>> | 82% | 56,768 psi | 89% | 3114 fps | 100% |
| Hodgdon H380 | <<locked>> | 94% | 55,332 psi | 87% | 3130 fps | 98.3% |
| Hodgdon H414 | <<locked>> | 98% | 56,130 psi | 88% | 3199 fps | 96.5% |
| Hodgdon H4895 | <<locked>> | 90% | 56,956 psi | 89% | 3156 fps | 99.8% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 45,759 psi | 72% | 2986 fps | 98.6% |
| Hodgdon LEVERevolution | <<locked>> | 94% | 55,912 psi | 88% | 3186 fps | 99.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,838 psi | 55% | 1913 fps | 100% |
| Hodgdon VARGET | <<locked>> | 94% | 57,000 psi | 89% | 3136 fps | 99.8% |
| IMR 3031 | <<locked>> | 92% | 54,636 psi | 86% | 3120 fps | 100% |
| IMR 4064 | <<locked>> | 96% | 55,738 psi | 87% | 3104 fps | 99.3% |
| IMR 4166 Enduron | <<locked>> | 96% | 55,506 psi | 87% | 3064 fps | 96.2% |
| IMR 4198 | <<locked>> | 84% | 56,695 psi | 89% | 3012 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 98% | 56,565 psi | 89% | 3114 fps | 96.3% |
| IMR 4831ᴾ | <<locked>> | 100% | 42,960 psi | 67% | 2940 fps | 96.4% |
| IMR 4895 | <<locked>> | 92% | 55,637 psi | 87% | 3163 fps | 99.6% |
| IMR 8208 XBR | <<locked>> | 88% | 55,521 psi | 87% | 3097 fps | 99.9% |
| Lovex D073.5 | <<locked>> | 84% | 55,608 psi | 87% | 3077 fps | 100% |
| Lovex D073.6 | <<locked>> | 90% | 55,709 psi | 87% | 3117 fps | 100% |
| Lovex S060 | <<locked>> | 90% | 56,188 psi | 88% | 3068 fps | 99.5% |
| Lovex S062 | <<locked>> | 94% | 56,347 psi | 88% | 3117 fps | 100% |
| Lovex S065ᴾ | <<locked>> | 100% | 55,434 psi | 87% | 3100 fps | 97.6% |
| Lovex S070ᴾ | <<locked>> | 100% | 52,808 psi | 83% | 3074 fps | 96% |
| Norma 201 | <<locked>> | 90% | 54,998 psi | 86% | 3087 fps | 99.9% |
| Norma 202 | <<locked>> | 90% | 55,405 psi | 87% | 3091 fps | 100% |
| Norma 203B | <<locked>> | 94% | 56,956 psi | 89% | 3173 fps | 99.6% |
| Norma URPᴾ | <<locked>> | 100% | 50,241 psi | 79% | 3097 fps | 97.9% |
| Ramshot Big Game | <<locked>> | 94% | 57,537 psi | 90% | 3196 fps | 99.6% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 49,676 psi | 78% | 3087 fps | 96% |
| Ramshot TAC | <<locked>> | 88% | 55,985 psi | 88% | 3104 fps | 97.9% |
| Ramshot Wild Boar | <<locked>> | 88% | 55,419 psi | 87% | 3127 fps | 99.5% |
| Ramshot X-Terminator | <<locked>> | 86% | 56,608 psi | 89% | 3094 fps | 99.5% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,360 psi | 55% | 1959 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 84% | 54,882 psi | 86% | 3077 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 94% | 55,796 psi | 87% | 3107 fps | 97% |
| ReloadSwiss RS 52 | <<locked>> | 90% | 54,360 psi | 85% | 3196 fps | 99.1% |
| ReloadSwiss RS 60 | <<locked>> | 96% | 53,969 psi | 85% | 3232 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 50,459 psi | 79% | 3130 fps | 97.8% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 51,314 psi | 80% | 3156 fps | 97.4% |
| Rottweil R 901 | <<locked>> | 88% | 55,912 psi | 88% | 3074 fps | 100% |
| Rottweil R 902 | <<locked>> | 92% | 55,390 psi | 87% | 3081 fps | 99.9% |
| Rottweil R 903 | <<locked>> | 98% | 57,450 psi | 90% | 3166 fps | 99.9% |
| Shooters World Long Rifleᴾ | <<locked>> | 100% | 55,434 psi | 87% | 3100 fps | 97.6% |
| Shooters World Match Rifle | <<locked>> | 90% | 55,709 psi | 87% | 3117 fps | 100% |
| Shooters World Precision | <<locked>> | 94% | 56,347 psi | 88% | 3117 fps | 100% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 52,808 psi | 83% | 3074 fps | 96% |
| Shooters World Tactical Rifle | <<locked>> | 82% | 54,621 psi | 86% | 3041 fps | 99.8% |
| SNPE Vectan SP 11 | <<locked>> | 96% | 55,695 psi | 87% | 3173 fps | 99.5% |
| SNPE Vectan SP 3 | <<locked>> | 84% | 57,711 psi | 90% | 3077 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 88% | 54,114 psi | 85% | 3077 fps | 98% |
| SNPE Vectan SP 9 | <<locked>> | 90% | 54,868 psi | 86% | 3110 fps | 99.4% |
| SNPE Vectan Tubal 3000 | <<locked>> | 90% | 56,913 psi | 89% | 3031 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 96% | 56,913 psi | 89% | 3025 fps | 100% |
| SNPE Vectan Tubal 7000ᴾ | <<locked>> | 100% | 56,376 psi | 88% | 3051 fps | 96.3% |
| Somchem S321 | <<locked>> | 86% | 56,840 psi | 89% | 3130 fps | 100% |
| Somchem S335 | <<locked>> | 90% | 56,043 psi | 88% | 3025 fps | 100% |
| Somchem S341 | <<locked>> | 90% | 57,464 psi | 90% | 3130 fps | 99.6% |
| Somchem S355 | <<locked>> | 96% | 54,186 psi | 85% | 3107 fps | 99.6% |
| Somchem S365ᴾ | <<locked>> | 100% | 44,976 psi | 70% | 3045 fps | 99.5% |
| Unknown powderᴾ | <<locked>> | 100% | 55,056 psi | 86% | 3169 fps | 98.1% |
| Vihtavuori N120 | <<locked>> | 82% | 57,319 psi | 90% | 2940 fps | 100% |
| Vihtavuori N130 | <<locked>> | 86% | 55,332 psi | 87% | 2982 fps | 100% |
| Vihtavuori N133 | <<locked>> | 92% | 56,072 psi | 88% | 3009 fps | 100% |
| Vihtavuori N135 | <<locked>> | 92% | 54,694 psi | 86% | 3051 fps | 100% |
| Vihtavuori N140 | <<locked>> | 92% | 55,158 psi | 86% | 3058 fps | 100% |
| Vihtavuori N150ᴾ | <<locked>> | 100% | 52,054 psi | 82% | 3035 fps | 99.9% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 55,956 psi | 88% | 3143 fps | 98.7% |
| Vihtavuori N530 | <<locked>> | 86% | 55,230 psi | 87% | 3104 fps | 99.9% |
| Vihtavuori N540 | <<locked>> | 92% | 54,940 psi | 86% | 3087 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 56,159 psi | 88% | 3196 fps | 98.7% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 54,186 psi | 85% | 3087 fps | 99.7% |
| Winchester 748 | <<locked>> | 86% | 56,362 psi | 88% | 3156 fps | 100% |
| Winchester 760 | <<locked>> | 98% | 56,130 psi | 88% | 3199 fps | 96.5% |
| Winchester StaBALL Match | <<locked>> | 84% | 56,347 psi | 88% | 3146 fps | 99.8% |
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% | 44,541 psi | 70% | 2848 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 48,805 psi | 76% | 2959 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 37,086 psi | 58% | 2746 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 42,337 psi | 66% | 2887 fps | 99.6% |
| Accurate 4064 | <<locked>> | 80% | 35,070 psi | 55% | 2726 fps | 99.1% |
| Accurate 4350 | <<locked>> | 94% | 41,292 psi | 65% | 2927 fps | 95.9% |
| Accurate LT-30 | <<locked>> | 80% | 52,953 psi | 83% | 2936 fps | 100% |
| Accurate LT-32 | <<locked>> | 80% | 53,287 psi | 84% | 2966 fps | 100% |
| ADI AR 2206H | <<locked>> | 80% | 41,075 psi | 64% | 2851 fps | 97.1% |
| ADI AR 2208 | <<locked>> | 82% | 37,144 psi | 58% | 2743 fps | 95.1% |
| ADI AR 2219 | <<locked>> | 80% | 53,809 psi | 84% | 3061 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 80% | 43,076 psi | 68% | 2871 fps | 98.6% |
| Alliant AR-Comp | <<locked>> | 80% | 42,612 psi | 67% | 2874 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 50,111 psi | 79% | 3091 fps | 99.3% |
| Alliant Power Pro 2000-MR | 56.6 gr | 82% | 39,639 psi | 62% | 2920 fps | 95.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 34,142 psi | 54% | 2703 fps | 95.9% |
| Alliant Reloder-10x | <<locked>> | 80% | 50,111 psi | 79% | 2953 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 36,869 psi | 58% | 2772 fps | 95.2% |
| Alliant Reloder-16 | <<locked>> | 94% | 41,336 psi | 65% | 2936 fps | 95.9% |
| Alliant Reloder-17 | <<locked>> | 86% | 36,129 psi | 57% | 2835 fps | 95.9% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 52,040 psi | 82% | 2927 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 40,030 psi | 63% | 2844 fps | 95.6% |
| Bofors RP3 | <<locked>> | 80% | 33,547 psi | 53% | 2700 fps | 95.9% |
| Hodgdon Benchmark | <<locked>> | 80% | 44,991 psi | 71% | 2867 fps | 99.3% |
| Hodgdon BL-C2 | <<locked>> | 80% | 41,640 psi | 65% | 2884 fps | 98.8% |
| Hodgdon CFE223 | <<locked>> | 80% | 45,716 psi | 72% | 3031 fps | 97.7% |
| Hodgdon H322 | <<locked>> | 80% | 45,701 psi | 72% | 2927 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 53,055 psi | 83% | 3058 fps | 100% |
| Hodgdon H380 | <<locked>> | 86% | 42,409 psi | 66% | 2887 fps | 95.5% |
| Hodgdon H414 | <<locked>> | 96% | 52,330 psi | 82% | 3130 fps | 95.7% |
| Hodgdon H4895 | <<locked>> | 80% | 41,379 psi | 65% | 2867 fps | 97.7% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 35,476 psi | 56% | 2759 fps | 95.8% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 35,070 psi | 55% | 2766 fps | 96.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,991 psi | 41% | 1713 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 36,854 psi | 58% | 2746 fps | 96.4% |
| IMR 3031 | <<locked>> | 80% | 37,115 psi | 58% | 2799 fps | 99.9% |
| IMR 4064 | <<locked>> | 82% | 36,318 psi | 57% | 2717 fps | 95.1% |
| IMR 4166 Enduron | <<locked>> | 94% | 52,402 psi | 82% | 3012 fps | 95.5% |
| IMR 4198 | <<locked>> | 80% | 50,488 psi | 79% | 2920 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 96% | 53,156 psi | 83% | 3054 fps | 95.6% |
| IMR 4831 | <<locked>> | 98% | 40,350 psi | 63% | 2884 fps | 95.7% |
| IMR 4895 | <<locked>> | 80% | 37,753 psi | 59% | 2808 fps | 96.2% |
| IMR 8208 XBR | <<locked>> | 80% | 43,076 psi | 68% | 2871 fps | 98.6% |
| Lovex D073.5 | <<locked>> | 80% | 48,660 psi | 76% | 2966 fps | 99.8% |
| Lovex D073.6 | <<locked>> | 80% | 39,813 psi | 62% | 2835 fps | 99.2% |
| Lovex S060 | <<locked>> | 80% | 41,524 psi | 65% | 2795 fps | 97.3% |
| Lovex S062 | <<locked>> | 80% | 36,463 psi | 57% | 2733 fps | 97.2% |
| Lovex S065 | <<locked>> | 94% | 46,064 psi | 72% | 2933 fps | 95.6% |
| Lovex S070 | <<locked>> | 98% | 49,734 psi | 78% | 3022 fps | 95.2% |
| Norma 201 | <<locked>> | 80% | 40,118 psi | 63% | 2805 fps | 98.1% |
| Norma 202 | <<locked>> | 80% | 40,292 psi | 63% | 2822 fps | 99.6% |
| Norma 203B | <<locked>> | 80% | 36,260 psi | 57% | 2762 fps | 95.7% |
| Norma URP | <<locked>> | 94% | 41,452 psi | 65% | 2923 fps | 95.8% |
| Ramshot Big Game | <<locked>> | 80% | 35,737 psi | 56% | 2769 fps | 95.2% |
| Ramshot Hunter | <<locked>> | 98% | 46,340 psi | 73% | 3022 fps | 95.1% |
| Ramshot TAC | <<locked>> | 82% | 45,890 psi | 72% | 2920 fps | 95.7% |
| Ramshot Wild Boar | <<locked>> | 80% | 42,221 psi | 66% | 2884 fps | 97.4% |
| Ramshot X-Terminator | <<locked>> | 80% | 46,673 psi | 73% | 2920 fps | 98.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,179 psi | 41% | 1752 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 48,312 psi | 76% | 2966 fps | 99.9% |
| ReloadSwiss RS 50 | <<locked>> | 90% | 48,950 psi | 77% | 2989 fps | 95.5% |
| ReloadSwiss RS 52 | 53.6 gr | 80% | 38,232 psi | 60% | 2874 fps | 95.6% |
| ReloadSwiss RS 60 | 54.4 gr | 80% | 31,444 psi | 49% | 2717 fps | 96.5% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 41,162 psi | 65% | 2940 fps | 95.4% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 44,657 psi | 70% | 3018 fps | 95.5% |
| Rottweil R 901 | <<locked>> | 80% | 44,048 psi | 69% | 2867 fps | 99.8% |
| Rottweil R 902 | <<locked>> | 80% | 38,218 psi | 60% | 2753 fps | 97.6% |
| Rottweil R 903 | <<locked>> | 82% | 33,808 psi | 53% | 2700 fps | 95.6% |
| Shooters World Long Rifle | <<locked>> | 94% | 46,064 psi | 72% | 2933 fps | 95.6% |
| Shooters World Match Rifle | <<locked>> | 80% | 39,813 psi | 62% | 2835 fps | 99.2% |
| Shooters World Precision | <<locked>> | 80% | 36,463 psi | 57% | 2733 fps | 97.2% |
| Shooters World SW4350 | <<locked>> | 98% | 49,734 psi | 78% | 3022 fps | 95.2% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 51,184 psi | 80% | 2986 fps | 99.5% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 37,275 psi | 58% | 2812 fps | 95.8% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 51,082 psi | 80% | 2979 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 41,176 psi | 65% | 2831 fps | 95% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 39,624 psi | 62% | 2815 fps | 96.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 41,785 psi | 65% | 2776 fps | 99.7% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 34,519 psi | 54% | 2625 fps | 99.4% |
| SNPE Vectan Tubal 7000 | <<locked>> | 98% | 52,707 psi | 83% | 2995 fps | 95.6% |
| Somchem S321 | <<locked>> | 80% | 46,412 psi | 73% | 2953 fps | 99.3% |
| Somchem S335 | <<locked>> | 80% | 41,162 psi | 65% | 2772 fps | 99.9% |
| Somchem S341 | <<locked>> | 80% | 40,756 psi | 64% | 2828 fps | 96.9% |
| Somchem S355 | <<locked>> | 82% | 34,780 psi | 55% | 2710 fps | 95.7% |
| Somchem S365 | <<locked>> | 88% | 30,530 psi | 48% | 2684 fps | 95.2% |
| Unknown powder | <<locked>> | 92% | 42,525 psi | 67% | 2933 fps | 95.3% |
| Vihtavuori N120 | <<locked>> | 80% | 54,259 psi | 85% | 2897 fps | 100% |
| Vihtavuori N130 | <<locked>> | 80% | 46,311 psi | 73% | 2841 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 39,233 psi | 61% | 2726 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 37,405 psi | 59% | 2753 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 37,724 psi | 59% | 2746 fps | 99.5% |
| Vihtavuori N150 | <<locked>> | 82% | 29,660 psi | 46% | 2556 fps | 95.3% |
| Vihtavuori N160 | <<locked>> | 90% | 39,972 psi | 63% | 2844 fps | 95.1% |
| Vihtavuori N530 | <<locked>> | 80% | 45,368 psi | 71% | 2930 fps | 99.1% |
| Vihtavuori N540 | <<locked>> | 80% | 37,260 psi | 58% | 2756 fps | 99.2% |
| Vihtavuori N550 | <<locked>> | 90% | 40,176 psi | 63% | 2890 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 33,823 psi | 53% | 2667 fps | 95.2% |
| Winchester 748 | <<locked>> | 80% | 45,672 psi | 72% | 2976 fps | 99.6% |
| Winchester 760 | <<locked>> | 96% | 52,330 psi | 82% | 3130 fps | 95.7% |
| Winchester StaBALL Match | <<locked>> | 80% | 48,631 psi | 76% | 3015 fps | 99.1% |
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 113 powders for .300 WSM loaded with the .308 | 140gr | Barnes RRLP. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 3,258 fps; across all powders the maximum-charge window runs from 1,913 fps to 3,258 fps. Accurate 3100 gives the best case fill at 100 %, and 113 of the 113 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 50–90 %, leaving at least 10 % headroom. The 140.0 gr projectile in 0.308" calls for a 1:11.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, Accurate 4350, Alliant Reloder-16 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. ReloadSwiss RS 60, Alliant Power Pro 2000-MR, ReloadSwiss RS 52 rank at the top here: for .300 WSM with the .308 | 140gr | Barnes RRLP they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate 3100, Alliant Reloder-26, Hodgdon H4350 burn incompletely and react more sensitively to barrel length and temperature. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.