Load Specifications
Load data in caliber .300 Weath. Mag. with .308 | 185gr | Lapua D46 bullet and 77 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 Accurate MAGPRO.
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% | 55,941 psi | 88% | 2867 fps | 100% |
| Accurate 4350 | <<locked>> | 88% | 57,537 psi | 90% | 2907 fps | 100% |
| Accurate MAGPRO | <<locked>> | 94% | 54,389 psi | 85% | 2956 fps | 97.2% |
| ADI AR 2208 | <<locked>> | 82% | 55,347 psi | 87% | 2815 fps | 100% |
| ADI AR 2209 | <<locked>> | 92% | 54,650 psi | 86% | 2904 fps | 99% |
| ADI AR 2213 | <<locked>> | 96% | 56,028 psi | 88% | 2963 fps | 98.4% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 46,818 psi | 73% | 2792 fps | 96.8% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 41,539 psi | 65% | 2746 fps | 98.4% |
| Alliant Power Pro Varmint | <<locked>> | 92% | 54,911 psi | 86% | 2900 fps | 99% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 56,666 psi | 89% | 2838 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 88% | 54,810 psi | 86% | 2910 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 84% | 55,811 psi | 87% | 2923 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 57,711 psi | 90% | 2949 fps | 99.4% |
| Alliant Reloder-22 | <<locked>> | 96% | 55,796 psi | 87% | 2956 fps | 99.3% |
| Alliant Reloder-23 | <<locked>> | 98% | 56,753 psi | 89% | 2930 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 52,562 psi | 82% | 2936 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 94% | 57,522 psi | 90% | 3025 fps | 100% |
| Bofors RP15 | <<locked>> | 98% | 54,737 psi | 86% | 2940 fps | 99.1% |
| Bofors RP30ᴾ | <<locked>> | 100% | 48,428 psi | 76% | 2864 fps | 97.6% |
| Bofors RP5 | <<locked>> | 96% | 55,796 psi | 87% | 2956 fps | 99.3% |
| Bofors RP7 | <<locked>> | 86% | 56,565 psi | 89% | 2851 fps | 99.7% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 51,605 psi | 81% | 2884 fps | 98.4% |
| Hodgdon H380 | <<locked>> | 82% | 57,696 psi | 90% | 2877 fps | 100% |
| Hodgdon H414 | <<locked>> | 86% | 55,550 psi | 87% | 2904 fps | 99.8% |
| Hodgdon H4350 | <<locked>> | 84% | 54,824 psi | 86% | 2861 fps | 99.2% |
| Hodgdon H4831 | <<locked>> | 94% | 55,912 psi | 88% | 2900 fps | 97.8% |
| Hodgdon H4831 SC | <<locked>> | 94% | 54,824 psi | 86% | 2884 fps | 97.6% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 55,129 psi | 86% | 2835 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 51,285 psi | 80% | 2992 fps | 99.5% |
| Hodgdon Superformance | <<locked>> | 86% | 55,970 psi | 88% | 2943 fps | 99.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,912 psi | 58% | 1795 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 54,447 psi | 85% | 2835 fps | 99.5% |
| IMR 4451 Enduron | <<locked>> | 84% | 54,679 psi | 86% | 2825 fps | 99.7% |
| IMR 4831 | <<locked>> | 88% | 54,389 psi | 85% | 2844 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 57,159 psi | 90% | 2887 fps | 98.1% |
| IMR 7828 SSC | <<locked>> | 98% | 57,464 psi | 90% | 2995 fps | 98.7% |
| Lovex S065 | <<locked>> | 86% | 55,187 psi | 86% | 2822 fps | 100% |
| Lovex S070 | <<locked>> | 88% | 56,797 psi | 89% | 2871 fps | 99.9% |
| Lovex S071ᴾ | <<locked>> | 100% | 53,447 psi | 84% | 2831 fps | 99.9% |
| Norma 204 | <<locked>> | 88% | 55,463 psi | 87% | 2890 fps | 99% |
| Norma 217ᴾ | <<locked>> | 100% | 37,217 psi | 58% | 2671 fps | 96.4% |
| Norma MRP | <<locked>> | 94% | 55,492 psi | 87% | 2979 fps | 99.8% |
| Norma URP | <<locked>> | 88% | 56,086 psi | 88% | 2890 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 54,360 psi | 85% | 2956 fps | 98.5% |
| Ramshot Hunter | <<locked>> | 88% | 54,868 psi | 86% | 2894 fps | 100% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 56,550 psi | 89% | 2953 fps | 99.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,826 psi | 59% | 1837 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 57,319 psi | 90% | 2864 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 55,274 psi | 87% | 2910 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 57,696 psi | 90% | 2933 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 55,825 psi | 87% | 2959 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 51,895 psi | 81% | 2992 fps | 99.9% |
| Rottweil R 903 | <<locked>> | 82% | 54,259 psi | 85% | 2802 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 55,912 psi | 88% | 2871 fps | 98.4% |
| Rottweil R 905 | <<locked>> | 94% | 57,174 psi | 90% | 2936 fps | 99.4% |
| Rottweil R 907 | <<locked>> | 86% | 56,565 psi | 89% | 2851 fps | 99.7% |
| Shooters World Long Rifle | <<locked>> | 86% | 55,187 psi | 86% | 2822 fps | 100% |
| Shooters World SW4350 | <<locked>> | 88% | 56,797 psi | 89% | 2871 fps | 99.9% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 55,651 psi | 87% | 2861 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 54,375 psi | 85% | 2680 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 54,534 psi | 85% | 2779 fps | 99.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 56,710 psi | 89% | 2930 fps | 99.3% |
| Somchem S355 | <<locked>> | 84% | 57,522 psi | 90% | 2848 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 57,711 psi | 90% | 2867 fps | 98% |
| Somchem S365 | <<locked>> | 90% | 56,289 psi | 88% | 2894 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 57,682 psi | 90% | 2910 fps | 99.8% |
| Vihtavuori N150 | <<locked>> | 84% | 55,158 psi | 86% | 2772 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 54,273 psi | 85% | 2831 fps | 100% |
| Vihtavuori N165 | <<locked>> | 98% | 57,305 psi | 90% | 2890 fps | 99.6% |
| Vihtavuori N550 | <<locked>> | 88% | 57,029 psi | 89% | 2887 fps | 100% |
| Vihtavuori N555 | <<locked>> | 94% | 55,564 psi | 87% | 2907 fps | 100% |
| Vihtavuori N560 | <<locked>> | 94% | 55,434 psi | 87% | 2972 fps | 98% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 55,056 psi | 86% | 2949 fps | 98.1% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 57,479 psi | 90% | 2841 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 55,767 psi | 87% | 2907 fps | 99.8% |
| Winchester StaBALL HD | <<locked>> | 98% | 54,056 psi | 85% | 3012 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 54,099 psi | 85% | 2851 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% | 32,619 psi | 51% | 2425 fps | 96.1% |
| Accurate 4350 | <<locked>> | 80% | 43,903 psi | 69% | 2684 fps | 99.8% |
| Accurate MAGPRO | 77.9 gr | 90% | 47,326 psi | 74% | 2828 fps | 95.5% |
| ADI AR 2208 | <<locked>> | 80% | 52,011 psi | 82% | 2766 fps | 100% |
| ADI AR 2209 | <<locked>> | 82% | 39,262 psi | 62% | 2612 fps | 95.5% |
| ADI AR 2213 | <<locked>> | 88% | 42,743 psi | 67% | 2713 fps | 95.2% |
| ADI AR 2217 | <<locked>> | 98% | 43,787 psi | 69% | 2730 fps | 95.8% |
| ADI AR 2225 | <<locked>> | 94% | 34,258 psi | 54% | 2562 fps | 95.6% |
| Alliant Power Pro Varmint | <<locked>> | 82% | 39,711 psi | 62% | 2618 fps | 95.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 53,229 psi | 83% | 2789 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 42,076 psi | 66% | 2690 fps | 99.9% |
| Alliant Reloder-17 | <<locked>> | 80% | 48,486 psi | 76% | 2812 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 82% | 39,117 psi | 61% | 2605 fps | 95.6% |
| Alliant Reloder-22 | <<locked>> | 84% | 37,231 psi | 58% | 2602 fps | 95% |
| Alliant Reloder-23 | <<locked>> | 80% | 31,328 psi | 49% | 2454 fps | 99% |
| Alliant Reloder-25 | <<locked>> | 82% | 29,269 psi | 46% | 2415 fps | 95% |
| Alliant Reloder-26 | <<locked>> | 80% | 33,997 psi | 53% | 2582 fps | 98% |
| Bofors RP15 | <<locked>> | 88% | 39,581 psi | 62% | 2651 fps | 95.7% |
| Bofors RP30 | <<locked>> | 96% | 42,192 psi | 66% | 2743 fps | 95.9% |
| Bofors RP5 | <<locked>> | 84% | 37,231 psi | 58% | 2602 fps | 95% |
| Bofors RP7 | <<locked>> | 80% | 46,862 psi | 73% | 2687 fps | 98.5% |
| Hodgdon H1000 | <<locked>> | 94% | 42,105 psi | 66% | 2697 fps | 96% |
| Hodgdon H380 | <<locked>> | 80% | 53,983 psi | 85% | 2822 fps | 100% |
| Hodgdon H414 | <<locked>> | 80% | 45,571 psi | 71% | 2730 fps | 98.7% |
| Hodgdon H4350 | <<locked>> | 80% | 48,196 psi | 76% | 2746 fps | 98.2% |
| Hodgdon H4831 | <<locked>> | 88% | 45,774 psi | 72% | 2723 fps | 95.5% |
| Hodgdon H4831 SC | <<locked>> | 88% | 44,846 psi | 70% | 2707 fps | 95.2% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 39,726 psi | 62% | 2579 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 90% | 37,014 psi | 58% | 2671 fps | 95.4% |
| Hodgdon Superformance | <<locked>> | 80% | 44,904 psi | 70% | 2753 fps | 98.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,601 psi | 43% | 1601 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 42,482 psi | 67% | 2621 fps | 97.7% |
| IMR 4451 Enduron | <<locked>> | 80% | 48,182 psi | 76% | 2713 fps | 99% |
| IMR 4831 | <<locked>> | 80% | 41,872 psi | 66% | 2631 fps | 99.7% |
| IMR 4955 Enduron | <<locked>> | 86% | 44,483 psi | 70% | 2664 fps | 95.3% |
| IMR 7828 SSC | <<locked>> | 90% | 43,932 psi | 69% | 2753 fps | 95.7% |
| Lovex S065 | <<locked>> | 80% | 45,861 psi | 72% | 2667 fps | 99.5% |
| Lovex S070 | <<locked>> | 80% | 44,135 psi | 69% | 2654 fps | 98.6% |
| Lovex S071 | <<locked>> | 84% | 32,097 psi | 50% | 2411 fps | 95.9% |
| Norma 204 | <<locked>> | 80% | 42,177 psi | 66% | 2651 fps | 96.3% |
| Norma 217 | <<locked>> | 98% | 34,838 psi | 55% | 2612 fps | 95.3% |
| Norma MRP | 68 gr | 80% | 33,997 psi | 53% | 2549 fps | 95.2% |
| Norma URP | <<locked>> | 80% | 43,163 psi | 68% | 2671 fps | 99.7% |
| Ramshot Grand | <<locked>> | 88% | 40,698 psi | 64% | 2697 fps | 95% |
| Ramshot Hunter | <<locked>> | 80% | 41,945 psi | 66% | 2664 fps | 98.7% |
| Ramshot Magnum | <<locked>> | 88% | 36,318 psi | 57% | 2575 fps | 95.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,326 psi | 44% | 1644 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 53,693 psi | 84% | 2808 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 51,445 psi | 81% | 2854 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 43,729 psi | 69% | 2703 fps | 99.7% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 42,076 psi | 66% | 2717 fps | 99.5% |
| ReloadSwiss RS 76 | <<locked>> | 88% | 33,823 psi | 53% | 2582 fps | 95.1% |
| Rottweil R 903 | <<locked>> | 80% | 50,879 psi | 80% | 2753 fps | 100% |
| Rottweil R 904 | <<locked>> | 84% | 43,366 psi | 68% | 2648 fps | 95.6% |
| Rottweil R 905 | <<locked>> | 82% | 38,392 psi | 60% | 2589 fps | 95.5% |
| Rottweil R 907 | <<locked>> | 80% | 46,862 psi | 73% | 2687 fps | 98.5% |
| Shooters World Long Rifle | <<locked>> | 80% | 45,861 psi | 72% | 2667 fps | 99.5% |
| Shooters World SW4350 | <<locked>> | 80% | 44,135 psi | 69% | 2654 fps | 98.6% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 52,112 psi | 82% | 2805 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 51,213 psi | 80% | 2638 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 44,889 psi | 70% | 2615 fps | 98.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 82% | 38,058 psi | 60% | 2582 fps | 95.4% |
| Somchem S355 | <<locked>> | 80% | 50,778 psi | 80% | 2746 fps | 100% |
| Somchem S361 | <<locked>> | 84% | 44,193 psi | 69% | 2638 fps | 95% |
| Somchem S365 | <<locked>> | 80% | 40,074 psi | 63% | 2631 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 36,550 psi | 57% | 2516 fps | 95.8% |
| Vihtavuori N150 | <<locked>> | 80% | 48,602 psi | 76% | 2674 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 44,585 psi | 70% | 2667 fps | 99.8% |
| Vihtavuori N165 | <<locked>> | 84% | 36,143 psi | 57% | 2503 fps | 95.3% |
| Vihtavuori N550 | <<locked>> | 80% | 43,918 psi | 69% | 2671 fps | 99.7% |
| Vihtavuori N555 | <<locked>> | 80% | 35,070 psi | 55% | 2530 fps | 98.9% |
| Vihtavuori N560 | 74.7 gr | 88% | 45,049 psi | 71% | 2785 fps | 95.6% |
| Vihtavuori N565 | <<locked>> | 94% | 44,918 psi | 70% | 2769 fps | 95.8% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 43,642 psi | 68% | 2635 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 45,745 psi | 72% | 2733 fps | 98.8% |
| Winchester StaBALL HD | <<locked>> | 80% | 27,760 psi | 44% | 2454 fps | 98.8% |
| Winchester Supreme 780 | <<locked>> | 84% | 38,203 psi | 60% | 2556 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 77 powders for .300 Weath. Mag. loaded with the .308 | 185gr | Lapua D46. Alliant Reloder-26 delivers the highest muzzle velocity at 3,025 fps; across all powders the maximum-charge window runs from 1,795 fps to 3,025 fps. ADI AR 2217 gives the best case fill at 100 %, and 77 of the 77 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 185.0 gr projectile in 0.308" calls for a 1:12.5 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. Norma MRP, Vihtavuori N560, Accurate MAGPRO rank at the top here: for .300 Weath. Mag. with the .308 | 185gr | Lapua D46 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.