Load Specifications
Load data in caliber .300 Weath. Mag. with .3085 | 168gr | Prvi Partizan HP BT bullet and 86 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 ReloadSwiss RS 70.
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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You can find more information in our FAQ: How can I use the Personalized Load Calculator?
Max Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2700 | <<locked>> | 82% | 55,912 psi | 88% | 2923 fps | 98.9% |
| Accurate 3100 | <<locked>> | 98% | 55,216 psi | 87% | 2979 fps | 99.8% |
| Accurate 4064 | <<locked>> | 82% | 55,811 psi | 87% | 2910 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 56,884 psi | 89% | 3025 fps | 100% |
| Accurate MAGPRO | <<locked>> | 98% | 57,537 psi | 90% | 3127 fps | 96.7% |
| ADI AR 2208 | <<locked>> | 84% | 55,288 psi | 87% | 2943 fps | 100% |
| ADI AR 2209 | <<locked>> | 94% | 54,128 psi | 85% | 3015 fps | 98.1% |
| ADI AR 2213 | <<locked>> | 98% | 55,376 psi | 87% | 3068 fps | 97.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 56,362 psi | 88% | 2966 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 56,507 psi | 89% | 2989 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 92% | 57,566 psi | 90% | 3081 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 86% | 55,216 psi | 87% | 3048 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 96% | 57,116 psi | 90% | 3061 fps | 98.6% |
| Alliant Reloder-22 | <<locked>> | 98% | 54,795 psi | 86% | 3061 fps | 98.4% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 55,550 psi | 87% | 3048 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 48,008 psi | 75% | 2976 fps | 99.7% |
| Alliant Reloder-26 | <<locked>> | 96% | 56,086 psi | 88% | 3136 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 53,751 psi | 84% | 3045 fps | 98.2% |
| Bofors RP3 | <<locked>> | 84% | 57,479 psi | 90% | 2986 fps | 100% |
| Bofors RP5 | <<locked>> | 98% | 54,795 psi | 86% | 3061 fps | 98.4% |
| Bofors RP7 | <<locked>> | 88% | 56,594 psi | 89% | 2972 fps | 99.2% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 47,674 psi | 75% | 2913 fps | 96.3% |
| Hodgdon H380 | <<locked>> | 84% | 57,609 psi | 90% | 3002 fps | 100% |
| Hodgdon H414 | <<locked>> | 88% | 55,259 psi | 87% | 3022 fps | 99.4% |
| Hodgdon H4350 | <<locked>> | 86% | 54,578 psi | 86% | 2976 fps | 98.5% |
| Hodgdon H4831 | <<locked>> | 96% | 55,608 psi | 87% | 3009 fps | 96.7% |
| Hodgdon H4831 SC | <<locked>> | 96% | 54,476 psi | 85% | 2989 fps | 96.4% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 54,331 psi | 85% | 2949 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 47,079 psi | 74% | 3018 fps | 97.7% |
| Hodgdon Superformance | <<locked>> | 88% | 55,550 psi | 87% | 3058 fps | 99.3% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,738 psi | 58% | 1873 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 54,926 psi | 86% | 2927 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 57,246 psi | 90% | 2963 fps | 99.5% |
| IMR 4350 | <<locked>> | 90% | 54,230 psi | 85% | 2949 fps | 98.9% |
| IMR 4451 Enduron | <<locked>> | 86% | 54,549 psi | 85% | 2943 fps | 99.2% |
| IMR 4831 | <<locked>> | 92% | 57,363 psi | 90% | 3015 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 56,913 psi | 89% | 2999 fps | 97.1% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 56,623 psi | 89% | 3100 fps | 97.6% |
| Lovex S062 | <<locked>> | 82% | 55,143 psi | 86% | 2917 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 54,897 psi | 86% | 2940 fps | 99.8% |
| Lovex S070 | <<locked>> | 90% | 56,333 psi | 88% | 2986 fps | 99.5% |
| Lovex S071ᴾ | <<locked>> | 100% | 49,153 psi | 77% | 2881 fps | 99.2% |
| Norma 203B | <<locked>> | 82% | 55,825 psi | 87% | 2972 fps | 100% |
| Norma 204 | <<locked>> | 90% | 55,013 psi | 86% | 3005 fps | 98.1% |
| Norma MRP | <<locked>> | 96% | 54,447 psi | 85% | 3091 fps | 99.3% |
| Norma URP | <<locked>> | 90% | 55,376 psi | 87% | 3009 fps | 100% |
| Ramshot Big Game | <<locked>> | 82% | 56,855 psi | 89% | 3002 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 57,450 psi | 90% | 3123 fps | 98.1% |
| Ramshot Hunter | <<locked>> | 90% | 54,215 psi | 85% | 3005 fps | 99.7% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 51,503 psi | 81% | 2989 fps | 98.5% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,405 psi | 59% | 1916 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 57,464 psi | 90% | 2989 fps | 99.8% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 54,607 psi | 86% | 3038 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 56,826 psi | 89% | 3048 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 55,187 psi | 86% | 3077 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 47,369 psi | 74% | 3015 fps | 98.7% |
| Rottweil R 902 | <<locked>> | 82% | 56,956 psi | 89% | 2930 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 57,595 psi | 90% | 2979 fps | 100% |
| Rottweil R 904 | <<locked>> | 94% | 55,637 psi | 87% | 2986 fps | 97.4% |
| Rottweil R 905 | <<locked>> | 96% | 56,492 psi | 89% | 3045 fps | 98.7% |
| Rottweil R 907 | <<locked>> | 88% | 56,594 psi | 89% | 2972 fps | 99.2% |
| Shooters World Long Rifle | <<locked>> | 88% | 54,897 psi | 86% | 2940 fps | 99.8% |
| Shooters World Precision | <<locked>> | 82% | 55,143 psi | 86% | 2917 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 56,333 psi | 88% | 2986 fps | 99.5% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 55,550 psi | 87% | 2989 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 54,534 psi | 85% | 2812 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 54,549 psi | 85% | 2894 fps | 99.3% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 56,014 psi | 88% | 3041 fps | 98.6% |
| Somchem S355 | <<locked>> | 86% | 57,246 psi | 90% | 2972 fps | 100% |
| Somchem S361 | <<locked>> | 94% | 57,508 psi | 90% | 2976 fps | 97% |
| Somchem S365 | <<locked>> | 92% | 55,317 psi | 87% | 3012 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 57,217 psi | 90% | 3022 fps | 99.2% |
| Vihtavuori N135 | <<locked>> | 82% | 57,580 psi | 90% | 2884 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 57,682 psi | 90% | 2900 fps | 100% |
| Vihtavuori N150 | <<locked>> | 86% | 55,056 psi | 86% | 2897 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 57,406 psi | 90% | 3002 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 56,536 psi | 89% | 2995 fps | 98.9% |
| Vihtavuori N540 | <<locked>> | 82% | 55,927 psi | 88% | 2897 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 56,536 psi | 89% | 3005 fps | 100% |
| Vihtavuori N555 | <<locked>> | 96% | 54,491 psi | 85% | 3022 fps | 100% |
| Vihtavuori N560 | <<locked>> | 96% | 54,578 psi | 86% | 3077 fps | 96.8% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 50,314 psi | 79% | 2982 fps | 96.1% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 57,145 psi | 90% | 2963 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 55,477 psi | 87% | 3025 fps | 99.4% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 51,663 psi | 81% | 3117 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 57,435 psi | 90% | 3018 fps | 98.6% |
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 2700 | <<locked>> | 80% | 52,402 psi | 82% | 2867 fps | 98.5% |
| Accurate 3100 | <<locked>> | 84% | 34,171 psi | 54% | 2569 fps | 95.5% |
| Accurate 4064 | <<locked>> | 80% | 52,402 psi | 82% | 2861 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 40,466 psi | 63% | 2733 fps | 98.8% |
| Accurate MAGPRO | <<locked>> | 96% | 53,606 psi | 84% | 3061 fps | 95.9% |
| ADI AR 2208 | <<locked>> | 80% | 48,979 psi | 77% | 2835 fps | 100% |
| ADI AR 2209 | <<locked>> | 86% | 41,582 psi | 65% | 2769 fps | 95% |
| ADI AR 2213 | <<locked>> | 94% | 48,370 psi | 76% | 2936 fps | 95.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 49,719 psi | 78% | 2861 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 53,098 psi | 83% | 2933 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 39,030 psi | 61% | 2740 fps | 98.9% |
| Alliant Reloder-17 | <<locked>> | 80% | 44,614 psi | 70% | 2871 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 41,394 psi | 65% | 2762 fps | 95% |
| Alliant Reloder-22 | <<locked>> | 90% | 41,829 psi | 66% | 2815 fps | 95.3% |
| Alliant Reloder-23 | <<locked>> | 80% | 28,834 psi | 45% | 2487 fps | 97% |
| Alliant Reloder-25 | <<locked>> | 88% | 32,663 psi | 51% | 2608 fps | 95.3% |
| Alliant Reloder-26 | <<locked>> | 80% | 30,980 psi | 49% | 2602 fps | 95.4% |
| Bofors RP15 | <<locked>> | 94% | 44,208 psi | 69% | 2864 fps | 95.9% |
| Bofors RP3 | <<locked>> | 80% | 50,357 psi | 79% | 2874 fps | 100% |
| Bofors RP5 | <<locked>> | 90% | 41,829 psi | 66% | 2815 fps | 95.3% |
| Bofors RP7 | <<locked>> | 80% | 44,019 psi | 69% | 2746 fps | 97% |
| Hodgdon H1000 | <<locked>> | 98% | 44,425 psi | 70% | 2848 fps | 95.2% |
| Hodgdon H380 | <<locked>> | 80% | 50,575 psi | 79% | 2887 fps | 99.8% |
| Hodgdon H414 | <<locked>> | 80% | 42,279 psi | 66% | 2779 fps | 97.1% |
| Hodgdon H4350 | <<locked>> | 80% | 45,078 psi | 71% | 2799 fps | 96.5% |
| Hodgdon H4831 | <<locked>> | 94% | 51,851 psi | 81% | 2946 fps | 95.8% |
| Hodgdon H4831 SC | <<locked>> | 94% | 50,778 psi | 80% | 2927 fps | 95.5% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 36,680 psi | 57% | 2628 fps | 99.3% |
| Hodgdon Retumbo | <<locked>> | 96% | 41,263 psi | 65% | 2877 fps | 95.6% |
| Hodgdon Superformance | <<locked>> | 80% | 41,292 psi | 65% | 2792 fps | 96.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,470 psi | 43% | 1677 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 51,547 psi | 81% | 2871 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 53,650 psi | 84% | 2904 fps | 99.1% |
| IMR 4350 | <<locked>> | 80% | 39,508 psi | 62% | 2667 fps | 95.6% |
| IMR 4451 Enduron | <<locked>> | 80% | 45,368 psi | 71% | 2772 fps | 97.7% |
| IMR 4831 | <<locked>> | 80% | 38,769 psi | 61% | 2680 fps | 98.6% |
| IMR 4955 Enduron | <<locked>> | 92% | 50,328 psi | 79% | 2884 fps | 95.7% |
| IMR 7828 SSC | <<locked>> | 94% | 46,267 psi | 73% | 2907 fps | 95% |
| Lovex S062 | <<locked>> | 80% | 51,822 psi | 81% | 2867 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 42,989 psi | 67% | 2723 fps | 98.4% |
| Lovex S070 | <<locked>> | 80% | 41,263 psi | 65% | 2707 fps | 97% |
| Lovex S071 | <<locked>> | 88% | 33,301 psi | 52% | 2546 fps | 95.1% |
| Norma 203B | <<locked>> | 80% | 52,431 psi | 82% | 2920 fps | 100% |
| Norma 204 | <<locked>> | 82% | 41,945 psi | 66% | 2756 fps | 95% |
| Norma MRP | 73.1 gr | 86% | 38,305 psi | 60% | 2762 fps | 95.6% |
| Norma URP | <<locked>> | 80% | 40,001 psi | 63% | 2723 fps | 98.7% |
| Ramshot Big Game | <<locked>> | 80% | 52,982 psi | 83% | 2943 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 46,340 psi | 73% | 2920 fps | 95.5% |
| Ramshot Hunter | <<locked>> | 80% | 38,798 psi | 61% | 2707 fps | 96.9% |
| Ramshot Magnum | <<locked>> | 94% | 41,191 psi | 65% | 2789 fps | 96% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,978 psi | 44% | 1716 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 50,415 psi | 79% | 2871 fps | 99.1% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 47,369 psi | 74% | 2923 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 40,219 psi | 63% | 2749 fps | 98.6% |
| ReloadSwiss RS 70 | 69.4 gr | 80% | 38,740 psi | 61% | 2753 fps | 98% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 38,174 psi | 60% | 2795 fps | 95.6% |
| Rottweil R 902 | <<locked>> | 80% | 53,490 psi | 84% | 2877 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 47,456 psi | 74% | 2822 fps | 100% |
| Rottweil R 904 | <<locked>> | 88% | 45,963 psi | 72% | 2808 fps | 95.1% |
| Rottweil R 905 | <<locked>> | 88% | 43,395 psi | 68% | 2805 fps | 95.9% |
| Rottweil R 907 | <<locked>> | 80% | 44,019 psi | 69% | 2746 fps | 97% |
| Shooters World Long Rifle | <<locked>> | 80% | 42,989 psi | 67% | 2723 fps | 98.4% |
| Shooters World Precision | <<locked>> | 80% | 51,822 psi | 81% | 2867 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 41,263 psi | 65% | 2707 fps | 97% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 48,588 psi | 76% | 2874 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 48,138 psi | 75% | 2713 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 41,974 psi | 66% | 2664 fps | 97.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 43,033 psi | 67% | 2802 fps | 95.8% |
| Somchem S355 | <<locked>> | 80% | 47,587 psi | 75% | 2818 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 50,270 psi | 79% | 2858 fps | 95.4% |
| Somchem S365 | <<locked>> | 80% | 36,506 psi | 57% | 2677 fps | 99.9% |
| Somchem S385 | <<locked>> | 84% | 38,580 psi | 60% | 2671 fps | 95.3% |
| Vihtavuori N135 | <<locked>> | 80% | 54,012 psi | 85% | 2835 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 54,186 psi | 85% | 2851 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 45,484 psi | 71% | 2743 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 41,408 psi | 65% | 2723 fps | 98.9% |
| Vihtavuori N165 | <<locked>> | 90% | 40,553 psi | 64% | 2707 fps | 95.5% |
| Vihtavuori N540 | <<locked>> | 80% | 52,402 psi | 82% | 2844 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 40,828 psi | 64% | 2723 fps | 98.7% |
| Vihtavuori N555 | <<locked>> | 80% | 32,039 psi | 50% | 2566 fps | 97% |
| Vihtavuori N560 | 79.9 gr | 94% | 50,937 psi | 80% | 3012 fps | 95.9% |
| Vihtavuori N565 | <<locked>> | 98% | 46,920 psi | 74% | 2920 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 40,379 psi | 63% | 2687 fps | 99.9% |
| Winchester 760 | <<locked>> | 80% | 42,453 psi | 67% | 2782 fps | 97.1% |
| Winchester StaBALL HD | <<locked>> | 80% | 25,483 psi | 40% | 2454 fps | 95.7% |
| Winchester Supreme 780 | <<locked>> | 90% | 43,381 psi | 68% | 2772 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 93 powders for .300 Weath. Mag. loaded with the .3085 | 168gr | Prvi Partizan HP BT. Alliant Reloder-26 delivers the highest muzzle velocity at 3,136 fps; across all powders the maximum-charge window runs from 1,873 fps to 3,136 fps. ADI AR 2217 gives the best case fill at 100 %, and 93 of the 93 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 53–90 %, leaving at least 10 % headroom. The 168.0 gr projectile in 0.3085" calls for a 1:13.0 twist; slower twists will usually not stabilise this weight. ADI AR 2217, ADI AR 2225, Alliant Reloder-23 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, ReloadSwiss RS 70 rank at the top here: for .300 Weath. Mag. with the .3085 | 168gr | Prvi Partizan HP BT they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, ADI AR 2217, Baschieri & Pellagri 109, Norma 217 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.