Load Specifications
Load data in caliber .300 Weath. Mag. with .308 | 180gr | Norma VULKAN bullet and 75 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Vihtavuori N560, Accurate MAGPRO 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% | 56,202 psi | 88% | 2907 fps | 100% |
| Accurate 4350 | <<locked>> | 88% | 57,653 psi | 90% | 2946 fps | 100% |
| Accurate MAGPRO | <<locked>> | 94% | 54,534 psi | 85% | 2995 fps | 97% |
| ADI AR 2208 | <<locked>> | 82% | 55,303 psi | 87% | 2854 fps | 100% |
| ADI AR 2209 | <<locked>> | 92% | 54,636 psi | 86% | 2940 fps | 98.9% |
| ADI AR 2213 | <<locked>> | 96% | 56,014 psi | 88% | 3002 fps | 98.3% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 46,905 psi | 74% | 2828 fps | 96.6% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 41,785 psi | 65% | 2785 fps | 98.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 56,594 psi | 89% | 2881 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 88% | 54,766 psi | 86% | 2949 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 84% | 55,898 psi | 88% | 2963 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 92% | 54,389 psi | 85% | 2933 fps | 98.9% |
| Alliant Reloder-22 | <<locked>> | 96% | 55,811 psi | 87% | 2995 fps | 99.2% |
| Alliant Reloder-23 | <<locked>> | 98% | 57,029 psi | 89% | 2972 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 52,707 psi | 83% | 2972 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 94% | 57,638 psi | 90% | 3064 fps | 100% |
| Bofors RP15 | <<locked>> | 98% | 54,984 psi | 86% | 2979 fps | 99% |
| Bofors RP30ᴾ | <<locked>> | 100% | 48,573 psi | 76% | 2900 fps | 97.4% |
| Bofors RP5 | <<locked>> | 96% | 55,811 psi | 87% | 2995 fps | 99.2% |
| Bofors RP7 | <<locked>> | 86% | 56,594 psi | 89% | 2894 fps | 99.6% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 51,692 psi | 81% | 2920 fps | 98.3% |
| Hodgdon H414 | <<locked>> | 86% | 55,651 psi | 87% | 2943 fps | 99.8% |
| Hodgdon H4350 | <<locked>> | 84% | 55,013 psi | 86% | 2904 fps | 99.1% |
| Hodgdon H4831 | <<locked>> | 94% | 56,217 psi | 88% | 2940 fps | 97.7% |
| Hodgdon H4831 SC | <<locked>> | 94% | 55,100 psi | 86% | 2923 fps | 97.5% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 54,998 psi | 86% | 2871 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 51,590 psi | 81% | 3031 fps | 99.4% |
| Hodgdon Superformance | <<locked>> | 86% | 56,086 psi | 88% | 2982 fps | 99.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,883 psi | 58% | 1824 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 54,578 psi | 86% | 2874 fps | 99.4% |
| IMR 4451 Enduron | <<locked>> | 84% | 54,737 psi | 86% | 2864 fps | 99.6% |
| IMR 4831 | <<locked>> | 88% | 54,288 psi | 85% | 2884 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 57,290 psi | 90% | 2927 fps | 98% |
| IMR 7828 SSC | <<locked>> | 98% | 57,638 psi | 90% | 3038 fps | 98.6% |
| Lovex S065 | <<locked>> | 86% | 55,172 psi | 86% | 2864 fps | 100% |
| Lovex S070 | <<locked>> | 88% | 56,724 psi | 89% | 2907 fps | 99.9% |
| Lovex S071ᴾ | <<locked>> | 100% | 53,534 psi | 84% | 2871 fps | 99.9% |
| Norma 204 | <<locked>> | 88% | 55,448 psi | 87% | 2930 fps | 98.9% |
| Norma 217ᴾ | <<locked>> | 100% | 37,188 psi | 58% | 2700 fps | 96.1% |
| Norma MRP | <<locked>> | 94% | 55,724 psi | 87% | 3018 fps | 99.8% |
| Norma URP | <<locked>> | 88% | 56,014 psi | 88% | 2927 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 54,505 psi | 85% | 2999 fps | 98.4% |
| Ramshot Hunter | <<locked>> | 88% | 54,882 psi | 86% | 2930 fps | 99.9% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 56,710 psi | 89% | 2992 fps | 99.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,768 psi | 59% | 1870 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 57,493 psi | 90% | 2904 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 55,477 psi | 87% | 2953 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 57,638 psi | 90% | 2969 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 55,956 psi | 88% | 2999 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 51,953 psi | 81% | 3028 fps | 99.9% |
| Rottweil R 903 | <<locked>> | 82% | 54,389 psi | 85% | 2844 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 56,130 psi | 88% | 2913 fps | 98.3% |
| Rottweil R 905 | <<locked>> | 94% | 57,319 psi | 90% | 2976 fps | 99.3% |
| Rottweil R 907 | <<locked>> | 86% | 56,594 psi | 89% | 2894 fps | 99.6% |
| Shooters World Long Rifle | <<locked>> | 86% | 55,172 psi | 86% | 2864 fps | 100% |
| Shooters World SW4350 | <<locked>> | 88% | 56,724 psi | 89% | 2907 fps | 99.9% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 55,883 psi | 88% | 2904 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 54,404 psi | 85% | 2720 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 54,476 psi | 85% | 2815 fps | 99.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 56,869 psi | 89% | 2969 fps | 99.3% |
| Somchem S355 | <<locked>> | 84% | 57,624 psi | 90% | 2887 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 57,696 psi | 90% | 2907 fps | 97.9% |
| Somchem S365 | <<locked>> | 90% | 56,333 psi | 88% | 2930 fps | 100% |
| Somchem S385 | <<locked>> | 92% | 54,288 psi | 85% | 2894 fps | 99.4% |
| Vihtavuori N150 | <<locked>> | 84% | 55,216 psi | 87% | 2808 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 54,418 psi | 85% | 2871 fps | 100% |
| Vihtavuori N165 | <<locked>> | 98% | 57,261 psi | 90% | 2927 fps | 99.5% |
| Vihtavuori N550 | <<locked>> | 88% | 57,058 psi | 89% | 2927 fps | 100% |
| Vihtavuori N555 | <<locked>> | 94% | 55,724 psi | 87% | 2946 fps | 100% |
| Vihtavuori N560 | <<locked>> | 94% | 55,651 psi | 87% | 3012 fps | 97.8% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 55,303 psi | 87% | 2989 fps | 98% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 57,609 psi | 90% | 2881 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 55,869 psi | 88% | 2946 fps | 99.8% |
| Winchester StaBALL HD | <<locked>> | 98% | 54,157 psi | 85% | 3051 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 54,157 psi | 85% | 2887 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% | 32,735 psi | 51% | 2457 fps | 95.9% |
| Accurate 4350 | <<locked>> | 80% | 44,034 psi | 69% | 2720 fps | 99.8% |
| Accurate MAGPRO | 79.6 gr | 90% | 47,413 psi | 74% | 2864 fps | 95.3% |
| ADI AR 2208 | <<locked>> | 80% | 52,040 psi | 82% | 2802 fps | 100% |
| ADI AR 2209 | <<locked>> | 82% | 39,363 psi | 62% | 2644 fps | 95.3% |
| ADI AR 2213 | <<locked>> | 90% | 45,803 psi | 72% | 2812 fps | 95.9% |
| ADI AR 2217 | <<locked>> | 98% | 43,976 psi | 69% | 2766 fps | 95.6% |
| ADI AR 2225 | <<locked>> | 94% | 34,360 psi | 54% | 2595 fps | 95.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 53,243 psi | 83% | 2828 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 42,090 psi | 66% | 2726 fps | 99.8% |
| Alliant Reloder-17 | <<locked>> | 80% | 48,530 psi | 76% | 2848 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 82% | 39,204 psi | 61% | 2638 fps | 95.4% |
| Alliant Reloder-22 | <<locked>> | 86% | 39,885 psi | 63% | 2694 fps | 95.7% |
| Alliant Reloder-23 | <<locked>> | 80% | 31,343 psi | 49% | 2487 fps | 98.8% |
| Alliant Reloder-25 | <<locked>> | 84% | 31,183 psi | 49% | 2500 fps | 95.8% |
| Alliant Reloder-26 | 71.6 gr | 80% | 34,127 psi | 53% | 2615 fps | 97.9% |
| Bofors RP15 | <<locked>> | 88% | 39,537 psi | 62% | 2684 fps | 95.4% |
| Bofors RP30 | <<locked>> | 96% | 42,424 psi | 66% | 2779 fps | 95.7% |
| Bofors RP5 | <<locked>> | 86% | 39,885 psi | 63% | 2694 fps | 95.7% |
| Bofors RP7 | <<locked>> | 80% | 46,891 psi | 73% | 2726 fps | 98.4% |
| Hodgdon H1000 | <<locked>> | 94% | 42,177 psi | 66% | 2733 fps | 95.7% |
| Hodgdon H414 | <<locked>> | 80% | 45,629 psi | 72% | 2769 fps | 98.6% |
| Hodgdon H4350 | <<locked>> | 80% | 48,312 psi | 76% | 2785 fps | 98.1% |
| Hodgdon H4831 | <<locked>> | 88% | 45,818 psi | 72% | 2759 fps | 95.3% |
| Hodgdon H4831 SC | <<locked>> | 88% | 44,904 psi | 70% | 2743 fps | 95% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 39,755 psi | 62% | 2612 fps | 99.9% |
| Hodgdon Retumbo | <<locked>> | 90% | 37,043 psi | 58% | 2700 fps | 95.1% |
| Hodgdon Superformance | <<locked>> | 80% | 44,976 psi | 70% | 2789 fps | 98.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,615 psi | 43% | 1631 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 42,438 psi | 67% | 2654 fps | 97.5% |
| IMR 4451 Enduron | <<locked>> | 80% | 48,341 psi | 76% | 2753 fps | 98.9% |
| IMR 4831 | <<locked>> | 80% | 41,858 psi | 66% | 2667 fps | 99.6% |
| IMR 4955 Enduron | <<locked>> | 86% | 44,599 psi | 70% | 2700 fps | 95.1% |
| IMR 7828 SSC | <<locked>> | 90% | 43,961 psi | 69% | 2785 fps | 95.5% |
| Lovex S065 | <<locked>> | 80% | 45,847 psi | 72% | 2703 fps | 99.4% |
| Lovex S070 | <<locked>> | 80% | 44,092 psi | 69% | 2687 fps | 98.4% |
| Lovex S071 | <<locked>> | 84% | 32,082 psi | 50% | 2441 fps | 95.6% |
| Norma 204 | <<locked>> | 80% | 42,235 psi | 66% | 2687 fps | 96.1% |
| Norma 217 | <<locked>> | 98% | 34,867 psi | 55% | 2638 fps | 95% |
| Norma MRP | <<locked>> | 80% | 34,069 psi | 53% | 2579 fps | 95% |
| Norma URP | <<locked>> | 80% | 43,149 psi | 68% | 2707 fps | 99.6% |
| Ramshot Grand | <<locked>> | 90% | 43,845 psi | 69% | 2795 fps | 95.9% |
| Ramshot Hunter | <<locked>> | 80% | 41,974 psi | 66% | 2700 fps | 98.5% |
| Ramshot Magnum | <<locked>> | 88% | 36,405 psi | 57% | 2608 fps | 95.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,326 psi | 44% | 1670 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 53,737 psi | 84% | 2844 fps | 99.8% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 51,517 psi | 81% | 2894 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 43,947 psi | 69% | 2743 fps | 99.6% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 42,076 psi | 66% | 2753 fps | 99.4% |
| ReloadSwiss RS 76 | <<locked>> | 90% | 36,361 psi | 57% | 2680 fps | 96.1% |
| Rottweil R 903 | <<locked>> | 80% | 50,879 psi | 80% | 2789 fps | 100% |
| Rottweil R 904 | <<locked>> | 84% | 43,410 psi | 68% | 2684 fps | 95.4% |
| Rottweil R 905 | <<locked>> | 82% | 38,493 psi | 60% | 2625 fps | 95.3% |
| Rottweil R 907 | <<locked>> | 80% | 46,891 psi | 73% | 2726 fps | 98.4% |
| Shooters World Long Rifle | <<locked>> | 80% | 45,847 psi | 72% | 2703 fps | 99.4% |
| Shooters World SW4350 | <<locked>> | 80% | 44,092 psi | 69% | 2687 fps | 98.4% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 52,185 psi | 82% | 2844 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 51,314 psi | 80% | 2677 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 44,875 psi | 70% | 2648 fps | 98.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 82% | 38,145 psi | 60% | 2618 fps | 95.1% |
| Somchem S355 | <<locked>> | 80% | 50,821 psi | 80% | 2785 fps | 100% |
| Somchem S361 | <<locked>> | 86% | 47,311 psi | 74% | 2730 fps | 95.7% |
| Somchem S365 | <<locked>> | 80% | 40,059 psi | 63% | 2667 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 36,637 psi | 57% | 2552 fps | 95.6% |
| Vihtavuori N150 | <<locked>> | 80% | 48,559 psi | 76% | 2710 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 44,715 psi | 70% | 2707 fps | 99.8% |
| Vihtavuori N165 | <<locked>> | 84% | 36,187 psi | 57% | 2536 fps | 95% |
| Vihtavuori N550 | <<locked>> | 80% | 44,034 psi | 69% | 2707 fps | 99.6% |
| Vihtavuori N555 | <<locked>> | 80% | 35,244 psi | 55% | 2566 fps | 98.8% |
| Vihtavuori N560 | 76.4 gr | 88% | 45,223 psi | 71% | 2822 fps | 95.4% |
| Vihtavuori N565 | <<locked>> | 94% | 44,947 psi | 70% | 2802 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 43,627 psi | 68% | 2667 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 45,832 psi | 72% | 2769 fps | 98.6% |
| Winchester StaBALL HD | <<locked>> | 80% | 27,804 psi | 44% | 2480 fps | 98.6% |
| Winchester Supreme 780 | <<locked>> | 84% | 38,305 psi | 60% | 2589 fps | 95% |
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 75 powders for .300 Weath. Mag. loaded with the .308 | 180gr | Norma VULKAN. Alliant Reloder-26 delivers the highest muzzle velocity at 3,064 fps; across all powders the maximum-charge window runs from 1,824 fps to 3,064 fps. ADI AR 2217 gives the best case fill at 100 %, and 75 of the 75 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 1:15.0 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. Vihtavuori N560, Accurate MAGPRO, Alliant Reloder-26 rank at the top here: for .300 Weath. Mag. with the .308 | 180gr | Norma VULKAN 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.