Load Specifications
Load data in caliber .300 Weath. Mag. with .308 | 150gr | Hasler Hunting bullet and 93 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-16, ReloadSwiss RS 70 and Alliant Reloder-26.
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 2495 | <<locked>> | 84% | 56,144 psi | 88% | 3035 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 54,592 psi | 86% | 3048 fps | 97.8% |
| Accurate 3100ᴾ | <<locked>> | 100% | 51,982 psi | 81% | 3077 fps | 98.8% |
| Accurate 4064 | <<locked>> | 86% | 56,594 psi | 89% | 3091 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 54,201 psi | 85% | 3143 fps | 99.8% |
| ADI AR 2206H | <<locked>> | 82% | 56,115 psi | 88% | 3127 fps | 100% |
| ADI AR 2208 | <<locked>> | 88% | 57,435 psi | 90% | 3133 fps | 100% |
| ADI AR 2209 | <<locked>> | 98% | 55,782 psi | 87% | 3189 fps | 97.3% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 56,985 psi | 89% | 3264 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 54,505 psi | 85% | 3100 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 54,708 psi | 86% | 3120 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 94% | 55,172 psi | 86% | 3209 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 90% | 56,579 psi | 89% | 3235 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 98% | 54,926 psi | 86% | 3173 fps | 97.3% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 51,982 psi | 81% | 3163 fps | 96.8% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 48,892 psi | 77% | 3100 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 42,641 psi | 67% | 3002 fps | 97.8% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 56,913 psi | 89% | 3314 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 56,318 psi | 88% | 3143 fps | 100% |
| Bofors RP3 | <<locked>> | 86% | 55,187 psi | 86% | 3114 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 51,982 psi | 81% | 3163 fps | 96.8% |
| Bofors RP7 | <<locked>> | 90% | 54,897 psi | 86% | 3094 fps | 98.1% |
| Hodgdon H380 | <<locked>> | 86% | 55,825 psi | 87% | 3133 fps | 99.8% |
| Hodgdon H414 | <<locked>> | 92% | 56,637 psi | 89% | 3199 fps | 98.9% |
| Hodgdon H4350 | <<locked>> | 90% | 56,434 psi | 88% | 3156 fps | 97.8% |
| Hodgdon H4895 | <<locked>> | 82% | 56,739 psi | 89% | 3136 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 55,492 psi | 87% | 3130 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 57,276 psi | 90% | 3176 fps | 100% |
| Hodgdon Superformance | <<locked>> | 92% | 57,551 psi | 90% | 3241 fps | 98.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,129 psi | 57% | 1972 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 54,389 psi | 85% | 3084 fps | 100% |
| IMR 3031 | <<locked>> | 82% | 57,319 psi | 90% | 3114 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 56,797 psi | 89% | 3114 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 84% | 56,072 psi | 88% | 3094 fps | 98.7% |
| IMR 4350 | <<locked>> | 94% | 55,956 psi | 88% | 3127 fps | 98.3% |
| IMR 4451 Enduron | <<locked>> | 90% | 56,782 psi | 89% | 3130 fps | 98.7% |
| IMR 4831 | <<locked>> | 94% | 54,737 psi | 86% | 3133 fps | 99.9% |
| IMR 4895 | <<locked>> | 84% | 56,159 psi | 88% | 3153 fps | 100% |
| Lovex D073.6 | <<locked>> | 82% | 56,376 psi | 88% | 3097 fps | 100% |
| Lovex S060 | <<locked>> | 82% | 55,013 psi | 86% | 3048 fps | 100% |
| Lovex S062 | <<locked>> | 86% | 56,956 psi | 89% | 3107 fps | 100% |
| Lovex S065 | <<locked>> | 92% | 56,449 psi | 88% | 3117 fps | 99.5% |
| Lovex S070 | <<locked>> | 92% | 54,447 psi | 85% | 3104 fps | 98.6% |
| Lovex S071ᴾ | <<locked>> | 100% | 42,946 psi | 67% | 2907 fps | 97% |
| Norma 201 | <<locked>> | 82% | 54,520 psi | 85% | 3061 fps | 100% |
| Norma 202 | <<locked>> | 82% | 55,419 psi | 87% | 3064 fps | 100% |
| Norma 203B | <<locked>> | 86% | 57,740 psi | 90% | 3166 fps | 100% |
| Norma 204 | <<locked>> | 94% | 56,913 psi | 89% | 3182 fps | 97.4% |
| Norma MRPᴾ | <<locked>> | 100% | 55,506 psi | 87% | 3261 fps | 98.7% |
| Norma URP | <<locked>> | 94% | 56,826 psi | 89% | 3189 fps | 99.9% |
| Ramshot Big Game | <<locked>> | 84% | 54,926 psi | 86% | 3133 fps | 100% |
| Ramshot Hunter | <<locked>> | 94% | 55,637 psi | 87% | 3182 fps | 99.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,666 psi | 57% | 2018 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 55,898 psi | 88% | 3114 fps | 99.1% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 55,840 psi | 88% | 3196 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 56,072 psi | 88% | 3232 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 54,259 psi | 85% | 3166 fps | 99.8% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 56,840 psi | 89% | 3258 fps | 99.9% |
| Rottweil R 902 | <<locked>> | 84% | 55,376 psi | 87% | 3068 fps | 100% |
| Rottweil R 903 | <<locked>> | 88% | 55,245 psi | 87% | 3110 fps | 100% |
| Rottweil R 904 | <<locked>> | 98% | 57,493 psi | 90% | 3159 fps | 96.5% |
| Rottweil R 905 | <<locked>> | 98% | 54,041 psi | 85% | 3153 fps | 97.2% |
| Rottweil R 907 | <<locked>> | 90% | 54,897 psi | 86% | 3094 fps | 98.1% |
| Shooters World Long Rifle | <<locked>> | 92% | 56,449 psi | 88% | 3117 fps | 99.5% |
| Shooters World Match Rifle | <<locked>> | 82% | 56,376 psi | 88% | 3097 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 56,956 psi | 89% | 3107 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 54,447 psi | 85% | 3104 fps | 98.6% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 57,392 psi | 90% | 3179 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 57,537 psi | 90% | 3133 fps | 99.8% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 54,665 psi | 86% | 3094 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 55,709 psi | 87% | 2999 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 56,652 psi | 89% | 2999 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 56,333 psi | 88% | 3068 fps | 98.7% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 57,290 psi | 90% | 3212 fps | 97.8% |
| Somchem S335 | <<locked>> | 82% | 55,143 psi | 86% | 2992 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 57,261 psi | 90% | 3117 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 55,245 psi | 87% | 3107 fps | 100% |
| Somchem S365 | <<locked>> | 96% | 55,927 psi | 88% | 3189 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 54,694 psi | 86% | 3130 fps | 98.1% |
| Vihtavuori N133 | <<locked>> | 82% | 56,246 psi | 88% | 2982 fps | 100% |
| Vihtavuori N135 | <<locked>> | 84% | 55,637 psi | 87% | 3025 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 56,159 psi | 88% | 3041 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 56,782 psi | 89% | 3081 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 55,332 psi | 87% | 3127 fps | 99.9% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 50,401 psi | 79% | 3038 fps | 96.9% |
| Vihtavuori N540 | <<locked>> | 84% | 54,288 psi | 85% | 3035 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 54,346 psi | 85% | 3127 fps | 99.7% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 54,723 psi | 86% | 3186 fps | 100% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 55,216 psi | 87% | 3094 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 56,913 psi | 89% | 3205 fps | 98.9% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 44,208 psi | 69% | 3150 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 54,679 psi | 86% | 3097 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 55,100 psi | 86% | 3127 fps | 97.2% |
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 2495 | <<locked>> | 80% | 49,124 psi | 77% | 2927 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 47,732 psi | 75% | 2923 fps | 96.4% |
| Accurate 3100 | <<locked>> | 92% | 39,189 psi | 61% | 2825 fps | 95.9% |
| Accurate 4064 | <<locked>> | 80% | 46,557 psi | 73% | 2930 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 35,331 psi | 55% | 2756 fps | 96.3% |
| ADI AR 2206H | <<locked>> | 80% | 52,634 psi | 82% | 3068 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 44,556 psi | 70% | 2900 fps | 99.1% |
| ADI AR 2209 | <<locked>> | 94% | 48,675 psi | 76% | 3054 fps | 95.7% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 49,226 psi | 77% | 3127 fps | 99.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 44,904 psi | 70% | 2930 fps | 99.9% |
| Alliant Reloder-15 | <<locked>> | 80% | 48,138 psi | 75% | 3002 fps | 99.6% |
| Alliant Reloder-16 | 63.8 gr | 80% | 34,867 psi | 55% | 2772 fps | 96.5% |
| Alliant Reloder-17 | <<locked>> | 80% | 39,566 psi | 62% | 2913 fps | 99.2% |
| Alliant Reloder-19 | <<locked>> | 94% | 48,066 psi | 75% | 3045 fps | 95.7% |
| Alliant Reloder-22 | <<locked>> | 96% | 45,310 psi | 71% | 3031 fps | 95% |
| Alliant Reloder-23 | <<locked>> | 84% | 28,703 psi | 45% | 2608 fps | 95.3% |
| Alliant Reloder-25 | <<locked>> | 96% | 37,333 psi | 59% | 2867 fps | 95.8% |
| Alliant Reloder-26 | 77.4 gr | 88% | 35,940 psi | 56% | 2874 fps | 96.2% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 52,489 psi | 82% | 3077 fps | 99.8% |
| Bofors RP3 | <<locked>> | 80% | 45,049 psi | 71% | 2936 fps | 99.9% |
| Bofors RP5 | <<locked>> | 96% | 45,310 psi | 71% | 3031 fps | 95% |
| Bofors RP7 | <<locked>> | 82% | 42,482 psi | 67% | 2851 fps | 95.2% |
| Hodgdon H380 | <<locked>> | 80% | 45,585 psi | 71% | 2946 fps | 98.6% |
| Hodgdon H414 | <<locked>> | 82% | 40,190 psi | 63% | 2874 fps | 95.1% |
| Hodgdon H4350 | <<locked>> | 84% | 46,470 psi | 73% | 2972 fps | 95.5% |
| Hodgdon H4895 | <<locked>> | 80% | 53,258 psi | 83% | 3081 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 32,184 psi | 50% | 2657 fps | 97.1% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 49,922 psi | 78% | 3058 fps | 100% |
| Hodgdon Superformance | <<locked>> | 84% | 42,496 psi | 67% | 2956 fps | 95.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,948 psi | 42% | 1765 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 50,821 psi | 80% | 3022 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 53,809 psi | 84% | 3064 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 46,847 psi | 73% | 2940 fps | 99.5% |
| IMR 4166 Enduron | <<locked>> | 80% | 49,298 psi | 77% | 2972 fps | 97.5% |
| IMR 4350 | <<locked>> | 86% | 43,294 psi | 68% | 2887 fps | 95.4% |
| IMR 4451 Enduron | <<locked>> | 80% | 41,350 psi | 65% | 2828 fps | 95.3% |
| IMR 4831 | <<locked>> | 80% | 34,026 psi | 53% | 2707 fps | 96% |
| IMR 4895 | <<locked>> | 80% | 49,400 psi | 77% | 3035 fps | 99.9% |
| Lovex D073.6 | <<locked>> | 80% | 52,808 psi | 83% | 3041 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 51,677 psi | 81% | 2992 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 47,021 psi | 74% | 2943 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 38,580 psi | 60% | 2766 fps | 96% |
| Lovex S070 | <<locked>> | 82% | 39,407 psi | 62% | 2802 fps | 95% |
| Lovex S071 | <<locked>> | 96% | 37,565 psi | 59% | 2785 fps | 95.3% |
| Norma 201 | <<locked>> | 80% | 51,155 psi | 80% | 3005 fps | 100% |
| Norma 202 | <<locked>> | 80% | 51,982 psi | 81% | 3012 fps | 100% |
| Norma 203B | <<locked>> | 80% | 47,471 psi | 74% | 2989 fps | 99.8% |
| Norma 204 | <<locked>> | 90% | 49,472 psi | 78% | 3051 fps | 95.8% |
| Norma MRP | <<locked>> | 92% | 41,655 psi | 65% | 2982 fps | 95.4% |
| Norma URP | <<locked>> | 80% | 35,317 psi | 55% | 2756 fps | 96.2% |
| Ramshot Big Game | <<locked>> | 80% | 47,747 psi | 75% | 3005 fps | 99.7% |
| Ramshot Hunter | <<locked>> | 84% | 39,552 psi | 62% | 2864 fps | 95.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,325 psi | 43% | 1808 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 45,745 psi | 72% | 2927 fps | 97.3% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 52,011 psi | 82% | 3130 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 42,148 psi | 66% | 2982 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 35,201 psi | 55% | 2772 fps | 95.9% |
| ReloadSwiss RS 70 | 71.5 gr | 82% | 37,057 psi | 58% | 2844 fps | 96.1% |
| Rottweil R 902 | <<locked>> | 80% | 48,689 psi | 76% | 2956 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 42,221 psi | 66% | 2874 fps | 99.5% |
| Rottweil R 904 | <<locked>> | 96% | 53,650 psi | 84% | 3094 fps | 95.7% |
| Rottweil R 905 | <<locked>> | 94% | 47,021 psi | 74% | 3025 fps | 95.6% |
| Rottweil R 907 | <<locked>> | 82% | 42,482 psi | 67% | 2851 fps | 95.2% |
| Shooters World Long Rifle | <<locked>> | 80% | 38,580 psi | 60% | 2766 fps | 96% |
| Shooters World Match Rifle | <<locked>> | 80% | 52,808 psi | 83% | 3041 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 47,021 psi | 74% | 2943 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 39,407 psi | 62% | 2802 fps | 95% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 43,671 psi | 68% | 2933 fps | 99.3% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 53,534 psi | 84% | 3064 fps | 99.5% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 51,140 psi | 80% | 3035 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 52,199 psi | 82% | 2946 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 43,990 psi | 69% | 2799 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 40,393 psi | 63% | 2766 fps | 95.3% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 46,586 psi | 73% | 3018 fps | 95.4% |
| Somchem S335 | <<locked>> | 80% | 51,822 psi | 81% | 2940 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 53,345 psi | 84% | 3054 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 42,670 psi | 67% | 2877 fps | 99.5% |
| Somchem S365 | <<locked>> | 80% | 31,778 psi | 50% | 2703 fps | 98.3% |
| Somchem S385 | <<locked>> | 92% | 44,599 psi | 70% | 2940 fps | 95.8% |
| Vihtavuori N133 | <<locked>> | 80% | 52,765 psi | 83% | 2930 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 48,921 psi | 77% | 2923 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 49,211 psi | 77% | 2936 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 40,741 psi | 64% | 2802 fps | 99.8% |
| Vihtavuori N160 | <<locked>> | 80% | 36,883 psi | 58% | 2762 fps | 96.7% |
| Vihtavuori N165 | <<locked>> | 96% | 44,077 psi | 69% | 2917 fps | 95.2% |
| Vihtavuori N540 | <<locked>> | 80% | 47,659 psi | 75% | 2927 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 36,289 psi | 57% | 2756 fps | 96.3% |
| Vihtavuori N555 | <<locked>> | 84% | 31,676 psi | 50% | 2694 fps | 95.5% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 36,158 psi | 57% | 2730 fps | 98.7% |
| Winchester 760 | <<locked>> | 82% | 40,364 psi | 63% | 2877 fps | 95.1% |
| Winchester StaBALL HD | <<locked>> | 88% | 29,095 psi | 46% | 2707 fps | 96.4% |
| Winchester StaBALL Match | <<locked>> | 80% | 51,111 psi | 80% | 3041 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 47,558 psi | 75% | 2989 fps | 95.4% |
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 109 powders for .300 Weath. Mag. loaded with the .308 | 150gr | Hasler Hunting. Alliant Reloder-26 delivers the highest muzzle velocity at 3,314 fps; across all powders the maximum-charge window runs from 1,972 fps to 3,314 fps. Accurate 3100 gives the best case fill at 100 %, and 109 of the 109 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 57–90 %, leaving at least 10 % headroom. The 150.0 gr projectile in 0.308" calls for a 1:12.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, Accurate MAGPRO, ADI AR 2213 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-16, ReloadSwiss RS 70, Alliant Reloder-26 rank at the top here: for .300 Weath. Mag. with the .308 | 150gr | Hasler Hunting they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate MAGPRO, Baschieri & Pellagri 109, Hodgdon H1000 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.