Load Specifications
Load data in caliber .300 Rem. Ultra Mag. with .311 | 190gr | Prvi Partizan FMJ BT bullet and 68 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Hodgdon Retumbo, ReloadSwiss RS 76 and ReloadSwiss RS 80.
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>> | 90% | 57,899 psi | 89% | 2776 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 58,276 psi | 90% | 2799 fps | 100% |
| Accurate MAGPRO | <<locked>> | 88% | 56,840 psi | 87% | 2881 fps | 99.2% |
| ADI AR 2209 | <<locked>> | 86% | 55,463 psi | 85% | 2812 fps | 99.9% |
| ADI AR 2213 | <<locked>> | 90% | 57,566 psi | 89% | 2877 fps | 99.8% |
| ADI AR 2217 | <<locked>> | 98% | 55,970 psi | 86% | 2844 fps | 99.9% |
| ADI AR 2218ᴾ | <<locked>> | 100% | 52,576 psi | 81% | 2884 fps | 97.3% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 54,621 psi | 84% | 2867 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 86% | 55,622 psi | 86% | 2808 fps | 99.9% |
| Alliant Power Pro Varmint | <<locked>> | 86% | 55,622 psi | 86% | 2808 fps | 99.9% |
| Alliant Reloder-16 | <<locked>> | 82% | 55,521 psi | 85% | 2802 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 55,027 psi | 85% | 2802 fps | 99.9% |
| Alliant Reloder-22 | <<locked>> | 90% | 57,899 psi | 89% | 2871 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 90% | 55,869 psi | 86% | 2782 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 94% | 55,869 psi | 86% | 2848 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 86% | 56,623 psi | 87% | 2867 fps | 100% |
| Alliant Reloder-33ᴾ | <<locked>> | 100% | 58,175 psi | 90% | 2933 fps | 98.4% |
| Baschieri & Pellagri 109 | <<locked>> | 92% | 58,291 psi | 90% | 2835 fps | 98.4% |
| Bofors RP15 | <<locked>> | 92% | 57,058 psi | 88% | 2858 fps | 100% |
| Bofors RP30 | <<locked>> | 96% | 55,854 psi | 86% | 2861 fps | 99.9% |
| Bofors RP5 | <<locked>> | 90% | 57,899 psi | 89% | 2871 fps | 100% |
| Hodgdon H1000 | <<locked>> | 96% | 57,595 psi | 89% | 2867 fps | 100% |
| Hodgdon H4831 | <<locked>> | 88% | 56,855 psi | 88% | 2812 fps | 99.4% |
| Hodgdon H4831 SC | <<locked>> | 88% | 55,622 psi | 86% | 2795 fps | 99.3% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 55,695 psi | 86% | 2726 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 94% | 54,940 psi | 85% | 2930 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,478 psi | 58% | 1804 fps | 100% |
| IMR 4350 | <<locked>> | 84% | 57,754 psi | 89% | 2785 fps | 100% |
| IMR 4831 | <<locked>> | 84% | 58,392 psi | 90% | 2785 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 88% | 57,203 psi | 88% | 2792 fps | 99.5% |
| IMR 7828 SSC | <<locked>> | 90% | 55,869 psi | 86% | 2861 fps | 99.7% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 50,038 psi | 77% | 2789 fps | 99.3% |
| Lovex S065 | <<locked>> | 82% | 57,885 psi | 89% | 2762 fps | 100% |
| Lovex S070 | <<locked>> | 82% | 56,507 psi | 87% | 2766 fps | 100% |
| Lovex S071 | <<locked>> | 94% | 55,825 psi | 86% | 2749 fps | 100% |
| Norma 204 | <<locked>> | 82% | 55,434 psi | 85% | 2789 fps | 99.9% |
| Norma 217ᴾ | <<locked>> | 100% | 50,894 psi | 78% | 2808 fps | 100% |
| Norma MRP | <<locked>> | 88% | 58,102 psi | 89% | 2887 fps | 100% |
| Norma URP | <<locked>> | 82% | 56,391 psi | 87% | 2782 fps | 100% |
| Ramshot Grand | <<locked>> | 90% | 56,971 psi | 88% | 2877 fps | 99.9% |
| Ramshot Hunter | <<locked>> | 82% | 55,405 psi | 85% | 2789 fps | 100% |
| Ramshot Magnum | <<locked>> | 92% | 55,579 psi | 86% | 2808 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,406 psi | 59% | 1847 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 58,479 psi | 90% | 2822 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 82% | 57,217 psi | 88% | 2848 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 55,999 psi | 86% | 2920 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 96% | 55,303 psi | 85% | 2881 fps | 99.3% |
| Rottweil R 904 | <<locked>> | 86% | 56,144 psi | 86% | 2782 fps | 99.6% |
| Rottweil R 905 | <<locked>> | 88% | 58,392 psi | 90% | 2841 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 82% | 57,885 psi | 89% | 2762 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 56,507 psi | 87% | 2766 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 57,043 psi | 88% | 2723 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 57,986 psi | 89% | 2841 fps | 100% |
| Somchem S361 | <<locked>> | 86% | 57,696 psi | 89% | 2769 fps | 99.5% |
| Somchem S365 | <<locked>> | 84% | 57,667 psi | 89% | 2782 fps | 100% |
| Somchem S385 | <<locked>> | 88% | 58,784 psi | 90% | 2812 fps | 100% |
| Vihtavuori N160 | <<locked>> | 82% | 57,885 psi | 89% | 2769 fps | 100% |
| Vihtavuori N165 | <<locked>> | 90% | 54,998 psi | 85% | 2746 fps | 100% |
| Vihtavuori N170 | <<locked>> | 96% | 57,914 psi | 89% | 2815 fps | 96.7% |
| Vihtavuori N550 | <<locked>> | 82% | 57,276 psi | 88% | 2779 fps | 100% |
| Vihtavuori N555 | <<locked>> | 88% | 57,885 psi | 89% | 2812 fps | 100% |
| Vihtavuori N560 | <<locked>> | 88% | 57,580 psi | 89% | 2890 fps | 99.6% |
| Vihtavuori N565 | <<locked>> | 94% | 58,378 psi | 90% | 2877 fps | 99.8% |
| Vihtavuori N568 | <<locked>> | 96% | 55,840 psi | 86% | 2881 fps | 99% |
| Vihtavuori N570 | <<locked>> | 98% | 57,058 psi | 88% | 2940 fps | 97.8% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 57,537 psi | 89% | 2720 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 90% | 55,434 psi | 85% | 2864 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 88% | 54,940 psi | 85% | 2756 fps | 99.9% |
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% | 41,205 psi | 63% | 2520 fps | 99.7% |
| Accurate 4350 | <<locked>> | 80% | 54,331 psi | 84% | 2746 fps | 100% |
| Accurate MAGPRO | <<locked>> | 80% | 42,656 psi | 66% | 2635 fps | 96.4% |
| ADI AR 2209 | <<locked>> | 80% | 45,165 psi | 70% | 2644 fps | 98.9% |
| ADI AR 2213 | <<locked>> | 80% | 40,640 psi | 63% | 2585 fps | 96.9% |
| ADI AR 2217 | <<locked>> | 84% | 34,621 psi | 53% | 2448 fps | 95% |
| ADI AR 2218 | <<locked>> | 96% | 45,426 psi | 70% | 2743 fps | 95% |
| ADI AR 2225 | <<locked>> | 82% | 29,544 psi | 45% | 2356 fps | 95.9% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 45,542 psi | 70% | 2644 fps | 99% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 45,542 psi | 70% | 2644 fps | 99% |
| Alliant Reloder-16 | <<locked>> | 80% | 51,953 psi | 80% | 2753 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 45,121 psi | 69% | 2638 fps | 98.9% |
| Alliant Reloder-22 | <<locked>> | 80% | 41,307 psi | 64% | 2592 fps | 98.3% |
| Alliant Reloder-23 | <<locked>> | 80% | 39,885 psi | 61% | 2539 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 34,432 psi | 53% | 2474 fps | 99.2% |
| Alliant Reloder-26 | <<locked>> | 80% | 45,078 psi | 69% | 2694 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 94% | 46,296 psi | 71% | 2740 fps | 95.6% |
| Baschieri & Pellagri 109 | <<locked>> | 84% | 45,150 psi | 69% | 2615 fps | 95.3% |
| Bofors RP15 | <<locked>> | 80% | 38,290 psi | 59% | 2530 fps | 97.3% |
| Bofors RP30 | <<locked>> | 82% | 34,360 psi | 53% | 2461 fps | 95.2% |
| Bofors RP5 | <<locked>> | 80% | 41,307 psi | 64% | 2592 fps | 98.3% |
| Hodgdon H1000 | <<locked>> | 82% | 35,143 psi | 54% | 2461 fps | 96% |
| Hodgdon H4831 | <<locked>> | 80% | 43,105 psi | 66% | 2585 fps | 97% |
| Hodgdon H4831 SC | <<locked>> | 80% | 42,482 psi | 65% | 2572 fps | 96.8% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 48,849 psi | 75% | 2631 fps | 100% |
| Hodgdon Retumbo | 74.5 gr | 80% | 33,634 psi | 52% | 2503 fps | 96.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,166 psi | 43% | 1617 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 50,821 psi | 78% | 2687 fps | 99.9% |
| IMR 4831 | <<locked>> | 80% | 51,401 psi | 79% | 2694 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 44,266 psi | 68% | 2579 fps | 97.4% |
| IMR 7828 SSC | <<locked>> | 80% | 39,305 psi | 60% | 2569 fps | 96.6% |
| IMR 8133 Enduron | <<locked>> | 90% | 35,346 psi | 54% | 2500 fps | 95.5% |
| Lovex S065 | <<locked>> | 80% | 54,404 psi | 84% | 2717 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 52,881 psi | 81% | 2713 fps | 100% |
| Lovex S071 | <<locked>> | 80% | 35,491 psi | 55% | 2405 fps | 98.7% |
| Norma 204 | <<locked>> | 80% | 51,793 psi | 80% | 2736 fps | 99.6% |
| Norma 217 | <<locked>> | 86% | 30,995 psi | 48% | 2411 fps | 96% |
| Norma MRP | <<locked>> | 80% | 43,743 psi | 67% | 2661 fps | 99.6% |
| Norma URP | <<locked>> | 80% | 52,692 psi | 81% | 2730 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 39,117 psi | 60% | 2572 fps | 96.9% |
| Ramshot Hunter | <<locked>> | 80% | 51,851 psi | 80% | 2736 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 35,259 psi | 54% | 2457 fps | 97.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,906 psi | 44% | 1657 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 54,665 psi | 84% | 2769 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 53,127 psi | 82% | 2792 fps | 100% |
| ReloadSwiss RS 76 | 79.8 gr | 80% | 32,953 psi | 51% | 2477 fps | 97.6% |
| ReloadSwiss RS 80 | 88.5 gr | 88% | 40,640 psi | 63% | 2625 fps | 96.1% |
| Rottweil R 904 | <<locked>> | 80% | 46,180 psi | 71% | 2621 fps | 98.3% |
| Rottweil R 905 | <<locked>> | 80% | 44,773 psi | 69% | 2631 fps | 99% |
| Shooters World Long Rifle | <<locked>> | 80% | 54,404 psi | 84% | 2717 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 52,881 psi | 81% | 2713 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 53,359 psi | 82% | 2671 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 44,425 psi | 68% | 2625 fps | 98.9% |
| Somchem S361 | <<locked>> | 80% | 47,195 psi | 73% | 2608 fps | 97.9% |
| Somchem S365 | <<locked>> | 80% | 50,328 psi | 77% | 2684 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 45,324 psi | 70% | 2608 fps | 99.5% |
| Vihtavuori N160 | <<locked>> | 80% | 54,114 psi | 83% | 2720 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 39,349 psi | 61% | 2487 fps | 98.2% |
| Vihtavuori N170 | <<locked>> | 92% | 50,633 psi | 78% | 2700 fps | 95% |
| Vihtavuori N550 | <<locked>> | 80% | 53,621 psi | 83% | 2726 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 44,469 psi | 68% | 2615 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 43,526 psi | 67% | 2654 fps | 97.3% |
| Vihtavuori N565 | <<locked>> | 80% | 36,056 psi | 55% | 2477 fps | 95% |
| Vihtavuori N568 | <<locked>> | 88% | 41,742 psi | 64% | 2638 fps | 95.8% |
| Vihtavuori N570 | <<locked>> | 92% | 45,818 psi | 71% | 2749 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 53,679 psi | 83% | 2674 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 80% | 37,666 psi | 58% | 2589 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 41,539 psi | 64% | 2536 fps | 98.3% |
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 68 powders for .300 Rem. Ultra Mag. loaded with the .311 | 190gr | Prvi Partizan FMJ BT. Vihtavuori N570 delivers the highest muzzle velocity at 2,940 fps; across all powders the maximum-charge window runs from 1,804 fps to 2,940 fps. ADI AR 2218 gives the best case fill at 100 %, and 68 of the 68 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (448 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 2218, ADI AR 2225, Alliant Reloder-33 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. Hodgdon Retumbo, ReloadSwiss RS 76, ReloadSwiss RS 80 rank at the top here: for .300 Rem. Ultra 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.