Load Specifications
Load data in caliber .300 Weath. Mag. with .311 | 190gr | Prvi Partizan FMJ BT bullet and 76 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% | 56,028 psi | 88% | 2828 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 54,143 psi | 85% | 2815 fps | 100% |
| Accurate MAGPRO | <<locked>> | 94% | 54,607 psi | 86% | 2920 fps | 97.4% |
| ADI AR 2208 | <<locked>> | 82% | 55,376 psi | 87% | 2776 fps | 100% |
| ADI AR 2209 | <<locked>> | 92% | 54,636 psi | 86% | 2864 fps | 99.1% |
| ADI AR 2213 | <<locked>> | 96% | 56,115 psi | 88% | 2923 fps | 98.5% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 46,963 psi | 74% | 2759 fps | 97% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 41,727 psi | 65% | 2717 fps | 98.6% |
| Alliant Power Pro Varmint | <<locked>> | 92% | 54,868 psi | 86% | 2861 fps | 99.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 56,724 psi | 89% | 2799 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 88% | 54,810 psi | 86% | 2867 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 84% | 55,883 psi | 88% | 2881 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 92% | 54,186 psi | 85% | 2851 fps | 99.1% |
| Alliant Reloder-22 | <<locked>> | 96% | 55,941 psi | 88% | 2920 fps | 99.4% |
| Alliant Reloder-23 | <<locked>> | 98% | 56,855 psi | 89% | 2890 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 52,518 psi | 82% | 2894 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 94% | 57,566 psi | 90% | 2982 fps | 100% |
| Bofors RP15 | <<locked>> | 98% | 54,882 psi | 86% | 2900 fps | 99.2% |
| Bofors RP30ᴾ | <<locked>> | 100% | 48,414 psi | 76% | 2825 fps | 97.8% |
| Bofors RP5 | <<locked>> | 96% | 55,941 psi | 88% | 2920 fps | 99.4% |
| Bofors RP7 | <<locked>> | 86% | 56,739 psi | 89% | 2815 fps | 99.7% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 51,634 psi | 81% | 2844 fps | 98.6% |
| Hodgdon H414 | <<locked>> | 86% | 55,680 psi | 87% | 2864 fps | 99.9% |
| Hodgdon H4350 | <<locked>> | 84% | 54,998 psi | 86% | 2822 fps | 99.3% |
| Hodgdon H4831 | <<locked>> | 94% | 56,217 psi | 88% | 2864 fps | 98% |
| Hodgdon H4831 SC | <<locked>> | 94% | 55,100 psi | 86% | 2848 fps | 97.8% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 55,158 psi | 86% | 2792 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 51,561 psi | 81% | 2956 fps | 99.6% |
| Hodgdon Superformance | <<locked>> | 86% | 56,043 psi | 88% | 2904 fps | 99.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,898 psi | 58% | 1762 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 54,723 psi | 86% | 2802 fps | 99.6% |
| IMR 4451 Enduron | <<locked>> | 84% | 54,607 psi | 86% | 2782 fps | 99.7% |
| IMR 4831 | <<locked>> | 88% | 54,418 psi | 85% | 2805 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 57,188 psi | 90% | 2848 fps | 98.3% |
| IMR 7828 SSC | <<locked>> | 98% | 57,653 psi | 90% | 2959 fps | 98.8% |
| Lovex S065 | <<locked>> | 86% | 55,347 psi | 87% | 2785 fps | 100% |
| Lovex S070 | <<locked>> | 88% | 56,855 psi | 89% | 2831 fps | 99.9% |
| Lovex S071ᴾ | <<locked>> | 100% | 53,476 psi | 84% | 2792 fps | 100% |
| Norma 204 | <<locked>> | 88% | 55,419 psi | 87% | 2851 fps | 99.1% |
| Norma 217ᴾ | <<locked>> | 100% | 37,202 psi | 58% | 2638 fps | 96.6% |
| Norma MRP | <<locked>> | 94% | 55,695 psi | 87% | 2940 fps | 99.9% |
| Norma URP | <<locked>> | 88% | 56,130 psi | 88% | 2848 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 54,346 psi | 85% | 2920 fps | 98.7% |
| Ramshot Hunter | <<locked>> | 88% | 54,795 psi | 86% | 2851 fps | 100% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 56,710 psi | 89% | 2917 fps | 99.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,855 psi | 59% | 1804 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 57,508 psi | 90% | 2825 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 55,564 psi | 87% | 2871 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 57,682 psi | 90% | 2890 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 55,883 psi | 88% | 2917 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 51,895 psi | 81% | 2953 fps | 99.9% |
| Rottweil R 903 | <<locked>> | 82% | 54,317 psi | 85% | 2762 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 56,086 psi | 88% | 2835 fps | 98.5% |
| Rottweil R 905 | <<locked>> | 94% | 57,421 psi | 90% | 2897 fps | 99.5% |
| Rottweil R 907 | <<locked>> | 86% | 56,739 psi | 89% | 2815 fps | 99.7% |
| Shooters World Long Rifle | <<locked>> | 86% | 55,347 psi | 87% | 2785 fps | 100% |
| Shooters World SW4350 | <<locked>> | 88% | 56,855 psi | 89% | 2831 fps | 99.9% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 55,883 psi | 88% | 2822 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 54,549 psi | 85% | 2644 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 54,549 psi | 85% | 2740 fps | 99.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 56,956 psi | 89% | 2894 fps | 99.4% |
| Somchem S355 | <<locked>> | 84% | 57,638 psi | 90% | 2805 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 57,667 psi | 90% | 2828 fps | 98.1% |
| Somchem S365 | <<locked>> | 90% | 56,434 psi | 88% | 2851 fps | 100% |
| Somchem S385 | <<locked>> | 92% | 54,186 psi | 85% | 2815 fps | 99.6% |
| Vihtavuori N150 | <<locked>> | 84% | 55,303 psi | 87% | 2730 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 54,505 psi | 85% | 2792 fps | 100% |
| Vihtavuori N165 | <<locked>> | 98% | 57,217 psi | 90% | 2848 fps | 99.6% |
| Vihtavuori N550 | <<locked>> | 88% | 57,159 psi | 90% | 2848 fps | 100% |
| Vihtavuori N555 | <<locked>> | 94% | 55,767 psi | 87% | 2867 fps | 100% |
| Vihtavuori N560 | <<locked>> | 94% | 55,564 psi | 87% | 2933 fps | 98.1% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 55,129 psi | 86% | 2910 fps | 98.3% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 57,566 psi | 90% | 2802 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 55,912 psi | 88% | 2867 fps | 99.9% |
| Winchester StaBALL HD | <<locked>> | 98% | 54,099 psi | 85% | 2972 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 54,201 psi | 85% | 2812 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% | 32,808 psi | 51% | 2398 fps | 96.4% |
| Accurate 4350 | <<locked>> | 80% | 44,150 psi | 69% | 2651 fps | 99.9% |
| Accurate MAGPRO | 76.5 gr | 90% | 47,471 psi | 74% | 2795 fps | 95.7% |
| ADI AR 2208 | <<locked>> | 80% | 52,170 psi | 82% | 2726 fps | 100% |
| ADI AR 2209 | <<locked>> | 82% | 39,349 psi | 62% | 2575 fps | 95.8% |
| ADI AR 2213 | <<locked>> | 88% | 42,859 psi | 67% | 2680 fps | 95.4% |
| ADI AR 2217 | <<locked>> | 96% | 41,060 psi | 64% | 2635 fps | 95.1% |
| ADI AR 2225 | <<locked>> | 94% | 34,447 psi | 54% | 2536 fps | 95.9% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 37,217 psi | 58% | 2523 fps | 95.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 53,272 psi | 83% | 2749 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 42,264 psi | 66% | 2654 fps | 99.9% |
| Alliant Reloder-17 | <<locked>> | 80% | 48,689 psi | 76% | 2772 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 36,883 psi | 58% | 2516 fps | 95% |
| Alliant Reloder-22 | <<locked>> | 84% | 37,405 psi | 59% | 2569 fps | 95.3% |
| Alliant Reloder-23 | <<locked>> | 80% | 31,488 psi | 49% | 2425 fps | 99.1% |
| Alliant Reloder-25 | <<locked>> | 82% | 29,327 psi | 46% | 2382 fps | 95.3% |
| Alliant Reloder-26 | 68.8 gr | 80% | 34,171 psi | 54% | 2552 fps | 98.3% |
| Bofors RP15 | <<locked>> | 86% | 37,101 psi | 58% | 2559 fps | 95% |
| Bofors RP30 | <<locked>> | 94% | 39,523 psi | 62% | 2648 fps | 95.2% |
| Bofors RP5 | <<locked>> | 84% | 37,405 psi | 59% | 2569 fps | 95.3% |
| Bofors RP7 | <<locked>> | 80% | 47,065 psi | 74% | 2654 fps | 98.7% |
| Hodgdon H1000 | <<locked>> | 92% | 39,465 psi | 62% | 2602 fps | 95.2% |
| Hodgdon H414 | <<locked>> | 80% | 45,687 psi | 72% | 2694 fps | 98.9% |
| Hodgdon H4350 | <<locked>> | 80% | 48,240 psi | 76% | 2707 fps | 98.4% |
| Hodgdon H4831 | <<locked>> | 88% | 45,876 psi | 72% | 2690 fps | 95.7% |
| Hodgdon H4831 SC | <<locked>> | 88% | 44,933 psi | 70% | 2671 fps | 95.5% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 39,914 psi | 63% | 2546 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 90% | 37,028 psi | 58% | 2638 fps | 95.7% |
| Hodgdon Superformance | <<locked>> | 80% | 44,991 psi | 71% | 2713 fps | 98.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,615 psi | 43% | 1572 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 42,511 psi | 67% | 2585 fps | 97.8% |
| IMR 4451 Enduron | <<locked>> | 80% | 48,399 psi | 76% | 2677 fps | 99.2% |
| IMR 4831 | <<locked>> | 80% | 41,916 psi | 66% | 2595 fps | 99.7% |
| IMR 4955 Enduron | <<locked>> | 86% | 44,672 psi | 70% | 2631 fps | 95.6% |
| IMR 7828 SSC | <<locked>> | 88% | 41,234 psi | 65% | 2657 fps | 95% |
| Lovex S065 | <<locked>> | 80% | 46,021 psi | 72% | 2631 fps | 99.6% |
| Lovex S070 | <<locked>> | 80% | 44,324 psi | 69% | 2618 fps | 98.7% |
| Lovex S071 | <<locked>> | 82% | 30,124 psi | 47% | 2329 fps | 95.2% |
| Norma 204 | <<locked>> | 80% | 42,279 psi | 66% | 2615 fps | 96.6% |
| Norma 217 | <<locked>> | 98% | 34,925 psi | 55% | 2579 fps | 95.6% |
| Norma MRP | <<locked>> | 80% | 33,997 psi | 53% | 2513 fps | 95.5% |
| Norma URP | <<locked>> | 80% | 43,381 psi | 68% | 2638 fps | 99.8% |
| Ramshot Grand | <<locked>> | 88% | 40,843 psi | 64% | 2664 fps | 95.3% |
| Ramshot Hunter | <<locked>> | 80% | 42,061 psi | 66% | 2628 fps | 98.8% |
| Ramshot Magnum | <<locked>> | 88% | 36,463 psi | 57% | 2546 fps | 95.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,355 psi | 44% | 1614 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 53,838 psi | 84% | 2766 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 51,648 psi | 81% | 2815 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 43,845 psi | 69% | 2667 fps | 99.8% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 42,105 psi | 66% | 2680 fps | 99.6% |
| ReloadSwiss RS 76 | <<locked>> | 88% | 33,881 psi | 53% | 2549 fps | 95.4% |
| Rottweil R 903 | <<locked>> | 80% | 51,140 psi | 80% | 2717 fps | 100% |
| Rottweil R 904 | <<locked>> | 82% | 40,741 psi | 64% | 2559 fps | 95% |
| Rottweil R 905 | <<locked>> | 82% | 38,653 psi | 61% | 2559 fps | 95.8% |
| Rottweil R 907 | <<locked>> | 80% | 47,065 psi | 74% | 2654 fps | 98.7% |
| Shooters World Long Rifle | <<locked>> | 80% | 46,021 psi | 72% | 2631 fps | 99.6% |
| Shooters World SW4350 | <<locked>> | 80% | 44,324 psi | 69% | 2618 fps | 98.7% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 52,228 psi | 82% | 2766 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 51,343 psi | 80% | 2598 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 44,962 psi | 70% | 2579 fps | 98.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 82% | 38,319 psi | 60% | 2552 fps | 95.7% |
| Somchem S355 | <<locked>> | 80% | 50,995 psi | 80% | 2710 fps | 100% |
| Somchem S361 | <<locked>> | 84% | 44,280 psi | 69% | 2602 fps | 95.2% |
| Somchem S365 | <<locked>> | 80% | 40,161 psi | 63% | 2595 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 36,608 psi | 57% | 2484 fps | 96% |
| Vihtavuori N150 | <<locked>> | 80% | 48,791 psi | 76% | 2638 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 44,802 psi | 70% | 2635 fps | 99.9% |
| Vihtavuori N165 | <<locked>> | 84% | 36,274 psi | 57% | 2470 fps | 95.5% |
| Vihtavuori N550 | <<locked>> | 80% | 44,005 psi | 69% | 2631 fps | 99.8% |
| Vihtavuori N555 | <<locked>> | 80% | 35,259 psi | 55% | 2500 fps | 99.1% |
| Vihtavuori N560 | 73.4 gr | 88% | 45,237 psi | 71% | 2749 fps | 95.8% |
| Vihtavuori N565 | <<locked>> | 92% | 41,989 psi | 66% | 2671 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 43,642 psi | 68% | 2595 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 45,847 psi | 72% | 2697 fps | 98.9% |
| Winchester StaBALL HD | <<locked>> | 80% | 27,847 psi | 44% | 2425 fps | 99.1% |
| Winchester Supreme 780 | <<locked>> | 84% | 38,363 psi | 60% | 2523 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 76 powders for .300 Weath. Mag. loaded with the .311 | 190gr | Prvi Partizan FMJ BT. Alliant Reloder-26 delivers the highest muzzle velocity at 2,982 fps; across all powders the maximum-charge window runs from 1,762 fps to 2,982 fps. ADI AR 2217 gives the best case fill at 100 %, and 76 of the 76 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 190.0 gr projectile in 0.311" calls for a 1:13.0 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 .311 | 190gr | Prvi Partizan FMJ BT 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.