Load Specifications
Load data in caliber .300 Rem. Ultra Mag. with .308 | 182gr | CutEdge MTAC MAX bullet and 73 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 Accurate MAGPRO.
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>> | 92% | 57,203 psi | 88% | 2822 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 57,812 psi | 89% | 2851 fps | 100% |
| Accurate MAGPRO | <<locked>> | 90% | 56,434 psi | 87% | 2923 fps | 98.9% |
| ADI AR 2209 | <<locked>> | 88% | 55,274 psi | 85% | 2861 fps | 99.8% |
| ADI AR 2213 | <<locked>> | 92% | 57,305 psi | 88% | 2923 fps | 99.6% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 55,506 psi | 85% | 2890 fps | 99.7% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 49,980 psi | 77% | 2851 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 84% | 55,332 psi | 85% | 2854 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 90% | 58,668 psi | 90% | 2907 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 92% | 57,450 psi | 88% | 2917 fps | 99.9% |
| Alliant Reloder-23 | <<locked>> | 92% | 55,201 psi | 85% | 2831 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 96% | 55,158 psi | 85% | 2894 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 88% | 55,854 psi | 86% | 2913 fps | 100% |
| Alliant Reloder-33ᴾ | <<locked>> | 100% | 52,794 psi | 81% | 2904 fps | 96.9% |
| Baschieri & Pellagri 109 | <<locked>> | 94% | 58,465 psi | 90% | 2884 fps | 98% |
| Bofors RP15 | <<locked>> | 94% | 56,608 psi | 87% | 2904 fps | 99.9% |
| Bofors RP30ᴾ | <<locked>> | 100% | 58,798 psi | 90% | 2956 fps | 99.9% |
| Bofors RP5 | <<locked>> | 92% | 57,450 psi | 88% | 2917 fps | 99.9% |
| Bofors RP7 | <<locked>> | 82% | 55,753 psi | 86% | 2802 fps | 100% |
| Hodgdon H1000 | <<locked>> | 98% | 57,363 psi | 88% | 2917 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 82% | 55,854 psi | 86% | 2854 fps | 100% |
| Hodgdon H4350 | <<locked>> | 82% | 58,044 psi | 89% | 2867 fps | 100% |
| Hodgdon H4831 | <<locked>> | 90% | 56,753 psi | 87% | 2861 fps | 99.1% |
| Hodgdon H4831 SC | <<locked>> | 90% | 55,709 psi | 86% | 2844 fps | 99% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 55,535 psi | 85% | 2779 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 98% | 58,073 psi | 89% | 3028 fps | 100% |
| Hodgdon Superformance | <<locked>> | 82% | 56,637 psi | 87% | 2887 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,217 psi | 57% | 1834 fps | 100% |
| IMR 4350 | <<locked>> | 86% | 57,957 psi | 89% | 2841 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 82% | 57,261 psi | 88% | 2825 fps | 100% |
| IMR 4831 | <<locked>> | 86% | 58,218 psi | 90% | 2841 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 90% | 57,508 psi | 89% | 2848 fps | 99.3% |
| IMR 7828 SSC | <<locked>> | 92% | 55,434 psi | 85% | 2907 fps | 99.4% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 45,252 psi | 70% | 2756 fps | 98.2% |
| Lovex S065 | <<locked>> | 84% | 58,160 psi | 90% | 2822 fps | 100% |
| Lovex S070 | <<locked>> | 84% | 56,405 psi | 87% | 2818 fps | 100% |
| Lovex S071 | <<locked>> | 98% | 58,537 psi | 90% | 2841 fps | 100% |
| Norma 204 | <<locked>> | 84% | 55,477 psi | 85% | 2844 fps | 99.7% |
| Norma 217ᴾ | <<locked>> | 100% | 45,759 psi | 70% | 2782 fps | 99.7% |
| Norma MRP | <<locked>> | 90% | 57,696 psi | 89% | 2936 fps | 100% |
| Norma URP | <<locked>> | 84% | 56,231 psi | 87% | 2835 fps | 100% |
| Ramshot Grand | <<locked>> | 92% | 56,362 psi | 87% | 2923 fps | 99.7% |
| Ramshot Hunter | <<locked>> | 84% | 55,230 psi | 85% | 2841 fps | 100% |
| Ramshot Magnum | <<locked>> | 94% | 54,984 psi | 85% | 2858 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,087 psi | 59% | 1877 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 58,320 psi | 90% | 2874 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 84% | 56,956 psi | 88% | 2904 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 96% | 54,926 psi | 85% | 2959 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 58,682 psi | 90% | 2982 fps | 99.4% |
| Rottweil R 904 | <<locked>> | 88% | 56,115 psi | 86% | 2831 fps | 99.4% |
| Rottweil R 905 | <<locked>> | 90% | 58,305 psi | 90% | 2894 fps | 100% |
| Rottweil R 907 | <<locked>> | 82% | 55,753 psi | 86% | 2802 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 84% | 58,160 psi | 90% | 2822 fps | 100% |
| Shooters World SW4350 | <<locked>> | 84% | 56,405 psi | 87% | 2818 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 57,261 psi | 88% | 2776 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 57,870 psi | 89% | 2894 fps | 99.9% |
| Somchem S361 | <<locked>> | 88% | 57,885 psi | 89% | 2822 fps | 99.2% |
| Somchem S365 | <<locked>> | 86% | 57,246 psi | 88% | 2835 fps | 100% |
| Somchem S385 | <<locked>> | 90% | 58,653 psi | 90% | 2864 fps | 100% |
| Vihtavuori N150 | <<locked>> | 82% | 58,189 psi | 90% | 2759 fps | 100% |
| Vihtavuori N160 | <<locked>> | 84% | 57,885 psi | 89% | 2825 fps | 100% |
| Vihtavuori N165 | <<locked>> | 94% | 58,450 psi | 90% | 2844 fps | 100% |
| Vihtavuori N170 | <<locked>> | 98% | 57,653 psi | 89% | 2854 fps | 96.1% |
| Vihtavuori N550 | <<locked>> | 84% | 57,145 psi | 88% | 2831 fps | 100% |
| Vihtavuori N555 | <<locked>> | 90% | 57,087 psi | 88% | 2861 fps | 100% |
| Vihtavuori N560 | <<locked>> | 90% | 57,305 psi | 88% | 2940 fps | 99.3% |
| Vihtavuori N565 | <<locked>> | 96% | 57,479 psi | 88% | 2917 fps | 99.5% |
| Vihtavuori N568 | <<locked>> | 98% | 55,042 psi | 85% | 2923 fps | 98.5% |
| Vihtavuori N570ᴾ | <<locked>> | 100% | 56,057 psi | 86% | 2979 fps | 97.2% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 57,856 psi | 89% | 2779 fps | 100% |
| Winchester 760 | <<locked>> | 82% | 55,854 psi | 86% | 2854 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 94% | 58,421 psi | 90% | 2966 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 58,798 psi | 90% | 2861 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% | 37,623 psi | 58% | 2500 fps | 98.9% |
| Accurate 4350 | <<locked>> | 80% | 50,343 psi | 77% | 2746 fps | 100% |
| Accurate MAGPRO | 79.4 gr | 82% | 42,003 psi | 65% | 2674 fps | 95.6% |
| ADI AR 2209 | <<locked>> | 80% | 41,989 psi | 65% | 2635 fps | 97.8% |
| ADI AR 2213 | <<locked>> | 80% | 37,449 psi | 58% | 2566 fps | 95.1% |
| ADI AR 2217 | <<locked>> | 88% | 36,448 psi | 56% | 2533 fps | 95.1% |
| ADI AR 2225 | <<locked>> | 86% | 30,777 psi | 47% | 2434 fps | 95.9% |
| Alliant Reloder-16 | <<locked>> | 80% | 48,385 psi | 74% | 2756 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 42,003 psi | 65% | 2628 fps | 97.9% |
| Alliant Reloder-22 | <<locked>> | 80% | 37,811 psi | 58% | 2569 fps | 96.8% |
| Alliant Reloder-23 | <<locked>> | 80% | 36,448 psi | 56% | 2530 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 31,430 psi | 48% | 2448 fps | 97.9% |
| Alliant Reloder-26 | <<locked>> | 80% | 40,901 psi | 63% | 2677 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 98% | 48,965 psi | 75% | 2838 fps | 95.8% |
| Baschieri & Pellagri 109 | <<locked>> | 88% | 48,182 psi | 74% | 2717 fps | 95.6% |
| Bofors RP15 | <<locked>> | 80% | 35,085 psi | 54% | 2507 fps | 95.6% |
| Bofors RP30 | <<locked>> | 86% | 35,853 psi | 55% | 2546 fps | 95.3% |
| Bofors RP5 | <<locked>> | 80% | 37,811 psi | 58% | 2569 fps | 96.8% |
| Bofors RP7 | <<locked>> | 80% | 52,243 psi | 80% | 2749 fps | 99.8% |
| Hodgdon H1000 | <<locked>> | 84% | 34,664 psi | 53% | 2493 fps | 95% |
| Hodgdon H414 | <<locked>> | 80% | 52,083 psi | 80% | 2799 fps | 100% |
| Hodgdon H4350 | <<locked>> | 80% | 54,418 psi | 84% | 2815 fps | 99.8% |
| Hodgdon H4831 | <<locked>> | 80% | 40,045 psi | 62% | 2572 fps | 95.4% |
| Hodgdon H4831 SC | <<locked>> | 80% | 39,276 psi | 60% | 2556 fps | 95.1% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 45,382 psi | 70% | 2635 fps | 100% |
| Hodgdon Retumbo | 75.1 gr | 82% | 32,866 psi | 51% | 2526 fps | 95.4% |
| Hodgdon Superformance | <<locked>> | 80% | 52,547 psi | 81% | 2828 fps | 100% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,905 psi | 43% | 1644 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 47,776 psi | 74% | 2687 fps | 99.5% |
| IMR 4451 Enduron | <<locked>> | 80% | 53,751 psi | 83% | 2772 fps | 100% |
| IMR 4831 | <<locked>> | 80% | 47,674 psi | 73% | 2690 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 41,481 psi | 64% | 2572 fps | 96.1% |
| IMR 7828 SSC | <<locked>> | 82% | 38,667 psi | 60% | 2598 fps | 95.7% |
| IMR 8133 Enduron | <<locked>> | 94% | 36,622 psi | 56% | 2579 fps | 95.4% |
| Lovex S065 | <<locked>> | 80% | 51,169 psi | 79% | 2720 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 49,574 psi | 76% | 2717 fps | 99.9% |
| Lovex S071 | <<locked>> | 80% | 32,126 psi | 49% | 2379 fps | 97.3% |
| Norma 204 | <<locked>> | 80% | 48,341 psi | 74% | 2730 fps | 99% |
| Norma 217 | <<locked>> | 90% | 31,937 psi | 49% | 2484 fps | 95.8% |
| Norma MRP | <<locked>> | 80% | 39,987 psi | 62% | 2638 fps | 98.6% |
| Norma URP | <<locked>> | 80% | 49,197 psi | 76% | 2733 fps | 100% |
| Ramshot Grand | <<locked>> | 82% | 38,493 psi | 59% | 2605 fps | 96.1% |
| Ramshot Hunter | <<locked>> | 80% | 48,254 psi | 74% | 2736 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 31,778 psi | 49% | 2425 fps | 95.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,427 psi | 44% | 1680 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 50,676 psi | 78% | 2769 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 49,037 psi | 75% | 2789 fps | 100% |
| ReloadSwiss RS 76 | 78.4 gr | 80% | 29,718 psi | 46% | 2428 fps | 95% |
| ReloadSwiss RS 80 | <<locked>> | 90% | 39,494 psi | 61% | 2651 fps | 95% |
| Rottweil R 904 | <<locked>> | 80% | 43,178 psi | 66% | 2615 fps | 97.1% |
| Rottweil R 905 | <<locked>> | 80% | 41,278 psi | 64% | 2612 fps | 97.9% |
| Rottweil R 907 | <<locked>> | 80% | 52,243 psi | 80% | 2749 fps | 99.8% |
| Shooters World Long Rifle | <<locked>> | 80% | 51,169 psi | 79% | 2720 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 49,574 psi | 76% | 2717 fps | 99.9% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 50,024 psi | 77% | 2671 fps | 99.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 40,944 psi | 63% | 2608 fps | 97.7% |
| Somchem S361 | <<locked>> | 80% | 43,918 psi | 68% | 2595 fps | 96.7% |
| Somchem S365 | <<locked>> | 80% | 46,528 psi | 72% | 2687 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 41,814 psi | 64% | 2595 fps | 98.6% |
| Vihtavuori N150 | <<locked>> | 80% | 54,520 psi | 84% | 2713 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 50,691 psi | 78% | 2726 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 36,289 psi | 56% | 2470 fps | 96.9% |
| Vihtavuori N170 | <<locked>> | 96% | 53,780 psi | 83% | 2799 fps | 95.2% |
| Vihtavuori N550 | <<locked>> | 80% | 50,024 psi | 77% | 2730 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 40,712 psi | 63% | 2602 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 39,972 psi | 62% | 2631 fps | 95.6% |
| Vihtavuori N565 | <<locked>> | 84% | 37,623 psi | 58% | 2562 fps | 95% |
| Vihtavuori N568 | <<locked>> | 92% | 43,874 psi | 68% | 2730 fps | 95.9% |
| Vihtavuori N570 | <<locked>> | 96% | 48,225 psi | 74% | 2844 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 50,067 psi | 77% | 2677 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 52,286 psi | 80% | 2802 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 80% | 33,373 psi | 51% | 2559 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 38,421 psi | 59% | 2523 fps | 97% |
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 78 powders for .300 Rem. Ultra Mag. loaded with the .308 | 182gr | CutEdge MTAC MAX. Hodgdon Retumbo delivers the highest muzzle velocity at 3,028 fps; across all powders the maximum-charge window runs from 1,834 fps to 3,028 fps. ADI AR 2217 gives the best case fill at 100 %, and 78 of the 78 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (448 MPa), the top charges use 57–90 %, leaving at least 10 % headroom. The 182.0 gr projectile in 0.308" calls for a 1:10.5 twist; slower twists will usually not stabilise this weight. ADI AR 2217, 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, Accurate MAGPRO rank at the top here: for .300 Rem. Ultra Mag. with the .308 | 182gr | CutEdge MTAC MAX they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Alliant Reloder-50, IMR 7977 Enduron, Lovex D100 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.