Load Specifications
Load data in caliber .300 Weath. Mag. with .308 | 180gr | Sellier & Bellot HPC bullet and 82 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 Vihtavuori N560.
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% | 57,667 psi | 90% | 2861 fps | 99.5% |
| Accurate 3100 | <<locked>> | 98% | 57,246 psi | 90% | 2917 fps | 100% |
| Accurate 4064 | <<locked>> | 82% | 57,580 psi | 90% | 2838 fps | 100% |
| Accurate 4350 | <<locked>> | 88% | 55,216 psi | 87% | 2904 fps | 100% |
| Accurate MAGPRO | <<locked>> | 96% | 55,825 psi | 87% | 3009 fps | 97.1% |
| ADI AR 2208 | <<locked>> | 84% | 57,087 psi | 89% | 2874 fps | 100% |
| ADI AR 2209 | <<locked>> | 94% | 55,985 psi | 88% | 2956 fps | 98.9% |
| ADI AR 2213 | <<locked>> | 98% | 57,479 psi | 90% | 3015 fps | 98.3% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 39,798 psi | 62% | 2730 fps | 97.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 54,766 psi | 86% | 2844 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 90% | 56,086 psi | 88% | 2963 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 86% | 57,377 psi | 90% | 2979 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 55,419 psi | 87% | 2940 fps | 98.9% |
| Alliant Reloder-22 | <<locked>> | 98% | 57,029 psi | 89% | 3009 fps | 99.2% |
| Alliant Reloder-23 | <<locked>> | 98% | 54,172 psi | 85% | 2930 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 50,038 psi | 78% | 2923 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 94% | 54,447 psi | 85% | 3015 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 55,941 psi | 88% | 2989 fps | 99% |
| Bofors RP3 | <<locked>> | 82% | 55,753 psi | 87% | 2864 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 45,919 psi | 72% | 2848 fps | 96.6% |
| Bofors RP5 | <<locked>> | 98% | 57,029 psi | 89% | 3009 fps | 99.2% |
| Bofors RP7 | <<locked>> | 86% | 54,839 psi | 86% | 2854 fps | 99.3% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 49,342 psi | 77% | 2867 fps | 97.5% |
| Hodgdon H380 | <<locked>> | 82% | 55,840 psi | 88% | 2881 fps | 100% |
| Hodgdon H414 | <<locked>> | 88% | 57,203 psi | 90% | 2959 fps | 99.8% |
| Hodgdon H4350 | <<locked>> | 86% | 56,463 psi | 88% | 2917 fps | 99.1% |
| Hodgdon H4831 | <<locked>> | 96% | 57,638 psi | 90% | 2953 fps | 97.7% |
| Hodgdon H4831 SC | <<locked>> | 96% | 56,449 psi | 88% | 2936 fps | 97.5% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 56,304 psi | 88% | 2884 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 49,095 psi | 77% | 2976 fps | 98.8% |
| Hodgdon Superformance | <<locked>> | 88% | 57,740 psi | 90% | 2999 fps | 99.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,869 psi | 58% | 1808 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 56,434 psi | 88% | 2851 fps | 100% |
| IMR 4350 | <<locked>> | 90% | 56,144 psi | 88% | 2894 fps | 99.5% |
| IMR 4451 Enduron | <<locked>> | 86% | 56,217 psi | 88% | 2877 fps | 99.6% |
| IMR 4831 | <<locked>> | 90% | 55,724 psi | 87% | 2900 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 55,100 psi | 86% | 2881 fps | 97.4% |
| IMR 7828 SSC | <<locked>> | 98% | 55,071 psi | 86% | 2989 fps | 98% |
| Lovex S062 | <<locked>> | 82% | 56,927 psi | 89% | 2848 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 56,652 psi | 89% | 2877 fps | 100% |
| Lovex S070 | <<locked>> | 88% | 54,766 psi | 86% | 2871 fps | 99.7% |
| Lovex S071ᴾ | <<locked>> | 100% | 51,039 psi | 80% | 2825 fps | 99.7% |
| Norma 203B | <<locked>> | 82% | 57,522 psi | 90% | 2900 fps | 100% |
| Norma 204 | <<locked>> | 90% | 57,014 psi | 89% | 2946 fps | 98.9% |
| Norma MRP | <<locked>> | 96% | 56,884 psi | 89% | 3035 fps | 99.8% |
| Norma URP | <<locked>> | 90% | 57,508 psi | 90% | 2943 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 55,724 psi | 87% | 3009 fps | 98.4% |
| Ramshot Hunter | <<locked>> | 90% | 56,246 psi | 88% | 2946 fps | 100% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 53,780 psi | 84% | 2943 fps | 99.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,594 psi | 59% | 1850 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 55,550 psi | 87% | 2864 fps | 99.8% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 56,739 psi | 89% | 2966 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 55,187 psi | 86% | 2930 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 57,261 psi | 90% | 3012 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 49,269 psi | 77% | 2972 fps | 99.5% |
| Rottweil R 903 | <<locked>> | 84% | 55,825 psi | 87% | 2858 fps | 100% |
| Rottweil R 904 | <<locked>> | 94% | 57,580 psi | 90% | 2927 fps | 98.3% |
| Rottweil R 905 | <<locked>> | 94% | 54,984 psi | 86% | 2933 fps | 98.9% |
| Rottweil R 907 | <<locked>> | 86% | 54,839 psi | 86% | 2854 fps | 99.3% |
| Shooters World Long Rifle | <<locked>> | 88% | 56,652 psi | 89% | 2877 fps | 100% |
| Shooters World Precision | <<locked>> | 82% | 56,927 psi | 89% | 2848 fps | 100% |
| Shooters World SW4350 | <<locked>> | 88% | 54,766 psi | 86% | 2871 fps | 99.7% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 57,261 psi | 90% | 2917 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 56,144 psi | 88% | 2736 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 56,188 psi | 88% | 2831 fps | 99.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 54,534 psi | 85% | 2930 fps | 98.9% |
| Somchem S355 | <<locked>> | 84% | 55,651 psi | 87% | 2854 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 55,477 psi | 87% | 2861 fps | 97.3% |
| Somchem S365 | <<locked>> | 92% | 57,363 psi | 90% | 2943 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 55,593 psi | 87% | 2907 fps | 99.4% |
| Vihtavuori N150 | <<locked>> | 86% | 56,884 psi | 89% | 2828 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 55,651 psi | 87% | 2881 fps | 100% |
| Vihtavuori N165 | <<locked>> | 98% | 54,810 psi | 86% | 2881 fps | 99.1% |
| Vihtavuori N540 | <<locked>> | 82% | 57,595 psi | 90% | 2825 fps | 100% |
| Vihtavuori N550 | <<locked>> | 88% | 54,969 psi | 86% | 2890 fps | 100% |
| Vihtavuori N555 | <<locked>> | 96% | 56,565 psi | 89% | 2956 fps | 100% |
| Vihtavuori N560 | <<locked>> | 96% | 56,884 psi | 89% | 3025 fps | 97.9% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 52,417 psi | 82% | 2936 fps | 97.3% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 55,274 psi | 87% | 2844 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 57,435 psi | 90% | 2963 fps | 99.8% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 54,810 psi | 86% | 3064 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 55,477 psi | 87% | 2900 fps | 98.8% |
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% | 53,954 psi | 85% | 2805 fps | 99.1% |
| Accurate 3100 | <<locked>> | 80% | 31,140 psi | 49% | 2415 fps | 95% |
| Accurate 4064 | <<locked>> | 80% | 53,983 psi | 85% | 2789 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 42,018 psi | 66% | 2677 fps | 99.5% |
| Accurate MAGPRO | <<locked>> | 92% | 48,457 psi | 76% | 2881 fps | 95.3% |
| ADI AR 2208 | <<locked>> | 80% | 50,488 psi | 79% | 2769 fps | 100% |
| ADI AR 2209 | <<locked>> | 84% | 40,350 psi | 63% | 2661 fps | 95.4% |
| ADI AR 2213 | <<locked>> | 90% | 43,888 psi | 69% | 2766 fps | 95% |
| ADI AR 2225 | <<locked>> | 96% | 35,070 psi | 55% | 2608 fps | 95.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 51,372 psi | 81% | 2795 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 40,524 psi | 64% | 2690 fps | 99.6% |
| Alliant Reloder-17 | <<locked>> | 80% | 46,456 psi | 73% | 2812 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 84% | 40,118 psi | 63% | 2654 fps | 95.5% |
| Alliant Reloder-22 | <<locked>> | 88% | 40,741 psi | 64% | 2710 fps | 95.8% |
| Alliant Reloder-23 | <<locked>> | 80% | 29,936 psi | 47% | 2444 fps | 98.2% |
| Alliant Reloder-25 | <<locked>> | 86% | 31,894 psi | 50% | 2516 fps | 95.9% |
| Alliant Reloder-26 | 68.8 gr | 80% | 32,271 psi | 51% | 2566 fps | 97% |
| Bofors RP15 | <<locked>> | 90% | 40,393 psi | 63% | 2700 fps | 95.5% |
| Bofors RP3 | <<locked>> | 80% | 52,025 psi | 82% | 2805 fps | 100% |
| Bofors RP30 | <<locked>> | 98% | 42,902 psi | 67% | 2785 fps | 95.7% |
| Bofors RP5 | <<locked>> | 88% | 40,741 psi | 64% | 2710 fps | 95.8% |
| Bofors RP7 | <<locked>> | 80% | 45,484 psi | 71% | 2690 fps | 97.9% |
| Hodgdon H1000 | <<locked>> | 96% | 43,120 psi | 68% | 2743 fps | 95.7% |
| Hodgdon H380 | <<locked>> | 80% | 52,141 psi | 82% | 2825 fps | 100% |
| Hodgdon H414 | <<locked>> | 80% | 43,801 psi | 69% | 2726 fps | 98.1% |
| Hodgdon H4350 | <<locked>> | 80% | 46,499 psi | 73% | 2743 fps | 97.5% |
| Hodgdon H4831 | <<locked>> | 90% | 46,978 psi | 74% | 2772 fps | 95.3% |
| Hodgdon H4831 SC | <<locked>> | 90% | 46,021 psi | 72% | 2756 fps | 95.1% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 38,029 psi | 60% | 2572 fps | 99.8% |
| Hodgdon Retumbo | <<locked>> | 92% | 37,666 psi | 59% | 2713 fps | 95.1% |
| Hodgdon Superformance | <<locked>> | 80% | 42,946 psi | 67% | 2743 fps | 97.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,586 psi | 43% | 1617 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 53,142 psi | 83% | 2805 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 40,930 psi | 64% | 2615 fps | 96.8% |
| IMR 4451 Enduron | <<locked>> | 80% | 46,775 psi | 73% | 2717 fps | 98.5% |
| IMR 4831 | <<locked>> | 80% | 40,190 psi | 63% | 2628 fps | 99.3% |
| IMR 4955 Enduron | <<locked>> | 88% | 45,803 psi | 72% | 2717 fps | 95.2% |
| IMR 7828 SSC | <<locked>> | 92% | 45,063 psi | 71% | 2802 fps | 95.5% |
| Lovex S062 | <<locked>> | 80% | 53,461 psi | 84% | 2799 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 44,237 psi | 69% | 2664 fps | 99.1% |
| Lovex S070 | <<locked>> | 80% | 42,511 psi | 67% | 2651 fps | 98% |
| Lovex S071 | <<locked>> | 86% | 32,605 psi | 51% | 2454 fps | 95.7% |
| Norma 203B | <<locked>> | 80% | 54,012 psi | 85% | 2848 fps | 100% |
| Norma 204 | <<locked>> | 80% | 40,553 psi | 64% | 2644 fps | 95.4% |
| Norma MRP | 68.5 gr | 82% | 34,780 psi | 55% | 2595 fps | 95.1% |
| Norma URP | <<locked>> | 80% | 41,423 psi | 65% | 2667 fps | 99.4% |
| Ramshot Grand | <<locked>> | 92% | 44,875 psi | 70% | 2812 fps | 95.9% |
| Ramshot Hunter | <<locked>> | 80% | 40,263 psi | 63% | 2657 fps | 98% |
| Ramshot Magnum | <<locked>> | 90% | 37,173 psi | 58% | 2621 fps | 95.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,123 psi | 44% | 1657 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 51,967 psi | 81% | 2808 fps | 99.6% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 49,298 psi | 77% | 2861 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 41,901 psi | 66% | 2697 fps | 99.3% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 40,277 psi | 63% | 2710 fps | 99% |
| ReloadSwiss RS 76 | <<locked>> | 92% | 37,043 psi | 58% | 2694 fps | 96.1% |
| Rottweil R 903 | <<locked>> | 80% | 48,994 psi | 77% | 2756 fps | 100% |
| Rottweil R 904 | <<locked>> | 86% | 44,614 psi | 70% | 2700 fps | 95.5% |
| Rottweil R 905 | <<locked>> | 84% | 39,378 psi | 62% | 2638 fps | 95.4% |
| Rottweil R 907 | <<locked>> | 80% | 45,484 psi | 71% | 2690 fps | 97.9% |
| Shooters World Long Rifle | <<locked>> | 80% | 44,237 psi | 69% | 2664 fps | 99.1% |
| Shooters World Precision | <<locked>> | 80% | 53,461 psi | 84% | 2799 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 42,511 psi | 67% | 2651 fps | 98% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 50,227 psi | 79% | 2808 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 49,719 psi | 78% | 2648 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 43,410 psi | 68% | 2612 fps | 98% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 39,015 psi | 61% | 2635 fps | 95.3% |
| Somchem S355 | <<locked>> | 80% | 48,994 psi | 77% | 2749 fps | 100% |
| Somchem S361 | <<locked>> | 88% | 48,617 psi | 76% | 2746 fps | 95.8% |
| Somchem S365 | <<locked>> | 80% | 38,232 psi | 60% | 2628 fps | 100% |
| Somchem S385 | <<locked>> | 82% | 37,565 psi | 59% | 2569 fps | 95.7% |
| Vihtavuori N150 | <<locked>> | 80% | 46,847 psi | 73% | 2677 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 42,844 psi | 67% | 2667 fps | 99.5% |
| Vihtavuori N165 | <<locked>> | 86% | 36,898 psi | 58% | 2546 fps | 95% |
| Vihtavuori N540 | <<locked>> | 80% | 53,925 psi | 85% | 2776 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 42,279 psi | 66% | 2667 fps | 99.3% |
| Vihtavuori N555 | <<locked>> | 80% | 33,533 psi | 53% | 2523 fps | 98.2% |
| Vihtavuori N560 | 75.2 gr | 90% | 46,253 psi | 72% | 2835 fps | 95.4% |
| Vihtavuori N565 | <<locked>> | 96% | 45,716 psi | 72% | 2812 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 41,872 psi | 66% | 2631 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 44,005 psi | 69% | 2730 fps | 98.1% |
| Winchester StaBALL HD | <<locked>> | 80% | 26,527 psi | 42% | 2431 fps | 97.7% |
| Winchester Supreme 780 | <<locked>> | 86% | 39,262 psi | 62% | 2605 fps | 95.1% |
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 82 powders for .300 Weath. Mag. loaded with the .308 | 180gr | Sellier & Bellot HPC. Winchester StaBALL HD delivers the highest muzzle velocity at 3,064 fps; across all powders the maximum-charge window runs from 1,808 fps to 3,064 fps. ADI AR 2225 gives the best case fill at 100 %, and 82 of the 82 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 0.308" calls for a 1:11.5 twist; slower twists will usually not stabilise this weight. ADI AR 2225, 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. Alliant Reloder-26, Norma MRP, Vihtavuori N560 rank at the top here: for .300 Weath. Mag. with the .308 | 180gr | Sellier & Bellot HPC 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.