Load Specifications
Load data in caliber .300 Weath. Mag. with .308 | 180gr | Sellier & Bellot XRG bullet and 78 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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Max Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 98% | 57,711 psi | 90% | 2920 fps | 100% |
| Accurate 4350 | <<locked>> | 88% | 55,651 psi | 87% | 2907 fps | 100% |
| Accurate MAGPRO | <<locked>> | 96% | 56,202 psi | 88% | 3012 fps | 97.1% |
| ADI AR 2208 | <<locked>> | 84% | 57,319 psi | 90% | 2871 fps | 100% |
| ADI AR 2209 | <<locked>> | 94% | 56,275 psi | 88% | 2956 fps | 98.9% |
| ADI AR 2213 | <<locked>> | 96% | 54,085 psi | 85% | 2956 fps | 97.7% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 40,016 psi | 63% | 2730 fps | 97.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 55,071 psi | 86% | 2844 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 90% | 56,376 psi | 88% | 2963 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 86% | 57,696 psi | 90% | 2982 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 55,738 psi | 87% | 2943 fps | 98.9% |
| Alliant Reloder-22 | <<locked>> | 98% | 57,450 psi | 90% | 3012 fps | 99.2% |
| Alliant Reloder-23 | <<locked>> | 98% | 54,534 psi | 85% | 2930 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 50,415 psi | 79% | 2927 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 94% | 54,868 psi | 86% | 3022 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 56,101 psi | 88% | 2989 fps | 99% |
| Bofors RP3 | <<locked>> | 82% | 56,115 psi | 88% | 2864 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 46,311 psi | 73% | 2851 fps | 96.7% |
| Bofors RP5 | <<locked>> | 98% | 57,450 psi | 90% | 3012 fps | 99.2% |
| Bofors RP7 | <<locked>> | 86% | 55,129 psi | 86% | 2854 fps | 99.3% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 49,734 psi | 78% | 2871 fps | 97.6% |
| Hodgdon H380 | <<locked>> | 82% | 56,173 psi | 88% | 2884 fps | 100% |
| Hodgdon H414 | <<locked>> | 88% | 57,522 psi | 90% | 2963 fps | 99.8% |
| Hodgdon H4350 | <<locked>> | 86% | 56,753 psi | 89% | 2917 fps | 99.2% |
| Hodgdon H4831 | <<locked>> | 94% | 53,998 psi | 85% | 2890 fps | 97% |
| Hodgdon H4831 SC | <<locked>> | 96% | 56,739 psi | 89% | 2936 fps | 97.5% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 56,623 psi | 89% | 2884 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 49,269 psi | 77% | 2976 fps | 98.8% |
| Hodgdon Superformance | <<locked>> | 86% | 53,911 psi | 84% | 2936 fps | 99.4% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,883 psi | 58% | 1808 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 56,652 psi | 89% | 2854 fps | 100% |
| IMR 4350 | <<locked>> | 90% | 56,231 psi | 88% | 2890 fps | 99.5% |
| IMR 4451 Enduron | <<locked>> | 86% | 56,449 psi | 88% | 2877 fps | 99.7% |
| IMR 4831 | <<locked>> | 90% | 56,072 psi | 88% | 2900 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 55,376 psi | 87% | 2881 fps | 97.4% |
| IMR 7828 SSC | <<locked>> | 98% | 55,419 psi | 87% | 2989 fps | 98% |
| Lovex S062 | <<locked>> | 82% | 57,246 psi | 90% | 2848 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 57,000 psi | 89% | 2877 fps | 100% |
| Lovex S070 | <<locked>> | 88% | 55,143 psi | 86% | 2871 fps | 99.7% |
| Lovex S071ᴾ | <<locked>> | 100% | 51,532 psi | 81% | 2828 fps | 99.7% |
| Norma 204 | <<locked>> | 90% | 57,363 psi | 90% | 2946 fps | 98.9% |
| Norma MRP | <<locked>> | 96% | 57,319 psi | 90% | 3035 fps | 99.8% |
| Norma URP | <<locked>> | 88% | 54,230 psi | 85% | 2890 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 55,898 psi | 88% | 3009 fps | 98.4% |
| Ramshot Hunter | <<locked>> | 90% | 56,579 psi | 89% | 2946 fps | 100% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 53,998 psi | 85% | 2943 fps | 99.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,623 psi | 59% | 1850 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 55,825 psi | 87% | 2867 fps | 99.8% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 57,029 psi | 89% | 2969 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 55,564 psi | 87% | 2930 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 57,566 psi | 90% | 3012 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 49,705 psi | 78% | 2976 fps | 99.6% |
| Rottweil R 903 | <<locked>> | 84% | 56,188 psi | 88% | 2861 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 54,244 psi | 85% | 2867 fps | 97.7% |
| Rottweil R 905 | <<locked>> | 94% | 55,332 psi | 87% | 2933 fps | 98.9% |
| Rottweil R 907 | <<locked>> | 86% | 55,129 psi | 86% | 2854 fps | 99.3% |
| Shooters World Long Rifle | <<locked>> | 88% | 57,000 psi | 89% | 2877 fps | 100% |
| Shooters World Precision | <<locked>> | 82% | 57,246 psi | 90% | 2848 fps | 100% |
| Shooters World SW4350 | <<locked>> | 88% | 55,143 psi | 86% | 2871 fps | 99.7% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 57,609 psi | 90% | 2917 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 56,376 psi | 88% | 2736 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 56,507 psi | 89% | 2831 fps | 99.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 54,882 psi | 86% | 2930 fps | 98.9% |
| Somchem S355 | <<locked>> | 84% | 55,985 psi | 88% | 2854 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 55,811 psi | 87% | 2861 fps | 97.3% |
| Somchem S365 | <<locked>> | 92% | 57,711 psi | 90% | 2943 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 55,724 psi | 87% | 2907 fps | 99.4% |
| Vihtavuori N150 | <<locked>> | 86% | 57,217 psi | 90% | 2828 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 55,941 psi | 88% | 2884 fps | 100% |
| Vihtavuori N165 | <<locked>> | 98% | 55,172 psi | 86% | 2884 fps | 99.2% |
| Vihtavuori N550 | <<locked>> | 88% | 55,317 psi | 87% | 2890 fps | 100% |
| Vihtavuori N555 | <<locked>> | 96% | 57,014 psi | 89% | 2959 fps | 100% |
| Vihtavuori N560 | <<locked>> | 96% | 57,232 psi | 90% | 3028 fps | 97.9% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 52,895 psi | 83% | 2940 fps | 97.3% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 55,564 psi | 87% | 2844 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 57,522 psi | 90% | 2963 fps | 99.8% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 55,027 psi | 86% | 3064 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 55,869 psi | 88% | 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 3100 | <<locked>> | 80% | 31,575 psi | 49% | 2421 fps | 95.2% |
| Accurate 4350 | <<locked>> | 80% | 42,409 psi | 66% | 2684 fps | 99.5% |
| Accurate MAGPRO | <<locked>> | 92% | 48,820 psi | 77% | 2884 fps | 95.4% |
| ADI AR 2208 | <<locked>> | 80% | 50,720 psi | 79% | 2772 fps | 100% |
| ADI AR 2209 | <<locked>> | 84% | 40,625 psi | 64% | 2664 fps | 95.5% |
| ADI AR 2213 | <<locked>> | 90% | 44,179 psi | 69% | 2766 fps | 95.1% |
| ADI AR 2225 | <<locked>> | 96% | 35,302 psi | 55% | 2612 fps | 95.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 51,663 psi | 81% | 2795 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 40,785 psi | 64% | 2687 fps | 99.6% |
| Alliant Reloder-17 | <<locked>> | 80% | 46,775 psi | 73% | 2812 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 84% | 40,437 psi | 63% | 2657 fps | 95.5% |
| Alliant Reloder-22 | <<locked>> | 88% | 41,104 psi | 64% | 2713 fps | 95.9% |
| Alliant Reloder-23 | <<locked>> | 80% | 30,385 psi | 48% | 2454 fps | 98.3% |
| Alliant Reloder-25 | <<locked>> | 84% | 30,269 psi | 47% | 2464 fps | 95% |
| Alliant Reloder-26 | 68.6 gr | 80% | 32,677 psi | 51% | 2572 fps | 97.1% |
| Bofors RP15 | <<locked>> | 90% | 40,712 psi | 64% | 2703 fps | 95.6% |
| Bofors RP3 | <<locked>> | 80% | 52,373 psi | 82% | 2808 fps | 100% |
| Bofors RP30 | <<locked>> | 98% | 43,337 psi | 68% | 2792 fps | 95.8% |
| Bofors RP5 | <<locked>> | 88% | 41,104 psi | 64% | 2713 fps | 95.9% |
| Bofors RP7 | <<locked>> | 80% | 45,745 psi | 72% | 2690 fps | 97.9% |
| Hodgdon H1000 | <<locked>> | 96% | 43,453 psi | 68% | 2746 fps | 95.8% |
| Hodgdon H380 | <<locked>> | 80% | 52,475 psi | 82% | 2825 fps | 100% |
| Hodgdon H414 | <<locked>> | 80% | 44,135 psi | 69% | 2730 fps | 98.1% |
| Hodgdon H4350 | <<locked>> | 80% | 46,746 psi | 73% | 2743 fps | 97.5% |
| Hodgdon H4831 | <<locked>> | 90% | 47,282 psi | 74% | 2776 fps | 95.4% |
| Hodgdon H4831 SC | <<locked>> | 90% | 46,340 psi | 73% | 2756 fps | 95.1% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 38,493 psi | 60% | 2579 fps | 99.8% |
| Hodgdon Retumbo | <<locked>> | 92% | 38,029 psi | 60% | 2717 fps | 95.2% |
| Hodgdon Superformance | <<locked>> | 80% | 43,265 psi | 68% | 2746 fps | 97.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,586 psi | 43% | 1614 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 53,388 psi | 84% | 2805 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 41,205 psi | 65% | 2618 fps | 96.9% |
| IMR 4451 Enduron | <<locked>> | 80% | 47,007 psi | 74% | 2717 fps | 98.5% |
| IMR 4831 | <<locked>> | 80% | 40,509 psi | 63% | 2631 fps | 99.3% |
| IMR 4955 Enduron | <<locked>> | 88% | 46,108 psi | 72% | 2717 fps | 95.3% |
| IMR 7828 SSC | <<locked>> | 92% | 45,194 psi | 71% | 2802 fps | 95.6% |
| Lovex S062 | <<locked>> | 80% | 53,751 psi | 84% | 2795 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 44,744 psi | 70% | 2671 fps | 99.1% |
| Lovex S070 | <<locked>> | 80% | 43,018 psi | 67% | 2654 fps | 98% |
| Lovex S071 | <<locked>> | 86% | 33,054 psi | 52% | 2461 fps | 95.8% |
| Norma 204 | <<locked>> | 80% | 40,872 psi | 64% | 2644 fps | 95.4% |
| Norma MRP | 68.3 gr | 82% | 35,128 psi | 55% | 2602 fps | 95.2% |
| Norma URP | <<locked>> | 80% | 41,916 psi | 66% | 2674 fps | 99.4% |
| Ramshot Grand | <<locked>> | 92% | 45,208 psi | 71% | 2815 fps | 96% |
| Ramshot Hunter | <<locked>> | 80% | 40,582 psi | 64% | 2661 fps | 98.1% |
| Ramshot Magnum | <<locked>> | 90% | 37,550 psi | 59% | 2625 fps | 95.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,152 psi | 44% | 1654 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 52,257 psi | 82% | 2808 fps | 99.6% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 49,617 psi | 78% | 2858 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 42,250 psi | 66% | 2700 fps | 99.3% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 40,582 psi | 64% | 2710 fps | 99% |
| ReloadSwiss RS 76 | <<locked>> | 90% | 34,969 psi | 55% | 2631 fps | 95% |
| Rottweil R 903 | <<locked>> | 80% | 49,559 psi | 78% | 2759 fps | 100% |
| Rottweil R 904 | <<locked>> | 86% | 44,918 psi | 70% | 2700 fps | 95.6% |
| Rottweil R 905 | <<locked>> | 84% | 39,682 psi | 62% | 2641 fps | 95.5% |
| Rottweil R 907 | <<locked>> | 80% | 45,745 psi | 72% | 2690 fps | 97.9% |
| Shooters World Long Rifle | <<locked>> | 80% | 44,744 psi | 70% | 2671 fps | 99.1% |
| Shooters World Precision | <<locked>> | 80% | 53,751 psi | 84% | 2795 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 43,018 psi | 67% | 2654 fps | 98% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 50,531 psi | 79% | 2812 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 49,966 psi | 78% | 2648 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 43,729 psi | 69% | 2615 fps | 98.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 39,334 psi | 62% | 2635 fps | 95.3% |
| Somchem S355 | <<locked>> | 80% | 49,516 psi | 78% | 2756 fps | 100% |
| Somchem S361 | <<locked>> | 88% | 48,936 psi | 77% | 2746 fps | 95.8% |
| Somchem S365 | <<locked>> | 80% | 38,580 psi | 60% | 2631 fps | 100% |
| Somchem S385 | <<locked>> | 82% | 37,913 psi | 59% | 2572 fps | 95.8% |
| Vihtavuori N150 | <<locked>> | 80% | 47,340 psi | 74% | 2680 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 43,134 psi | 68% | 2667 fps | 99.5% |
| Vihtavuori N165 | <<locked>> | 86% | 37,231 psi | 58% | 2549 fps | 95.1% |
| Vihtavuori N550 | <<locked>> | 80% | 42,598 psi | 67% | 2671 fps | 99.4% |
| Vihtavuori N555 | <<locked>> | 80% | 33,924 psi | 53% | 2530 fps | 98.3% |
| Vihtavuori N560 | 75 gr | 90% | 46,615 psi | 73% | 2838 fps | 95.5% |
| Vihtavuori N565 | <<locked>> | 96% | 46,151 psi | 72% | 2818 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 42,177 psi | 66% | 2635 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 44,295 psi | 69% | 2730 fps | 98.2% |
| Winchester StaBALL HD | <<locked>> | 80% | 26,890 psi | 42% | 2441 fps | 97.9% |
| Winchester Supreme 780 | <<locked>> | 86% | 39,581 psi | 62% | 2608 fps | 95.2% |
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 78 powders for .300 Weath. Mag. loaded with the .308 | 180gr | Sellier & Bellot XRG. 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 78 of the 78 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 1:12.0 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 XRG 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.