Load Specifications
Load data in caliber .300 Weath. Mag. with .308 | 167gr | MRR Green Hunting bullet and 90 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-26, Norma MRP and ReloadSwiss RS 70.
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 2495 | <<locked>> | 82% | 56,289 psi | 88% | 2881 fps | 100% |
| Accurate 2700 | <<locked>> | 82% | 54,172 psi | 85% | 2907 fps | 98.6% |
| Accurate 3100ᴾ | <<locked>> | 100% | 56,304 psi | 88% | 3005 fps | 99.8% |
| Accurate 4064 | <<locked>> | 84% | 56,666 psi | 89% | 2936 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 54,346 psi | 85% | 2999 fps | 100% |
| Accurate MAGPRO | <<locked>> | 98% | 55,027 psi | 86% | 3094 fps | 96.1% |
| ADI AR 2208 | <<locked>> | 86% | 57,116 psi | 90% | 2979 fps | 100% |
| ADI AR 2209 | <<locked>> | 96% | 55,796 psi | 87% | 3051 fps | 98.3% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 57,232 psi | 90% | 3107 fps | 97.5% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 56,942 psi | 89% | 3107 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 96% | 55,869 psi | 88% | 3048 fps | 98.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 54,404 psi | 85% | 2949 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 54,578 psi | 86% | 2969 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 92% | 55,434 psi | 87% | 3061 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 88% | 56,898 psi | 89% | 3084 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 96% | 55,114 psi | 86% | 3035 fps | 98.2% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 56,289 psi | 88% | 3097 fps | 98.6% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 53,258 psi | 83% | 3022 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 46,035 psi | 72% | 2946 fps | 99.4% |
| Alliant Reloder-26 | <<locked>> | 98% | 57,566 psi | 90% | 3173 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 51,387 psi | 81% | 3012 fps | 97.6% |
| Bofors RP3 | <<locked>> | 84% | 55,071 psi | 86% | 2963 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 56,289 psi | 88% | 3097 fps | 98.6% |
| Bofors RP7 | <<locked>> | 88% | 54,563 psi | 86% | 2949 fps | 98.8% |
| Hodgdon H380 | <<locked>> | 84% | 55,637 psi | 87% | 2982 fps | 100% |
| Hodgdon H414 | <<locked>> | 90% | 56,710 psi | 89% | 3058 fps | 99.5% |
| Hodgdon H4350 | <<locked>> | 88% | 56,376 psi | 88% | 3015 fps | 98.6% |
| Hodgdon H4831 | <<locked>> | 98% | 57,377 psi | 90% | 3048 fps | 96.9% |
| Hodgdon H4831 SC | <<locked>> | 98% | 56,202 psi | 88% | 3028 fps | 96.6% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 55,796 psi | 87% | 2982 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 56,956 psi | 89% | 3015 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 44,918 psi | 70% | 2976 fps | 96.9% |
| Hodgdon Superformance | <<locked>> | 90% | 57,406 psi | 90% | 3097 fps | 99.4% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,477 psi | 57% | 1873 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 57,537 psi | 90% | 2982 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 56,463 psi | 88% | 2959 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 55,434 psi | 87% | 2943 fps | 99.3% |
| IMR 4350 | <<locked>> | 92% | 55,970 psi | 88% | 2989 fps | 99% |
| IMR 4451 Enduron | <<locked>> | 88% | 56,391 psi | 88% | 2982 fps | 99.3% |
| IMR 4831 | <<locked>> | 92% | 55,056 psi | 86% | 2992 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 56,014 psi | 88% | 2999 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 55,129 psi | 86% | 2976 fps | 96.6% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 54,621 psi | 86% | 3074 fps | 97.1% |
| Lovex S062 | <<locked>> | 84% | 56,681 psi | 89% | 2949 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 56,463 psi | 88% | 2976 fps | 99.9% |
| Lovex S070 | <<locked>> | 90% | 54,389 psi | 85% | 2966 fps | 99.3% |
| Lovex S071ᴾ | <<locked>> | 100% | 46,514 psi | 73% | 2844 fps | 98.7% |
| Norma 203B | <<locked>> | 84% | 57,435 psi | 90% | 3009 fps | 100% |
| Norma 204 | <<locked>> | 92% | 56,898 psi | 89% | 3041 fps | 98.3% |
| Norma MRP | <<locked>> | 98% | 55,941 psi | 88% | 3120 fps | 99.4% |
| Norma URP | <<locked>> | 92% | 57,029 psi | 89% | 3041 fps | 100% |
| Ramshot Big Game | <<locked>> | 82% | 54,781 psi | 86% | 2982 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 55,042 psi | 86% | 3094 fps | 97.5% |
| Ramshot Hunter | <<locked>> | 92% | 55,854 psi | 88% | 3041 fps | 99.7% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 49,182 psi | 77% | 2959 fps | 98% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,101 psi | 58% | 1916 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 55,463 psi | 87% | 2966 fps | 99.6% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 56,333 psi | 88% | 3074 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 54,476 psi | 85% | 3022 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 57,000 psi | 89% | 3117 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 45,020 psi | 71% | 2969 fps | 98% |
| Rottweil R 902 | <<locked>> | 82% | 54,955 psi | 86% | 2910 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 55,376 psi | 87% | 2959 fps | 100% |
| Rottweil R 904 | <<locked>> | 96% | 57,319 psi | 90% | 3022 fps | 97.6% |
| Rottweil R 905 | <<locked>> | 96% | 54,288 psi | 85% | 3022 fps | 98.2% |
| Rottweil R 907 | <<locked>> | 88% | 54,563 psi | 86% | 2949 fps | 98.8% |
| Shooters World Long Rifle | <<locked>> | 90% | 56,463 psi | 88% | 2976 fps | 99.9% |
| Shooters World Precision | <<locked>> | 84% | 56,681 psi | 89% | 2949 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 54,389 psi | 85% | 2966 fps | 99.3% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 57,217 psi | 90% | 3022 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 56,333 psi | 88% | 2844 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 56,043 psi | 88% | 2927 fps | 99.3% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 57,595 psi | 90% | 3077 fps | 98.7% |
| Somchem S355 | <<locked>> | 86% | 55,216 psi | 87% | 2956 fps | 100% |
| Somchem S361 | <<locked>> | 94% | 55,405 psi | 87% | 2953 fps | 96.4% |
| Somchem S365 | <<locked>> | 94% | 56,695 psi | 89% | 3045 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 54,795 psi | 86% | 2995 fps | 98.9% |
| Vihtavuori N135 | <<locked>> | 82% | 55,477 psi | 87% | 2871 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 55,825 psi | 87% | 2887 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 56,782 psi | 89% | 2930 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 55,274 psi | 87% | 2979 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 54,259 psi | 85% | 2969 fps | 98.5% |
| Vihtavuori N540 | <<locked>> | 84% | 57,595 psi | 90% | 2933 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 54,404 psi | 85% | 2982 fps | 100% |
| Vihtavuori N555 | <<locked>> | 98% | 55,593 psi | 87% | 3048 fps | 100% |
| Vihtavuori N560 | <<locked>> | 98% | 56,101 psi | 88% | 3114 fps | 97% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 55,201 psi | 87% | 2946 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 56,942 psi | 89% | 3061 fps | 99.5% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 48,733 psi | 76% | 3087 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 55,129 psi | 86% | 2992 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% | 52,591 psi | 82% | 2828 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 50,618 psi | 79% | 2844 fps | 98.1% |
| Accurate 3100 | <<locked>> | 86% | 34,447 psi | 54% | 2589 fps | 95.4% |
| Accurate 4064 | <<locked>> | 80% | 49,922 psi | 78% | 2838 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 38,276 psi | 60% | 2697 fps | 98.3% |
| Accurate MAGPRO | <<locked>> | 96% | 51,169 psi | 80% | 3025 fps | 95.1% |
| ADI AR 2208 | <<locked>> | 80% | 47,311 psi | 74% | 2815 fps | 99.9% |
| ADI AR 2209 | <<locked>> | 88% | 42,685 psi | 67% | 2805 fps | 95.2% |
| ADI AR 2213 | <<locked>> | 96% | 49,763 psi | 78% | 2972 fps | 95.8% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 52,953 psi | 83% | 3045 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 88% | 42,728 psi | 67% | 2799 fps | 95.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 47,790 psi | 75% | 2838 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 51,155 psi | 80% | 2913 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 37,333 psi | 59% | 2710 fps | 98.4% |
| Alliant Reloder-17 | <<locked>> | 80% | 42,540 psi | 67% | 2841 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 42,235 psi | 66% | 2792 fps | 95.2% |
| Alliant Reloder-22 | <<locked>> | 92% | 42,757 psi | 67% | 2848 fps | 95.5% |
| Alliant Reloder-23 | <<locked>> | 80% | 27,166 psi | 43% | 2444 fps | 95.9% |
| Alliant Reloder-25 | <<locked>> | 90% | 33,141 psi | 52% | 2635 fps | 95.4% |
| Alliant Reloder-26 | 71.1 gr | 82% | 31,401 psi | 49% | 2621 fps | 95.4% |
| Bofors RP15 | <<locked>> | 94% | 41,989 psi | 66% | 2828 fps | 95.1% |
| Bofors RP3 | <<locked>> | 80% | 48,225 psi | 76% | 2851 fps | 100% |
| Bofors RP5 | <<locked>> | 92% | 42,757 psi | 67% | 2848 fps | 95.5% |
| Bofors RP7 | <<locked>> | 80% | 42,264 psi | 66% | 2720 fps | 96.4% |
| Hodgdon H380 | <<locked>> | 80% | 48,588 psi | 76% | 2864 fps | 99.6% |
| Hodgdon H414 | <<locked>> | 80% | 40,466 psi | 63% | 2749 fps | 96.4% |
| Hodgdon H4350 | <<locked>> | 80% | 43,352 psi | 68% | 2776 fps | 95.9% |
| Hodgdon H4831 | <<locked>> | 94% | 49,908 psi | 78% | 2920 fps | 95.2% |
| Hodgdon H4831 SC | <<locked>> | 96% | 52,286 psi | 82% | 2963 fps | 95.8% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 34,867 psi | 55% | 2598 fps | 98.9% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 53,403 psi | 84% | 2963 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 98% | 42,047 psi | 66% | 2907 fps | 95.8% |
| Hodgdon Superformance | <<locked>> | 80% | 39,436 psi | 62% | 2756 fps | 95.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,108 psi | 42% | 1673 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 53,969 psi | 85% | 2927 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 49,777 psi | 78% | 2851 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 52,011 psi | 82% | 2884 fps | 98.8% |
| IMR 4350 | <<locked>> | 82% | 40,466 psi | 63% | 2700 fps | 95.8% |
| IMR 4451 Enduron | <<locked>> | 80% | 43,772 psi | 69% | 2753 fps | 97.2% |
| IMR 4831 | <<locked>> | 80% | 36,854 psi | 58% | 2648 fps | 98% |
| IMR 4895 | <<locked>> | 80% | 52,504 psi | 82% | 2943 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 48,515 psi | 76% | 2858 fps | 95% |
| IMR 7828 SSC | <<locked>> | 96% | 47,485 psi | 74% | 2943 fps | 95.3% |
| Lovex S062 | <<locked>> | 80% | 49,850 psi | 78% | 2848 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 41,176 psi | 65% | 2697 fps | 97.9% |
| Lovex S070 | <<locked>> | 80% | 39,392 psi | 62% | 2674 fps | 96.3% |
| Lovex S071 | <<locked>> | 90% | 33,373 psi | 52% | 2559 fps | 95% |
| Norma 203B | <<locked>> | 80% | 50,517 psi | 79% | 2900 fps | 100% |
| Norma 204 | <<locked>> | 84% | 43,062 psi | 67% | 2789 fps | 95.2% |
| Norma MRP | 74 gr | 88% | 39,030 psi | 61% | 2792 fps | 95.8% |
| Norma URP | <<locked>> | 80% | 38,174 psi | 60% | 2694 fps | 98.2% |
| Ramshot Big Game | <<locked>> | 80% | 51,155 psi | 80% | 2923 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 47,558 psi | 75% | 2956 fps | 95.7% |
| Ramshot Hunter | <<locked>> | 80% | 37,043 psi | 58% | 2677 fps | 96.2% |
| Ramshot Magnum | <<locked>> | 94% | 39,233 psi | 61% | 2753 fps | 95% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,731 psi | 43% | 1716 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 48,660 psi | 76% | 2851 fps | 98.8% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 45,237 psi | 71% | 2897 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 38,247 psi | 60% | 2717 fps | 98% |
| ReloadSwiss RS 70 | 68.7 gr | 80% | 37,057 psi | 58% | 2723 fps | 97.4% |
| ReloadSwiss RS 76 | <<locked>> | 96% | 39,001 psi | 61% | 2825 fps | 95.8% |
| Rottweil R 902 | <<locked>> | 80% | 51,692 psi | 81% | 2861 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 45,339 psi | 71% | 2795 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 47,123 psi | 74% | 2841 fps | 95.3% |
| Rottweil R 905 | <<locked>> | 88% | 41,350 psi | 65% | 2772 fps | 95.1% |
| Rottweil R 907 | <<locked>> | 80% | 42,264 psi | 66% | 2720 fps | 96.4% |
| Shooters World Long Rifle | <<locked>> | 80% | 41,176 psi | 65% | 2697 fps | 97.9% |
| Shooters World Precision | <<locked>> | 80% | 49,850 psi | 78% | 2848 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 39,392 psi | 62% | 2674 fps | 96.3% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 46,760 psi | 73% | 2854 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 46,630 psi | 73% | 2700 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 40,248 psi | 63% | 2638 fps | 96.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 43,903 psi | 69% | 2831 fps | 95.9% |
| Somchem S355 | <<locked>> | 80% | 45,629 psi | 72% | 2795 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 51,793 psi | 81% | 2890 fps | 95.6% |
| Somchem S365 | <<locked>> | 80% | 34,534 psi | 54% | 2644 fps | 99.6% |
| Somchem S385 | <<locked>> | 86% | 39,247 psi | 62% | 2697 fps | 95.3% |
| Vihtavuori N135 | <<locked>> | 80% | 52,127 psi | 82% | 2822 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 52,373 psi | 82% | 2835 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 43,613 psi | 68% | 2723 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 39,595 psi | 62% | 2697 fps | 98.5% |
| Vihtavuori N165 | <<locked>> | 92% | 41,481 psi | 65% | 2736 fps | 95.7% |
| Vihtavuori N540 | <<locked>> | 80% | 50,604 psi | 79% | 2828 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 39,015 psi | 61% | 2694 fps | 98.2% |
| Vihtavuori N555 | <<locked>> | 80% | 30,008 psi | 47% | 2520 fps | 96% |
| Vihtavuori N560 | <<locked>> | 94% | 48,863 psi | 77% | 2982 fps | 95.2% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 38,740 psi | 61% | 2664 fps | 99.7% |
| Winchester 760 | <<locked>> | 80% | 40,466 psi | 63% | 2749 fps | 96.4% |
| Winchester StaBALL HD | <<locked>> | 82% | 25,628 psi | 40% | 2470 fps | 95.6% |
| Winchester Supreme 780 | <<locked>> | 92% | 44,570 psi | 70% | 2805 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 90 powders for .300 Weath. Mag. loaded with the .308 | 167gr | MRR Green Hunting. Alliant Reloder-26 delivers the highest muzzle velocity at 3,173 fps; across all powders the maximum-charge window runs from 1,873 fps to 3,173 fps. Accurate 3100 gives the best case fill at 100 %, and 90 of the 90 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 167.0 gr projectile in 0.308" calls for a 1:12.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, ADI AR 2213, Alliant Reloder-22 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-26, Norma MRP, ReloadSwiss RS 70 rank at the top here: for .300 Weath. Mag. with the .308 | 167gr | 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.