Load Specifications
Load data in caliber .300 Weath. Mag. with .308 | 159gr | Hasler Bull bullet and 93 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 70, Alliant Reloder-26 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.
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>> | 82% | 54,810 psi | 86% | 2933 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 56,492 psi | 89% | 3009 fps | 98.6% |
| Accurate 3100ᴾ | <<locked>> | 100% | 54,578 psi | 86% | 3045 fps | 99.5% |
| Accurate 4064 | <<locked>> | 84% | 55,390 psi | 87% | 2989 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 56,739 psi | 89% | 3104 fps | 100% |
| Accurate MAGPROᴾ | <<locked>> | 100% | 57,217 psi | 90% | 3196 fps | 96% |
| ADI AR 2208 | <<locked>> | 86% | 55,796 psi | 87% | 3028 fps | 100% |
| ADI AR 2209 | <<locked>> | 96% | 54,215 psi | 85% | 3091 fps | 97.6% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 55,680 psi | 87% | 3143 fps | 96.7% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 55,361 psi | 87% | 3153 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 56,507 psi | 89% | 3048 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 56,927 psi | 89% | 3074 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 94% | 57,580 psi | 90% | 3166 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 88% | 55,216 psi | 87% | 3130 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 98% | 57,290 psi | 90% | 3140 fps | 98.2% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 54,621 psi | 86% | 3136 fps | 97.9% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 51,372 psi | 81% | 3064 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 44,715 psi | 70% | 2979 fps | 98.8% |
| Alliant Reloder-26 | <<locked>> | 98% | 55,651 psi | 87% | 3212 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 49,835 psi | 78% | 3048 fps | 96.8% |
| Bofors RP3 | <<locked>> | 86% | 57,624 psi | 90% | 3071 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 54,621 psi | 86% | 3136 fps | 97.9% |
| Bofors RP7 | <<locked>> | 90% | 56,869 psi | 89% | 3051 fps | 98.8% |
| Hodgdon H380 | <<locked>> | 84% | 54,114 psi | 85% | 3025 fps | 99.8% |
| Hodgdon H414 | <<locked>> | 90% | 55,390 psi | 87% | 3100 fps | 99.1% |
| Hodgdon H4350 | <<locked>> | 88% | 55,013 psi | 86% | 3058 fps | 98.1% |
| Hodgdon H4831 | <<locked>> | 98% | 55,869 psi | 88% | 3087 fps | 96.1% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 54,215 psi | 85% | 3031 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 55,637 psi | 87% | 3068 fps | 100% |
| Hodgdon Superformance | <<locked>> | 90% | 55,753 psi | 87% | 3140 fps | 98.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,347 psi | 57% | 1923 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 56,188 psi | 88% | 3031 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 55,347 psi | 87% | 3012 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 54,389 psi | 85% | 2989 fps | 98.9% |
| IMR 4350 | <<locked>> | 92% | 54,592 psi | 86% | 3031 fps | 98.6% |
| IMR 4451 Enduron | <<locked>> | 88% | 55,230 psi | 87% | 3028 fps | 98.9% |
| IMR 4831 | <<locked>> | 94% | 57,145 psi | 90% | 3094 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 54,621 psi | 86% | 3048 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 98% | 57,174 psi | 90% | 3071 fps | 96.5% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 53,069 psi | 83% | 3110 fps | 96.2% |
| Lovex S060 | <<locked>> | 82% | 56,695 psi | 89% | 2995 fps | 100% |
| Lovex S062 | <<locked>> | 84% | 55,332 psi | 87% | 3002 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 55,172 psi | 86% | 3022 fps | 99.6% |
| Lovex S070 | <<locked>> | 92% | 56,565 psi | 89% | 3068 fps | 99.3% |
| Lovex S071ᴾ | <<locked>> | 100% | 45,150 psi | 71% | 2881 fps | 98.1% |
| Norma 201 | <<locked>> | 82% | 56,579 psi | 89% | 3015 fps | 100% |
| Norma 202 | <<locked>> | 82% | 57,334 psi | 90% | 3009 fps | 100% |
| Norma 203B | <<locked>> | 84% | 56,202 psi | 88% | 3061 fps | 100% |
| Norma 204 | <<locked>> | 92% | 55,332 psi | 87% | 3081 fps | 97.7% |
| Norma MRP | <<locked>> | 98% | 54,128 psi | 85% | 3163 fps | 99% |
| Norma URP | <<locked>> | 92% | 55,477 psi | 87% | 3087 fps | 100% |
| Ramshot Big Game | <<locked>> | 84% | 57,130 psi | 90% | 3087 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 53,330 psi | 84% | 3123 fps | 96.7% |
| Ramshot Hunter | <<locked>> | 92% | 54,230 psi | 85% | 3084 fps | 99.4% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 47,543 psi | 75% | 2989 fps | 97.1% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,927 psi | 58% | 1965 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 54,186 psi | 85% | 3012 fps | 99.2% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 54,650 psi | 86% | 3127 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 56,869 psi | 89% | 3130 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 55,434 psi | 87% | 3156 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 43,729 psi | 69% | 2999 fps | 97% |
| Rottweil R 902 | <<locked>> | 84% | 57,217 psi | 90% | 3015 fps | 100% |
| Rottweil R 903 | <<locked>> | 88% | 57,508 psi | 90% | 3061 fps | 100% |
| Rottweil R 904 | <<locked>> | 96% | 55,825 psi | 87% | 3058 fps | 96.8% |
| Rottweil R 905 | <<locked>> | 98% | 56,536 psi | 89% | 3123 fps | 98.2% |
| Rottweil R 907 | <<locked>> | 90% | 56,869 psi | 89% | 3051 fps | 98.8% |
| Shooters World Long Rifle | <<locked>> | 90% | 55,172 psi | 86% | 3022 fps | 99.6% |
| Shooters World Precision | <<locked>> | 84% | 55,332 psi | 87% | 3002 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 56,565 psi | 89% | 3068 fps | 99.3% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 55,811 psi | 87% | 3074 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 56,594 psi | 89% | 3045 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 57,392 psi | 90% | 2943 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 55,085 psi | 86% | 2897 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 54,737 psi | 86% | 2972 fps | 98.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 56,057 psi | 88% | 3117 fps | 98.1% |
| Somchem S335 | <<locked>> | 82% | 57,116 psi | 90% | 2940 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 57,566 psi | 90% | 3061 fps | 100% |
| Somchem S365 | <<locked>> | 94% | 54,868 psi | 86% | 3091 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 56,956 psi | 89% | 3094 fps | 98.9% |
| Vihtavuori N135 | <<locked>> | 84% | 57,638 psi | 90% | 2972 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 54,520 psi | 85% | 2940 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 55,216 psi | 87% | 2979 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 57,653 psi | 90% | 3084 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 52,765 psi | 83% | 3009 fps | 97.9% |
| Vihtavuori N540 | <<locked>> | 84% | 56,173 psi | 88% | 2982 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 56,637 psi | 89% | 3087 fps | 100% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 57,508 psi | 90% | 3146 fps | 100% |
| Vihtavuori N560 | <<locked>> | 98% | 54,404 psi | 85% | 3150 fps | 96.1% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 57,624 psi | 90% | 3051 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 55,390 psi | 87% | 3100 fps | 99.1% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 46,818 psi | 73% | 3123 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 56,927 psi | 89% | 3054 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 57,653 psi | 90% | 3094 fps | 98.2% |
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% | 51,256 psi | 80% | 2881 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 49,385 psi | 77% | 2887 fps | 97.4% |
| Accurate 3100 | <<locked>> | 88% | 35,752 psi | 56% | 2677 fps | 95.4% |
| Accurate 4064 | <<locked>> | 80% | 48,631 psi | 76% | 2887 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 37,043 psi | 58% | 2730 fps | 97.5% |
| Accurate MAGPRO | <<locked>> | 98% | 53,272 psi | 83% | 3127 fps | 95.1% |
| ADI AR 2208 | <<locked>> | 80% | 46,253 psi | 72% | 2864 fps | 99.6% |
| ADI AR 2209 | <<locked>> | 90% | 44,440 psi | 70% | 2900 fps | 95.2% |
| ADI AR 2213 | <<locked>> | 98% | 51,822 psi | 81% | 3074 fps | 95.8% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 51,547 psi | 81% | 3091 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 46,615 psi | 73% | 2887 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 49,922 psi | 78% | 2959 fps | 99.9% |
| Alliant Reloder-16 | <<locked>> | 80% | 36,303 psi | 57% | 2746 fps | 97.7% |
| Alliant Reloder-17 | 68.4 gr | 80% | 41,394 psi | 65% | 2881 fps | 99.8% |
| Alliant Reloder-19 | <<locked>> | 90% | 44,034 psi | 69% | 2890 fps | 95.2% |
| Alliant Reloder-22 | <<locked>> | 94% | 44,280 psi | 69% | 2940 fps | 95.4% |
| Alliant Reloder-23 | <<locked>> | 82% | 28,195 psi | 44% | 2530 fps | 95.8% |
| Alliant Reloder-25 | <<locked>> | 92% | 34,345 psi | 54% | 2723 fps | 95.3% |
| Alliant Reloder-26 | 73.6 gr | 84% | 32,634 psi | 51% | 2713 fps | 95.4% |
| Bofors RP15 | <<locked>> | 96% | 43,656 psi | 68% | 2923 fps | 95% |
| Bofors RP3 | <<locked>> | 80% | 46,905 psi | 74% | 2897 fps | 100% |
| Bofors RP5 | <<locked>> | 94% | 44,280 psi | 69% | 2940 fps | 95.4% |
| Bofors RP7 | <<locked>> | 80% | 41,249 psi | 65% | 2756 fps | 95.5% |
| Hodgdon H380 | <<locked>> | 80% | 47,355 psi | 74% | 2907 fps | 99.2% |
| Hodgdon H414 | <<locked>> | 80% | 39,247 psi | 62% | 2782 fps | 95.5% |
| Hodgdon H4350 | <<locked>> | 80% | 42,250 psi | 66% | 2812 fps | 95% |
| Hodgdon H4831 | <<locked>> | 96% | 52,040 psi | 82% | 3022 fps | 95.2% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 33,808 psi | 53% | 2635 fps | 98.3% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 51,924 psi | 81% | 3012 fps | 100% |
| Hodgdon Superformance | <<locked>> | 82% | 41,263 psi | 65% | 2861 fps | 95.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,093 psi | 42% | 1719 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 52,736 psi | 83% | 2976 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 48,660 psi | 76% | 2900 fps | 99.9% |
| IMR 4166 Enduron | <<locked>> | 80% | 50,879 psi | 80% | 2930 fps | 98.3% |
| IMR 4350 | <<locked>> | 84% | 42,192 psi | 66% | 2795 fps | 95.8% |
| IMR 4451 Enduron | <<locked>> | 80% | 42,772 psi | 67% | 2792 fps | 96.5% |
| IMR 4831 | <<locked>> | 80% | 35,752 psi | 56% | 2684 fps | 97.3% |
| IMR 4895 | <<locked>> | 80% | 51,213 psi | 80% | 2989 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 50,430 psi | 79% | 2953 fps | 95% |
| IMR 7828 SSC | <<locked>> | 98% | 49,414 psi | 77% | 3041 fps | 95.2% |
| Lovex S060 | <<locked>> | 80% | 53,243 psi | 83% | 2943 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 48,704 psi | 76% | 2894 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 40,147 psi | 63% | 2736 fps | 97.2% |
| Lovex S070 | <<locked>> | 80% | 38,363 psi | 60% | 2710 fps | 95.4% |
| Lovex S071 | <<locked>> | 94% | 36,840 psi | 58% | 2703 fps | 95.8% |
| Norma 201 | <<locked>> | 80% | 53,084 psi | 83% | 2963 fps | 100% |
| Norma 202 | <<locked>> | 80% | 53,766 psi | 84% | 2956 fps | 100% |
| Norma 203B | <<locked>> | 80% | 49,255 psi | 77% | 2946 fps | 100% |
| Norma 204 | <<locked>> | 86% | 45,020 psi | 71% | 2894 fps | 95.2% |
| Norma MRP | <<locked>> | 90% | 40,582 psi | 64% | 2887 fps | 95.8% |
| Norma URP | <<locked>> | 80% | 37,057 psi | 58% | 2730 fps | 97.4% |
| Ramshot Big Game | <<locked>> | 80% | 49,893 psi | 78% | 2969 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 49,501 psi | 78% | 3054 fps | 95.6% |
| Ramshot Hunter | <<locked>> | 80% | 35,911 psi | 56% | 2710 fps | 95.2% |
| Ramshot Magnum | <<locked>> | 96% | 40,973 psi | 64% | 2848 fps | 95.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,514 psi | 43% | 1759 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 47,413 psi | 74% | 2890 fps | 98.2% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 44,019 psi | 69% | 2943 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 36,970 psi | 58% | 2746 fps | 97.2% |
| ReloadSwiss RS 70 | 69.5 gr | 80% | 36,071 psi | 57% | 2756 fps | 96.5% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 40,567 psi | 64% | 2920 fps | 95.8% |
| Rottweil R 902 | <<locked>> | 80% | 50,560 psi | 79% | 2910 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 44,121 psi | 69% | 2838 fps | 99.9% |
| Rottweil R 904 | <<locked>> | 92% | 49,037 psi | 77% | 2940 fps | 95.2% |
| Rottweil R 905 | <<locked>> | 90% | 42,975 psi | 67% | 2871 fps | 95% |
| Rottweil R 907 | <<locked>> | 80% | 41,249 psi | 65% | 2756 fps | 95.5% |
| Shooters World Long Rifle | <<locked>> | 80% | 40,147 psi | 63% | 2736 fps | 97.2% |
| Shooters World Precision | <<locked>> | 80% | 48,704 psi | 76% | 2894 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 38,363 psi | 60% | 2710 fps | 95.4% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 45,469 psi | 71% | 2894 fps | 99.8% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 52,953 psi | 83% | 2989 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 53,998 psi | 85% | 2894 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 45,629 psi | 72% | 2749 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 39,218 psi | 61% | 2674 fps | 95.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 45,600 psi | 71% | 2927 fps | 95.8% |
| Somchem S335 | <<locked>> | 80% | 53,679 psi | 84% | 2890 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 44,498 psi | 70% | 2838 fps | 99.9% |
| Somchem S365 | <<locked>> | 80% | 33,373 psi | 52% | 2677 fps | 99.2% |
| Somchem S385 | <<locked>> | 88% | 40,756 psi | 64% | 2789 fps | 95.3% |
| Vihtavuori N135 | <<locked>> | 80% | 50,937 psi | 80% | 2874 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 51,155 psi | 80% | 2887 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 42,525 psi | 67% | 2766 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 38,464 psi | 60% | 2733 fps | 97.8% |
| Vihtavuori N165 | <<locked>> | 94% | 42,989 psi | 67% | 2828 fps | 95.6% |
| Vihtavuori N540 | <<locked>> | 80% | 49,371 psi | 77% | 2877 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 37,869 psi | 59% | 2730 fps | 97.5% |
| Vihtavuori N555 | <<locked>> | 82% | 31,111 psi | 49% | 2612 fps | 96% |
| Vihtavuori N560 | <<locked>> | 96% | 50,691 psi | 79% | 3081 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 37,782 psi | 59% | 2703 fps | 99.4% |
| Winchester 760 | <<locked>> | 80% | 39,421 psi | 62% | 2789 fps | 95.5% |
| Winchester StaBALL HD | <<locked>> | 84% | 26,556 psi | 42% | 2552 fps | 95.5% |
| Winchester StaBALL Match | <<locked>> | 80% | 53,011 psi | 83% | 2992 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 46,485 psi | 73% | 2904 fps | 95.9% |
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 93 powders for .300 Weath. Mag. loaded with the .308 | 159gr | Hasler Bull. Alliant Reloder-26 delivers the highest muzzle velocity at 3,212 fps; across all powders the maximum-charge window runs from 1,923 fps to 3,212 fps. Accurate 3100 gives the best case fill at 100 %, and 93 of the 93 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 159.0 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. ReloadSwiss RS 70, Alliant Reloder-26, Alliant Reloder-17 rank at the top here: for .300 Weath. Mag. with the .308 | 159gr | Hasler Bull 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.