Load Specifications
Load data in caliber .300 Weath. Mag. with .308 | 165gr | Nosler Solid Base bullet and 85 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Norma MRP, Vihtavuori N560 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.
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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 2700 | <<locked>> | 82% | 55,521 psi | 87% | 2943 fps | 98.8% |
| Accurate 3100 | <<locked>> | 98% | 54,578 psi | 86% | 2992 fps | 99.7% |
| Accurate 4064 | <<locked>> | 82% | 55,201 psi | 87% | 2930 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 56,347 psi | 88% | 3045 fps | 100% |
| Accurate MAGPRO | <<locked>> | 98% | 56,782 psi | 89% | 3136 fps | 96.4% |
| ADI AR 2208 | <<locked>> | 84% | 54,940 psi | 86% | 2959 fps | 100% |
| ADI AR 2209 | <<locked>> | 96% | 57,246 psi | 90% | 3091 fps | 98.5% |
| ADI AR 2213 | <<locked>> | 98% | 54,781 psi | 86% | 3077 fps | 97% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 55,970 psi | 88% | 2986 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 56,086 psi | 88% | 3009 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 92% | 57,014 psi | 89% | 3100 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 86% | 54,650 psi | 86% | 3068 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 96% | 56,550 psi | 89% | 3074 fps | 98.4% |
| Alliant Reloder-22 | <<locked>> | 98% | 54,143 psi | 85% | 3077 fps | 98.2% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 54,868 psi | 86% | 3061 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 47,674 psi | 75% | 2992 fps | 99.6% |
| Alliant Reloder-26 | <<locked>> | 96% | 55,245 psi | 87% | 3153 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 53,113 psi | 83% | 3058 fps | 97.9% |
| Bofors RP3 | <<locked>> | 84% | 57,014 psi | 89% | 3005 fps | 100% |
| Bofors RP5 | <<locked>> | 98% | 54,143 psi | 85% | 3077 fps | 98.2% |
| Bofors RP7 | <<locked>> | 88% | 55,970 psi | 88% | 2989 fps | 99% |
| Hodgdon H380 | <<locked>> | 84% | 57,130 psi | 90% | 3018 fps | 100% |
| Hodgdon H414 | <<locked>> | 88% | 54,752 psi | 86% | 3038 fps | 99.2% |
| Hodgdon H4350 | <<locked>> | 86% | 54,172 psi | 85% | 2992 fps | 98.3% |
| Hodgdon H4831 | <<locked>> | 96% | 55,013 psi | 86% | 3025 fps | 96.3% |
| Hodgdon H4831 SC | <<locked>> | 98% | 57,595 psi | 90% | 3064 fps | 96.9% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 57,450 psi | 90% | 3022 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 46,499 psi | 73% | 3025 fps | 97.3% |
| Hodgdon Superformance | <<locked>> | 88% | 54,926 psi | 86% | 3074 fps | 99.1% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,680 psi | 57% | 1893 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 54,360 psi | 85% | 2943 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 56,681 psi | 89% | 2979 fps | 99.4% |
| IMR 4350 | <<locked>> | 92% | 57,159 psi | 90% | 3022 fps | 99.2% |
| IMR 4451 Enduron | <<locked>> | 88% | 57,595 psi | 90% | 3015 fps | 99.4% |
| IMR 4831 | <<locked>> | 92% | 56,768 psi | 89% | 3035 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 57,566 psi | 90% | 3035 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 56,405 psi | 88% | 3012 fps | 96.8% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 56,231 psi | 88% | 3117 fps | 97.4% |
| Lovex S062 | <<locked>> | 82% | 54,563 psi | 86% | 2936 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 54,462 psi | 85% | 2959 fps | 99.7% |
| Lovex S070 | <<locked>> | 90% | 55,883 psi | 88% | 3002 fps | 99.4% |
| Lovex S071ᴾ | <<locked>> | 100% | 48,399 psi | 76% | 2890 fps | 99% |
| Norma 203B | <<locked>> | 82% | 55,448 psi | 87% | 2992 fps | 100% |
| Norma 204 | <<locked>> | 90% | 54,505 psi | 85% | 3018 fps | 97.9% |
| Norma MRP | <<locked>> | 98% | 57,740 psi | 90% | 3166 fps | 99.6% |
| Norma URP | <<locked>> | 90% | 54,853 psi | 86% | 3025 fps | 100% |
| Ramshot Big Game | <<locked>> | 82% | 56,188 psi | 88% | 3018 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 56,710 psi | 89% | 3136 fps | 97.8% |
| Ramshot Hunter | <<locked>> | 92% | 57,363 psi | 90% | 3084 fps | 99.8% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 50,850 psi | 80% | 3002 fps | 98.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,347 psi | 59% | 1936 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 56,985 psi | 89% | 3005 fps | 99.7% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 54,070 psi | 85% | 3058 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 56,231 psi | 88% | 3064 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 54,592 psi | 86% | 3091 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 46,746 psi | 73% | 3022 fps | 98.4% |
| Rottweil R 902 | <<locked>> | 82% | 56,637 psi | 89% | 2949 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 57,101 psi | 89% | 2999 fps | 100% |
| Rottweil R 904 | <<locked>> | 94% | 55,143 psi | 86% | 2999 fps | 97.1% |
| Rottweil R 905 | <<locked>> | 96% | 55,898 psi | 88% | 3061 fps | 98.4% |
| Rottweil R 907 | <<locked>> | 88% | 55,970 psi | 88% | 2989 fps | 99% |
| Shooters World Long Rifle | <<locked>> | 88% | 54,462 psi | 85% | 2959 fps | 99.7% |
| Shooters World Precision | <<locked>> | 82% | 54,563 psi | 86% | 2936 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 55,883 psi | 88% | 3002 fps | 99.4% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 54,882 psi | 86% | 3005 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 57,493 psi | 90% | 2874 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 57,609 psi | 90% | 2966 fps | 99.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 55,434 psi | 87% | 3058 fps | 98.4% |
| Somchem S355 | <<locked>> | 86% | 56,797 psi | 89% | 2992 fps | 100% |
| Somchem S361 | <<locked>> | 94% | 56,942 psi | 89% | 2992 fps | 96.7% |
| Somchem S365 | <<locked>> | 92% | 54,491 psi | 85% | 3028 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 56,623 psi | 89% | 3038 fps | 99.1% |
| Vihtavuori N135 | <<locked>> | 82% | 56,985 psi | 89% | 2904 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 57,058 psi | 89% | 2917 fps | 100% |
| Vihtavuori N150 | <<locked>> | 86% | 54,665 psi | 86% | 2917 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 56,884 psi | 89% | 3018 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 55,970 psi | 88% | 3012 fps | 98.8% |
| Vihtavuori N540 | <<locked>> | 82% | 55,332 psi | 87% | 2913 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 56,028 psi | 88% | 3022 fps | 100% |
| Vihtavuori N555 | <<locked>> | 98% | 57,479 psi | 90% | 3094 fps | 100% |
| Vihtavuori N560 | <<locked>> | 96% | 53,911 psi | 84% | 3087 fps | 96.4% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 56,579 psi | 89% | 2982 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 54,752 psi | 86% | 3038 fps | 99.2% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 50,995 psi | 80% | 3136 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 56,782 psi | 89% | 3031 fps | 98.4% |
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 2700 | <<locked>> | 80% | 52,011 psi | 82% | 2884 fps | 98.3% |
| Accurate 3100 | <<locked>> | 84% | 33,794 psi | 53% | 2579 fps | 95.1% |
| Accurate 4064 | <<locked>> | 80% | 51,808 psi | 81% | 2877 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 39,914 psi | 63% | 2743 fps | 98.6% |
| Accurate MAGPRO | <<locked>> | 96% | 52,910 psi | 83% | 3071 fps | 95.5% |
| ADI AR 2208 | <<locked>> | 80% | 48,501 psi | 76% | 2851 fps | 99.9% |
| ADI AR 2209 | <<locked>> | 88% | 43,947 psi | 69% | 2844 fps | 95.5% |
| ADI AR 2213 | <<locked>> | 94% | 47,892 psi | 75% | 2949 fps | 95.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 49,356 psi | 77% | 2881 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 52,504 psi | 82% | 2949 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 38,551 psi | 60% | 2753 fps | 98.7% |
| Alliant Reloder-17 | <<locked>> | 80% | 44,019 psi | 69% | 2881 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 43,714 psi | 69% | 2838 fps | 95.6% |
| Alliant Reloder-22 | <<locked>> | 90% | 41,350 psi | 65% | 2828 fps | 95% |
| Alliant Reloder-23 | <<locked>> | 80% | 28,471 psi | 45% | 2493 fps | 96.5% |
| Alliant Reloder-25 | <<locked>> | 90% | 34,418 psi | 54% | 2680 fps | 96% |
| Alliant Reloder-26 | 72.1 gr | 82% | 32,866 psi | 52% | 2677 fps | 96.1% |
| Bofors RP15 | <<locked>> | 94% | 43,714 psi | 69% | 2877 fps | 95.6% |
| Bofors RP3 | <<locked>> | 80% | 49,763 psi | 78% | 2890 fps | 100% |
| Bofors RP5 | <<locked>> | 90% | 41,350 psi | 65% | 2828 fps | 95% |
| Bofors RP7 | <<locked>> | 80% | 43,584 psi | 68% | 2756 fps | 96.7% |
| Hodgdon H380 | <<locked>> | 80% | 50,183 psi | 79% | 2904 fps | 99.7% |
| Hodgdon H414 | <<locked>> | 80% | 41,742 psi | 65% | 2789 fps | 96.7% |
| Hodgdon H4350 | <<locked>> | 80% | 44,541 psi | 70% | 2812 fps | 96.2% |
| Hodgdon H4831 | <<locked>> | 94% | 51,314 psi | 80% | 2959 fps | 95.5% |
| Hodgdon H4831 SC | <<locked>> | 94% | 50,270 psi | 79% | 2943 fps | 95.2% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 36,230 psi | 57% | 2641 fps | 99.1% |
| Hodgdon Retumbo | <<locked>> | 96% | 40,930 psi | 64% | 2894 fps | 95.2% |
| Hodgdon Superformance | <<locked>> | 80% | 40,727 psi | 64% | 2799 fps | 96.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,296 psi | 43% | 1690 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 51,024 psi | 80% | 2887 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 53,330 psi | 84% | 2920 fps | 99% |
| IMR 4350 | <<locked>> | 80% | 39,233 psi | 61% | 2680 fps | 95.3% |
| IMR 4451 Enduron | <<locked>> | 80% | 45,063 psi | 71% | 2792 fps | 97.5% |
| IMR 4831 | <<locked>> | 80% | 38,247 psi | 60% | 2694 fps | 98.3% |
| IMR 4895 | <<locked>> | 80% | 53,882 psi | 84% | 2979 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 49,661 psi | 78% | 2894 fps | 95.3% |
| IMR 7828 SSC | <<locked>> | 96% | 49,110 psi | 77% | 2989 fps | 95.7% |
| Lovex S062 | <<locked>> | 80% | 51,488 psi | 81% | 2887 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 42,525 psi | 67% | 2736 fps | 98.1% |
| Lovex S070 | <<locked>> | 80% | 40,770 psi | 64% | 2717 fps | 96.7% |
| Lovex S071 | <<locked>> | 90% | 35,099 psi | 55% | 2612 fps | 95.6% |
| Norma 203B | <<locked>> | 80% | 51,866 psi | 81% | 2936 fps | 100% |
| Norma 204 | <<locked>> | 84% | 44,367 psi | 70% | 2828 fps | 95.5% |
| Norma MRP | 73.4 gr | 86% | 37,884 psi | 59% | 2776 fps | 95.3% |
| Norma URP | <<locked>> | 80% | 39,523 psi | 62% | 2736 fps | 98.4% |
| Ramshot Big Game | <<locked>> | 80% | 52,576 psi | 82% | 2963 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 45,803 psi | 72% | 2933 fps | 95.1% |
| Ramshot Hunter | <<locked>> | 80% | 38,464 psi | 60% | 2723 fps | 96.6% |
| Ramshot Magnum | <<locked>> | 94% | 40,683 psi | 64% | 2799 fps | 95.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,949 psi | 44% | 1732 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 50,024 psi | 78% | 2887 fps | 98.9% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 46,746 psi | 73% | 2940 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 39,827 psi | 62% | 2762 fps | 98.4% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 38,392 psi | 60% | 2766 fps | 97.8% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 37,739 psi | 59% | 2802 fps | 95.1% |
| Rottweil R 902 | <<locked>> | 80% | 53,200 psi | 83% | 2897 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 46,934 psi | 74% | 2838 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 48,559 psi | 76% | 2881 fps | 95.6% |
| Rottweil R 905 | <<locked>> | 88% | 42,786 psi | 67% | 2818 fps | 95.5% |
| Rottweil R 907 | <<locked>> | 80% | 43,584 psi | 68% | 2756 fps | 96.7% |
| Shooters World Long Rifle | <<locked>> | 80% | 42,525 psi | 67% | 2736 fps | 98.1% |
| Shooters World Precision | <<locked>> | 80% | 51,488 psi | 81% | 2887 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 40,770 psi | 64% | 2717 fps | 96.7% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 48,211 psi | 76% | 2890 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 47,863 psi | 75% | 2736 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 41,698 psi | 65% | 2680 fps | 96.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 42,409 psi | 66% | 2812 fps | 95.3% |
| Somchem S355 | <<locked>> | 80% | 47,036 psi | 74% | 2831 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 49,806 psi | 78% | 2871 fps | 95.1% |
| Somchem S365 | <<locked>> | 80% | 36,158 psi | 57% | 2694 fps | 99.8% |
| Somchem S385 | <<locked>> | 86% | 40,712 psi | 64% | 2743 fps | 95.8% |
| Vihtavuori N135 | <<locked>> | 80% | 53,650 psi | 84% | 2858 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 53,664 psi | 84% | 2871 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 44,976 psi | 70% | 2759 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 40,901 psi | 64% | 2733 fps | 98.7% |
| Vihtavuori N165 | <<locked>> | 90% | 40,103 psi | 63% | 2720 fps | 95.1% |
| Vihtavuori N540 | <<locked>> | 80% | 52,040 psi | 82% | 2864 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 40,480 psi | 63% | 2740 fps | 98.5% |
| Vihtavuori N555 | <<locked>> | 80% | 31,691 psi | 50% | 2575 fps | 96.7% |
| Vihtavuori N560 | 80.2 gr | 94% | 50,343 psi | 79% | 3025 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 40,001 psi | 63% | 2700 fps | 99.8% |
| Winchester 760 | <<locked>> | 80% | 41,930 psi | 66% | 2795 fps | 96.8% |
| Winchester StaBALL HD | <<locked>> | 80% | 25,222 psi | 40% | 2457 fps | 95.1% |
| Winchester Supreme 780 | <<locked>> | 90% | 42,931 psi | 67% | 2785 fps | 95.3% |
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 94 powders for .300 Weath. Mag. loaded with the .308 | 165gr | Nosler Solid Base. Norma MRP delivers the highest muzzle velocity at 3,166 fps; across all powders the maximum-charge window runs from 1,893 fps to 3,166 fps. ADI AR 2217 gives the best case fill at 100 %, and 94 of the 94 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 52–90 %, leaving at least 10 % headroom. The 165.0 gr projectile in 0.308" calls for a 1:13.0 twist; slower twists will usually not stabilise this weight. ADI AR 2217, ADI AR 2225, Alliant Reloder-23 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. Norma MRP, Vihtavuori N560, Alliant Reloder-26 rank at the top here: for .300 Weath. Mag. with the .308 | 165gr | Nosler Solid Base they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, ADI AR 2217, Baschieri & Pellagri 109, Bofors RP30 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.