Load Specifications
Load data in caliber .300 Weath. Mag. with .308 | 180gr | Prvi Partizan SP bullet and 78 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 ADI AR 2213.
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% | 55,303 psi | 87% | 2894 fps | 100% |
| Accurate 4350 | <<locked>> | 88% | 56,869 psi | 89% | 2933 fps | 100% |
| Accurate MAGPRO | <<locked>> | 94% | 53,708 psi | 84% | 2979 fps | 96.8% |
| ADI AR 2208 | <<locked>> | 82% | 54,781 psi | 86% | 2844 fps | 100% |
| ADI AR 2209 | <<locked>> | 94% | 57,624 psi | 90% | 2986 fps | 99.2% |
| ADI AR 2213 | <<locked>> | 96% | 55,434 psi | 87% | 2989 fps | 98.1% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 46,267 psi | 73% | 2812 fps | 96.3% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 41,031 psi | 64% | 2762 fps | 98% |
| Alliant Power Pro Varmint | <<locked>> | 92% | 54,201 psi | 85% | 2923 fps | 98.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 56,043 psi | 88% | 2867 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 90% | 57,580 psi | 90% | 2986 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 84% | 55,114 psi | 86% | 2949 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 57,203 psi | 90% | 2976 fps | 99.2% |
| Alliant Reloder-22 | <<locked>> | 96% | 55,187 psi | 86% | 2982 fps | 99.1% |
| Alliant Reloder-23 | <<locked>> | 98% | 56,115 psi | 88% | 2956 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 51,648 psi | 81% | 2956 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 94% | 56,695 psi | 89% | 3051 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 57,696 psi | 90% | 3022 fps | 99.3% |
| Bofors RP3 | <<locked>> | 82% | 57,014 psi | 89% | 2884 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 47,761 psi | 75% | 2884 fps | 97.2% |
| Bofors RP5 | <<locked>> | 96% | 55,187 psi | 86% | 2982 fps | 99.1% |
| Bofors RP7 | <<locked>> | 86% | 56,101 psi | 88% | 2881 fps | 99.5% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 51,010 psi | 80% | 2907 fps | 98.1% |
| Hodgdon H380 | <<locked>> | 82% | 57,232 psi | 90% | 2907 fps | 100% |
| Hodgdon H414 | <<locked>> | 86% | 54,940 psi | 86% | 2930 fps | 99.7% |
| Hodgdon H4350 | <<locked>> | 84% | 54,302 psi | 85% | 2887 fps | 99% |
| Hodgdon H4831 | <<locked>> | 94% | 55,390 psi | 87% | 2927 fps | 97.4% |
| Hodgdon H4831 SC | <<locked>> | 94% | 54,273 psi | 85% | 2907 fps | 97.2% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 54,476 psi | 85% | 2861 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 50,647 psi | 79% | 3012 fps | 99.2% |
| Hodgdon Superformance | <<locked>> | 86% | 55,405 psi | 87% | 2966 fps | 99.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,912 psi | 58% | 1821 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 57,682 psi | 90% | 2877 fps | 100% |
| IMR 4350 | <<locked>> | 90% | 57,537 psi | 90% | 2920 fps | 99.7% |
| IMR 4451 Enduron | <<locked>> | 86% | 57,435 psi | 90% | 2904 fps | 99.8% |
| IMR 4831 | <<locked>> | 90% | 57,246 psi | 90% | 2923 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 56,507 psi | 89% | 2910 fps | 97.8% |
| IMR 7828 SSC | <<locked>> | 98% | 56,811 psi | 89% | 3022 fps | 98.4% |
| Lovex S065 | <<locked>> | 86% | 54,505 psi | 85% | 2848 fps | 100% |
| Lovex S070 | <<locked>> | 88% | 56,028 psi | 88% | 2894 fps | 99.8% |
| Lovex S071ᴾ | <<locked>> | 100% | 52,692 psi | 83% | 2854 fps | 99.8% |
| Norma 204 | <<locked>> | 88% | 54,810 psi | 86% | 2917 fps | 98.7% |
| Norma MRP | <<locked>> | 94% | 54,839 psi | 86% | 3002 fps | 99.7% |
| Norma URP | <<locked>> | 88% | 55,274 psi | 87% | 2913 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 57,493 psi | 90% | 3045 fps | 98.8% |
| Ramshot Hunter | <<locked>> | 88% | 54,201 psi | 85% | 2920 fps | 99.9% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 55,651 psi | 87% | 2976 fps | 99.6% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,637 psi | 59% | 1860 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 56,797 psi | 89% | 2890 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 54,621 psi | 86% | 2940 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 56,913 psi | 89% | 2956 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 55,071 psi | 86% | 2982 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 51,082 psi | 80% | 3009 fps | 99.8% |
| Rottweil R 903 | <<locked>> | 84% | 57,348 psi | 90% | 2884 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 55,317 psi | 87% | 2897 fps | 98.1% |
| Rottweil R 905 | <<locked>> | 94% | 56,652 psi | 89% | 2963 fps | 99.2% |
| Rottweil R 907 | <<locked>> | 86% | 56,101 psi | 88% | 2881 fps | 99.5% |
| Shooters World Long Rifle | <<locked>> | 86% | 54,505 psi | 85% | 2848 fps | 100% |
| Shooters World SW4350 | <<locked>> | 88% | 56,028 psi | 88% | 2894 fps | 99.8% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 55,172 psi | 86% | 2890 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 57,348 psi | 90% | 2759 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 57,551 psi | 90% | 2858 fps | 99.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 56,188 psi | 88% | 2956 fps | 99.1% |
| Somchem S355 | <<locked>> | 84% | 56,855 psi | 89% | 2874 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 56,985 psi | 89% | 2890 fps | 97.7% |
| Somchem S365 | <<locked>> | 90% | 55,564 psi | 87% | 2920 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 57,174 psi | 90% | 2936 fps | 99.6% |
| Vihtavuori N150 | <<locked>> | 84% | 54,723 psi | 86% | 2802 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 57,203 psi | 90% | 2907 fps | 100% |
| Vihtavuori N165 | <<locked>> | 98% | 56,463 psi | 88% | 2913 fps | 99.4% |
| Vihtavuori N550 | <<locked>> | 88% | 56,391 psi | 88% | 2913 fps | 100% |
| Vihtavuori N555 | <<locked>> | 94% | 54,766 psi | 86% | 2933 fps | 100% |
| Vihtavuori N560 | <<locked>> | 94% | 54,752 psi | 86% | 2995 fps | 97.6% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 54,302 psi | 85% | 2969 fps | 97.8% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 56,768 psi | 89% | 2867 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 55,158 psi | 86% | 2933 fps | 99.7% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 57,334 psi | 90% | 3094 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 57,188 psi | 90% | 2930 fps | 99.1% |
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% | 32,140 psi | 50% | 2441 fps | 95.6% |
| Accurate 4350 | <<locked>> | 80% | 43,279 psi | 68% | 2707 fps | 99.7% |
| Accurate MAGPRO | <<locked>> | 92% | 50,140 psi | 79% | 2913 fps | 95.9% |
| ADI AR 2208 | <<locked>> | 80% | 51,488 psi | 81% | 2792 fps | 100% |
| ADI AR 2209 | <<locked>> | 82% | 38,769 psi | 61% | 2628 fps | 95% |
| ADI AR 2213 | 74.8 gr | 90% | 45,237 psi | 71% | 2799 fps | 95.7% |
| ADI AR 2217 | <<locked>> | 98% | 43,366 psi | 68% | 2753 fps | 95.3% |
| ADI AR 2225 | <<locked>> | 96% | 36,085 psi | 57% | 2641 fps | 96.1% |
| Alliant Power Pro Varmint | <<locked>> | 82% | 39,131 psi | 61% | 2631 fps | 95.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 52,663 psi | 83% | 2818 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 41,524 psi | 65% | 2713 fps | 99.7% |
| Alliant Reloder-17 | <<locked>> | 80% | 47,935 psi | 75% | 2838 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 82% | 38,754 psi | 61% | 2625 fps | 95.1% |
| Alliant Reloder-22 | <<locked>> | 86% | 39,276 psi | 62% | 2680 fps | 95.4% |
| Alliant Reloder-23 | <<locked>> | 80% | 30,893 psi | 48% | 2470 fps | 98.6% |
| Alliant Reloder-25 | <<locked>> | 84% | 30,835 psi | 48% | 2487 fps | 95.5% |
| Alliant Reloder-26 | <<locked>> | 80% | 33,504 psi | 53% | 2598 fps | 97.6% |
| Bofors RP15 | <<locked>> | 88% | 38,914 psi | 61% | 2667 fps | 95.1% |
| Bofors RP3 | <<locked>> | 80% | 53,519 psi | 84% | 2835 fps | 100% |
| Bofors RP30 | <<locked>> | 96% | 41,655 psi | 65% | 2762 fps | 95.4% |
| Bofors RP5 | <<locked>> | 86% | 39,276 psi | 62% | 2680 fps | 95.4% |
| Bofors RP7 | <<locked>> | 80% | 46,398 psi | 73% | 2713 fps | 98.2% |
| Hodgdon H1000 | <<locked>> | 94% | 41,553 psi | 65% | 2713 fps | 95.4% |
| Hodgdon H380 | <<locked>> | 80% | 53,548 psi | 84% | 2851 fps | 100% |
| Hodgdon H414 | <<locked>> | 80% | 45,136 psi | 71% | 2756 fps | 98.5% |
| Hodgdon H4350 | <<locked>> | 80% | 47,776 psi | 75% | 2772 fps | 97.9% |
| Hodgdon H4831 | <<locked>> | 88% | 45,237 psi | 71% | 2746 fps | 95% |
| Hodgdon H4831 SC | <<locked>> | 90% | 47,471 psi | 74% | 2789 fps | 95.6% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 39,247 psi | 62% | 2602 fps | 99.9% |
| Hodgdon Retumbo | <<locked>> | 92% | 38,928 psi | 61% | 2749 fps | 95.9% |
| Hodgdon Superformance | <<locked>> | 80% | 44,324 psi | 69% | 2772 fps | 98.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,702 psi | 43% | 1627 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 54,201 psi | 85% | 2825 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 41,959 psi | 66% | 2644 fps | 97.3% |
| IMR 4451 Enduron | <<locked>> | 80% | 47,863 psi | 75% | 2743 fps | 98.8% |
| IMR 4831 | <<locked>> | 80% | 41,336 psi | 65% | 2654 fps | 99.5% |
| IMR 4955 Enduron | <<locked>> | 88% | 46,862 psi | 73% | 2740 fps | 95.7% |
| IMR 7828 SSC | <<locked>> | 90% | 43,366 psi | 68% | 2769 fps | 95.2% |
| Lovex S065 | <<locked>> | 80% | 45,353 psi | 71% | 2690 fps | 99.3% |
| Lovex S070 | <<locked>> | 80% | 43,613 psi | 68% | 2677 fps | 98.3% |
| Lovex S071 | <<locked>> | 84% | 31,633 psi | 50% | 2428 fps | 95.3% |
| Norma 204 | <<locked>> | 80% | 41,771 psi | 65% | 2674 fps | 95.9% |
| Norma MRP | 70.3 gr | 82% | 35,882 psi | 56% | 2628 fps | 95.7% |
| Norma URP | <<locked>> | 80% | 42,612 psi | 67% | 2694 fps | 99.6% |
| Ramshot Grand | <<locked>> | 90% | 43,091 psi | 68% | 2779 fps | 95.5% |
| Ramshot Hunter | <<locked>> | 80% | 41,495 psi | 65% | 2687 fps | 98.4% |
| Ramshot Magnum | <<locked>> | 90% | 38,551 psi | 60% | 2657 fps | 96.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,253 psi | 44% | 1667 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 53,258 psi | 83% | 2835 fps | 99.7% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 50,865 psi | 80% | 2884 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 43,221 psi | 68% | 2726 fps | 99.5% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 41,452 psi | 65% | 2736 fps | 99.3% |
| ReloadSwiss RS 76 | <<locked>> | 90% | 35,795 psi | 56% | 2664 fps | 95.7% |
| Rottweil R 903 | <<locked>> | 80% | 50,299 psi | 79% | 2779 fps | 100% |
| Rottweil R 904 | <<locked>> | 84% | 42,960 psi | 67% | 2671 fps | 95.2% |
| Rottweil R 905 | <<locked>> | 82% | 37,985 psi | 60% | 2612 fps | 95% |
| Rottweil R 907 | <<locked>> | 80% | 46,398 psi | 73% | 2713 fps | 98.2% |
| Shooters World Long Rifle | <<locked>> | 80% | 45,353 psi | 71% | 2690 fps | 99.3% |
| Shooters World SW4350 | <<locked>> | 80% | 43,613 psi | 68% | 2677 fps | 98.3% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 51,634 psi | 81% | 2835 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 50,763 psi | 80% | 2667 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 44,425 psi | 70% | 2638 fps | 98.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 40,263 psi | 63% | 2664 fps | 95.8% |
| Somchem S355 | <<locked>> | 80% | 50,256 psi | 79% | 2776 fps | 100% |
| Somchem S361 | <<locked>> | 86% | 46,775 psi | 73% | 2717 fps | 95.4% |
| Somchem S365 | <<locked>> | 80% | 39,494 psi | 62% | 2654 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 36,187 psi | 57% | 2539 fps | 95.3% |
| Vihtavuori N150 | <<locked>> | 80% | 48,037 psi | 75% | 2700 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 44,005 psi | 69% | 2694 fps | 99.7% |
| Vihtavuori N165 | <<locked>> | 86% | 38,159 psi | 60% | 2579 fps | 95.7% |
| Vihtavuori N550 | <<locked>> | 80% | 43,555 psi | 68% | 2697 fps | 99.6% |
| Vihtavuori N555 | <<locked>> | 80% | 34,679 psi | 54% | 2552 fps | 98.6% |
| Vihtavuori N560 | 75.5 gr | 88% | 44,599 psi | 70% | 2805 fps | 95.1% |
| Vihtavuori N565 | <<locked>> | 94% | 44,382 psi | 70% | 2785 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 43,192 psi | 68% | 2657 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 45,136 psi | 71% | 2756 fps | 98.5% |
| Winchester StaBALL HD | <<locked>> | 80% | 27,427 psi | 43% | 2467 fps | 98.3% |
| Winchester Supreme 780 | <<locked>> | 86% | 40,466 psi | 63% | 2635 fps | 95.7% |
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 | Prvi Partizan SP. Winchester StaBALL HD delivers the highest muzzle velocity at 3,094 fps; across all powders the maximum-charge window runs from 1,821 fps to 3,094 fps. ADI AR 2217 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 1:14.0 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. Norma MRP, Vihtavuori N560, ADI AR 2213 rank at the top here: for .300 Weath. Mag. with the .308 | 180gr | Prvi Partizan SP 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.