Load Specifications
Load data in caliber .300 Win. Mag. with .3085 | 180gr | Prvi Partizan SP bullet and 85 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-26, Norma MRP 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% | 54,273 psi | 87% | 2772 fps | 98.8% |
| Accurate 3100ᴾ | <<locked>> | 100% | 56,304 psi | 90% | 2877 fps | 99.9% |
| Accurate 4064 | <<locked>> | 82% | 53,795 psi | 86% | 2759 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 54,679 psi | 88% | 2871 fps | 100% |
| Accurate MAGPRO | <<locked>> | 98% | 54,607 psi | 88% | 2959 fps | 96.3% |
| ADI AR 2208 | <<locked>> | 84% | 53,737 psi | 86% | 2789 fps | 100% |
| ADI AR 2209 | <<locked>> | 96% | 55,608 psi | 89% | 2913 fps | 98.5% |
| ADI AR 2213 | <<locked>> | 98% | 53,084 psi | 85% | 2904 fps | 96.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 54,578 psi | 88% | 2812 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 54,868 psi | 88% | 2838 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 92% | 55,347 psi | 89% | 2923 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 86% | 52,750 psi | 85% | 2890 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 96% | 54,752 psi | 88% | 2897 fps | 98.4% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 55,869 psi | 90% | 2959 fps | 98.7% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 52,924 psi | 85% | 2890 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 45,905 psi | 74% | 2822 fps | 99.5% |
| Alliant Reloder-26 | <<locked>> | 96% | 52,968 psi | 85% | 2976 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 51,242 psi | 82% | 2884 fps | 97.9% |
| Bofors RP3 | <<locked>> | 84% | 55,434 psi | 89% | 2831 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 55,869 psi | 90% | 2959 fps | 98.7% |
| Bofors RP7 | <<locked>> | 88% | 54,737 psi | 88% | 2818 fps | 99% |
| Hodgdon H380 | <<locked>> | 84% | 55,753 psi | 89% | 2848 fps | 100% |
| Hodgdon H414 | <<locked>> | 88% | 53,098 psi | 85% | 2864 fps | 99.2% |
| Hodgdon H4350 | <<locked>> | 88% | 56,304 psi | 90% | 2877 fps | 98.8% |
| Hodgdon H4831 | <<locked>> | 96% | 53,316 psi | 85% | 2851 fps | 96.3% |
| Hodgdon H4831 SC | <<locked>> | 98% | 55,738 psi | 89% | 2890 fps | 96.8% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 55,753 psi | 89% | 2848 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 44,933 psi | 72% | 2854 fps | 97.2% |
| Hodgdon Superformance | <<locked>> | 88% | 53,040 psi | 85% | 2897 fps | 99.1% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,550 psi | 59% | 1768 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 53,272 psi | 85% | 2776 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 55,477 psi | 89% | 2805 fps | 99.4% |
| IMR 4350 | <<locked>> | 92% | 55,796 psi | 89% | 2851 fps | 99.2% |
| IMR 4451 Enduron | <<locked>> | 88% | 56,260 psi | 90% | 2841 fps | 99.4% |
| IMR 4831 | <<locked>> | 92% | 54,969 psi | 88% | 2861 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 56,304 psi | 90% | 2864 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 55,013 psi | 88% | 2841 fps | 96.8% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 54,157 psi | 87% | 2936 fps | 97.2% |
| Lovex S062 | <<locked>> | 82% | 53,476 psi | 86% | 2769 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 53,229 psi | 85% | 2789 fps | 99.8% |
| Lovex S070 | <<locked>> | 90% | 54,563 psi | 87% | 2831 fps | 99.4% |
| Lovex S071ᴾ | <<locked>> | 100% | 46,876 psi | 75% | 2726 fps | 99% |
| Norma 203B | <<locked>> | 82% | 54,172 psi | 87% | 2822 fps | 100% |
| Norma 204 | <<locked>> | 90% | 53,055 psi | 85% | 2848 fps | 97.9% |
| Norma MRP | <<locked>> | 98% | 55,622 psi | 89% | 2989 fps | 99.5% |
| Norma URP | <<locked>> | 90% | 53,403 psi | 86% | 2854 fps | 100% |
| Ramshot Big Game | <<locked>> | 82% | 54,723 psi | 88% | 2848 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 54,766 psi | 88% | 2956 fps | 97.7% |
| Ramshot Hunter | <<locked>> | 92% | 55,637 psi | 89% | 2910 fps | 99.8% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 48,863 psi | 78% | 2828 fps | 98.1% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,289 psi | 60% | 1811 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 55,492 psi | 89% | 2831 fps | 99.7% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 56,043 psi | 90% | 2936 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 54,491 psi | 87% | 2894 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 52,721 psi | 85% | 2913 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 45,034 psi | 72% | 2851 fps | 98.3% |
| Rottweil R 902 | <<locked>> | 82% | 55,463 psi | 89% | 2779 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 55,521 psi | 89% | 2825 fps | 100% |
| Rottweil R 904 | <<locked>> | 94% | 53,679 psi | 86% | 2828 fps | 97.1% |
| Rottweil R 905 | <<locked>> | 96% | 54,143 psi | 87% | 2887 fps | 98.4% |
| Rottweil R 907 | <<locked>> | 88% | 54,737 psi | 88% | 2818 fps | 99% |
| Shooters World Long Rifle | <<locked>> | 88% | 53,229 psi | 85% | 2789 fps | 99.8% |
| Shooters World Precision | <<locked>> | 82% | 53,476 psi | 86% | 2769 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 54,563 psi | 87% | 2831 fps | 99.4% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 53,606 psi | 86% | 2835 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 52,895 psi | 85% | 2664 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 56,101 psi | 90% | 2795 fps | 99.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 53,679 psi | 86% | 2884 fps | 98.3% |
| Somchem S355 | <<locked>> | 86% | 55,376 psi | 89% | 2822 fps | 100% |
| Somchem S361 | <<locked>> | 94% | 55,259 psi | 89% | 2822 fps | 96.6% |
| Somchem S365 | <<locked>> | 92% | 52,779 psi | 85% | 2858 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 54,781 psi | 88% | 2864 fps | 99% |
| Vihtavuori N135 | <<locked>> | 82% | 55,709 psi | 89% | 2736 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 55,956 psi | 90% | 2753 fps | 100% |
| Vihtavuori N150 | <<locked>> | 86% | 53,229 psi | 85% | 2746 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 55,390 psi | 89% | 2848 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 54,056 psi | 87% | 2838 fps | 98.7% |
| Vihtavuori N540 | <<locked>> | 82% | 54,172 psi | 87% | 2749 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 54,404 psi | 87% | 2851 fps | 100% |
| Vihtavuori N555 | <<locked>> | 98% | 55,448 psi | 89% | 2917 fps | 100% |
| Vihtavuori N560 | <<locked>> | 98% | 55,825 psi | 90% | 2979 fps | 97.2% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 54,911 psi | 88% | 2812 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 53,345 psi | 86% | 2867 fps | 99.3% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 48,167 psi | 77% | 2953 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 54,897 psi | 88% | 2858 fps | 98.3% |
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% | 50,705 psi | 81% | 2717 fps | 98.3% |
| Accurate 3100 | <<locked>> | 84% | 32,677 psi | 52% | 2434 fps | 95.2% |
| Accurate 4064 | <<locked>> | 80% | 50,647 psi | 81% | 2713 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 38,885 psi | 62% | 2589 fps | 98.7% |
| Accurate MAGPRO | <<locked>> | 96% | 50,807 psi | 81% | 2894 fps | 95.4% |
| ADI AR 2208 | <<locked>> | 80% | 47,456 psi | 76% | 2687 fps | 99.9% |
| ADI AR 2209 | <<locked>> | 88% | 42,830 psi | 69% | 2684 fps | 95.6% |
| ADI AR 2213 | <<locked>> | 94% | 46,456 psi | 74% | 2782 fps | 95.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 48,153 psi | 77% | 2713 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 51,445 psi | 82% | 2782 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 37,608 psi | 60% | 2595 fps | 98.8% |
| Alliant Reloder-17 | <<locked>> | 80% | 42,830 psi | 69% | 2720 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 42,395 psi | 68% | 2674 fps | 95.6% |
| Alliant Reloder-22 | <<locked>> | 90% | 40,001 psi | 64% | 2667 fps | 95% |
| Alliant Reloder-23 | <<locked>> | 80% | 27,702 psi | 44% | 2356 fps | 96.8% |
| Alliant Reloder-25 | <<locked>> | 88% | 31,444 psi | 50% | 2477 fps | 95% |
| Alliant Reloder-26 | 63.8 gr | 80% | 29,544 psi | 47% | 2461 fps | 95% |
| Bofors RP15 | <<locked>> | 94% | 42,192 psi | 68% | 2713 fps | 95.6% |
| Bofors RP3 | <<locked>> | 80% | 48,617 psi | 78% | 2726 fps | 100% |
| Bofors RP5 | <<locked>> | 90% | 40,001 psi | 64% | 2667 fps | 95% |
| Bofors RP7 | <<locked>> | 80% | 42,699 psi | 68% | 2602 fps | 96.8% |
| Hodgdon H380 | <<locked>> | 80% | 48,965 psi | 79% | 2740 fps | 99.7% |
| Hodgdon H414 | <<locked>> | 80% | 40,683 psi | 65% | 2635 fps | 96.9% |
| Hodgdon H4350 | <<locked>> | 80% | 43,540 psi | 70% | 2654 fps | 96.3% |
| Hodgdon H4831 | <<locked>> | 94% | 49,879 psi | 80% | 2792 fps | 95.5% |
| Hodgdon H4831 SC | <<locked>> | 94% | 48,747 psi | 78% | 2772 fps | 95.2% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 35,157 psi | 56% | 2490 fps | 99.2% |
| Hodgdon Retumbo | <<locked>> | 96% | 39,450 psi | 63% | 2723 fps | 95.1% |
| Hodgdon Superformance | <<locked>> | 80% | 39,581 psi | 63% | 2644 fps | 96.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,325 psi | 44% | 1581 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 49,922 psi | 80% | 2720 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 52,069 psi | 83% | 2749 fps | 99% |
| IMR 4350 | <<locked>> | 80% | 38,203 psi | 61% | 2526 fps | 95.4% |
| IMR 4451 Enduron | <<locked>> | 80% | 44,106 psi | 71% | 2631 fps | 97.6% |
| IMR 4831 | <<locked>> | 80% | 37,289 psi | 60% | 2543 fps | 98.4% |
| IMR 4895 | <<locked>> | 80% | 52,794 psi | 85% | 2808 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 48,428 psi | 78% | 2730 fps | 95.3% |
| IMR 7828 SSC | <<locked>> | 96% | 47,543 psi | 76% | 2815 fps | 95.6% |
| Lovex S062 | <<locked>> | 80% | 50,372 psi | 81% | 2720 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 41,626 psi | 67% | 2582 fps | 98.2% |
| Lovex S070 | <<locked>> | 80% | 39,784 psi | 64% | 2562 fps | 96.8% |
| Lovex S071 | <<locked>> | 90% | 34,055 psi | 55% | 2467 fps | 95.7% |
| Norma 203B | <<locked>> | 80% | 50,807 psi | 81% | 2769 fps | 100% |
| Norma 204 | <<locked>> | 84% | 43,265 psi | 69% | 2671 fps | 95.6% |
| Norma MRP | 66.6 gr | 86% | 36,666 psi | 59% | 2618 fps | 95.3% |
| Norma URP | <<locked>> | 80% | 38,464 psi | 62% | 2579 fps | 98.5% |
| Ramshot Big Game | <<locked>> | 80% | 51,097 psi | 82% | 2792 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 44,251 psi | 71% | 2762 fps | 95% |
| Ramshot Hunter | <<locked>> | 80% | 37,318 psi | 60% | 2569 fps | 96.7% |
| Ramshot Magnum | <<locked>> | 94% | 39,276 psi | 63% | 2638 fps | 95.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,876 psi | 45% | 1617 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 48,907 psi | 78% | 2723 fps | 99% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 45,498 psi | 73% | 2772 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 38,537 psi | 62% | 2605 fps | 98.4% |
| ReloadSwiss RS 70 | 63.2 gr | 80% | 37,231 psi | 60% | 2608 fps | 97.8% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 36,492 psi | 59% | 2644 fps | 95% |
| Rottweil R 902 | <<locked>> | 80% | 51,967 psi | 83% | 2726 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 45,774 psi | 73% | 2674 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 47,137 psi | 76% | 2713 fps | 95.6% |
| Rottweil R 905 | <<locked>> | 88% | 41,553 psi | 67% | 2657 fps | 95.6% |
| Rottweil R 907 | <<locked>> | 80% | 42,699 psi | 68% | 2602 fps | 96.8% |
| Shooters World Long Rifle | <<locked>> | 80% | 41,626 psi | 67% | 2582 fps | 98.2% |
| Shooters World Precision | <<locked>> | 80% | 50,372 psi | 81% | 2720 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 39,784 psi | 64% | 2562 fps | 96.8% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 46,905 psi | 75% | 2726 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 46,760 psi | 75% | 2575 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 40,683 psi | 65% | 2526 fps | 96.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 41,176 psi | 66% | 2654 fps | 95.4% |
| Somchem S355 | <<locked>> | 80% | 46,035 psi | 74% | 2674 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 48,327 psi | 77% | 2707 fps | 95% |
| Somchem S365 | <<locked>> | 80% | 34,940 psi | 56% | 2539 fps | 99.8% |
| Somchem S385 | <<locked>> | 84% | 37,014 psi | 59% | 2530 fps | 95% |
| Vihtavuori N135 | <<locked>> | 80% | 52,373 psi | 84% | 2690 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 52,518 psi | 84% | 2707 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 43,903 psi | 70% | 2602 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 39,943 psi | 64% | 2582 fps | 98.8% |
| Vihtavuori N165 | <<locked>> | 90% | 38,914 psi | 62% | 2566 fps | 95.2% |
| Vihtavuori N540 | <<locked>> | 80% | 50,879 psi | 82% | 2703 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 39,421 psi | 63% | 2582 fps | 98.5% |
| Vihtavuori N555 | <<locked>> | 80% | 30,647 psi | 49% | 2431 fps | 96.9% |
| Vihtavuori N560 | <<locked>> | 94% | 48,675 psi | 78% | 2854 fps | 95.5% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 38,972 psi | 62% | 2549 fps | 99.9% |
| Winchester 760 | <<locked>> | 80% | 40,843 psi | 65% | 2638 fps | 96.9% |
| Winchester StaBALL HD | <<locked>> | 80% | 24,468 psi | 39% | 2323 fps | 95.3% |
| Winchester Supreme 780 | <<locked>> | 90% | 41,510 psi | 67% | 2625 fps | 95.3% |
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 Win. Mag. loaded with the .3085 | 180gr | Prvi Partizan SP. Norma MRP delivers the highest muzzle velocity at 2,989 fps; across all powders the maximum-charge window runs from 1,768 fps to 2,989 fps. Accurate 3100 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 (430 MPa), the top charges use 51–90 %, 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. Accurate 3100, ADI AR 2217, ADI AR 2225 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. Alliant Reloder-26, Norma MRP, ReloadSwiss RS 70 rank at the top here: for .300 Win. Mag. with the .3085 | 180gr | Prvi Partizan SP they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, ADI AR 2217, Baschieri & Pellagri 109, Bofors RP30 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.