Load Specifications
Load data in caliber .300 Rem. Ultra Mag. with .308 | 175gr | Berger VLD Target bullet and 71 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Hodgdon Retumbo, Winchester StaBALL HD and ReloadSwiss RS 76.
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>> | 92% | 58,436 psi | 90% | 2881 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 55,042 psi | 85% | 2858 fps | 100% |
| Accurate MAGPRO | <<locked>> | 90% | 57,479 psi | 88% | 2982 fps | 98.8% |
| ADI AR 2209 | <<locked>> | 88% | 56,173 psi | 86% | 2917 fps | 99.8% |
| ADI AR 2213 | <<locked>> | 92% | 58,247 psi | 90% | 2982 fps | 99.5% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 56,550 psi | 87% | 2946 fps | 99.6% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 51,024 psi | 79% | 2907 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 84% | 56,188 psi | 86% | 2913 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 55,695 psi | 86% | 2904 fps | 99.7% |
| Alliant Reloder-22 | <<locked>> | 92% | 58,537 psi | 90% | 2976 fps | 99.9% |
| Alliant Reloder-23 | <<locked>> | 92% | 56,246 psi | 87% | 2890 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 96% | 56,188 psi | 86% | 2953 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 88% | 57,058 psi | 88% | 2976 fps | 100% |
| Alliant Reloder-33ᴾ | <<locked>> | 100% | 54,172 psi | 83% | 2959 fps | 96.9% |
| Baschieri & Pellagri 109 | <<locked>> | 92% | 55,535 psi | 85% | 2877 fps | 97.2% |
| Bofors RP15 | <<locked>> | 94% | 57,682 psi | 89% | 2963 fps | 99.9% |
| Bofors RP30 | <<locked>> | 98% | 55,898 psi | 86% | 2956 fps | 99.6% |
| Bofors RP5 | <<locked>> | 92% | 58,537 psi | 90% | 2976 fps | 99.9% |
| Bofors RP7 | <<locked>> | 82% | 56,550 psi | 87% | 2854 fps | 100% |
| Hodgdon H1000 | <<locked>> | 98% | 58,146 psi | 89% | 2969 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 82% | 56,521 psi | 87% | 2907 fps | 100% |
| Hodgdon H4831 | <<locked>> | 90% | 57,566 psi | 89% | 2917 fps | 99% |
| Hodgdon H4831 SC | <<locked>> | 90% | 56,536 psi | 87% | 2900 fps | 98.9% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 56,507 psi | 87% | 2835 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 96% | 55,056 psi | 85% | 3028 fps | 100% |
| Hodgdon Superformance | <<locked>> | 82% | 57,508 psi | 89% | 2943 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,275 psi | 57% | 1873 fps | 100% |
| IMR 4350 | <<locked>> | 86% | 58,711 psi | 90% | 2894 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 82% | 57,914 psi | 89% | 2877 fps | 100% |
| IMR 4831 | <<locked>> | 84% | 55,535 psi | 85% | 2851 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 90% | 58,102 psi | 89% | 2897 fps | 99.2% |
| IMR 7828 SSC | <<locked>> | 92% | 56,231 psi | 87% | 2959 fps | 99.4% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 46,528 psi | 72% | 2815 fps | 98.2% |
| Lovex S065 | <<locked>> | 82% | 55,405 psi | 85% | 2828 fps | 100% |
| Lovex S070 | <<locked>> | 84% | 57,406 psi | 88% | 2877 fps | 100% |
| Lovex S071 | <<locked>> | 96% | 56,115 psi | 86% | 2848 fps | 100% |
| Norma 204 | <<locked>> | 84% | 56,405 psi | 87% | 2900 fps | 99.7% |
| Norma 217ᴾ | <<locked>> | 100% | 47,094 psi | 72% | 2841 fps | 99.7% |
| Norma MRP | <<locked>> | 90% | 58,610 psi | 90% | 2995 fps | 100% |
| Norma URP | <<locked>> | 84% | 57,203 psi | 88% | 2894 fps | 100% |
| Ramshot Grand | <<locked>> | 92% | 57,377 psi | 88% | 2979 fps | 99.7% |
| Ramshot Hunter | <<locked>> | 84% | 56,217 psi | 87% | 2897 fps | 100% |
| Ramshot Magnum | <<locked>> | 94% | 56,159 psi | 86% | 2910 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,159 psi | 59% | 1916 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 55,376 psi | 85% | 2877 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 84% | 57,899 psi | 89% | 2959 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 96% | 56,188 psi | 86% | 3018 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 98% | 55,637 psi | 86% | 2976 fps | 98.9% |
| Rottweil R 904 | <<locked>> | 88% | 57,000 psi | 88% | 2887 fps | 99.3% |
| Rottweil R 905 | <<locked>> | 88% | 55,361 psi | 85% | 2897 fps | 99.8% |
| Rottweil R 907 | <<locked>> | 82% | 56,550 psi | 87% | 2854 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 82% | 55,405 psi | 85% | 2828 fps | 100% |
| Shooters World SW4350 | <<locked>> | 84% | 57,406 psi | 88% | 2877 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 58,189 psi | 90% | 2831 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 58,668 psi | 90% | 2946 fps | 99.9% |
| Somchem S361 | <<locked>> | 88% | 58,798 psi | 90% | 2874 fps | 99.2% |
| Somchem S365 | <<locked>> | 86% | 58,233 psi | 90% | 2890 fps | 100% |
| Somchem S385 | <<locked>> | 88% | 55,811 psi | 86% | 2864 fps | 100% |
| Vihtavuori N160 | <<locked>> | 84% | 58,755 psi | 90% | 2881 fps | 100% |
| Vihtavuori N165 | <<locked>> | 92% | 55,564 psi | 86% | 2848 fps | 99.9% |
| Vihtavuori N170 | <<locked>> | 98% | 58,740 psi | 90% | 2910 fps | 96% |
| Vihtavuori N550 | <<locked>> | 84% | 58,073 psi | 89% | 2887 fps | 100% |
| Vihtavuori N555 | <<locked>> | 90% | 58,131 psi | 89% | 2917 fps | 100% |
| Vihtavuori N560 | <<locked>> | 90% | 58,117 psi | 89% | 2992 fps | 99.3% |
| Vihtavuori N565 | <<locked>> | 96% | 58,798 psi | 90% | 2976 fps | 99.5% |
| Vihtavuori N568 | <<locked>> | 98% | 56,144 psi | 86% | 2979 fps | 98.5% |
| Vihtavuori N570ᴾ | <<locked>> | 100% | 57,043 psi | 88% | 3031 fps | 97.1% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 58,668 psi | 90% | 2831 fps | 100% |
| Winchester 760 | <<locked>> | 82% | 56,724 psi | 87% | 2913 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 92% | 55,303 psi | 85% | 2966 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 90% | 55,782 psi | 86% | 2861 fps | 99.7% |
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% | 38,841 psi | 60% | 2562 fps | 98.9% |
| Accurate 4350 | <<locked>> | 80% | 51,503 psi | 79% | 2805 fps | 100% |
| Accurate MAGPRO | <<locked>> | 82% | 43,105 psi | 66% | 2730 fps | 95.6% |
| ADI AR 2209 | <<locked>> | 80% | 42,801 psi | 66% | 2690 fps | 97.8% |
| ADI AR 2213 | <<locked>> | 80% | 38,261 psi | 59% | 2618 fps | 95.1% |
| ADI AR 2217 | <<locked>> | 88% | 37,289 psi | 57% | 2585 fps | 95.1% |
| ADI AR 2225 | <<locked>> | 86% | 31,705 psi | 49% | 2490 fps | 96% |
| Alliant Reloder-16 | <<locked>> | 80% | 49,008 psi | 75% | 2808 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 42,801 psi | 66% | 2680 fps | 97.8% |
| Alliant Reloder-22 | <<locked>> | 80% | 38,740 psi | 60% | 2628 fps | 96.8% |
| Alliant Reloder-23 | <<locked>> | 80% | 37,434 psi | 58% | 2585 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 32,372 psi | 50% | 2503 fps | 97.9% |
| Alliant Reloder-26 | <<locked>> | 80% | 41,974 psi | 65% | 2736 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 98% | 50,140 psi | 77% | 2894 fps | 95.8% |
| Baschieri & Pellagri 109 | <<locked>> | 88% | 48,965 psi | 75% | 2766 fps | 95.5% |
| Bofors RP15 | <<locked>> | 80% | 36,027 psi | 55% | 2562 fps | 95.6% |
| Bofors RP30 | <<locked>> | 86% | 36,912 psi | 57% | 2605 fps | 95.3% |
| Bofors RP5 | <<locked>> | 80% | 38,740 psi | 60% | 2628 fps | 96.8% |
| Bofors RP7 | <<locked>> | 80% | 53,098 psi | 82% | 2805 fps | 99.8% |
| Hodgdon H1000 | <<locked>> | 84% | 35,534 psi | 55% | 2546 fps | 95% |
| Hodgdon H414 | <<locked>> | 80% | 52,881 psi | 81% | 2854 fps | 100% |
| Hodgdon H4831 | <<locked>> | 80% | 40,828 psi | 63% | 2625 fps | 95.3% |
| Hodgdon H4831 SC | <<locked>> | 80% | 40,059 psi | 62% | 2608 fps | 95.1% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 46,340 psi | 71% | 2690 fps | 100% |
| Hodgdon Retumbo | 76.7 gr | 82% | 33,852 psi | 52% | 2585 fps | 95.5% |
| Hodgdon Superformance | <<locked>> | 80% | 53,519 psi | 82% | 2884 fps | 99.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,021 psi | 43% | 1683 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 48,530 psi | 75% | 2740 fps | 99.5% |
| IMR 4451 Enduron | <<locked>> | 80% | 54,447 psi | 84% | 2828 fps | 100% |
| IMR 4831 | <<locked>> | 80% | 48,646 psi | 75% | 2749 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 42,221 psi | 65% | 2625 fps | 96% |
| IMR 7828 SSC | <<locked>> | 82% | 39,610 psi | 61% | 2657 fps | 95.7% |
| IMR 8133 Enduron | <<locked>> | 94% | 37,710 psi | 58% | 2638 fps | 95.5% |
| Lovex S065 | <<locked>> | 80% | 52,083 psi | 80% | 2779 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 50,531 psi | 78% | 2772 fps | 99.9% |
| Lovex S071 | <<locked>> | 80% | 33,301 psi | 51% | 2438 fps | 97.4% |
| Norma 204 | <<locked>> | 80% | 49,037 psi | 75% | 2782 fps | 98.9% |
| Norma 217 | <<locked>> | 90% | 32,982 psi | 51% | 2543 fps | 96% |
| Norma MRP | <<locked>> | 80% | 40,901 psi | 63% | 2697 fps | 98.6% |
| Norma URP | <<locked>> | 80% | 50,082 psi | 77% | 2789 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 36,651 psi | 56% | 2598 fps | 95% |
| Ramshot Hunter | <<locked>> | 80% | 49,023 psi | 75% | 2789 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 32,822 psi | 51% | 2480 fps | 95.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,703 psi | 44% | 1722 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 51,561 psi | 79% | 2822 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 49,908 psi | 77% | 2844 fps | 100% |
| ReloadSwiss RS 76 | 80 gr | 80% | 30,734 psi | 47% | 2490 fps | 95.2% |
| ReloadSwiss RS 80 | <<locked>> | 90% | 40,625 psi | 63% | 2710 fps | 95.1% |
| Rottweil R 904 | <<locked>> | 80% | 43,801 psi | 67% | 2664 fps | 97% |
| Rottweil R 905 | <<locked>> | 80% | 42,206 psi | 65% | 2667 fps | 97.8% |
| Rottweil R 907 | <<locked>> | 80% | 53,098 psi | 82% | 2805 fps | 99.8% |
| Shooters World Long Rifle | <<locked>> | 80% | 52,083 psi | 80% | 2779 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 50,531 psi | 78% | 2772 fps | 99.9% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 50,923 psi | 78% | 2726 fps | 99.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 41,858 psi | 64% | 2664 fps | 97.7% |
| Somchem S361 | <<locked>> | 80% | 44,773 psi | 69% | 2651 fps | 96.6% |
| Somchem S365 | <<locked>> | 80% | 47,529 psi | 73% | 2743 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 42,786 psi | 66% | 2651 fps | 98.6% |
| Vihtavuori N160 | <<locked>> | 80% | 51,517 psi | 79% | 2779 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 37,188 psi | 57% | 2523 fps | 96.9% |
| Vihtavuori N170 | <<locked>> | 96% | 54,708 psi | 84% | 2848 fps | 95.1% |
| Vihtavuori N550 | <<locked>> | 80% | 50,894 psi | 78% | 2782 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 41,756 psi | 64% | 2661 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 40,770 psi | 63% | 2684 fps | 95.5% |
| Vihtavuori N565 | <<locked>> | 84% | 38,725 psi | 60% | 2621 fps | 95.1% |
| Vihtavuori N568 | <<locked>> | 92% | 44,962 psi | 69% | 2785 fps | 95.9% |
| Vihtavuori N570 | <<locked>> | 96% | 49,211 psi | 76% | 2900 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 50,865 psi | 78% | 2730 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 53,055 psi | 82% | 2854 fps | 100% |
| Winchester StaBALL HD | 76.8 gr | 80% | 34,374 psi | 53% | 2621 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 39,291 psi | 60% | 2575 fps | 96.9% |
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 76 powders for .300 Rem. Ultra Mag. loaded with the .308 | 175gr | Berger VLD Target. Vihtavuori N570 delivers the highest muzzle velocity at 3,031 fps; across all powders the maximum-charge window runs from 1,873 fps to 3,031 fps. ADI AR 2217 gives the best case fill at 100 %, and 76 of the 76 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 175.0 gr projectile in 0.308" calls for a 1:12.0 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, Winchester StaBALL HD, ReloadSwiss RS 76 rank at the top here: for .300 Rem. Ultra Mag. with the .308 | 175gr | Berger VLD Target 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.