Load Specifications
Load data in caliber .300 Weath. Mag. with .311 | 182gr | Prvi Partizan FMJ BT 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 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% | 54,201 psi | 85% | 2858 fps | 99.9% |
| Accurate 4350 | <<locked>> | 88% | 55,912 psi | 88% | 2897 fps | 100% |
| Accurate MAGPRO | <<locked>> | 96% | 56,347 psi | 88% | 3002 fps | 97.3% |
| ADI AR 2208 | <<locked>> | 84% | 57,450 psi | 90% | 2861 fps | 100% |
| ADI AR 2209 | <<locked>> | 94% | 56,681 psi | 89% | 2949 fps | 99.1% |
| ADI AR 2213 | <<locked>> | 96% | 54,244 psi | 85% | 2946 fps | 97.8% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 40,161 psi | 63% | 2726 fps | 97.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 55,143 psi | 86% | 2835 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 90% | 56,623 psi | 89% | 2953 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 84% | 53,911 psi | 84% | 2913 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 56,086 psi | 88% | 2936 fps | 99% |
| Alliant Reloder-22 | <<locked>> | 98% | 57,580 psi | 90% | 2999 fps | 99.3% |
| Alliant Reloder-23 | <<locked>> | 98% | 54,926 psi | 86% | 2923 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 50,502 psi | 79% | 2917 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 94% | 55,100 psi | 86% | 3009 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 56,463 psi | 88% | 2982 fps | 99.1% |
| Bofors RP3 | <<locked>> | 82% | 56,188 psi | 88% | 2854 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 46,615 psi | 73% | 2844 fps | 96.9% |
| Bofors RP5 | <<locked>> | 98% | 57,580 psi | 90% | 2999 fps | 99.3% |
| Bofors RP7 | <<locked>> | 86% | 55,201 psi | 87% | 2844 fps | 99.4% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 49,980 psi | 78% | 2864 fps | 97.8% |
| Hodgdon H380 | <<locked>> | 82% | 56,231 psi | 88% | 2871 fps | 100% |
| Hodgdon H414 | <<locked>> | 88% | 57,711 psi | 90% | 2949 fps | 99.8% |
| Hodgdon H4350 | <<locked>> | 86% | 56,898 psi | 89% | 2907 fps | 99.2% |
| Hodgdon H4831 | <<locked>> | 94% | 54,389 psi | 85% | 2887 fps | 97.2% |
| Hodgdon H4831 SC | <<locked>> | 96% | 56,898 psi | 89% | 2930 fps | 97.7% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 57,000 psi | 89% | 2874 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 49,559 psi | 78% | 2969 fps | 99% |
| Hodgdon Superformance | <<locked>> | 86% | 54,099 psi | 85% | 2927 fps | 99.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,883 psi | 58% | 1798 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 56,797 psi | 89% | 2841 fps | 100% |
| IMR 4350 | <<locked>> | 90% | 56,579 psi | 89% | 2884 fps | 99.6% |
| IMR 4451 Enduron | <<locked>> | 86% | 56,579 psi | 89% | 2867 fps | 99.7% |
| IMR 4831 | <<locked>> | 90% | 56,173 psi | 88% | 2887 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 55,738 psi | 87% | 2877 fps | 97.6% |
| IMR 7828 SSC | <<locked>> | 98% | 55,564 psi | 87% | 2979 fps | 98.2% |
| Lovex S062 | <<locked>> | 82% | 57,334 psi | 90% | 2835 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 57,029 psi | 89% | 2864 fps | 100% |
| Lovex S070 | <<locked>> | 88% | 55,201 psi | 87% | 2861 fps | 99.7% |
| Lovex S071ᴾ | <<locked>> | 100% | 51,561 psi | 81% | 2818 fps | 99.8% |
| Norma 204 | <<locked>> | 90% | 57,493 psi | 90% | 2936 fps | 99% |
| Norma MRP | <<locked>> | 96% | 57,464 psi | 90% | 3025 fps | 99.9% |
| Norma URP | <<locked>> | 88% | 54,346 psi | 85% | 2881 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 56,260 psi | 88% | 3002 fps | 98.6% |
| Ramshot Hunter | <<locked>> | 90% | 56,724 psi | 89% | 2936 fps | 100% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 54,317 psi | 85% | 2933 fps | 99.4% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,623 psi | 59% | 1841 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 55,927 psi | 88% | 2858 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 57,334 psi | 90% | 2956 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 55,666 psi | 87% | 2920 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 54,085 psi | 85% | 2949 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 49,966 psi | 78% | 2969 fps | 99.7% |
| Rottweil R 903 | <<locked>> | 84% | 56,275 psi | 88% | 2848 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 54,389 psi | 85% | 2861 fps | 97.9% |
| Rottweil R 905 | <<locked>> | 94% | 55,448 psi | 87% | 2923 fps | 99% |
| Rottweil R 907 | <<locked>> | 86% | 55,201 psi | 87% | 2844 fps | 99.4% |
| Shooters World Long Rifle | <<locked>> | 88% | 57,029 psi | 89% | 2864 fps | 100% |
| Shooters World Precision | <<locked>> | 82% | 57,334 psi | 90% | 2835 fps | 100% |
| Shooters World SW4350 | <<locked>> | 88% | 55,201 psi | 87% | 2861 fps | 99.7% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 57,740 psi | 90% | 2907 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 56,492 psi | 89% | 2726 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 56,536 psi | 89% | 2822 fps | 99.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 54,998 psi | 86% | 2920 fps | 99% |
| Somchem S355 | <<locked>> | 84% | 56,028 psi | 88% | 2844 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 56,101 psi | 88% | 2854 fps | 97.5% |
| Somchem S365 | <<locked>> | 90% | 54,389 psi | 85% | 2884 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 56,043 psi | 88% | 2897 fps | 99.5% |
| Vihtavuori N150 | <<locked>> | 86% | 57,276 psi | 90% | 2815 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 56,304 psi | 88% | 2874 fps | 100% |
| Vihtavuori N165 | <<locked>> | 98% | 55,506 psi | 87% | 2877 fps | 99.3% |
| Vihtavuori N550 | <<locked>> | 88% | 55,390 psi | 87% | 2877 fps | 100% |
| Vihtavuori N555 | <<locked>> | 96% | 57,334 psi | 90% | 2949 fps | 100% |
| Vihtavuori N560 | <<locked>> | 96% | 57,406 psi | 90% | 3018 fps | 98% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 52,953 psi | 83% | 2930 fps | 97.5% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 55,709 psi | 87% | 2835 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 54,114 psi | 85% | 2897 fps | 99.6% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 55,579 psi | 87% | 3054 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 56,014 psi | 88% | 2894 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% | 31,560 psi | 49% | 2411 fps | 95.3% |
| Accurate 4350 | <<locked>> | 80% | 42,612 psi | 67% | 2674 fps | 99.6% |
| Accurate MAGPRO | <<locked>> | 92% | 48,921 psi | 77% | 2874 fps | 95.6% |
| ADI AR 2208 | <<locked>> | 80% | 50,821 psi | 80% | 2759 fps | 100% |
| ADI AR 2209 | <<locked>> | 84% | 40,712 psi | 64% | 2654 fps | 95.7% |
| ADI AR 2213 | <<locked>> | 90% | 44,251 psi | 69% | 2756 fps | 95.3% |
| ADI AR 2225 | <<locked>> | 96% | 35,375 psi | 55% | 2602 fps | 95.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 51,793 psi | 81% | 2782 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 40,872 psi | 64% | 2680 fps | 99.6% |
| Alliant Reloder-17 | <<locked>> | 80% | 46,934 psi | 74% | 2802 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 84% | 40,625 psi | 64% | 2651 fps | 95.7% |
| Alliant Reloder-22 | <<locked>> | 86% | 38,522 psi | 60% | 2644 fps | 95.1% |
| Alliant Reloder-23 | <<locked>> | 80% | 30,342 psi | 48% | 2441 fps | 98.4% |
| Alliant Reloder-25 | <<locked>> | 84% | 30,197 psi | 47% | 2454 fps | 95.1% |
| Alliant Reloder-26 | 68.9 gr | 80% | 32,779 psi | 51% | 2562 fps | 97.3% |
| Bofors RP15 | <<locked>> | 90% | 40,770 psi | 64% | 2694 fps | 95.8% |
| Bofors RP3 | <<locked>> | 80% | 52,446 psi | 82% | 2799 fps | 100% |
| Bofors RP30 | <<locked>> | 96% | 40,712 psi | 64% | 2723 fps | 95% |
| Bofors RP5 | <<locked>> | 86% | 38,522 psi | 60% | 2644 fps | 95.1% |
| Bofors RP7 | <<locked>> | 80% | 45,788 psi | 72% | 2680 fps | 98.1% |
| Hodgdon H1000 | <<locked>> | 94% | 40,698 psi | 64% | 2677 fps | 95% |
| Hodgdon H380 | <<locked>> | 80% | 52,547 psi | 82% | 2812 fps | 100% |
| Hodgdon H414 | <<locked>> | 80% | 44,208 psi | 69% | 2720 fps | 98.3% |
| Hodgdon H4350 | <<locked>> | 80% | 46,833 psi | 73% | 2736 fps | 97.7% |
| Hodgdon H4831 | <<locked>> | 90% | 47,369 psi | 74% | 2766 fps | 95.6% |
| Hodgdon H4831 SC | <<locked>> | 90% | 46,412 psi | 73% | 2749 fps | 95.3% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 38,522 psi | 60% | 2569 fps | 99.9% |
| Hodgdon Retumbo | <<locked>> | 92% | 38,174 psi | 60% | 2710 fps | 95.5% |
| Hodgdon Superformance | <<locked>> | 80% | 43,352 psi | 68% | 2736 fps | 97.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,601 psi | 43% | 1608 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 53,490 psi | 84% | 2792 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 41,263 psi | 65% | 2608 fps | 97.1% |
| IMR 4451 Enduron | <<locked>> | 80% | 47,123 psi | 74% | 2707 fps | 98.7% |
| IMR 4831 | <<locked>> | 80% | 40,524 psi | 64% | 2618 fps | 99.4% |
| IMR 4955 Enduron | <<locked>> | 88% | 46,137 psi | 72% | 2707 fps | 95.4% |
| IMR 7828 SSC | <<locked>> | 92% | 45,440 psi | 71% | 2795 fps | 95.8% |
| Lovex S062 | <<locked>> | 80% | 53,824 psi | 84% | 2785 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 44,744 psi | 70% | 2661 fps | 99.2% |
| Lovex S070 | <<locked>> | 80% | 43,018 psi | 67% | 2644 fps | 98.1% |
| Lovex S071 | <<locked>> | 84% | 30,908 psi | 48% | 2395 fps | 95% |
| Norma 204 | <<locked>> | 80% | 40,915 psi | 64% | 2638 fps | 95.6% |
| Norma MRP | 68.5 gr | 82% | 35,128 psi | 55% | 2592 fps | 95.4% |
| Norma URP | <<locked>> | 80% | 41,959 psi | 66% | 2664 fps | 99.5% |
| Ramshot Grand | <<locked>> | 90% | 42,279 psi | 66% | 2743 fps | 95.2% |
| Ramshot Hunter | <<locked>> | 80% | 40,654 psi | 64% | 2651 fps | 98.2% |
| Ramshot Magnum | <<locked>> | 90% | 37,710 psi | 59% | 2618 fps | 95.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,166 psi | 44% | 1647 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 52,344 psi | 82% | 2799 fps | 99.7% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 49,777 psi | 78% | 2848 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 42,279 psi | 66% | 2690 fps | 99.4% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 40,640 psi | 64% | 2700 fps | 99.1% |
| ReloadSwiss RS 76 | <<locked>> | 90% | 34,911 psi | 55% | 2621 fps | 95.2% |
| Rottweil R 903 | <<locked>> | 80% | 49,603 psi | 78% | 2746 fps | 100% |
| Rottweil R 904 | <<locked>> | 86% | 45,005 psi | 71% | 2694 fps | 95.8% |
| Rottweil R 905 | <<locked>> | 84% | 39,726 psi | 62% | 2631 fps | 95.6% |
| Rottweil R 907 | <<locked>> | 80% | 45,788 psi | 72% | 2680 fps | 98.1% |
| Shooters World Long Rifle | <<locked>> | 80% | 44,744 psi | 70% | 2661 fps | 99.2% |
| Shooters World Precision | <<locked>> | 80% | 53,824 psi | 84% | 2785 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 43,018 psi | 67% | 2644 fps | 98.1% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 50,662 psi | 79% | 2802 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 50,053 psi | 78% | 2635 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 43,729 psi | 69% | 2605 fps | 98.2% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 39,363 psi | 62% | 2625 fps | 95.5% |
| Somchem S355 | <<locked>> | 80% | 49,559 psi | 78% | 2743 fps | 100% |
| Somchem S361 | <<locked>> | 86% | 45,861 psi | 72% | 2680 fps | 95.1% |
| Somchem S365 | <<locked>> | 80% | 38,609 psi | 61% | 2621 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 35,360 psi | 55% | 2503 fps | 95% |
| Vihtavuori N150 | <<locked>> | 80% | 47,398 psi | 74% | 2671 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 43,381 psi | 68% | 2661 fps | 99.6% |
| Vihtavuori N165 | <<locked>> | 86% | 37,391 psi | 59% | 2543 fps | 95.4% |
| Vihtavuori N550 | <<locked>> | 80% | 42,612 psi | 67% | 2657 fps | 99.4% |
| Vihtavuori N555 | <<locked>> | 80% | 33,895 psi | 53% | 2516 fps | 98.4% |
| Vihtavuori N560 | 75.2 gr | 90% | 46,731 psi | 73% | 2831 fps | 95.7% |
| Vihtavuori N565 | <<locked>> | 96% | 46,398 psi | 73% | 2812 fps | 95.9% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 42,235 psi | 66% | 2625 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 44,367 psi | 70% | 2720 fps | 98.3% |
| Winchester StaBALL HD | <<locked>> | 80% | 26,803 psi | 42% | 2428 fps | 98% |
| Winchester Supreme 780 | <<locked>> | 86% | 39,595 psi | 62% | 2598 fps | 95.4% |
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 85 powders for .300 Weath. Mag. loaded with the .311 | 182gr | Prvi Partizan FMJ BT. Winchester StaBALL HD delivers the highest muzzle velocity at 3,054 fps; across all powders the maximum-charge window runs from 1,798 fps to 3,054 fps. ADI AR 2217 gives the best case fill at 100 %, and 85 of the 85 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 56–90 %, leaving at least 10 % headroom. The 182.0 gr projectile in 0.311" calls for a 1:12.5 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, Alliant Reloder-26 rank at the top here: for .300 Weath. Mag. with the .311 | 182gr | Prvi Partizan FMJ BT they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, IMR 8133 Enduron, ReloadSwiss RS 80, Vihtavuori N170 burn incompletely and react more sensitively to barrel length and temperature. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.