Load Specifications
Load data in caliber .300 Rem. Ultra Mag. with .308 | 210gr | Berger VLD Target bullet and 54 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Hodgdon Retumbo, Vihtavuori N570 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% | 57,667 psi | 89% | 2661 fps | 100% |
| Accurate MAGPRO | <<locked>> | 88% | 57,638 psi | 89% | 2772 fps | 99.5% |
| ADI AR 2209 | <<locked>> | 84% | 55,027 psi | 85% | 2690 fps | 100% |
| ADI AR 2213 | <<locked>> | 88% | 57,392 psi | 88% | 2759 fps | 100% |
| ADI AR 2217 | <<locked>> | 96% | 56,115 psi | 86% | 2736 fps | 100% |
| ADI AR 2218ᴾ | <<locked>> | 100% | 56,811 psi | 87% | 2854 fps | 99.1% |
| ADI AR 2225 | <<locked>> | 98% | 55,114 psi | 85% | 2756 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 58,407 psi | 90% | 2733 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 88% | 57,827 psi | 89% | 2753 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 88% | 56,028 psi | 86% | 2664 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 92% | 56,420 psi | 87% | 2733 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 84% | 56,565 psi | 87% | 2746 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 98% | 58,726 psi | 90% | 2835 fps | 99.1% |
| Alliant Reloder-50ᴾ | <<locked>> | 100% | 53,954 psi | 83% | 2759 fps | 98% |
| Baschieri & Pellagri 109 | <<locked>> | 90% | 57,899 psi | 89% | 2723 fps | 99% |
| Bofors RP15 | <<locked>> | 90% | 57,217 psi | 88% | 2746 fps | 100% |
| Bofors RP30 | <<locked>> | 94% | 56,043 psi | 86% | 2749 fps | 100% |
| Bofors RP5 | <<locked>> | 88% | 57,827 psi | 89% | 2753 fps | 100% |
| Hodgdon H1000 | <<locked>> | 94% | 57,783 psi | 89% | 2756 fps | 100% |
| Hodgdon H4831 | <<locked>> | 86% | 56,463 psi | 87% | 2697 fps | 99.8% |
| Hodgdon H4831 SC | <<locked>> | 86% | 55,448 psi | 85% | 2684 fps | 99.7% |
| Hodgdon Hybrid 100V | <<locked>> | 82% | 55,521 psi | 85% | 2605 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 92% | 55,535 psi | 85% | 2818 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,826 psi | 58% | 1726 fps | 100% |
| IMR 4350 | <<locked>> | 82% | 57,246 psi | 88% | 2664 fps | 100% |
| IMR 4831 | <<locked>> | 82% | 58,044 psi | 89% | 2664 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 86% | 56,768 psi | 87% | 2677 fps | 99.8% |
| IMR 7828 SSC | <<locked>> | 88% | 55,883 psi | 86% | 2746 fps | 100% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 54,244 psi | 83% | 2740 fps | 100% |
| Lovex S071 | <<locked>> | 92% | 55,825 psi | 86% | 2638 fps | 100% |
| Norma 204 | <<locked>> | 82% | 58,740 psi | 90% | 2723 fps | 100% |
| Norma 217ᴾ | <<locked>> | 100% | 55,463 psi | 85% | 2762 fps | 100% |
| Norma MRP | <<locked>> | 86% | 58,001 psi | 89% | 2769 fps | 100% |
| Ramshot Grand | <<locked>> | 88% | 57,072 psi | 88% | 2762 fps | 100% |
| Ramshot Hunter | <<locked>> | 82% | 58,769 psi | 90% | 2717 fps | 100% |
| Ramshot Magnum | <<locked>> | 90% | 55,695 psi | 86% | 2697 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,812 psi | 60% | 1765 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 92% | 56,289 psi | 87% | 2805 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 94% | 55,738 psi | 86% | 2776 fps | 99.7% |
| Rottweil R 904 | <<locked>> | 84% | 55,709 psi | 86% | 2664 fps | 99.9% |
| Rottweil R 905 | <<locked>> | 86% | 58,233 psi | 90% | 2726 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 57,841 psi | 89% | 2720 fps | 100% |
| Somchem S361 | <<locked>> | 84% | 57,058 psi | 88% | 2654 fps | 99.8% |
| Somchem S365 | <<locked>> | 82% | 57,551 psi | 89% | 2657 fps | 100% |
| Somchem S385 | <<locked>> | 86% | 58,639 psi | 90% | 2694 fps | 100% |
| Vihtavuori N165 | <<locked>> | 90% | 58,581 psi | 90% | 2684 fps | 100% |
| Vihtavuori N170 | <<locked>> | 94% | 57,740 psi | 89% | 2710 fps | 97.6% |
| Vihtavuori N555 | <<locked>> | 86% | 57,928 psi | 89% | 2690 fps | 100% |
| Vihtavuori N560 | <<locked>> | 86% | 57,377 psi | 88% | 2772 fps | 99.9% |
| Vihtavuori N565 | <<locked>> | 92% | 58,436 psi | 90% | 2766 fps | 100% |
| Vihtavuori N568 | <<locked>> | 94% | 56,217 psi | 87% | 2776 fps | 99.5% |
| Vihtavuori N570 | <<locked>> | 96% | 57,435 psi | 88% | 2838 fps | 98.7% |
| Winchester StaBALL HD | <<locked>> | 88% | 56,275 psi | 87% | 2749 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 88% | 58,537 psi | 90% | 2694 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% | 44,193 psi | 68% | 2467 fps | 100% |
| Accurate MAGPRO | <<locked>> | 80% | 43,468 psi | 67% | 2543 fps | 97.1% |
| ADI AR 2209 | <<locked>> | 80% | 48,225 psi | 74% | 2589 fps | 99.8% |
| ADI AR 2213 | <<locked>> | 80% | 43,424 psi | 67% | 2539 fps | 98.6% |
| ADI AR 2217 | <<locked>> | 80% | 32,401 psi | 50% | 2300 fps | 95.4% |
| ADI AR 2218 | <<locked>> | 92% | 42,221 psi | 65% | 2589 fps | 95.2% |
| ADI AR 2225 | <<locked>> | 80% | 29,762 psi | 46% | 2277 fps | 97.4% |
| Alliant Reloder-19 | <<locked>> | 80% | 48,080 psi | 74% | 2582 fps | 99.8% |
| Alliant Reloder-22 | <<locked>> | 80% | 44,237 psi | 68% | 2543 fps | 99.4% |
| Alliant Reloder-23 | <<locked>> | 80% | 42,975 psi | 66% | 2484 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 37,246 psi | 57% | 2434 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 80% | 48,834 psi | 75% | 2641 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 90% | 43,366 psi | 67% | 2585 fps | 95.9% |
| Alliant Reloder-50 | <<locked>> | 94% | 43,120 psi | 66% | 2572 fps | 95.2% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 41,930 psi | 65% | 2457 fps | 95.5% |
| Bofors RP15 | <<locked>> | 80% | 41,133 psi | 63% | 2484 fps | 98.9% |
| Bofors RP30 | <<locked>> | 80% | 34,751 psi | 53% | 2372 fps | 96.6% |
| Bofors RP5 | <<locked>> | 80% | 44,237 psi | 68% | 2543 fps | 99.4% |
| Hodgdon H1000 | <<locked>> | 80% | 35,186 psi | 54% | 2369 fps | 97.2% |
| Hodgdon H4831 | <<locked>> | 80% | 46,035 psi | 71% | 2536 fps | 98.5% |
| Hodgdon H4831 SC | <<locked>> | 80% | 45,194 psi | 70% | 2520 fps | 98.4% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 51,982 psi | 80% | 2559 fps | 100% |
| Hodgdon Retumbo | 73.9 gr | 80% | 36,376 psi | 56% | 2477 fps | 98.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,398 psi | 44% | 1545 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 53,780 psi | 83% | 2618 fps | 100% |
| IMR 4831 | <<locked>> | 80% | 54,447 psi | 84% | 2618 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 46,891 psi | 72% | 2523 fps | 98.8% |
| IMR 7828 SSC | <<locked>> | 80% | 42,192 psi | 65% | 2523 fps | 98.4% |
| IMR 8133 Enduron | <<locked>> | 86% | 33,547 psi | 52% | 2362 fps | 96% |
| Lovex S071 | <<locked>> | 80% | 38,087 psi | 59% | 2359 fps | 99.7% |
| Norma 204 | <<locked>> | 80% | 54,882 psi | 84% | 2671 fps | 100% |
| Norma 217 | <<locked>> | 80% | 27,441 psi | 42% | 2221 fps | 95.3% |
| Norma MRP | <<locked>> | 80% | 47,036 psi | 72% | 2608 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 42,293 psi | 65% | 2533 fps | 98.7% |
| Ramshot Hunter | <<locked>> | 80% | 54,998 psi | 85% | 2667 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 38,232 psi | 59% | 2421 fps | 99.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,037 psi | 45% | 1581 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 35,708 psi | 55% | 2454 fps | 99.4% |
| ReloadSwiss RS 80 | 81.7 gr | 82% | 35,201 psi | 54% | 2408 fps | 95.1% |
| Rottweil R 904 | <<locked>> | 80% | 48,791 psi | 75% | 2562 fps | 99.4% |
| Rottweil R 905 | <<locked>> | 80% | 47,674 psi | 73% | 2569 fps | 99.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 47,340 psi | 73% | 2569 fps | 99.8% |
| Somchem S361 | <<locked>> | 80% | 49,966 psi | 77% | 2552 fps | 99.1% |
| Somchem S365 | <<locked>> | 80% | 53,896 psi | 83% | 2612 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 48,153 psi | 74% | 2549 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 42,090 psi | 65% | 2438 fps | 99.4% |
| Vihtavuori N170 | <<locked>> | 88% | 47,224 psi | 73% | 2546 fps | 95.2% |
| Vihtavuori N555 | <<locked>> | 80% | 47,674 psi | 73% | 2552 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 46,644 psi | 72% | 2605 fps | 98.8% |
| Vihtavuori N565 | <<locked>> | 80% | 38,856 psi | 60% | 2441 fps | 97.2% |
| Vihtavuori N568 | <<locked>> | 84% | 39,175 psi | 60% | 2484 fps | 96% |
| Vihtavuori N570 | 84.4 gr | 88% | 43,120 psi | 66% | 2595 fps | 95.3% |
| Winchester StaBALL HD | <<locked>> | 80% | 41,481 psi | 64% | 2539 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 44,440 psi | 68% | 2487 fps | 99.4% |
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 54 powders for .300 Rem. Ultra Mag. loaded with the .308 | 210gr | Berger VLD Target. ADI AR 2218 delivers the highest muzzle velocity at 2,854 fps; across all powders the maximum-charge window runs from 1,726 fps to 2,854 fps. ADI AR 2218 gives the best case fill at 100 %, and 54 of the 54 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 210.0 gr projectile in 0.308" calls for a 1:11.5 twist; slower twists will usually not stabilise this weight. ADI AR 2218, Alliant Reloder-50, Hodgdon TrailBoss 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, Vihtavuori N570, ReloadSwiss RS 80 rank at the top here: for .300 Rem. Ultra Mag. with the .308 | 210gr | Berger VLD Target 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.