Load Specifications
Load data in caliber .300 WSM with .308 | 154gr | Hasler Hunting bullet and 99 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Power Pro 2000-MR, ReloadSwiss RS 60 and Alliant Reloder-17.
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.
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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% | 57,334 psi | 90% | 2927 fps | 100% |
| Accurate 2460 | <<locked>> | 82% | 55,912 psi | 88% | 2956 fps | 100% |
| Accurate 2495 | <<locked>> | 90% | 55,811 psi | 87% | 2946 fps | 100% |
| Accurate 2520 | <<locked>> | 86% | 56,420 psi | 88% | 3009 fps | 100% |
| Accurate 2700 | <<locked>> | 94% | 56,724 psi | 89% | 2953 fps | 96.9% |
| Accurate 4064 | <<locked>> | 92% | 57,638 psi | 90% | 3012 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 57,667 psi | 90% | 3100 fps | 99.7% |
| ADI AR 2206H | <<locked>> | 86% | 54,375 psi | 85% | 2992 fps | 99.8% |
| ADI AR 2208 | <<locked>> | 92% | 55,405 psi | 87% | 2992 fps | 99.7% |
| ADI Benchmark 8208 | <<locked>> | 86% | 56,797 psi | 89% | 2995 fps | 100% |
| Alliant AR-Comp | <<locked>> | 84% | 54,244 psi | 85% | 2923 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 88% | 54,128 psi | 85% | 3114 fps | 99.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 92% | 55,463 psi | 87% | 3015 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 90% | 56,115 psi | 88% | 3038 fps | 99.8% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 55,027 psi | 86% | 3100 fps | 99.7% |
| Alliant Reloder-17 | <<locked>> | 96% | 56,492 psi | 89% | 3143 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 39,450 psi | 62% | 2818 fps | 98.4% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 44,092 psi | 69% | 2982 fps | 97.6% |
| Baschieri & Pellagri 107 | <<locked>> | 86% | 54,331 psi | 85% | 3009 fps | 99.4% |
| Bofors RP3 | <<locked>> | 92% | 56,289 psi | 88% | 3035 fps | 100% |
| Bofors RP7 | <<locked>> | 96% | 56,260 psi | 88% | 2999 fps | 97.1% |
| Hodgdon Benchmark | <<locked>> | 84% | 55,027 psi | 86% | 2927 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 86% | 55,027 psi | 86% | 3012 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 84% | 57,363 psi | 90% | 3120 fps | 99.9% |
| Hodgdon H322 | <<locked>> | 84% | 56,942 psi | 89% | 2979 fps | 100% |
| Hodgdon H380 | <<locked>> | 92% | 57,116 psi | 90% | 3045 fps | 99.3% |
| Hodgdon H414 | <<locked>> | 94% | 54,592 psi | 86% | 3058 fps | 97.5% |
| Hodgdon H4350 | <<locked>> | 98% | 54,273 psi | 85% | 3009 fps | 96% |
| Hodgdon H4895 | <<locked>> | 86% | 54,926 psi | 86% | 3005 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 51,416 psi | 81% | 2972 fps | 99.9% |
| Hodgdon LEVERevolution | <<locked>> | 92% | 56,869 psi | 89% | 3077 fps | 100% |
| Hodgdon Superformance | <<locked>> | 96% | 53,795 psi | 84% | 3071 fps | 96.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,520 psi | 56% | 1847 fps | 100% |
| Hodgdon VARGET | <<locked>> | 92% | 57,464 psi | 90% | 3031 fps | 100% |
| IMR 3031 | <<locked>> | 90% | 56,913 psi | 89% | 3018 fps | 100% |
| IMR 4064 | <<locked>> | 94% | 57,580 psi | 90% | 3015 fps | 99.9% |
| IMR 4166 Enduron | <<locked>> | 94% | 56,985 psi | 89% | 2986 fps | 97.7% |
| IMR 4350ᴾ | <<locked>> | 100% | 56,594 psi | 89% | 3022 fps | 97.2% |
| IMR 4451 Enduron | <<locked>> | 96% | 57,101 psi | 89% | 3022 fps | 97.7% |
| IMR 4831ᴾ | <<locked>> | 100% | 48,312 psi | 76% | 2930 fps | 98.7% |
| IMR 4895 | <<locked>> | 90% | 57,551 psi | 90% | 3071 fps | 100% |
| IMR 8208 XBR | <<locked>> | 86% | 56,797 psi | 89% | 2995 fps | 100% |
| Lovex D073.5 | <<locked>> | 82% | 57,188 psi | 90% | 2979 fps | 100% |
| Lovex D073.6 | <<locked>> | 86% | 54,302 psi | 85% | 2969 fps | 100% |
| Lovex S060 | <<locked>> | 88% | 57,435 psi | 90% | 2972 fps | 100% |
| Lovex S062 | <<locked>> | 90% | 54,926 psi | 86% | 2972 fps | 100% |
| Lovex S065 | <<locked>> | 98% | 57,566 psi | 90% | 3025 fps | 98.9% |
| Lovex S070 | <<locked>> | 98% | 55,027 psi | 86% | 3005 fps | 97.7% |
| Norma 201 | <<locked>> | 88% | 56,637 psi | 89% | 2989 fps | 100% |
| Norma 202 | <<locked>> | 88% | 57,203 psi | 90% | 2992 fps | 100% |
| Norma 203B | <<locked>> | 90% | 55,317 psi | 87% | 3025 fps | 99.9% |
| Norma 204ᴾ | <<locked>> | 100% | 57,450 psi | 90% | 3074 fps | 96.1% |
| Norma URPᴾ | <<locked>> | 100% | 56,434 psi | 88% | 3084 fps | 99.5% |
| Ramshot Big Game | <<locked>> | 90% | 55,956 psi | 88% | 3051 fps | 99.9% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 55,347 psi | 87% | 3081 fps | 98.4% |
| Ramshot TAC | <<locked>> | 86% | 57,363 psi | 90% | 3015 fps | 99% |
| Ramshot Wild Boar | <<locked>> | 86% | 56,840 psi | 89% | 3031 fps | 99.9% |
| Ramshot X-Terminator | <<locked>> | 82% | 54,157 psi | 85% | 2940 fps | 99.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,911 psi | 56% | 1890 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 56,217 psi | 88% | 2972 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 92% | 57,609 psi | 90% | 3025 fps | 98.4% |
| ReloadSwiss RS 52 | <<locked>> | 88% | 56,797 psi | 89% | 3110 fps | 99.8% |
| ReloadSwiss RS 60 | <<locked>> | 94% | 56,231 psi | 88% | 3143 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 57,392 psi | 90% | 3123 fps | 99.5% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 57,174 psi | 90% | 3156 fps | 99.4% |
| Rottweil R 901 | <<locked>> | 86% | 57,609 psi | 90% | 2972 fps | 100% |
| Rottweil R 902 | <<locked>> | 90% | 57,029 psi | 89% | 2986 fps | 100% |
| Rottweil R 903 | <<locked>> | 94% | 56,159 psi | 88% | 3025 fps | 100% |
| Rottweil R 907 | <<locked>> | 96% | 56,260 psi | 88% | 2999 fps | 97.1% |
| Shooters World Long Rifle | <<locked>> | 98% | 57,566 psi | 90% | 3025 fps | 98.9% |
| Shooters World Match Rifle | <<locked>> | 86% | 54,302 psi | 85% | 2969 fps | 100% |
| Shooters World Precision | <<locked>> | 90% | 54,926 psi | 86% | 2972 fps | 100% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 57,232 psi | 90% | 3045 fps | 98% |
| SNPE Vectan SP 11 | <<locked>> | 92% | 54,172 psi | 85% | 3031 fps | 99.8% |
| SNPE Vectan SP 7 | <<locked>> | 86% | 55,811 psi | 87% | 2992 fps | 99.1% |
| SNPE Vectan SP 9 | <<locked>> | 88% | 56,478 psi | 89% | 3018 fps | 99.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 54,650 psi | 86% | 2877 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 92% | 54,955 psi | 86% | 2877 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 96% | 54,375 psi | 85% | 2920 fps | 97.3% |
| Somchem S321 | <<locked>> | 82% | 54,592 psi | 86% | 2976 fps | 100% |
| Somchem S335 | <<locked>> | 88% | 57,508 psi | 90% | 2923 fps | 100% |
| Somchem S341 | <<locked>> | 86% | 55,434 psi | 87% | 2986 fps | 99.9% |
| Somchem S355 | <<locked>> | 94% | 56,289 psi | 88% | 3022 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 50,894 psi | 80% | 3035 fps | 100% |
| Unknown powder | <<locked>> | 98% | 57,609 psi | 90% | 3094 fps | 99.3% |
| Vihtavuori N130 | <<locked>> | 84% | 56,739 psi | 89% | 2874 fps | 100% |
| Vihtavuori N133 | <<locked>> | 90% | 57,566 psi | 90% | 2904 fps | 100% |
| Vihtavuori N135 | <<locked>> | 90% | 55,448 psi | 87% | 2936 fps | 100% |
| Vihtavuori N140 | <<locked>> | 90% | 56,884 psi | 89% | 2956 fps | 100% |
| Vihtavuori N150ᴾ | <<locked>> | 100% | 57,667 psi | 90% | 2999 fps | 100% |
| Vihtavuori N160 | <<locked>> | 96% | 54,592 psi | 86% | 3009 fps | 99.3% |
| Vihtavuori N530 | <<locked>> | 84% | 56,594 psi | 89% | 3002 fps | 100% |
| Vihtavuori N540 | <<locked>> | 90% | 56,579 psi | 89% | 2986 fps | 100% |
| Vihtavuori N550 | <<locked>> | 96% | 54,665 psi | 86% | 3054 fps | 99.3% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 43,091 psi | 68% | 2897 fps | 98.3% |
| Winchester 6.5 StaBALL | <<locked>> | 98% | 55,767 psi | 87% | 3002 fps | 100% |
| Winchester 748 | <<locked>> | 82% | 54,331 psi | 85% | 2999 fps | 100% |
| Winchester 760 | <<locked>> | 94% | 54,592 psi | 86% | 3058 fps | 97.5% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 35,331 psi | 55% | 2808 fps | 98% |
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% | 47,471 psi | 74% | 2782 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 52,170 psi | 82% | 2900 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 39,827 psi | 62% | 2694 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 45,672 psi | 72% | 2838 fps | 100% |
| Accurate 2700 | <<locked>> | 90% | 49,792 psi | 78% | 2841 fps | 95.5% |
| Accurate 4064 | <<locked>> | 80% | 39,349 psi | 62% | 2707 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 35,418 psi | 56% | 2680 fps | 95.3% |
| ADI AR 2206H | <<locked>> | 80% | 44,933 psi | 70% | 2825 fps | 98.9% |
| ADI AR 2208 | <<locked>> | 80% | 38,319 psi | 60% | 2667 fps | 96.9% |
| ADI Benchmark 8208 | <<locked>> | 80% | 47,021 psi | 74% | 2835 fps | 99.8% |
| Alliant AR-Comp | <<locked>> | 80% | 47,427 psi | 74% | 2825 fps | 100% |
| Alliant Power Pro 2000-MR | 56.6 gr | 80% | 40,973 psi | 64% | 2851 fps | 97.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 38,000 psi | 60% | 2694 fps | 98.3% |
| Alliant Reloder-15 | <<locked>> | 80% | 40,654 psi | 64% | 2756 fps | 97.7% |
| Alliant Reloder-16 | <<locked>> | 86% | 35,505 psi | 56% | 2694 fps | 95.4% |
| Alliant Reloder-17 | 55.7 gr | 80% | 32,721 psi | 51% | 2648 fps | 96.1% |
| Alliant Reloder-23 | <<locked>> | 92% | 30,777 psi | 48% | 2589 fps | 95% |
| Alliant Reloder-26 | <<locked>> | 96% | 38,189 psi | 60% | 2841 fps | 95.6% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 44,338 psi | 69% | 2828 fps | 98% |
| Bofors RP3 | <<locked>> | 80% | 37,623 psi | 59% | 2694 fps | 98.3% |
| Bofors RP7 | <<locked>> | 92% | 49,676 psi | 78% | 2887 fps | 95.7% |
| Hodgdon Benchmark | <<locked>> | 80% | 48,704 psi | 76% | 2825 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 44,802 psi | 70% | 2841 fps | 99.8% |
| Hodgdon CFE223 | <<locked>> | 80% | 49,617 psi | 78% | 2992 fps | 99.3% |
| Hodgdon H322 | <<locked>> | 80% | 50,067 psi | 78% | 2877 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 38,450 psi | 60% | 2694 fps | 95.7% |
| Hodgdon H414 | <<locked>> | 88% | 44,469 psi | 70% | 2877 fps | 95.1% |
| Hodgdon H4350 | <<locked>> | 96% | 50,966 psi | 80% | 2953 fps | 95.3% |
| Hodgdon H4895 | <<locked>> | 80% | 45,382 psi | 71% | 2838 fps | 99.3% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 30,690 psi | 48% | 2533 fps | 95.3% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 37,927 psi | 59% | 2736 fps | 98.4% |
| Hodgdon Superformance | <<locked>> | 92% | 46,441 psi | 73% | 2933 fps | 95% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,397 psi | 41% | 1650 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 39,392 psi | 62% | 2703 fps | 98.3% |
| IMR 3031 | <<locked>> | 80% | 41,437 psi | 65% | 2769 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 37,565 psi | 59% | 2644 fps | 96.9% |
| IMR 4166 Enduron | <<locked>> | 86% | 44,846 psi | 70% | 2769 fps | 95.1% |
| IMR 4350 | <<locked>> | 94% | 46,804 psi | 73% | 2854 fps | 95% |
| IMR 4451 Enduron | <<locked>> | 90% | 47,471 psi | 74% | 2854 fps | 95.7% |
| IMR 4831 | <<locked>> | 90% | 35,085 psi | 55% | 2657 fps | 95.3% |
| IMR 4895 | <<locked>> | 80% | 41,669 psi | 65% | 2785 fps | 98.4% |
| IMR 8208 XBR | <<locked>> | 80% | 47,021 psi | 74% | 2835 fps | 99.8% |
| Lovex D073.5 | <<locked>> | 80% | 53,476 psi | 84% | 2927 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 44,353 psi | 70% | 2808 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 45,005 psi | 71% | 2762 fps | 99% |
| Lovex S062 | <<locked>> | 80% | 40,132 psi | 63% | 2710 fps | 99% |
| Lovex S065 | <<locked>> | 86% | 39,813 psi | 62% | 2700 fps | 95.2% |
| Lovex S070 | <<locked>> | 92% | 45,484 psi | 71% | 2835 fps | 95.6% |
| Norma 201 | <<locked>> | 80% | 44,164 psi | 69% | 2779 fps | 99.5% |
| Norma 202 | <<locked>> | 80% | 44,483 psi | 70% | 2789 fps | 100% |
| Norma 203B | <<locked>> | 80% | 40,045 psi | 63% | 2743 fps | 98% |
| Norma 204 | <<locked>> | 98% | 53,577 psi | 84% | 3012 fps | 95.2% |
| Norma URP | <<locked>> | 86% | 35,708 psi | 56% | 2684 fps | 95.2% |
| Ramshot Big Game | <<locked>> | 80% | 39,697 psi | 62% | 2756 fps | 97.8% |
| Ramshot Hunter | <<locked>> | 92% | 42,482 psi | 67% | 2841 fps | 95.5% |
| Ramshot TAC | <<locked>> | 80% | 47,079 psi | 74% | 2838 fps | 97.3% |
| Ramshot Wild Boar | <<locked>> | 80% | 46,659 psi | 73% | 2861 fps | 99.1% |
| Ramshot X-Terminator | <<locked>> | 80% | 50,763 psi | 80% | 2884 fps | 99.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,832 psi | 42% | 1693 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 52,823 psi | 83% | 2923 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 44,237 psi | 69% | 2792 fps | 95.7% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 42,946 psi | 67% | 2864 fps | 98.1% |
| ReloadSwiss RS 60 | 55.7 gr | 80% | 34,838 psi | 55% | 2720 fps | 99.1% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 37,623 psi | 59% | 2756 fps | 95.7% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 40,509 psi | 63% | 2831 fps | 95.9% |
| Rottweil R 901 | <<locked>> | 80% | 48,109 psi | 75% | 2822 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 41,916 psi | 66% | 2726 fps | 99.3% |
| Rottweil R 903 | <<locked>> | 80% | 35,447 psi | 56% | 2635 fps | 97.5% |
| Rottweil R 907 | <<locked>> | 92% | 49,676 psi | 78% | 2887 fps | 95.7% |
| Shooters World Long Rifle | <<locked>> | 86% | 39,813 psi | 62% | 2700 fps | 95.2% |
| Shooters World Match Rifle | <<locked>> | 80% | 44,353 psi | 70% | 2808 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 40,132 psi | 63% | 2710 fps | 99% |
| Shooters World SW4350 | <<locked>> | 92% | 44,222 psi | 69% | 2818 fps | 95.3% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 36,390 psi | 57% | 2684 fps | 96.9% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 45,368 psi | 71% | 2812 fps | 97.5% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 43,598 psi | 68% | 2795 fps | 98.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 45,281 psi | 71% | 2726 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 37,724 psi | 59% | 2589 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 44,657 psi | 70% | 2749 fps | 95.1% |
| Somchem S321 | <<locked>> | 80% | 51,097 psi | 80% | 2920 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 45,078 psi | 71% | 2733 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 45,150 psi | 71% | 2812 fps | 98.9% |
| Somchem S355 | <<locked>> | 80% | 36,245 psi | 57% | 2641 fps | 97.5% |
| Somchem S365 | <<locked>> | 82% | 28,108 psi | 44% | 2513 fps | 95.7% |
| Unknown powder | <<locked>> | 86% | 38,812 psi | 61% | 2746 fps | 95.6% |
| Vihtavuori N130 | <<locked>> | 80% | 50,285 psi | 79% | 2782 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 42,772 psi | 67% | 2677 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 40,118 psi | 63% | 2694 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 41,495 psi | 65% | 2710 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 30,835 psi | 48% | 2487 fps | 97.1% |
| Vihtavuori N160 | <<locked>> | 84% | 36,347 psi | 57% | 2661 fps | 95.4% |
| Vihtavuori N530 | <<locked>> | 80% | 49,574 psi | 78% | 2890 fps | 99.9% |
| Vihtavuori N540 | <<locked>> | 80% | 41,133 psi | 64% | 2730 fps | 100% |
| Vihtavuori N550 | <<locked>> | 84% | 36,883 psi | 58% | 2707 fps | 95.5% |
| Vihtavuori N555 | <<locked>> | 92% | 33,083 psi | 52% | 2671 fps | 95.2% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 30,603 psi | 48% | 2493 fps | 95.4% |
| Winchester 748 | <<locked>> | 80% | 50,720 psi | 79% | 2943 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 44,469 psi | 70% | 2877 fps | 95.1% |
| Winchester StaBALL HD | <<locked>> | 96% | 30,922 psi | 48% | 2667 fps | 95.6% |
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 116 powders for .300 WSM loaded with the .308 | 154gr | Hasler Hunting. ReloadSwiss RS 70 delivers the highest muzzle velocity at 3,156 fps; across all powders the maximum-charge window runs from 1,847 fps to 3,156 fps. Accurate 3100 gives the best case fill at 100 %, and 116 of the 116 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 154.0 gr projectile in 0.308" calls for a 1:12.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, Accurate 4350, ADI AR 2209 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 Power Pro 2000-MR, ReloadSwiss RS 60, Alliant Reloder-17 rank at the top here: for .300 WSM with the .308 | 154gr | Hasler Hunting they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, ADI AR 2209, Alliant Reloder-19, Alliant Reloder-22 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.