Load Specifications
Load data in caliber .300 Rem. Ultra Mag. with .308 | 210gr | CutEdge DGSC bullet and 58 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 Vihtavuori N570.
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 3100 | <<locked>> | 88% | 56,652 psi | 87% | 2651 fps | 100% |
| Accurate MAGPRO | <<locked>> | 86% | 55,956 psi | 86% | 2756 fps | 99.6% |
| ADI AR 2209 | <<locked>> | 86% | 58,189 psi | 90% | 2736 fps | 100% |
| ADI AR 2213 | <<locked>> | 88% | 56,768 psi | 87% | 2753 fps | 100% |
| ADI AR 2217 | <<locked>> | 96% | 55,405 psi | 85% | 2730 fps | 100% |
| ADI AR 2218ᴾ | <<locked>> | 100% | 55,869 psi | 86% | 2841 fps | 99% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 58,334 psi | 90% | 2799 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 82% | 58,436 psi | 90% | 2720 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 57,624 psi | 89% | 2726 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 88% | 57,087 psi | 88% | 2746 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 90% | 58,798 psi | 90% | 2700 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 92% | 55,434 psi | 85% | 2723 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 84% | 55,651 psi | 86% | 2736 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 98% | 57,595 psi | 89% | 2818 fps | 99% |
| Alliant Reloder-50ᴾ | <<locked>> | 100% | 52,765 psi | 81% | 2743 fps | 97.8% |
| Baschieri & Pellagri 109 | <<locked>> | 90% | 57,377 psi | 88% | 2720 fps | 99% |
| Bofors RP15 | <<locked>> | 90% | 56,275 psi | 87% | 2736 fps | 100% |
| Bofors RP30 | <<locked>> | 94% | 55,100 psi | 85% | 2740 fps | 100% |
| Bofors RP5 | <<locked>> | 88% | 57,087 psi | 88% | 2746 fps | 100% |
| Hodgdon H1000 | <<locked>> | 94% | 57,043 psi | 88% | 2749 fps | 100% |
| Hodgdon H4831 | <<locked>> | 86% | 55,622 psi | 86% | 2690 fps | 99.7% |
| Hodgdon H4831 SC | <<locked>> | 88% | 58,552 psi | 90% | 2730 fps | 99.9% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 58,421 psi | 90% | 2644 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 94% | 58,711 psi | 90% | 2861 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,695 psi | 58% | 1729 fps | 100% |
| IMR 4350 | <<locked>> | 82% | 56,550 psi | 87% | 2661 fps | 100% |
| IMR 4831 | <<locked>> | 82% | 57,305 psi | 88% | 2661 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 86% | 56,072 psi | 86% | 2671 fps | 99.8% |
| IMR 7828 SSC | <<locked>> | 88% | 54,998 psi | 85% | 2736 fps | 99.9% |
| IMR 7977 Enduron | <<locked>> | 94% | 58,363 psi | 90% | 2671 fps | 96.2% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 53,229 psi | 82% | 2730 fps | 99.9% |
| Lovex S070 | <<locked>> | 82% | 58,639 psi | 90% | 2684 fps | 100% |
| Lovex S071 | <<locked>> | 94% | 58,320 psi | 90% | 2671 fps | 100% |
| Norma 204 | <<locked>> | 82% | 57,957 psi | 89% | 2717 fps | 100% |
| Norma 217ᴾ | <<locked>> | 100% | 54,360 psi | 84% | 2746 fps | 100% |
| Norma MRP | <<locked>> | 86% | 57,188 psi | 88% | 2759 fps | 100% |
| Ramshot Grand | <<locked>> | 88% | 56,289 psi | 87% | 2756 fps | 100% |
| Ramshot Hunter | <<locked>> | 82% | 57,928 psi | 89% | 2707 fps | 100% |
| Ramshot Magnum | <<locked>> | 90% | 54,766 psi | 84% | 2690 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,638 psi | 59% | 1768 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 92% | 55,535 psi | 85% | 2795 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 94% | 54,621 psi | 84% | 2762 fps | 99.7% |
| Rottweil R 904 | <<locked>> | 86% | 58,595 psi | 90% | 2707 fps | 100% |
| Rottweil R 905 | <<locked>> | 86% | 57,334 psi | 88% | 2717 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 58,639 psi | 90% | 2684 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 56,942 psi | 88% | 2713 fps | 100% |
| Somchem S361 | <<locked>> | 84% | 56,376 psi | 87% | 2651 fps | 99.8% |
| Somchem S365 | <<locked>> | 82% | 56,608 psi | 87% | 2651 fps | 100% |
| Somchem S385 | <<locked>> | 86% | 57,638 psi | 89% | 2687 fps | 100% |
| Vihtavuori N165 | <<locked>> | 90% | 57,638 psi | 89% | 2674 fps | 100% |
| Vihtavuori N170 | <<locked>> | 94% | 56,797 psi | 87% | 2697 fps | 97.5% |
| Vihtavuori N555 | <<locked>> | 86% | 56,811 psi | 87% | 2680 fps | 100% |
| Vihtavuori N560 | <<locked>> | 86% | 56,623 psi | 87% | 2766 fps | 99.9% |
| Vihtavuori N565 | <<locked>> | 92% | 57,464 psi | 88% | 2756 fps | 100% |
| Vihtavuori N568 | <<locked>> | 94% | 55,259 psi | 85% | 2766 fps | 99.5% |
| Vihtavuori N570 | <<locked>> | 96% | 56,681 psi | 87% | 2828 fps | 98.6% |
| Winchester StaBALL HD | <<locked>> | 88% | 55,274 psi | 85% | 2740 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 88% | 57,812 psi | 89% | 2690 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% | 42,989 psi | 66% | 2454 fps | 100% |
| Accurate MAGPRO | <<locked>> | 80% | 45,034 psi | 69% | 2579 fps | 98% |
| ADI AR 2209 | <<locked>> | 80% | 47,471 psi | 73% | 2579 fps | 99.7% |
| ADI AR 2213 | <<locked>> | 80% | 42,641 psi | 66% | 2526 fps | 98.4% |
| ADI AR 2217 | <<locked>> | 82% | 33,823 psi | 52% | 2339 fps | 96% |
| ADI AR 2218 | <<locked>> | 94% | 44,585 psi | 69% | 2641 fps | 96.2% |
| ADI AR 2225 | <<locked>> | 80% | 28,819 psi | 44% | 2254 fps | 96.9% |
| Alliant Reloder-16 | <<locked>> | 80% | 54,708 psi | 84% | 2674 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 47,326 psi | 73% | 2572 fps | 99.7% |
| Alliant Reloder-22 | <<locked>> | 80% | 43,323 psi | 67% | 2530 fps | 99.3% |
| Alliant Reloder-23 | <<locked>> | 80% | 42,076 psi | 65% | 2470 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 36,318 psi | 56% | 2418 fps | 99.9% |
| Alliant Reloder-26 | <<locked>> | 80% | 47,718 psi | 73% | 2625 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 90% | 42,337 psi | 65% | 2566 fps | 95.5% |
| Alliant Reloder-50 | <<locked>> | 96% | 45,165 psi | 70% | 2612 fps | 95.9% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 41,249 psi | 63% | 2448 fps | 95.3% |
| Bofors RP15 | <<locked>> | 80% | 40,248 psi | 62% | 2470 fps | 98.7% |
| Bofors RP30 | <<locked>> | 80% | 33,736 psi | 52% | 2352 fps | 96.2% |
| Bofors RP5 | <<locked>> | 80% | 43,323 psi | 67% | 2530 fps | 99.3% |
| Hodgdon H1000 | <<locked>> | 80% | 34,330 psi | 53% | 2352 fps | 96.9% |
| Hodgdon H4831 | <<locked>> | 80% | 45,266 psi | 70% | 2526 fps | 98.4% |
| Hodgdon H4831 SC | <<locked>> | 80% | 44,425 psi | 68% | 2510 fps | 98.2% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 51,213 psi | 79% | 2552 fps | 100% |
| Hodgdon Retumbo | 74.4 gr | 80% | 35,462 psi | 55% | 2457 fps | 98.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,166 psi | 43% | 1545 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 53,084 psi | 82% | 2612 fps | 100% |
| IMR 4831 | <<locked>> | 80% | 53,548 psi | 82% | 2612 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 46,224 psi | 71% | 2516 fps | 98.7% |
| IMR 7828 SSC | <<locked>> | 80% | 41,365 psi | 64% | 2510 fps | 98.2% |
| IMR 7977 Enduron | <<locked>> | 92% | 54,708 psi | 84% | 2618 fps | 95.4% |
| IMR 8133 Enduron | <<locked>> | 86% | 32,489 psi | 50% | 2339 fps | 95.4% |
| Lovex S070 | <<locked>> | 80% | 55,071 psi | 85% | 2635 fps | 100% |
| Lovex S071 | <<locked>> | 80% | 36,941 psi | 57% | 2339 fps | 99.6% |
| Norma 204 | <<locked>> | 80% | 54,143 psi | 83% | 2664 fps | 100% |
| Norma 217 | <<locked>> | 82% | 28,355 psi | 44% | 2247 fps | 95.8% |
| Norma MRP | <<locked>> | 80% | 46,079 psi | 71% | 2595 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 41,553 psi | 64% | 2523 fps | 98.6% |
| Ramshot Hunter | <<locked>> | 80% | 54,157 psi | 83% | 2661 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 37,202 psi | 57% | 2405 fps | 98.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,921 psi | 45% | 1581 fps | 100% |
| ReloadSwiss RS 76 | 79.6 gr | 80% | 34,664 psi | 53% | 2431 fps | 99.1% |
| ReloadSwiss RS 80 | <<locked>> | 84% | 36,985 psi | 57% | 2448 fps | 95.8% |
| Rottweil R 904 | <<locked>> | 80% | 48,283 psi | 74% | 2556 fps | 99.3% |
| Rottweil R 905 | <<locked>> | 80% | 46,818 psi | 72% | 2562 fps | 99.7% |
| Shooters World SW4350 | <<locked>> | 80% | 55,071 psi | 85% | 2635 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 46,485 psi | 72% | 2556 fps | 99.7% |
| Somchem S361 | <<locked>> | 80% | 49,139 psi | 76% | 2543 fps | 99% |
| Somchem S365 | <<locked>> | 80% | 52,968 psi | 82% | 2605 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 47,210 psi | 73% | 2536 fps | 99.9% |
| Vihtavuori N165 | <<locked>> | 80% | 41,263 psi | 64% | 2428 fps | 99.3% |
| Vihtavuori N170 | <<locked>> | 88% | 46,151 psi | 71% | 2530 fps | 95% |
| Vihtavuori N555 | <<locked>> | 80% | 46,441 psi | 71% | 2536 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 45,774 psi | 70% | 2592 fps | 98.7% |
| Vihtavuori N565 | <<locked>> | 80% | 37,768 psi | 58% | 2421 fps | 96.8% |
| Vihtavuori N568 | <<locked>> | 84% | 38,261 psi | 59% | 2467 fps | 95.7% |
| Vihtavuori N570 | 86.9 gr | 90% | 45,397 psi | 70% | 2641 fps | 96% |
| Winchester StaBALL HD | <<locked>> | 80% | 40,350 psi | 62% | 2523 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 43,584 psi | 67% | 2477 fps | 99.3% |
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 65 powders for .300 Rem. Ultra Mag. loaded with the .308 | 210gr | CutEdge DGSC. Hodgdon Retumbo delivers the highest muzzle velocity at 2,861 fps; across all powders the maximum-charge window runs from 1,729 fps to 2,861 fps. Accurate 8700 gives the best case fill at 100 %, and 65 of the 65 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 1:13.0 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, Vihtavuori N570 rank at the top here: for .300 Rem. Ultra Mag. with the .308 | 210gr | CutEdge DGSC 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.