Load Specifications
Load data in caliber .300 Weath. Mag. with .311 | 180gr | Sellier & Bellot SPRN bullet and 74 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Accurate MAGPRO, Ramshot Grand 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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Max Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 96% | 56,898 psi | 89% | 2920 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 54,694 psi | 86% | 2904 fps | 100% |
| Accurate MAGPRO | <<locked>> | 94% | 55,448 psi | 87% | 3012 fps | 97.3% |
| ADI AR 2208 | <<locked>> | 82% | 55,912 psi | 88% | 2864 fps | 100% |
| ADI AR 2209 | <<locked>> | 92% | 55,390 psi | 87% | 2956 fps | 99% |
| ADI AR 2213 | <<locked>> | 96% | 56,884 psi | 89% | 3015 fps | 98.4% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 47,659 psi | 75% | 2844 fps | 96.8% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 42,293 psi | 66% | 2799 fps | 98.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 57,261 psi | 90% | 2887 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 88% | 55,390 psi | 87% | 2959 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 84% | 56,753 psi | 89% | 2976 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 92% | 54,897 psi | 86% | 2943 fps | 99% |
| Alliant Reloder-22 | <<locked>> | 96% | 56,753 psi | 89% | 3012 fps | 99.3% |
| Alliant Reloder-23 | <<locked>> | 96% | 54,012 psi | 85% | 2930 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 53,345 psi | 84% | 2986 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 92% | 54,259 psi | 85% | 3015 fps | 100% |
| Bofors RP15 | <<locked>> | 98% | 55,680 psi | 87% | 2992 fps | 99.1% |
| Bofors RP30ᴾ | <<locked>> | 100% | 49,472 psi | 78% | 2917 fps | 97.7% |
| Bofors RP5 | <<locked>> | 96% | 56,753 psi | 89% | 3012 fps | 99.3% |
| Bofors RP7 | <<locked>> | 86% | 57,145 psi | 90% | 2904 fps | 99.7% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 52,475 psi | 82% | 2936 fps | 98.5% |
| Hodgdon H414 | <<locked>> | 86% | 56,449 psi | 88% | 2956 fps | 99.8% |
| Hodgdon H4350 | <<locked>> | 84% | 55,564 psi | 87% | 2913 fps | 99.2% |
| Hodgdon H4831 | <<locked>> | 94% | 56,869 psi | 89% | 2956 fps | 97.8% |
| Hodgdon H4831 SC | <<locked>> | 94% | 55,767 psi | 87% | 2940 fps | 97.7% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 55,854 psi | 88% | 2884 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 52,257 psi | 82% | 3045 fps | 99.5% |
| Hodgdon Superformance | <<locked>> | 86% | 57,029 psi | 89% | 2995 fps | 99.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,057 psi | 58% | 1831 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 55,288 psi | 87% | 2890 fps | 99.5% |
| IMR 4451 Enduron | <<locked>> | 84% | 55,274 psi | 87% | 2877 fps | 99.7% |
| IMR 4831 | <<locked>> | 88% | 55,056 psi | 86% | 2897 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 54,375 psi | 85% | 2881 fps | 97.6% |
| IMR 7828 SSC | <<locked>> | 96% | 54,665 psi | 86% | 2992 fps | 98.2% |
| Lovex S065 | <<locked>> | 86% | 55,724 psi | 87% | 2874 fps | 100% |
| Lovex S070 | <<locked>> | 88% | 57,450 psi | 90% | 2920 fps | 99.9% |
| Lovex S071ᴾ | <<locked>> | 100% | 54,244 psi | 85% | 2881 fps | 99.9% |
| Norma 204 | <<locked>> | 88% | 56,173 psi | 88% | 2943 fps | 99% |
| Norma 217ᴾ | <<locked>> | 100% | 37,898 psi | 59% | 2717 fps | 96.4% |
| Norma MRP | <<locked>> | 94% | 56,681 psi | 89% | 3035 fps | 99.9% |
| Norma URP | <<locked>> | 88% | 56,797 psi | 89% | 2940 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 55,216 psi | 87% | 3012 fps | 98.6% |
| Ramshot Hunter | <<locked>> | 88% | 55,593 psi | 87% | 2943 fps | 100% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 57,595 psi | 90% | 3009 fps | 99.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,782 psi | 59% | 1873 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 56,188 psi | 88% | 2963 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 54,520 psi | 85% | 2927 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 56,739 psi | 89% | 3009 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 52,924 psi | 83% | 3045 fps | 99.9% |
| Rottweil R 903 | <<locked>> | 82% | 55,013 psi | 86% | 2854 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 56,637 psi | 89% | 2923 fps | 98.4% |
| Rottweil R 905 | <<locked>> | 92% | 54,302 psi | 85% | 2930 fps | 99% |
| Rottweil R 907 | <<locked>> | 86% | 57,145 psi | 90% | 2904 fps | 99.7% |
| Shooters World Long Rifle | <<locked>> | 86% | 55,724 psi | 87% | 2874 fps | 100% |
| Shooters World SW4350 | <<locked>> | 88% | 57,450 psi | 90% | 2920 fps | 99.9% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 56,463 psi | 88% | 2913 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 55,056 psi | 86% | 2733 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 54,969 psi | 86% | 2825 fps | 99.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 57,624 psi | 90% | 2986 fps | 99.4% |
| Somchem S355 | <<locked>> | 82% | 54,650 psi | 86% | 2848 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 54,723 psi | 86% | 2861 fps | 97.4% |
| Somchem S365 | <<locked>> | 90% | 57,000 psi | 89% | 2943 fps | 100% |
| Somchem S385 | <<locked>> | 92% | 54,998 psi | 86% | 2907 fps | 99.5% |
| Vihtavuori N150 | <<locked>> | 84% | 55,811 psi | 87% | 2822 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 54,984 psi | 86% | 2881 fps | 100% |
| Vihtavuori N165 | <<locked>> | 96% | 54,447 psi | 85% | 2884 fps | 99.3% |
| Vihtavuori N550 | <<locked>> | 86% | 54,244 psi | 85% | 2884 fps | 100% |
| Vihtavuori N555 | <<locked>> | 94% | 56,550 psi | 89% | 2959 fps | 100% |
| Vihtavuori N560 | <<locked>> | 94% | 56,536 psi | 89% | 3028 fps | 98% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 56,188 psi | 88% | 3005 fps | 98.2% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 54,433 psi | 85% | 2838 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 56,666 psi | 89% | 2963 fps | 99.8% |
| Winchester StaBALL HD | <<locked>> | 98% | 55,230 psi | 87% | 3064 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 54,795 psi | 86% | 2900 fps | 98.9% |
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 3100 | <<locked>> | 80% | 33,127 psi | 52% | 2467 fps | 96.1% |
| Accurate 4350 | <<locked>> | 80% | 44,483 psi | 70% | 2733 fps | 99.8% |
| Accurate MAGPRO | 80.5 gr | 90% | 48,095 psi | 75% | 2881 fps | 95.5% |
| ADI AR 2208 | <<locked>> | 80% | 52,634 psi | 82% | 2815 fps | 100% |
| ADI AR 2209 | <<locked>> | 82% | 39,697 psi | 62% | 2654 fps | 95.5% |
| ADI AR 2213 | <<locked>> | 88% | 43,439 psi | 68% | 2766 fps | 95.3% |
| ADI AR 2217 | <<locked>> | 98% | 44,512 psi | 70% | 2782 fps | 95.9% |
| ADI AR 2225 | <<locked>> | 94% | 34,824 psi | 55% | 2612 fps | 95.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 53,679 psi | 84% | 2838 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 42,714 psi | 67% | 2740 fps | 99.9% |
| Alliant Reloder-17 | <<locked>> | 80% | 49,168 psi | 77% | 2861 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 82% | 39,711 psi | 62% | 2651 fps | 95.6% |
| Alliant Reloder-22 | <<locked>> | 84% | 37,913 psi | 59% | 2648 fps | 95% |
| Alliant Reloder-23 | <<locked>> | 80% | 31,836 psi | 50% | 2500 fps | 98.9% |
| Alliant Reloder-25 | <<locked>> | 82% | 29,617 psi | 46% | 2454 fps | 95% |
| Alliant Reloder-26 | 72.4 gr | 80% | 34,592 psi | 54% | 2628 fps | 98.1% |
| Bofors RP15 | <<locked>> | 88% | 40,190 psi | 63% | 2700 fps | 95.7% |
| Bofors RP30 | <<locked>> | 94% | 40,190 psi | 63% | 2730 fps | 95% |
| Bofors RP5 | <<locked>> | 84% | 37,913 psi | 59% | 2648 fps | 95% |
| Bofors RP7 | <<locked>> | 80% | 47,456 psi | 74% | 2736 fps | 98.5% |
| Hodgdon H1000 | <<locked>> | 92% | 39,929 psi | 63% | 2684 fps | 95% |
| Hodgdon H414 | <<locked>> | 80% | 46,224 psi | 72% | 2779 fps | 98.7% |
| Hodgdon H4350 | <<locked>> | 80% | 48,849 psi | 77% | 2799 fps | 98.2% |
| Hodgdon H4831 | <<locked>> | 88% | 46,485 psi | 73% | 2776 fps | 95.5% |
| Hodgdon H4831 SC | <<locked>> | 88% | 45,542 psi | 71% | 2756 fps | 95.3% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 40,219 psi | 63% | 2625 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 90% | 37,594 psi | 59% | 2720 fps | 95.4% |
| Hodgdon Superformance | <<locked>> | 80% | 45,672 psi | 72% | 2802 fps | 98.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,717 psi | 43% | 1634 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 42,975 psi | 67% | 2667 fps | 97.6% |
| IMR 4451 Enduron | <<locked>> | 80% | 48,704 psi | 76% | 2762 fps | 99% |
| IMR 4831 | <<locked>> | 80% | 42,424 psi | 66% | 2680 fps | 99.7% |
| IMR 4955 Enduron | <<locked>> | 86% | 45,092 psi | 71% | 2713 fps | 95.4% |
| IMR 7828 SSC | <<locked>> | 90% | 44,585 psi | 70% | 2805 fps | 95.8% |
| Lovex S065 | <<locked>> | 80% | 46,412 psi | 73% | 2713 fps | 99.5% |
| Lovex S070 | <<locked>> | 80% | 44,657 psi | 70% | 2700 fps | 98.6% |
| Lovex S071 | <<locked>> | 84% | 32,590 psi | 51% | 2454 fps | 95.9% |
| Norma 204 | <<locked>> | 80% | 42,728 psi | 67% | 2700 fps | 96.3% |
| Norma 217 | <<locked>> | 98% | 35,389 psi | 55% | 2654 fps | 95.3% |
| Norma MRP | <<locked>> | 80% | 34,548 psi | 54% | 2595 fps | 95.3% |
| Norma URP | <<locked>> | 80% | 43,758 psi | 69% | 2720 fps | 99.7% |
| Ramshot Grand | 76.6 gr | 88% | 41,350 psi | 65% | 2746 fps | 95.1% |
| Ramshot Hunter | <<locked>> | 80% | 42,511 psi | 67% | 2710 fps | 98.7% |
| Ramshot Magnum | <<locked>> | 88% | 36,956 psi | 58% | 2625 fps | 95.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,268 psi | 44% | 1673 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 52,214 psi | 82% | 2904 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 44,512 psi | 70% | 2753 fps | 99.7% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 42,598 psi | 67% | 2766 fps | 99.5% |
| ReloadSwiss RS 76 | <<locked>> | 88% | 34,374 psi | 54% | 2628 fps | 95.2% |
| Rottweil R 903 | <<locked>> | 80% | 51,517 psi | 81% | 2802 fps | 100% |
| Rottweil R 904 | <<locked>> | 84% | 43,918 psi | 69% | 2697 fps | 95.6% |
| Rottweil R 905 | <<locked>> | 82% | 39,044 psi | 61% | 2638 fps | 95.6% |
| Rottweil R 907 | <<locked>> | 80% | 47,456 psi | 74% | 2736 fps | 98.5% |
| Shooters World Long Rifle | <<locked>> | 80% | 46,412 psi | 73% | 2713 fps | 99.5% |
| Shooters World SW4350 | <<locked>> | 80% | 44,657 psi | 70% | 2700 fps | 98.6% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 52,736 psi | 83% | 2858 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 51,750 psi | 81% | 2684 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 45,397 psi | 71% | 2664 fps | 98.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 82% | 38,696 psi | 61% | 2631 fps | 95.4% |
| Somchem S355 | <<locked>> | 80% | 51,416 psi | 81% | 2799 fps | 100% |
| Somchem S361 | <<locked>> | 84% | 44,802 psi | 70% | 2687 fps | 95% |
| Somchem S365 | <<locked>> | 80% | 40,683 psi | 64% | 2677 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 37,130 psi | 58% | 2566 fps | 95.8% |
| Vihtavuori N150 | <<locked>> | 80% | 49,139 psi | 77% | 2723 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 45,107 psi | 71% | 2717 fps | 99.8% |
| Vihtavuori N165 | <<locked>> | 84% | 36,651 psi | 57% | 2546 fps | 95.2% |
| Vihtavuori N550 | <<locked>> | 80% | 44,570 psi | 70% | 2720 fps | 99.7% |
| Vihtavuori N555 | <<locked>> | 80% | 35,650 psi | 56% | 2575 fps | 98.9% |
| Vihtavuori N560 | <<locked>> | 88% | 45,861 psi | 72% | 2835 fps | 95.6% |
| Vihtavuori N565 | <<locked>> | 94% | 45,803 psi | 72% | 2818 fps | 95.9% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 44,280 psi | 69% | 2680 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 46,383 psi | 73% | 2782 fps | 98.8% |
| Winchester StaBALL HD | <<locked>> | 80% | 28,181 psi | 44% | 2497 fps | 98.8% |
| Winchester Supreme 780 | <<locked>> | 84% | 38,783 psi | 61% | 2602 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 74 powders for .300 Weath. Mag. loaded with the .311 | 180gr | Sellier & Bellot SPRN. Winchester StaBALL HD delivers the highest muzzle velocity at 3,064 fps; across all powders the maximum-charge window runs from 1,831 fps to 3,064 fps. ADI AR 2217 gives the best case fill at 100 %, and 74 of the 74 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 180.0 gr projectile in 0.311" calls for a 1:16.5 twist; slower twists will usually not stabilise this weight. ADI AR 2217, ADI AR 2225, Alliant Reloder-25 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. Accurate MAGPRO, Ramshot Grand, Alliant Reloder-26 rank at the top here: for .300 Weath. Mag. with the .311 | 180gr | Sellier & Bellot SPRN 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.