Load Specifications
Load data in caliber .300 Weath. Mag. with .3085 | 180gr | Prvi Partizan SP bullet and 77 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% | 55,332 psi | 87% | 2894 fps | 100% |
| Accurate 4350 | <<locked>> | 88% | 56,898 psi | 89% | 2933 fps | 100% |
| Accurate MAGPRO | <<locked>> | 94% | 53,737 psi | 84% | 2979 fps | 96.8% |
| ADI AR 2208 | <<locked>> | 82% | 54,781 psi | 86% | 2844 fps | 100% |
| ADI AR 2209 | <<locked>> | 94% | 57,595 psi | 90% | 2986 fps | 99.2% |
| ADI AR 2213 | <<locked>> | 96% | 55,230 psi | 87% | 2986 fps | 98.1% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 46,296 psi | 73% | 2812 fps | 96.3% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 41,060 psi | 64% | 2766 fps | 98% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 56,014 psi | 88% | 2867 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 90% | 57,609 psi | 90% | 2989 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 84% | 55,143 psi | 86% | 2949 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 57,000 psi | 89% | 2972 fps | 99.2% |
| Alliant Reloder-22 | <<locked>> | 96% | 54,984 psi | 86% | 2979 fps | 99% |
| Alliant Reloder-23 | <<locked>> | 98% | 56,101 psi | 88% | 2956 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 51,677 psi | 81% | 2956 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 94% | 56,478 psi | 89% | 3048 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 57,725 psi | 90% | 3022 fps | 99.3% |
| Bofors RP3 | <<locked>> | 82% | 57,043 psi | 89% | 2884 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 47,790 psi | 75% | 2884 fps | 97.2% |
| Bofors RP5 | <<locked>> | 96% | 54,984 psi | 86% | 2979 fps | 99% |
| Bofors RP7 | <<locked>> | 86% | 56,130 psi | 88% | 2881 fps | 99.5% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 51,024 psi | 80% | 2904 fps | 98.1% |
| Hodgdon H380 | <<locked>> | 82% | 57,029 psi | 89% | 2904 fps | 100% |
| Hodgdon H414 | <<locked>> | 86% | 54,969 psi | 86% | 2930 fps | 99.7% |
| Hodgdon H4350 | <<locked>> | 86% | 57,740 psi | 90% | 2943 fps | 99.4% |
| Hodgdon H4831 | <<locked>> | 94% | 55,419 psi | 87% | 2927 fps | 97.5% |
| Hodgdon H4831 SC | <<locked>> | 94% | 54,302 psi | 85% | 2907 fps | 97.2% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 54,273 psi | 85% | 2858 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 50,647 psi | 79% | 3012 fps | 99.2% |
| Hodgdon Superformance | <<locked>> | 86% | 55,448 psi | 87% | 2969 fps | 99.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,927 psi | 58% | 1821 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 57,711 psi | 90% | 2877 fps | 100% |
| IMR 4350 | <<locked>> | 90% | 57,537 psi | 90% | 2920 fps | 99.7% |
| IMR 4451 Enduron | <<locked>> | 86% | 57,450 psi | 90% | 2904 fps | 99.8% |
| IMR 4831 | <<locked>> | 90% | 57,276 psi | 90% | 2927 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 56,507 psi | 89% | 2910 fps | 97.8% |
| IMR 7828 SSC | <<locked>> | 98% | 56,840 psi | 89% | 3022 fps | 98.4% |
| Lovex S065 | <<locked>> | 86% | 54,534 psi | 85% | 2848 fps | 100% |
| Lovex S070 | <<locked>> | 88% | 56,057 psi | 88% | 2894 fps | 99.8% |
| Lovex S071ᴾ | <<locked>> | 100% | 52,678 psi | 83% | 2854 fps | 99.8% |
| Norma 204 | <<locked>> | 88% | 54,824 psi | 86% | 2917 fps | 98.7% |
| Norma MRP | <<locked>> | 94% | 54,868 psi | 86% | 3005 fps | 99.7% |
| Norma URP | <<locked>> | 88% | 55,288 psi | 87% | 2917 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 57,522 psi | 90% | 3041 fps | 98.8% |
| Ramshot Hunter | <<locked>> | 88% | 54,215 psi | 85% | 2917 fps | 99.9% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 55,695 psi | 87% | 2976 fps | 99.6% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,652 psi | 59% | 1860 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 56,811 psi | 89% | 2890 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 54,621 psi | 86% | 2940 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 56,942 psi | 89% | 2956 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 55,027 psi | 86% | 2982 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 51,111 psi | 80% | 3009 fps | 99.8% |
| Rottweil R 903 | <<locked>> | 84% | 57,305 psi | 90% | 2884 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 55,303 psi | 87% | 2897 fps | 98.1% |
| Rottweil R 905 | <<locked>> | 94% | 56,652 psi | 89% | 2963 fps | 99.2% |
| Rottweil R 907 | <<locked>> | 86% | 56,130 psi | 88% | 2881 fps | 99.5% |
| Shooters World Long Rifle | <<locked>> | 86% | 54,534 psi | 85% | 2848 fps | 100% |
| Shooters World SW4350 | <<locked>> | 88% | 56,057 psi | 88% | 2894 fps | 99.8% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 55,129 psi | 86% | 2890 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 57,377 psi | 90% | 2756 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 57,537 psi | 90% | 2858 fps | 99.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 56,188 psi | 88% | 2956 fps | 99.1% |
| Somchem S355 | <<locked>> | 84% | 56,884 psi | 89% | 2877 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 56,956 psi | 89% | 2890 fps | 97.7% |
| Somchem S365 | <<locked>> | 90% | 55,593 psi | 87% | 2920 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 57,130 psi | 90% | 2936 fps | 99.6% |
| Vihtavuori N150 | <<locked>> | 84% | 54,694 psi | 86% | 2802 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 57,203 psi | 90% | 2907 fps | 100% |
| Vihtavuori N165 | <<locked>> | 98% | 56,492 psi | 89% | 2910 fps | 99.4% |
| Vihtavuori N550 | <<locked>> | 88% | 56,420 psi | 88% | 2913 fps | 100% |
| Vihtavuori N555 | <<locked>> | 94% | 54,795 psi | 86% | 2930 fps | 100% |
| Vihtavuori N560 | <<locked>> | 94% | 54,781 psi | 86% | 2995 fps | 97.6% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 54,331 psi | 85% | 2969 fps | 97.8% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 56,797 psi | 89% | 2867 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 55,187 psi | 86% | 2933 fps | 99.7% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 57,377 psi | 90% | 3097 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 57,217 psi | 90% | 2933 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% | 32,155 psi | 50% | 2441 fps | 95.6% |
| Accurate 4350 | <<locked>> | 80% | 43,279 psi | 68% | 2707 fps | 99.7% |
| Accurate MAGPRO | <<locked>> | 90% | 46,615 psi | 73% | 2848 fps | 95% |
| ADI AR 2208 | <<locked>> | 80% | 51,503 psi | 81% | 2792 fps | 100% |
| ADI AR 2209 | <<locked>> | 82% | 38,740 psi | 61% | 2628 fps | 95% |
| ADI AR 2213 | 74.8 gr | 90% | 45,266 psi | 71% | 2799 fps | 95.7% |
| ADI AR 2217 | <<locked>> | 98% | 43,352 psi | 68% | 2749 fps | 95.3% |
| ADI AR 2225 | <<locked>> | 96% | 36,100 psi | 57% | 2641 fps | 96.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 52,692 psi | 83% | 2818 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 41,553 psi | 65% | 2710 fps | 99.7% |
| Alliant Reloder-17 | <<locked>> | 80% | 47,950 psi | 75% | 2838 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 82% | 38,740 psi | 61% | 2625 fps | 95.1% |
| Alliant Reloder-22 | <<locked>> | 86% | 39,276 psi | 62% | 2680 fps | 95.4% |
| Alliant Reloder-23 | <<locked>> | 80% | 30,908 psi | 48% | 2474 fps | 98.6% |
| Alliant Reloder-25 | <<locked>> | 84% | 30,850 psi | 48% | 2490 fps | 95.5% |
| Alliant Reloder-26 | <<locked>> | 80% | 33,533 psi | 53% | 2598 fps | 97.6% |
| Bofors RP15 | <<locked>> | 88% | 38,928 psi | 61% | 2667 fps | 95.1% |
| Bofors RP3 | <<locked>> | 80% | 53,534 psi | 84% | 2835 fps | 100% |
| Bofors RP30 | <<locked>> | 96% | 41,684 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% | 41,524 psi | 65% | 2713 fps | 95.4% |
| Hodgdon H380 | <<locked>> | 80% | 53,563 psi | 84% | 2851 fps | 100% |
| Hodgdon H414 | <<locked>> | 80% | 45,150 psi | 71% | 2756 fps | 98.5% |
| Hodgdon H4350 | <<locked>> | 80% | 47,805 psi | 75% | 2772 fps | 97.9% |
| Hodgdon H4831 | <<locked>> | 88% | 45,237 psi | 71% | 2746 fps | 95% |
| Hodgdon H4831 SC | <<locked>> | 90% | 47,485 psi | 74% | 2789 fps | 95.7% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 39,218 psi | 61% | 2598 fps | 99.9% |
| Hodgdon Retumbo | <<locked>> | 92% | 38,957 psi | 61% | 2749 fps | 95.9% |
| Hodgdon Superformance | <<locked>> | 80% | 44,353 psi | 70% | 2772 fps | 98.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,702 psi | 43% | 1627 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 54,215 psi | 85% | 2825 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 41,974 psi | 66% | 2641 fps | 97.3% |
| IMR 4451 Enduron | <<locked>> | 80% | 47,877 psi | 75% | 2743 fps | 98.8% |
| IMR 4831 | <<locked>> | 80% | 41,321 psi | 65% | 2654 fps | 99.5% |
| IMR 4955 Enduron | <<locked>> | 88% | 46,862 psi | 73% | 2743 fps | 95.7% |
| IMR 7828 SSC | <<locked>> | 90% | 43,381 psi | 68% | 2772 fps | 95.2% |
| Lovex S065 | <<locked>> | 80% | 45,368 psi | 71% | 2690 fps | 99.3% |
| Lovex S070 | <<locked>> | 80% | 43,627 psi | 68% | 2677 fps | 98.3% |
| Lovex S071 | <<locked>> | 84% | 31,604 psi | 50% | 2428 fps | 95.3% |
| Norma 204 | <<locked>> | 80% | 41,756 psi | 65% | 2674 fps | 95.9% |
| Norma MRP | 70.3 gr | 82% | 35,897 psi | 56% | 2625 fps | 95.7% |
| Norma URP | <<locked>> | 80% | 42,627 psi | 67% | 2697 fps | 99.6% |
| Ramshot Grand | <<locked>> | 90% | 43,120 psi | 68% | 2779 fps | 95.5% |
| Ramshot Hunter | <<locked>> | 80% | 41,524 psi | 65% | 2687 fps | 98.4% |
| Ramshot Magnum | <<locked>> | 90% | 38,580 psi | 60% | 2657 fps | 96.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,253 psi | 44% | 1667 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 53,287 psi | 84% | 2835 fps | 99.7% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 50,894 psi | 80% | 2884 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 43,221 psi | 68% | 2726 fps | 99.5% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 41,466 psi | 65% | 2736 fps | 99.3% |
| ReloadSwiss RS 76 | <<locked>> | 90% | 35,781 psi | 56% | 2664 fps | 95.7% |
| Rottweil R 903 | <<locked>> | 80% | 50,328 psi | 79% | 2779 fps | 100% |
| Rottweil R 904 | <<locked>> | 84% | 42,975 psi | 67% | 2671 fps | 95.2% |
| Rottweil R 905 | <<locked>> | 82% | 38,000 psi | 60% | 2608 fps | 95% |
| Rottweil R 907 | <<locked>> | 80% | 46,398 psi | 73% | 2713 fps | 98.2% |
| Shooters World Long Rifle | <<locked>> | 80% | 45,368 psi | 71% | 2690 fps | 99.3% |
| Shooters World SW4350 | <<locked>> | 80% | 43,627 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% | 50,778 psi | 80% | 2667 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 44,425 psi | 70% | 2638 fps | 98.3% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 40,234 psi | 63% | 2664 fps | 95.8% |
| Somchem S355 | <<locked>> | 80% | 50,227 psi | 79% | 2776 fps | 100% |
| Somchem S361 | <<locked>> | 86% | 46,789 psi | 73% | 2717 fps | 95.4% |
| Somchem S365 | <<locked>> | 80% | 39,508 psi | 62% | 2654 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 36,201 psi | 57% | 2539 fps | 95.3% |
| Vihtavuori N150 | <<locked>> | 80% | 48,051 psi | 75% | 2700 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 44,005 psi | 69% | 2690 fps | 99.7% |
| Vihtavuori N165 | <<locked>> | 86% | 38,130 psi | 60% | 2575 fps | 95.6% |
| Vihtavuori N550 | <<locked>> | 80% | 43,526 psi | 68% | 2697 fps | 99.6% |
| Vihtavuori N555 | <<locked>> | 80% | 34,693 psi | 54% | 2552 fps | 98.6% |
| Vihtavuori N560 | 75.5 gr | 88% | 44,628 psi | 70% | 2805 fps | 95.1% |
| Vihtavuori N565 | <<locked>> | 94% | 44,208 psi | 69% | 2785 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 43,018 psi | 67% | 2654 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 45,150 psi | 71% | 2756 fps | 98.5% |
| Winchester StaBALL HD | <<locked>> | 80% | 27,441 psi | 43% | 2467 fps | 98.4% |
| Winchester Supreme 780 | <<locked>> | 86% | 40,495 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 77 powders for .300 Weath. Mag. loaded with the .3085 | 180gr | Prvi Partizan SP. Winchester StaBALL HD delivers the highest muzzle velocity at 3,097 fps; across all powders the maximum-charge window runs from 1,821 fps to 3,097 fps. ADI AR 2217 gives the best case fill at 100 %, and 77 of the 77 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 0.3085" 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 .3085 | 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.