Load Specifications
Load data in caliber .300 Weath. Mag. with .308 | 180gr | Sierra Pro-Hunter bullet and 74 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Accurate MAGPRO, Alliant Reloder-26 and Ramshot Grand.
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% | 56,855 psi | 89% | 2923 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 54,563 psi | 86% | 2904 fps | 100% |
| Accurate MAGPRO | <<locked>> | 94% | 55,347 psi | 87% | 3012 fps | 97.3% |
| ADI AR 2208 | <<locked>> | 82% | 55,811 psi | 87% | 2864 fps | 100% |
| ADI AR 2209 | <<locked>> | 92% | 55,274 psi | 87% | 2953 fps | 99% |
| ADI AR 2213 | <<locked>> | 96% | 56,840 psi | 89% | 3015 fps | 98.4% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 47,572 psi | 75% | 2844 fps | 96.8% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 42,221 psi | 66% | 2799 fps | 98.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 57,130 psi | 90% | 2887 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 88% | 55,535 psi | 87% | 2959 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 84% | 56,681 psi | 89% | 2976 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 92% | 54,998 psi | 86% | 2946 fps | 99% |
| Alliant Reloder-22 | <<locked>> | 96% | 56,637 psi | 89% | 3009 fps | 99.3% |
| Alliant Reloder-23 | <<locked>> | 98% | 57,696 psi | 90% | 2982 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 53,243 psi | 83% | 2986 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 92% | 54,375 psi | 85% | 3015 fps | 100% |
| Bofors RP15 | <<locked>> | 98% | 55,579 psi | 87% | 2992 fps | 99.1% |
| Bofors RP30ᴾ | <<locked>> | 100% | 49,371 psi | 77% | 2913 fps | 97.6% |
| Bofors RP5 | <<locked>> | 96% | 56,637 psi | 89% | 3009 fps | 99.3% |
| Bofors RP7 | <<locked>> | 86% | 57,246 psi | 90% | 2904 fps | 99.7% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 52,373 psi | 82% | 2936 fps | 98.5% |
| Hodgdon H414 | <<locked>> | 86% | 56,347 psi | 88% | 2956 fps | 99.8% |
| Hodgdon H4350 | <<locked>> | 84% | 55,448 psi | 87% | 2910 fps | 99.2% |
| Hodgdon H4831 | <<locked>> | 94% | 56,768 psi | 89% | 2953 fps | 97.8% |
| Hodgdon H4831 SC | <<locked>> | 94% | 55,651 psi | 87% | 2936 fps | 97.6% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 55,724 psi | 87% | 2881 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 52,156 psi | 82% | 3045 fps | 99.5% |
| Hodgdon Superformance | <<locked>> | 86% | 56,913 psi | 89% | 2995 fps | 99.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,927 psi | 58% | 1827 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 55,172 psi | 86% | 2887 fps | 99.5% |
| IMR 4451 Enduron | <<locked>> | 84% | 55,201 psi | 87% | 2874 fps | 99.7% |
| IMR 4831 | <<locked>> | 88% | 54,955 psi | 86% | 2894 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 54,259 psi | 85% | 2881 fps | 97.6% |
| IMR 7828 SSC | <<locked>> | 96% | 54,621 psi | 86% | 2992 fps | 98.2% |
| Lovex S065 | <<locked>> | 86% | 55,651 psi | 87% | 2871 fps | 100% |
| Lovex S070 | <<locked>> | 88% | 57,392 psi | 90% | 2920 fps | 99.9% |
| Lovex S071ᴾ | <<locked>> | 100% | 54,128 psi | 85% | 2881 fps | 99.9% |
| Norma 204 | <<locked>> | 88% | 56,086 psi | 88% | 2943 fps | 99% |
| Norma 217ᴾ | <<locked>> | 100% | 37,811 psi | 59% | 2717 fps | 96.4% |
| Norma MRP | <<locked>> | 94% | 56,579 psi | 89% | 3035 fps | 99.9% |
| Norma URP | <<locked>> | 88% | 56,695 psi | 89% | 2940 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 55,100 psi | 86% | 3009 fps | 98.6% |
| Ramshot Hunter | <<locked>> | 88% | 55,477 psi | 87% | 2943 fps | 100% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 57,493 psi | 90% | 3005 fps | 99.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,826 psi | 59% | 1873 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 56,043 psi | 88% | 2959 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 54,621 psi | 86% | 2927 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 56,623 psi | 89% | 3009 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 52,837 psi | 83% | 3045 fps | 99.9% |
| Rottweil R 903 | <<locked>> | 82% | 54,926 psi | 86% | 2854 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 56,739 psi | 89% | 2927 fps | 98.4% |
| Rottweil R 905 | <<locked>> | 92% | 54,404 psi | 85% | 2933 fps | 99% |
| Rottweil R 907 | <<locked>> | 86% | 57,246 psi | 90% | 2904 fps | 99.7% |
| Shooters World Long Rifle | <<locked>> | 86% | 55,651 psi | 87% | 2871 fps | 100% |
| Shooters World SW4350 | <<locked>> | 88% | 57,392 psi | 90% | 2920 fps | 99.9% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 56,391 psi | 88% | 2910 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 54,926 psi | 86% | 2730 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 55,100 psi | 86% | 2825 fps | 99.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 57,508 psi | 90% | 2982 fps | 99.4% |
| Somchem S355 | <<locked>> | 82% | 54,520 psi | 85% | 2844 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 54,621 psi | 86% | 2861 fps | 97.4% |
| Somchem S365 | <<locked>> | 90% | 57,101 psi | 89% | 2943 fps | 100% |
| Somchem S385 | <<locked>> | 92% | 54,882 psi | 86% | 2907 fps | 99.5% |
| Vihtavuori N150 | <<locked>> | 84% | 55,898 psi | 88% | 2822 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 54,911 psi | 86% | 2877 fps | 100% |
| Vihtavuori N165 | <<locked>> | 96% | 54,331 psi | 85% | 2884 fps | 99.3% |
| Vihtavuori N550 | <<locked>> | 88% | 57,696 psi | 90% | 2936 fps | 100% |
| Vihtavuori N555 | <<locked>> | 94% | 56,420 psi | 88% | 2959 fps | 100% |
| Vihtavuori N560 | <<locked>> | 94% | 56,420 psi | 88% | 3028 fps | 98% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 56,086 psi | 88% | 3002 fps | 98.2% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 54,331 psi | 85% | 2838 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 56,565 psi | 89% | 2959 fps | 99.8% |
| Winchester StaBALL HD | <<locked>> | 98% | 55,143 psi | 86% | 3064 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 54,694 psi | 86% | 2897 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% | 33,170 psi | 52% | 2470 fps | 96.1% |
| Accurate 4350 | <<locked>> | 80% | 44,570 psi | 70% | 2733 fps | 99.8% |
| Accurate MAGPRO | 80.4 gr | 90% | 47,993 psi | 75% | 2877 fps | 95.5% |
| ADI AR 2208 | <<locked>> | 80% | 52,562 psi | 82% | 2815 fps | 100% |
| ADI AR 2209 | <<locked>> | 82% | 39,769 psi | 62% | 2657 fps | 95.5% |
| ADI AR 2213 | <<locked>> | 88% | 43,352 psi | 68% | 2762 fps | 95.2% |
| ADI AR 2217 | <<locked>> | 98% | 44,425 psi | 70% | 2779 fps | 95.9% |
| ADI AR 2225 | <<locked>> | 94% | 34,896 psi | 55% | 2612 fps | 95.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 53,766 psi | 84% | 2838 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 42,612 psi | 67% | 2736 fps | 99.8% |
| Alliant Reloder-17 | <<locked>> | 80% | 49,255 psi | 77% | 2861 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 82% | 39,624 psi | 62% | 2648 fps | 95.5% |
| Alliant Reloder-22 | <<locked>> | 84% | 37,811 psi | 59% | 2648 fps | 95% |
| Alliant Reloder-23 | <<locked>> | 80% | 31,763 psi | 50% | 2497 fps | 98.9% |
| Alliant Reloder-25 | <<locked>> | 82% | 29,646 psi | 46% | 2454 fps | 95% |
| Alliant Reloder-26 | 72.3 gr | 80% | 34,534 psi | 54% | 2628 fps | 98% |
| Bofors RP15 | <<locked>> | 88% | 40,103 psi | 63% | 2700 fps | 95.7% |
| Bofors RP30 | <<locked>> | 94% | 40,132 psi | 63% | 2730 fps | 95% |
| Bofors RP5 | <<locked>> | 84% | 37,811 psi | 59% | 2648 fps | 95% |
| Bofors RP7 | <<locked>> | 80% | 47,326 psi | 74% | 2736 fps | 98.5% |
| Hodgdon H1000 | <<locked>> | 94% | 42,627 psi | 67% | 2746 fps | 96% |
| Hodgdon H414 | <<locked>> | 80% | 46,093 psi | 72% | 2779 fps | 98.7% |
| Hodgdon H4350 | <<locked>> | 80% | 48,776 psi | 76% | 2795 fps | 98.2% |
| Hodgdon H4831 | <<locked>> | 88% | 46,383 psi | 73% | 2772 fps | 95.5% |
| Hodgdon H4831 SC | <<locked>> | 88% | 45,498 psi | 71% | 2753 fps | 95.2% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 40,277 psi | 63% | 2625 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 90% | 37,536 psi | 59% | 2720 fps | 95.4% |
| Hodgdon Superformance | <<locked>> | 80% | 45,614 psi | 71% | 2799 fps | 98.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,746 psi | 43% | 1637 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 42,859 psi | 67% | 2667 fps | 97.6% |
| IMR 4451 Enduron | <<locked>> | 80% | 48,805 psi | 76% | 2766 fps | 99% |
| IMR 4831 | <<locked>> | 80% | 42,351 psi | 66% | 2677 fps | 99.7% |
| IMR 4955 Enduron | <<locked>> | 86% | 44,991 psi | 71% | 2710 fps | 95.3% |
| IMR 7828 SSC | <<locked>> | 90% | 44,483 psi | 70% | 2799 fps | 95.7% |
| Lovex S065 | <<locked>> | 80% | 46,340 psi | 73% | 2713 fps | 99.5% |
| Lovex S070 | <<locked>> | 80% | 44,570 psi | 70% | 2700 fps | 98.6% |
| Lovex S071 | <<locked>> | 84% | 32,518 psi | 51% | 2454 fps | 95.8% |
| Norma 204 | <<locked>> | 80% | 42,844 psi | 67% | 2703 fps | 96.4% |
| Norma 217 | <<locked>> | 98% | 35,360 psi | 55% | 2654 fps | 95.3% |
| Norma MRP | <<locked>> | 80% | 34,476 psi | 54% | 2592 fps | 95.2% |
| Norma URP | <<locked>> | 80% | 43,656 psi | 68% | 2717 fps | 99.7% |
| Ramshot Grand | 76.6 gr | 88% | 41,394 psi | 65% | 2746 fps | 95.1% |
| Ramshot Hunter | <<locked>> | 80% | 42,583 psi | 67% | 2713 fps | 98.7% |
| Ramshot Magnum | <<locked>> | 88% | 36,912 psi | 58% | 2621 fps | 95.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,297 psi | 44% | 1673 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 52,301 psi | 82% | 2907 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 44,396 psi | 70% | 2753 fps | 99.7% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 42,511 psi | 67% | 2762 fps | 99.5% |
| ReloadSwiss RS 76 | <<locked>> | 88% | 34,301 psi | 54% | 2625 fps | 95.1% |
| Rottweil R 903 | <<locked>> | 80% | 51,430 psi | 81% | 2802 fps | 100% |
| Rottweil R 904 | <<locked>> | 84% | 43,830 psi | 69% | 2694 fps | 95.6% |
| Rottweil R 905 | <<locked>> | 82% | 38,928 psi | 61% | 2635 fps | 95.5% |
| Rottweil R 907 | <<locked>> | 80% | 47,326 psi | 74% | 2736 fps | 98.5% |
| Shooters World Long Rifle | <<locked>> | 80% | 46,340 psi | 73% | 2713 fps | 99.5% |
| Shooters World SW4350 | <<locked>> | 80% | 44,570 psi | 70% | 2700 fps | 98.6% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 52,866 psi | 83% | 2858 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 51,605 psi | 81% | 2684 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 45,310 psi | 71% | 2661 fps | 98.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 82% | 38,609 psi | 61% | 2631 fps | 95.4% |
| Somchem S355 | <<locked>> | 80% | 51,314 psi | 80% | 2795 fps | 100% |
| Somchem S361 | <<locked>> | 84% | 44,730 psi | 70% | 2684 fps | 95% |
| Somchem S365 | <<locked>> | 80% | 40,596 psi | 64% | 2677 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 37,043 psi | 58% | 2562 fps | 95.8% |
| Vihtavuori N150 | <<locked>> | 80% | 49,066 psi | 77% | 2720 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 45,179 psi | 71% | 2717 fps | 99.8% |
| Vihtavuori N165 | <<locked>> | 84% | 36,550 psi | 57% | 2546 fps | 95.2% |
| Vihtavuori N550 | <<locked>> | 80% | 44,469 psi | 70% | 2717 fps | 99.7% |
| Vihtavuori N555 | <<locked>> | 80% | 35,563 psi | 56% | 2575 fps | 98.9% |
| Vihtavuori N560 | <<locked>> | 88% | 45,818 psi | 72% | 2835 fps | 95.6% |
| Vihtavuori N565 | <<locked>> | 94% | 45,701 psi | 72% | 2818 fps | 95.9% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 44,179 psi | 69% | 2680 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 46,296 psi | 73% | 2782 fps | 98.7% |
| Winchester StaBALL HD | <<locked>> | 80% | 28,239 psi | 44% | 2500 fps | 98.8% |
| Winchester Supreme 780 | <<locked>> | 84% | 38,725 psi | 61% | 2598 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 74 powders for .300 Weath. Mag. loaded with the .308 | 180gr | Sierra Pro-Hunter. Winchester StaBALL HD delivers the highest muzzle velocity at 3,064 fps; across all powders the maximum-charge window runs from 1,827 fps to 3,064 fps. ADI AR 2217 gives the best case fill at 100 %, and 74 of the 74 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 1:16.0 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. Accurate MAGPRO, Alliant Reloder-26, Ramshot Grand rank at the top here: for .300 Weath. Mag. with the .308 | 180gr | Sierra Pro-Hunter 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.