Load Specifications
Load data in caliber .300 Weath. Mag. with .308 | 180gr | Woodleigh HS bullet and 79 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 3100 | <<locked>> | 96% | 54,665 psi | 86% | 2881 fps | 99.9% |
| Accurate 4350 | <<locked>> | 88% | 56,347 psi | 88% | 2923 fps | 100% |
| Accurate MAGPRO | <<locked>> | 96% | 56,927 psi | 89% | 3031 fps | 97.4% |
| ADI AR 2208 | <<locked>> | 84% | 57,725 psi | 90% | 2884 fps | 100% |
| ADI AR 2209 | <<locked>> | 94% | 56,956 psi | 89% | 2972 fps | 99.1% |
| ADI AR 2213 | <<locked>> | 96% | 54,607 psi | 86% | 2969 fps | 97.9% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 40,596 psi | 64% | 2753 fps | 97.8% |
| Alliant Power Pro Varmint | <<locked>> | 94% | 57,319 psi | 90% | 2972 fps | 99.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 55,477 psi | 87% | 2858 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 90% | 57,043 psi | 89% | 2979 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 84% | 54,549 psi | 85% | 2940 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 56,565 psi | 89% | 2963 fps | 99.1% |
| Alliant Reloder-22 | <<locked>> | 96% | 54,346 psi | 85% | 2966 fps | 98.9% |
| Alliant Reloder-23 | <<locked>> | 98% | 55,390 psi | 87% | 2949 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 51,082 psi | 80% | 2943 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 94% | 55,724 psi | 87% | 3035 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 57,116 psi | 90% | 3012 fps | 99.2% |
| Bofors RP3 | <<locked>> | 82% | 56,463 psi | 88% | 2874 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 46,934 psi | 74% | 2867 fps | 96.9% |
| Bofors RP5 | <<locked>> | 96% | 54,346 psi | 85% | 2966 fps | 98.9% |
| Bofors RP7 | <<locked>> | 86% | 55,637 psi | 87% | 2871 fps | 99.4% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 50,270 psi | 79% | 2887 fps | 97.8% |
| Hodgdon H380 | <<locked>> | 82% | 56,492 psi | 89% | 2894 fps | 100% |
| Hodgdon H414 | <<locked>> | 86% | 54,476 psi | 85% | 2920 fps | 99.6% |
| Hodgdon H4350 | <<locked>> | 86% | 57,276 psi | 90% | 2933 fps | 99.3% |
| Hodgdon H4831 | <<locked>> | 94% | 54,795 psi | 86% | 2913 fps | 97.3% |
| Hodgdon H4831 SC | <<locked>> | 96% | 57,334 psi | 90% | 2953 fps | 97.7% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 57,363 psi | 90% | 2900 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 50,111 psi | 79% | 2999 fps | 99.1% |
| Hodgdon Superformance | <<locked>> | 86% | 54,766 psi | 86% | 2956 fps | 99.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,869 psi | 58% | 1814 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 57,116 psi | 90% | 2867 fps | 100% |
| IMR 4350 | <<locked>> | 90% | 56,869 psi | 89% | 2907 fps | 99.6% |
| IMR 4451 Enduron | <<locked>> | 86% | 56,985 psi | 89% | 2894 fps | 99.7% |
| IMR 4831 | <<locked>> | 90% | 56,521 psi | 89% | 2910 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 55,956 psi | 88% | 2897 fps | 97.6% |
| IMR 7828 SSC | <<locked>> | 98% | 56,173 psi | 88% | 3009 fps | 98.2% |
| Lovex S062 | <<locked>> | 82% | 57,653 psi | 90% | 2861 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 57,435 psi | 90% | 2890 fps | 100% |
| Lovex S070 | <<locked>> | 88% | 55,579 psi | 87% | 2884 fps | 99.8% |
| Lovex S071ᴾ | <<locked>> | 100% | 52,040 psi | 82% | 2844 fps | 99.8% |
| Norma 204 | <<locked>> | 88% | 54,157 psi | 85% | 2904 fps | 98.6% |
| Norma MRP | <<locked>> | 94% | 54,143 psi | 85% | 2992 fps | 99.6% |
| Norma URP | <<locked>> | 88% | 54,737 psi | 86% | 2907 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 56,869 psi | 89% | 3028 fps | 98.7% |
| Ramshot Hunter | <<locked>> | 90% | 57,232 psi | 90% | 2963 fps | 100% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 54,839 psi | 86% | 2959 fps | 99.5% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,579 psi | 59% | 1857 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 56,347 psi | 88% | 2881 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 54,012 psi | 85% | 2930 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 56,246 psi | 88% | 2943 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 54,375 psi | 85% | 2969 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 50,401 psi | 79% | 2995 fps | 99.7% |
| Rottweil R 903 | <<locked>> | 84% | 56,739 psi | 89% | 2874 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 54,882 psi | 86% | 2887 fps | 97.9% |
| Rottweil R 905 | <<locked>> | 94% | 55,970 psi | 88% | 2949 fps | 99.1% |
| Rottweil R 907 | <<locked>> | 86% | 55,637 psi | 87% | 2871 fps | 99.4% |
| Shooters World Long Rifle | <<locked>> | 88% | 57,435 psi | 90% | 2890 fps | 100% |
| Shooters World Precision | <<locked>> | 82% | 57,653 psi | 90% | 2861 fps | 100% |
| Shooters World SW4350 | <<locked>> | 88% | 55,579 psi | 87% | 2884 fps | 99.8% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 54,621 psi | 86% | 2881 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 56,797 psi | 89% | 2746 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 56,884 psi | 89% | 2844 fps | 99.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 55,506 psi | 87% | 2946 fps | 99% |
| Somchem S355 | <<locked>> | 84% | 56,318 psi | 88% | 2864 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 56,434 psi | 88% | 2881 fps | 97.5% |
| Somchem S365 | <<locked>> | 90% | 54,781 psi | 86% | 2907 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 56,492 psi | 89% | 2923 fps | 99.5% |
| Vihtavuori N150 | <<locked>> | 86% | 57,725 psi | 90% | 2838 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 56,739 psi | 89% | 2897 fps | 100% |
| Vihtavuori N165 | <<locked>> | 98% | 55,912 psi | 88% | 2900 fps | 99.3% |
| Vihtavuori N550 | <<locked>> | 88% | 55,709 psi | 87% | 2904 fps | 100% |
| Vihtavuori N555 | <<locked>> | 94% | 54,273 psi | 85% | 2923 fps | 100% |
| Vihtavuori N560 | <<locked>> | 94% | 54,157 psi | 85% | 2982 fps | 97.4% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 53,490 psi | 84% | 2956 fps | 97.6% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 56,159 psi | 88% | 2858 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 54,694 psi | 86% | 2923 fps | 99.7% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 56,260 psi | 88% | 3081 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 56,623 psi | 89% | 2920 fps | 99% |
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% | 31,821 psi | 50% | 2431 fps | 95.4% |
| Accurate 4350 | <<locked>> | 80% | 42,917 psi | 67% | 2697 fps | 99.6% |
| Accurate MAGPRO | <<locked>> | 92% | 49,342 psi | 77% | 2897 fps | 95.7% |
| ADI AR 2208 | <<locked>> | 80% | 51,155 psi | 80% | 2782 fps | 100% |
| ADI AR 2209 | <<locked>> | 84% | 41,075 psi | 64% | 2677 fps | 95.7% |
| ADI AR 2213 | <<locked>> | 90% | 44,686 psi | 70% | 2782 fps | 95.4% |
| ADI AR 2225 | <<locked>> | 96% | 35,679 psi | 56% | 2625 fps | 95.8% |
| Alliant Power Pro Varmint | <<locked>> | 82% | 38,696 psi | 61% | 2621 fps | 95% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 52,127 psi | 82% | 2808 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 41,220 psi | 65% | 2703 fps | 99.7% |
| Alliant Reloder-17 | <<locked>> | 80% | 47,398 psi | 74% | 2828 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 84% | 40,857 psi | 64% | 2671 fps | 95.8% |
| Alliant Reloder-22 | <<locked>> | 86% | 38,856 psi | 61% | 2667 fps | 95.2% |
| Alliant Reloder-23 | <<locked>> | 80% | 30,603 psi | 48% | 2464 fps | 98.5% |
| Alliant Reloder-25 | <<locked>> | 84% | 30,501 psi | 48% | 2477 fps | 95.3% |
| Alliant Reloder-26 | 70 gr | 80% | 33,098 psi | 52% | 2589 fps | 97.4% |
| Bofors RP15 | <<locked>> | 90% | 41,075 psi | 64% | 2713 fps | 95.8% |
| Bofors RP3 | <<locked>> | 80% | 52,968 psi | 83% | 2822 fps | 100% |
| Bofors RP30 | <<locked>> | 96% | 41,118 psi | 64% | 2746 fps | 95.1% |
| Bofors RP5 | <<locked>> | 86% | 38,856 psi | 61% | 2667 fps | 95.2% |
| Bofors RP7 | <<locked>> | 80% | 46,079 psi | 72% | 2703 fps | 98.1% |
| Hodgdon H1000 | <<locked>> | 94% | 41,031 psi | 64% | 2700 fps | 95.1% |
| Hodgdon H380 | <<locked>> | 80% | 53,011 psi | 83% | 2838 fps | 100% |
| Hodgdon H414 | <<locked>> | 80% | 44,628 psi | 70% | 2743 fps | 98.3% |
| Hodgdon H4350 | <<locked>> | 80% | 47,311 psi | 74% | 2762 fps | 97.8% |
| Hodgdon H4831 | <<locked>> | 90% | 47,877 psi | 75% | 2792 fps | 95.7% |
| Hodgdon H4831 SC | <<locked>> | 90% | 46,905 psi | 74% | 2772 fps | 95.4% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 38,711 psi | 61% | 2589 fps | 99.9% |
| Hodgdon Retumbo | <<locked>> | 92% | 38,406 psi | 60% | 2733 fps | 95.6% |
| Hodgdon Superformance | <<locked>> | 80% | 43,671 psi | 68% | 2759 fps | 97.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,557 psi | 43% | 1621 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 53,853 psi | 84% | 2818 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 41,510 psi | 65% | 2631 fps | 97.1% |
| IMR 4451 Enduron | <<locked>> | 80% | 47,413 psi | 74% | 2733 fps | 98.7% |
| IMR 4831 | <<locked>> | 80% | 40,814 psi | 64% | 2641 fps | 99.4% |
| IMR 4955 Enduron | <<locked>> | 88% | 46,485 psi | 73% | 2733 fps | 95.5% |
| IMR 7828 SSC | <<locked>> | 92% | 45,919 psi | 72% | 2822 fps | 95.9% |
| Lovex S062 | <<locked>> | 80% | 54,186 psi | 85% | 2808 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 45,034 psi | 71% | 2680 fps | 99.2% |
| Lovex S070 | <<locked>> | 80% | 43,308 psi | 68% | 2667 fps | 98.2% |
| Lovex S071 | <<locked>> | 84% | 31,183 psi | 49% | 2415 fps | 95.1% |
| Norma 204 | <<locked>> | 80% | 41,321 psi | 65% | 2661 fps | 95.7% |
| Norma MRP | 69.6 gr | 82% | 35,462 psi | 56% | 2615 fps | 95.5% |
| Norma URP | <<locked>> | 80% | 42,264 psi | 66% | 2687 fps | 99.5% |
| Ramshot Grand | <<locked>> | 90% | 42,714 psi | 67% | 2769 fps | 95.3% |
| Ramshot Hunter | <<locked>> | 80% | 41,046 psi | 64% | 2674 fps | 98.2% |
| Ramshot Magnum | <<locked>> | 90% | 38,058 psi | 60% | 2641 fps | 95.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,253 psi | 44% | 1663 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 52,794 psi | 83% | 2825 fps | 99.7% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 50,285 psi | 79% | 2874 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 42,714 psi | 67% | 2713 fps | 99.5% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 41,002 psi | 64% | 2723 fps | 99.2% |
| ReloadSwiss RS 76 | <<locked>> | 90% | 35,346 psi | 55% | 2648 fps | 95.4% |
| Rottweil R 903 | <<locked>> | 80% | 49,937 psi | 78% | 2772 fps | 100% |
| Rottweil R 904 | <<locked>> | 84% | 42,525 psi | 67% | 2661 fps | 95% |
| Rottweil R 905 | <<locked>> | 84% | 40,118 psi | 63% | 2654 fps | 95.7% |
| Rottweil R 907 | <<locked>> | 80% | 46,079 psi | 72% | 2703 fps | 98.1% |
| Shooters World Long Rifle | <<locked>> | 80% | 45,034 psi | 71% | 2680 fps | 99.2% |
| Shooters World Precision | <<locked>> | 80% | 54,186 psi | 85% | 2808 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 43,308 psi | 68% | 2667 fps | 98.2% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 51,126 psi | 80% | 2825 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 50,212 psi | 79% | 2657 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 43,990 psi | 69% | 2628 fps | 98.2% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 39,769 psi | 62% | 2651 fps | 95.6% |
| Somchem S355 | <<locked>> | 80% | 49,908 psi | 78% | 2769 fps | 100% |
| Somchem S361 | <<locked>> | 86% | 46,282 psi | 73% | 2703 fps | 95.2% |
| Somchem S365 | <<locked>> | 80% | 38,943 psi | 61% | 2641 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 35,737 psi | 56% | 2526 fps | 95.1% |
| Vihtavuori N150 | <<locked>> | 80% | 47,703 psi | 75% | 2694 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 43,685 psi | 68% | 2684 fps | 99.6% |
| Vihtavuori N165 | <<locked>> | 86% | 37,739 psi | 59% | 2569 fps | 95.4% |
| Vihtavuori N550 | <<locked>> | 80% | 43,076 psi | 68% | 2684 fps | 99.5% |
| Vihtavuori N555 | <<locked>> | 80% | 34,214 psi | 54% | 2539 fps | 98.4% |
| Vihtavuori N560 | 76.4 gr | 90% | 47,123 psi | 74% | 2858 fps | 95.8% |
| Vihtavuori N565 | <<locked>> | 94% | 43,627 psi | 68% | 2769 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 42,569 psi | 67% | 2644 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 44,628 psi | 70% | 2743 fps | 98.3% |
| Winchester StaBALL HD | <<locked>> | 80% | 27,093 psi | 42% | 2454 fps | 98.1% |
| Winchester Supreme 780 | <<locked>> | 86% | 39,929 psi | 63% | 2621 fps | 95.5% |
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 79 powders for .300 Weath. Mag. loaded with the .308 | 180gr | Woodleigh HS. Winchester StaBALL HD delivers the highest muzzle velocity at 3,081 fps; across all powders the maximum-charge window runs from 1,814 fps to 3,081 fps. ADI AR 2225 gives the best case fill at 100 %, and 79 of the 79 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 1:13.5 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. Norma MRP, Vihtavuori N560, Alliant Reloder-26 rank at the top here: for .300 Weath. Mag. with the .308 | 180gr | Woodleigh HS 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.