Load Specifications
Load data in caliber .300 Rem. Ultra Mag. with .308 | 200gr | Norma VULKAN bullet and 56 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>> | 88% | 57,261 psi | 88% | 2710 fps | 100% |
| Accurate MAGPRO | <<locked>> | 86% | 56,188 psi | 86% | 2812 fps | 99.5% |
| ADI AR 2209 | <<locked>> | 86% | 58,218 psi | 90% | 2792 fps | 100% |
| ADI AR 2213 | <<locked>> | 88% | 56,898 psi | 88% | 2812 fps | 99.9% |
| ADI AR 2217 | <<locked>> | 96% | 55,579 psi | 86% | 2785 fps | 100% |
| ADI AR 2218ᴾ | <<locked>> | 100% | 56,188 psi | 86% | 2897 fps | 98.7% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 58,334 psi | 90% | 2854 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 82% | 58,436 psi | 90% | 2779 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 57,885 psi | 89% | 2782 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 88% | 57,348 psi | 88% | 2805 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 88% | 55,434 psi | 85% | 2717 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 92% | 55,564 psi | 86% | 2782 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 84% | 55,970 psi | 86% | 2795 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 98% | 58,015 psi | 89% | 2877 fps | 98.8% |
| Alliant Reloder-50ᴾ | <<locked>> | 100% | 53,374 psi | 82% | 2799 fps | 97.6% |
| Baschieri & Pellagri 109 | <<locked>> | 90% | 57,246 psi | 88% | 2769 fps | 98.7% |
| Bofors RP15 | <<locked>> | 90% | 56,536 psi | 87% | 2792 fps | 100% |
| Bofors RP30 | <<locked>> | 94% | 55,521 psi | 85% | 2799 fps | 100% |
| Bofors RP5 | <<locked>> | 88% | 57,348 psi | 88% | 2805 fps | 100% |
| Hodgdon H1000 | <<locked>> | 94% | 57,203 psi | 88% | 2805 fps | 100% |
| Hodgdon H4831 | <<locked>> | 86% | 55,883 psi | 86% | 2743 fps | 99.6% |
| Hodgdon H4831 SC | <<locked>> | 88% | 58,726 psi | 90% | 2785 fps | 99.8% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 58,508 psi | 90% | 2700 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 92% | 54,781 psi | 84% | 2864 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,724 psi | 58% | 1772 fps | 100% |
| IMR 4350 | <<locked>> | 82% | 56,739 psi | 87% | 2717 fps | 100% |
| IMR 4831 | <<locked>> | 82% | 57,537 psi | 89% | 2717 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 86% | 56,144 psi | 86% | 2723 fps | 99.7% |
| IMR 7828 SSC | <<locked>> | 88% | 55,187 psi | 85% | 2792 fps | 99.8% |
| IMR 7977 Enduron | <<locked>> | 94% | 58,392 psi | 90% | 2720 fps | 95.8% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 53,563 psi | 82% | 2785 fps | 99.9% |
| Lovex S071 | <<locked>> | 92% | 55,259 psi | 85% | 2684 fps | 100% |
| Norma 204 | <<locked>> | 82% | 58,102 psi | 89% | 2772 fps | 100% |
| Norma 217ᴾ | <<locked>> | 100% | 54,665 psi | 84% | 2805 fps | 100% |
| Norma MRP | <<locked>> | 86% | 57,479 psi | 88% | 2818 fps | 100% |
| Ramshot Grand | <<locked>> | 88% | 56,376 psi | 87% | 2812 fps | 100% |
| Ramshot Hunter | <<locked>> | 82% | 58,102 psi | 89% | 2766 fps | 100% |
| Ramshot Magnum | <<locked>> | 90% | 54,926 psi | 85% | 2743 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,682 psi | 60% | 1811 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 92% | 55,637 psi | 86% | 2851 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 94% | 55,027 psi | 85% | 2818 fps | 99.5% |
| Rottweil R 904 | <<locked>> | 86% | 58,697 psi | 90% | 2762 fps | 99.9% |
| Rottweil R 905 | <<locked>> | 86% | 57,711 psi | 89% | 2776 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 57,319 psi | 88% | 2772 fps | 100% |
| Somchem S361 | <<locked>> | 84% | 56,449 psi | 87% | 2700 fps | 99.6% |
| Somchem S365 | <<locked>> | 82% | 57,000 psi | 88% | 2710 fps | 100% |
| Somchem S385 | <<locked>> | 86% | 58,088 psi | 89% | 2746 fps | 100% |
| Vihtavuori N165 | <<locked>> | 90% | 57,914 psi | 89% | 2730 fps | 100% |
| Vihtavuori N170 | <<locked>> | 94% | 57,145 psi | 88% | 2753 fps | 97.2% |
| Vihtavuori N555 | <<locked>> | 86% | 57,217 psi | 88% | 2743 fps | 100% |
| Vihtavuori N560 | <<locked>> | 86% | 56,840 psi | 87% | 2822 fps | 99.8% |
| Vihtavuori N565 | <<locked>> | 92% | 57,928 psi | 89% | 2815 fps | 99.9% |
| Vihtavuori N568 | <<locked>> | 94% | 55,492 psi | 85% | 2822 fps | 99.3% |
| Vihtavuori N570 | <<locked>> | 96% | 56,811 psi | 87% | 2881 fps | 98.3% |
| Winchester StaBALL HD | <<locked>> | 88% | 55,506 psi | 85% | 2799 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 88% | 57,827 psi | 89% | 2743 fps | 100% |
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% | 43,584 psi | 67% | 2510 fps | 100% |
| Accurate MAGPRO | <<locked>> | 80% | 45,382 psi | 70% | 2635 fps | 97.7% |
| ADI AR 2209 | <<locked>> | 80% | 47,616 psi | 73% | 2631 fps | 99.6% |
| ADI AR 2213 | <<locked>> | 80% | 42,830 psi | 66% | 2579 fps | 98.1% |
| ADI AR 2217 | <<locked>> | 82% | 34,287 psi | 53% | 2392 fps | 95.7% |
| ADI AR 2218 | <<locked>> | 94% | 45,020 psi | 69% | 2690 fps | 95.8% |
| ADI AR 2225 | <<locked>> | 80% | 29,327 psi | 45% | 2306 fps | 96.6% |
| Alliant Reloder-16 | <<locked>> | 80% | 54,810 psi | 84% | 2730 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 47,514 psi | 73% | 2625 fps | 99.6% |
| Alliant Reloder-22 | <<locked>> | 80% | 43,584 psi | 67% | 2585 fps | 99.1% |
| Alliant Reloder-23 | <<locked>> | 80% | 42,424 psi | 65% | 2530 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 36,695 psi | 56% | 2474 fps | 99.8% |
| Alliant Reloder-26 | <<locked>> | 80% | 48,240 psi | 74% | 2687 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 90% | 42,743 psi | 66% | 2621 fps | 95.2% |
| Alliant Reloder-50 | <<locked>> | 96% | 45,832 psi | 71% | 2671 fps | 95.6% |
| Baschieri & Pellagri 109 | <<locked>> | 82% | 44,266 psi | 68% | 2552 fps | 95.8% |
| Bofors RP15 | <<locked>> | 80% | 40,625 psi | 63% | 2526 fps | 98.5% |
| Bofors RP30 | <<locked>> | 80% | 34,200 psi | 53% | 2408 fps | 95.9% |
| Bofors RP5 | <<locked>> | 80% | 43,584 psi | 67% | 2585 fps | 99.1% |
| Hodgdon H1000 | <<locked>> | 80% | 34,795 psi | 54% | 2408 fps | 96.6% |
| Hodgdon H4831 | <<locked>> | 80% | 45,426 psi | 70% | 2579 fps | 98.1% |
| Hodgdon H4831 SC | <<locked>> | 80% | 44,614 psi | 69% | 2562 fps | 97.9% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 51,459 psi | 79% | 2612 fps | 100% |
| Hodgdon Retumbo | 75.6 gr | 80% | 35,795 psi | 55% | 2510 fps | 98.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,224 psi | 43% | 1585 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 53,214 psi | 82% | 2664 fps | 100% |
| IMR 4831 | <<locked>> | 80% | 53,853 psi | 83% | 2667 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 46,412 psi | 71% | 2569 fps | 98.4% |
| IMR 7828 SSC | <<locked>> | 80% | 41,713 psi | 64% | 2566 fps | 97.9% |
| IMR 7977 Enduron | <<locked>> | 92% | 54,853 psi | 84% | 2671 fps | 95% |
| IMR 8133 Enduron | <<locked>> | 86% | 33,011 psi | 51% | 2395 fps | 95.2% |
| Lovex S071 | <<locked>> | 80% | 37,565 psi | 58% | 2398 fps | 99.5% |
| Norma 204 | <<locked>> | 80% | 54,346 psi | 84% | 2720 fps | 100% |
| Norma 217 | <<locked>> | 82% | 28,935 psi | 45% | 2306 fps | 95.6% |
| Norma MRP | <<locked>> | 80% | 46,427 psi | 71% | 2651 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 41,698 psi | 64% | 2572 fps | 98.3% |
| Ramshot Hunter | <<locked>> | 80% | 54,447 psi | 84% | 2717 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 37,652 psi | 58% | 2457 fps | 98.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,993 psi | 45% | 1624 fps | 100% |
| ReloadSwiss RS 76 | 81 gr | 80% | 35,244 psi | 54% | 2487 fps | 99% |
| ReloadSwiss RS 80 | 85.7 gr | 84% | 37,536 psi | 58% | 2507 fps | 95.6% |
| Rottweil R 904 | <<locked>> | 80% | 48,443 psi | 75% | 2608 fps | 99.1% |
| Rottweil R 905 | <<locked>> | 80% | 47,268 psi | 73% | 2618 fps | 99.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 46,920 psi | 72% | 2615 fps | 99.6% |
| Somchem S361 | <<locked>> | 80% | 49,400 psi | 76% | 2595 fps | 98.8% |
| Somchem S365 | <<locked>> | 80% | 53,214 psi | 82% | 2664 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 47,529 psi | 73% | 2592 fps | 99.9% |
| Vihtavuori N165 | <<locked>> | 80% | 41,582 psi | 64% | 2480 fps | 99.1% |
| Vihtavuori N170 | <<locked>> | 90% | 49,922 psi | 77% | 2641 fps | 95.5% |
| Vihtavuori N555 | <<locked>> | 80% | 47,079 psi | 72% | 2598 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 46,079 psi | 71% | 2648 fps | 98.4% |
| Vihtavuori N565 | <<locked>> | 80% | 38,392 psi | 59% | 2480 fps | 96.6% |
| Vihtavuori N568 | <<locked>> | 84% | 38,754 psi | 60% | 2523 fps | 95.4% |
| Vihtavuori N570 | <<locked>> | 90% | 45,672 psi | 70% | 2694 fps | 95.6% |
| Winchester StaBALL HD | <<locked>> | 80% | 40,814 psi | 63% | 2585 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 43,816 psi | 67% | 2530 fps | 99.1% |
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 63 powders for .300 Rem. Ultra Mag. loaded with the .308 | 200gr | Norma VULKAN. ADI AR 2218 delivers the highest muzzle velocity at 2,897 fps; across all powders the maximum-charge window runs from 1,772 fps to 2,897 fps. Accurate 8700 gives the best case fill at 100 %, and 63 of the 63 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 200.0 gr projectile in 0.308" calls for a 1:14.0 twist; slower twists will usually not stabilise this weight. Accurate 8700, ADI AR 2218, 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. Hodgdon Retumbo, ReloadSwiss RS 76, ReloadSwiss RS 80 rank at the top here: for .300 Rem. Ultra Mag. with the .308 | 200gr | Norma VULKAN they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Hodgdon US 869, Lovex D100, Ramshot LRT 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.