Load Specifications
Load data in caliber .300 Weath. Mag. with .308 | 168gr | Sellier & Bellot HPBT bullet and 84 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% | 56,144 psi | 88% | 2930 fps | 99% |
| Accurate 3100 | <<locked>> | 98% | 55,434 psi | 87% | 2986 fps | 99.8% |
| Accurate 4064 | <<locked>> | 82% | 55,854 psi | 88% | 2913 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 57,130 psi | 90% | 3031 fps | 100% |
| Accurate MAGPRO | <<locked>> | 98% | 57,696 psi | 90% | 3130 fps | 96.8% |
| ADI AR 2208 | <<locked>> | 84% | 55,535 psi | 87% | 2946 fps | 100% |
| ADI AR 2209 | <<locked>> | 94% | 54,331 psi | 85% | 3018 fps | 98.2% |
| ADI AR 2213 | <<locked>> | 98% | 55,796 psi | 87% | 3074 fps | 97.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 56,608 psi | 89% | 2972 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 56,782 psi | 89% | 2992 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 90% | 54,201 psi | 85% | 3035 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 86% | 55,448 psi | 87% | 3054 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 96% | 57,508 psi | 90% | 3068 fps | 98.7% |
| Alliant Reloder-22 | <<locked>> | 98% | 55,245 psi | 87% | 3074 fps | 98.5% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 55,796 psi | 87% | 3051 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 48,399 psi | 76% | 2986 fps | 99.7% |
| Alliant Reloder-26 | <<locked>> | 96% | 56,275 psi | 88% | 3143 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 53,896 psi | 84% | 3048 fps | 98.2% |
| Bofors RP3 | <<locked>> | 84% | 57,740 psi | 90% | 2992 fps | 100% |
| Bofors RP5 | <<locked>> | 98% | 55,245 psi | 87% | 3074 fps | 98.5% |
| Bofors RP7 | <<locked>> | 88% | 56,811 psi | 89% | 2979 fps | 99.2% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 47,790 psi | 75% | 2920 fps | 96.4% |
| Hodgdon H380 | <<locked>> | 82% | 54,302 psi | 85% | 2953 fps | 100% |
| Hodgdon H414 | <<locked>> | 88% | 55,463 psi | 87% | 3028 fps | 99.4% |
| Hodgdon H4350 | <<locked>> | 86% | 54,795 psi | 86% | 2982 fps | 98.5% |
| Hodgdon H4831 | <<locked>> | 96% | 55,753 psi | 87% | 3015 fps | 96.7% |
| Hodgdon H4831 SC | <<locked>> | 96% | 54,621 psi | 86% | 2995 fps | 96.5% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 54,563 psi | 86% | 2956 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 47,384 psi | 74% | 3025 fps | 97.8% |
| Hodgdon Superformance | <<locked>> | 88% | 55,753 psi | 87% | 3064 fps | 99.3% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,724 psi | 58% | 1877 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 54,940 psi | 86% | 2930 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 57,479 psi | 90% | 2969 fps | 99.5% |
| IMR 4350 | <<locked>> | 90% | 54,433 psi | 85% | 2956 fps | 99% |
| IMR 4451 Enduron | <<locked>> | 86% | 54,766 psi | 86% | 2946 fps | 99.2% |
| IMR 4831 | <<locked>> | 92% | 57,566 psi | 90% | 3022 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 57,087 psi | 89% | 3002 fps | 97.2% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 57,014 psi | 89% | 3110 fps | 97.7% |
| Lovex S062 | <<locked>> | 82% | 55,419 psi | 87% | 2923 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 55,114 psi | 86% | 2946 fps | 99.8% |
| Lovex S070 | <<locked>> | 90% | 56,536 psi | 89% | 2989 fps | 99.6% |
| Lovex S071ᴾ | <<locked>> | 100% | 49,356 psi | 77% | 2884 fps | 99.2% |
| Norma 203B | <<locked>> | 82% | 56,072 psi | 88% | 2979 fps | 100% |
| Norma 204 | <<locked>> | 90% | 55,201 psi | 87% | 3009 fps | 98.2% |
| Norma MRP | <<locked>> | 96% | 54,911 psi | 86% | 3097 fps | 99.4% |
| Norma URP | <<locked>> | 90% | 55,593 psi | 87% | 3015 fps | 100% |
| Ramshot Big Game | <<locked>> | 82% | 57,087 psi | 89% | 3005 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 53,766 psi | 84% | 3064 fps | 97.5% |
| Ramshot Hunter | <<locked>> | 90% | 54,404 psi | 85% | 3012 fps | 99.7% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 51,880 psi | 81% | 2999 fps | 98.6% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,391 psi | 59% | 1919 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 57,682 psi | 90% | 2992 fps | 99.8% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 54,897 psi | 86% | 3045 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 57,261 psi | 90% | 3058 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 55,361 psi | 87% | 3081 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 47,703 psi | 75% | 3022 fps | 98.8% |
| Rottweil R 902 | <<locked>> | 82% | 57,217 psi | 90% | 2933 fps | 100% |
| Rottweil R 903 | <<locked>> | 84% | 54,288 psi | 85% | 2933 fps | 100% |
| Rottweil R 904 | <<locked>> | 94% | 55,811 psi | 87% | 2989 fps | 97.5% |
| Rottweil R 905 | <<locked>> | 96% | 56,898 psi | 89% | 3054 fps | 98.7% |
| Rottweil R 907 | <<locked>> | 88% | 56,811 psi | 89% | 2979 fps | 99.2% |
| Shooters World Long Rifle | <<locked>> | 88% | 55,114 psi | 86% | 2946 fps | 99.8% |
| Shooters World Precision | <<locked>> | 82% | 55,419 psi | 87% | 2923 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 56,536 psi | 89% | 2989 fps | 99.6% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 55,782 psi | 87% | 2992 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 54,737 psi | 86% | 2815 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 54,766 psi | 86% | 2900 fps | 99.3% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 56,420 psi | 88% | 3051 fps | 98.7% |
| Somchem S355 | <<locked>> | 86% | 57,450 psi | 90% | 2979 fps | 100% |
| Somchem S361 | <<locked>> | 94% | 57,624 psi | 90% | 2982 fps | 97.1% |
| Somchem S365 | <<locked>> | 92% | 55,550 psi | 87% | 3018 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 57,435 psi | 90% | 3028 fps | 99.3% |
| Vihtavuori N150 | <<locked>> | 86% | 55,288 psi | 87% | 2900 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 57,624 psi | 90% | 3009 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 56,739 psi | 89% | 2999 fps | 99% |
| Vihtavuori N540 | <<locked>> | 82% | 56,130 psi | 88% | 2900 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 56,782 psi | 89% | 3012 fps | 100% |
| Vihtavuori N555 | <<locked>> | 96% | 54,723 psi | 86% | 3025 fps | 100% |
| Vihtavuori N560 | <<locked>> | 96% | 55,013 psi | 86% | 3087 fps | 96.9% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 50,691 psi | 79% | 2992 fps | 96.2% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 57,334 psi | 90% | 2969 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 55,680 psi | 87% | 3031 fps | 99.4% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 52,127 psi | 82% | 3127 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 57,595 psi | 90% | 3022 fps | 98.7% |
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% | 52,562 psi | 82% | 2874 fps | 98.5% |
| Accurate 3100 | <<locked>> | 84% | 34,374 psi | 54% | 2575 fps | 95.6% |
| Accurate 4064 | <<locked>> | 80% | 52,460 psi | 82% | 2864 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 40,712 psi | 64% | 2740 fps | 98.9% |
| Accurate MAGPRO | <<locked>> | 94% | 50,183 psi | 79% | 3002 fps | 95% |
| ADI AR 2208 | <<locked>> | 80% | 49,037 psi | 77% | 2838 fps | 100% |
| ADI AR 2209 | <<locked>> | 86% | 41,742 psi | 65% | 2776 fps | 95.1% |
| ADI AR 2213 | <<locked>> | 94% | 48,747 psi | 76% | 2946 fps | 95.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 49,951 psi | 78% | 2864 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 53,316 psi | 84% | 2940 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 39,233 psi | 61% | 2746 fps | 99% |
| Alliant Reloder-17 | <<locked>> | 80% | 44,875 psi | 70% | 2877 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 41,582 psi | 65% | 2769 fps | 95.1% |
| Alliant Reloder-22 | <<locked>> | 90% | 42,018 psi | 66% | 2822 fps | 95.5% |
| Alliant Reloder-23 | <<locked>> | 80% | 28,877 psi | 45% | 2487 fps | 97% |
| Alliant Reloder-25 | <<locked>> | 88% | 32,822 psi | 51% | 2618 fps | 95.5% |
| Alliant Reloder-26 | 70.4 gr | 80% | 31,154 psi | 49% | 2608 fps | 95.5% |
| Bofors RP15 | <<locked>> | 92% | 41,626 psi | 65% | 2812 fps | 95.1% |
| Bofors RP3 | <<locked>> | 80% | 50,618 psi | 79% | 2881 fps | 100% |
| Bofors RP5 | <<locked>> | 90% | 42,018 psi | 66% | 2822 fps | 95.5% |
| Bofors RP7 | <<locked>> | 80% | 44,266 psi | 69% | 2753 fps | 97.1% |
| Hodgdon H1000 | <<locked>> | 98% | 44,744 psi | 70% | 2858 fps | 95.4% |
| Hodgdon H380 | <<locked>> | 80% | 50,778 psi | 80% | 2894 fps | 99.8% |
| Hodgdon H414 | <<locked>> | 80% | 42,496 psi | 67% | 2785 fps | 97.2% |
| Hodgdon H4350 | <<locked>> | 80% | 45,252 psi | 71% | 2805 fps | 96.6% |
| Hodgdon H4831 | <<locked>> | 92% | 48,733 psi | 76% | 2894 fps | 95% |
| Hodgdon H4831 SC | <<locked>> | 94% | 51,198 psi | 80% | 2936 fps | 95.7% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 36,753 psi | 58% | 2631 fps | 99.3% |
| Hodgdon Retumbo | <<locked>> | 96% | 41,568 psi | 65% | 2890 fps | 95.8% |
| Hodgdon Superformance | <<locked>> | 80% | 41,524 psi | 65% | 2799 fps | 96.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,485 psi | 43% | 1680 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 51,576 psi | 81% | 2874 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 53,867 psi | 84% | 2910 fps | 99.2% |
| IMR 4350 | <<locked>> | 80% | 39,726 psi | 62% | 2674 fps | 95.8% |
| IMR 4451 Enduron | <<locked>> | 80% | 45,556 psi | 71% | 2782 fps | 97.8% |
| IMR 4831 | <<locked>> | 80% | 38,827 psi | 61% | 2684 fps | 98.6% |
| IMR 4955 Enduron | <<locked>> | 92% | 50,488 psi | 79% | 2890 fps | 95.8% |
| IMR 7828 SSC | <<locked>> | 94% | 46,644 psi | 73% | 2920 fps | 95.2% |
| Lovex S062 | <<locked>> | 80% | 52,054 psi | 82% | 2871 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 43,033 psi | 67% | 2726 fps | 98.4% |
| Lovex S070 | <<locked>> | 80% | 41,307 psi | 65% | 2707 fps | 97% |
| Lovex S071 | <<locked>> | 88% | 33,504 psi | 53% | 2552 fps | 95.2% |
| Norma 203B | <<locked>> | 80% | 52,678 psi | 83% | 2927 fps | 100% |
| Norma 204 | <<locked>> | 82% | 42,148 psi | 66% | 2762 fps | 95.1% |
| Norma MRP | 73.4 gr | 86% | 38,493 psi | 60% | 2769 fps | 95.8% |
| Norma URP | <<locked>> | 80% | 40,059 psi | 63% | 2726 fps | 98.7% |
| Ramshot Big Game | <<locked>> | 80% | 53,229 psi | 83% | 2946 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 46,543 psi | 73% | 2930 fps | 95.6% |
| Ramshot Hunter | <<locked>> | 80% | 39,001 psi | 61% | 2717 fps | 97% |
| Ramshot Magnum | <<locked>> | 92% | 38,667 psi | 61% | 2733 fps | 95% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,992 psi | 44% | 1719 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 50,633 psi | 79% | 2877 fps | 99.1% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 47,630 psi | 75% | 2930 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 40,451 psi | 63% | 2756 fps | 98.6% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 38,943 psi | 61% | 2762 fps | 98.1% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 38,479 psi | 60% | 2805 fps | 95.8% |
| Rottweil R 902 | <<locked>> | 80% | 53,780 psi | 84% | 2884 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 47,514 psi | 74% | 2822 fps | 100% |
| Rottweil R 904 | <<locked>> | 88% | 46,180 psi | 72% | 2815 fps | 95.2% |
| Rottweil R 905 | <<locked>> | 86% | 40,640 psi | 64% | 2749 fps | 95% |
| Rottweil R 907 | <<locked>> | 80% | 44,266 psi | 69% | 2753 fps | 97.1% |
| Shooters World Long Rifle | <<locked>> | 80% | 43,033 psi | 67% | 2726 fps | 98.4% |
| Shooters World Precision | <<locked>> | 80% | 52,054 psi | 82% | 2871 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 41,307 psi | 65% | 2707 fps | 97% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 48,834 psi | 77% | 2881 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 48,370 psi | 76% | 2720 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 42,177 psi | 66% | 2671 fps | 97.2% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 43,236 psi | 68% | 2808 fps | 95.8% |
| Somchem S355 | <<locked>> | 80% | 47,645 psi | 75% | 2822 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 50,430 psi | 79% | 2864 fps | 95.5% |
| Somchem S365 | <<locked>> | 80% | 36,738 psi | 58% | 2684 fps | 99.9% |
| Somchem S385 | <<locked>> | 84% | 38,783 psi | 61% | 2677 fps | 95.4% |
| Vihtavuori N150 | <<locked>> | 80% | 45,527 psi | 71% | 2746 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 41,626 psi | 65% | 2730 fps | 99% |
| Vihtavuori N165 | <<locked>> | 90% | 40,727 psi | 64% | 2713 fps | 95.6% |
| Vihtavuori N540 | <<locked>> | 80% | 52,649 psi | 83% | 2851 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 41,060 psi | 64% | 2730 fps | 98.7% |
| Vihtavuori N555 | <<locked>> | 80% | 32,256 psi | 51% | 2572 fps | 97.1% |
| Vihtavuori N560 | 78.6 gr | 92% | 47,921 psi | 75% | 2956 fps | 95.1% |
| Vihtavuori N565 | <<locked>> | 98% | 47,253 psi | 74% | 2927 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 40,567 psi | 64% | 2694 fps | 99.9% |
| Winchester 760 | <<locked>> | 80% | 42,496 psi | 67% | 2785 fps | 97.2% |
| Winchester StaBALL HD | <<locked>> | 80% | 25,628 psi | 40% | 2461 fps | 95.9% |
| Winchester Supreme 780 | <<locked>> | 90% | 43,540 psi | 68% | 2776 fps | 95.7% |
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 84 powders for .300 Weath. Mag. loaded with the .308 | 168gr | Sellier & Bellot HPBT. Alliant Reloder-26 delivers the highest muzzle velocity at 3,143 fps; across all powders the maximum-charge window runs from 1,877 fps to 3,143 fps. Alliant Reloder-23 gives the best case fill at 100 %, and 84 of the 84 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 58–90 %, leaving at least 10 % headroom. The 168.0 gr projectile in 0.308" calls for a 1:12.5 twist; slower twists will usually not stabilise this weight. Alliant Reloder-23, Alliant Reloder-25, Bofors RP15 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 | 168gr | Sellier & Bellot HPBT 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.