Load Specifications
Load data in caliber .300 Rem. Ultra Mag. with .308 | 190gr | Berger VLD Target bullet and 66 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.
A valid access license is required to use the Personalized Load Calculator.
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>> | 90% | 57,783 psi | 89% | 2776 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 58,160 psi | 90% | 2799 fps | 100% |
| Accurate MAGPRO | <<locked>> | 88% | 56,724 psi | 87% | 2877 fps | 99.2% |
| ADI AR 2209 | <<locked>> | 86% | 55,376 psi | 85% | 2812 fps | 99.9% |
| ADI AR 2213 | <<locked>> | 90% | 57,450 psi | 88% | 2877 fps | 99.8% |
| ADI AR 2217 | <<locked>> | 98% | 56,086 psi | 86% | 2851 fps | 99.9% |
| ADI AR 2218ᴾ | <<locked>> | 100% | 52,489 psi | 81% | 2881 fps | 97.3% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 54,520 psi | 84% | 2867 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 82% | 55,390 psi | 85% | 2802 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 58,711 psi | 90% | 2854 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 90% | 57,827 psi | 89% | 2871 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 90% | 55,767 psi | 86% | 2785 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 94% | 55,999 psi | 86% | 2851 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 86% | 56,492 psi | 87% | 2867 fps | 100% |
| Alliant Reloder-33ᴾ | <<locked>> | 100% | 58,073 psi | 89% | 2933 fps | 98.3% |
| Baschieri & Pellagri 109 | <<locked>> | 92% | 58,204 psi | 90% | 2835 fps | 98.3% |
| Bofors RP15 | <<locked>> | 92% | 57,203 psi | 88% | 2861 fps | 100% |
| Bofors RP30 | <<locked>> | 96% | 55,767 psi | 86% | 2861 fps | 99.9% |
| Bofors RP5 | <<locked>> | 90% | 57,827 psi | 89% | 2871 fps | 100% |
| Hodgdon H1000 | <<locked>> | 96% | 57,725 psi | 89% | 2871 fps | 100% |
| Hodgdon H4831 | <<locked>> | 88% | 56,739 psi | 87% | 2815 fps | 99.4% |
| Hodgdon H4831 SC | <<locked>> | 88% | 55,709 psi | 86% | 2799 fps | 99.3% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 55,593 psi | 86% | 2726 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 94% | 54,810 psi | 84% | 2927 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,536 psi | 58% | 1804 fps | 100% |
| IMR 4350 | <<locked>> | 84% | 57,870 psi | 89% | 2789 fps | 100% |
| IMR 4831 | <<locked>> | 84% | 58,479 psi | 90% | 2789 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 88% | 57,116 psi | 88% | 2792 fps | 99.5% |
| IMR 7828 SSC | <<locked>> | 90% | 55,738 psi | 86% | 2858 fps | 99.7% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 49,922 psi | 77% | 2785 fps | 99.3% |
| Lovex S065 | <<locked>> | 82% | 57,972 psi | 89% | 2766 fps | 100% |
| Lovex S070 | <<locked>> | 82% | 56,376 psi | 87% | 2766 fps | 100% |
| Lovex S071 | <<locked>> | 94% | 55,695 psi | 86% | 2749 fps | 100% |
| Norma 204 | <<locked>> | 82% | 55,361 psi | 85% | 2792 fps | 99.9% |
| Norma 217ᴾ | <<locked>> | 100% | 50,807 psi | 78% | 2808 fps | 100% |
| Norma MRP | <<locked>> | 88% | 58,015 psi | 89% | 2887 fps | 100% |
| Norma URP | <<locked>> | 82% | 56,260 psi | 87% | 2782 fps | 100% |
| Ramshot Grand | <<locked>> | 90% | 56,898 psi | 88% | 2877 fps | 99.9% |
| Ramshot Hunter | <<locked>> | 82% | 55,288 psi | 85% | 2789 fps | 100% |
| Ramshot Magnum | <<locked>> | 92% | 55,463 psi | 85% | 2812 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,450 psi | 59% | 1847 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 58,566 psi | 90% | 2822 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 82% | 57,116 psi | 88% | 2848 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 55,883 psi | 86% | 2920 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 96% | 55,187 psi | 85% | 2881 fps | 99.3% |
| Rottweil R 904 | <<locked>> | 86% | 56,028 psi | 86% | 2782 fps | 99.6% |
| Rottweil R 905 | <<locked>> | 88% | 58,508 psi | 90% | 2848 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 82% | 57,972 psi | 89% | 2766 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 56,376 psi | 87% | 2766 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 56,956 psi | 88% | 2723 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 58,102 psi | 89% | 2841 fps | 100% |
| Somchem S361 | <<locked>> | 86% | 57,580 psi | 89% | 2772 fps | 99.5% |
| Somchem S365 | <<locked>> | 84% | 57,769 psi | 89% | 2785 fps | 100% |
| Somchem S385 | <<locked>> | 86% | 55,100 psi | 85% | 2762 fps | 100% |
| Vihtavuori N160 | <<locked>> | 82% | 57,783 psi | 89% | 2769 fps | 100% |
| Vihtavuori N165 | <<locked>> | 92% | 58,740 psi | 90% | 2799 fps | 100% |
| Vihtavuori N170 | <<locked>> | 96% | 58,030 psi | 89% | 2818 fps | 96.7% |
| Vihtavuori N550 | <<locked>> | 82% | 57,159 psi | 88% | 2776 fps | 100% |
| Vihtavuori N555 | <<locked>> | 88% | 57,783 psi | 89% | 2812 fps | 100% |
| Vihtavuori N560 | <<locked>> | 88% | 57,450 psi | 88% | 2890 fps | 99.6% |
| Vihtavuori N565 | <<locked>> | 94% | 58,262 psi | 90% | 2877 fps | 99.8% |
| Vihtavuori N568 | <<locked>> | 96% | 55,724 psi | 86% | 2884 fps | 99% |
| Vihtavuori N570 | <<locked>> | 98% | 56,985 psi | 88% | 2940 fps | 97.8% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 57,421 psi | 88% | 2720 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 90% | 55,506 psi | 85% | 2867 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 90% | 58,798 psi | 90% | 2812 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% | 41,234 psi | 63% | 2523 fps | 99.7% |
| Accurate 4350 | <<locked>> | 80% | 54,418 psi | 84% | 2749 fps | 100% |
| Accurate MAGPRO | <<locked>> | 80% | 42,569 psi | 66% | 2635 fps | 96.4% |
| ADI AR 2209 | <<locked>> | 80% | 45,223 psi | 70% | 2648 fps | 98.9% |
| ADI AR 2213 | <<locked>> | 80% | 40,524 psi | 62% | 2585 fps | 96.9% |
| ADI AR 2217 | <<locked>> | 84% | 34,534 psi | 53% | 2444 fps | 95% |
| ADI AR 2218 | <<locked>> | 96% | 45,339 psi | 70% | 2743 fps | 95% |
| ADI AR 2225 | <<locked>> | 82% | 29,486 psi | 45% | 2356 fps | 95.9% |
| Alliant Reloder-16 | <<locked>> | 80% | 51,822 psi | 80% | 2753 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 45,194 psi | 70% | 2641 fps | 98.9% |
| Alliant Reloder-22 | <<locked>> | 80% | 41,191 psi | 63% | 2592 fps | 98.2% |
| Alliant Reloder-23 | <<locked>> | 80% | 39,943 psi | 61% | 2543 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 34,476 psi | 53% | 2477 fps | 99.2% |
| Alliant Reloder-26 | <<locked>> | 80% | 44,976 psi | 69% | 2697 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 94% | 46,195 psi | 71% | 2740 fps | 95.6% |
| Baschieri & Pellagri 109 | <<locked>> | 84% | 45,063 psi | 69% | 2615 fps | 95.3% |
| Bofors RP15 | <<locked>> | 80% | 38,348 psi | 59% | 2533 fps | 97.3% |
| Bofors RP30 | <<locked>> | 82% | 34,301 psi | 53% | 2461 fps | 95.2% |
| Bofors RP5 | <<locked>> | 80% | 41,191 psi | 63% | 2592 fps | 98.2% |
| Hodgdon H1000 | <<locked>> | 82% | 35,201 psi | 54% | 2464 fps | 96% |
| Hodgdon H4831 | <<locked>> | 80% | 43,178 psi | 66% | 2589 fps | 97% |
| Hodgdon H4831 SC | <<locked>> | 80% | 42,395 psi | 65% | 2572 fps | 96.8% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 48,907 psi | 75% | 2635 fps | 100% |
| Hodgdon Retumbo | 74.5 gr | 80% | 33,678 psi | 52% | 2503 fps | 96.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,210 psi | 43% | 1621 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 50,923 psi | 78% | 2687 fps | 99.9% |
| IMR 4831 | <<locked>> | 80% | 51,300 psi | 79% | 2694 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 44,353 psi | 68% | 2582 fps | 97.5% |
| IMR 7828 SSC | <<locked>> | 80% | 39,233 psi | 60% | 2566 fps | 96.5% |
| IMR 8133 Enduron | <<locked>> | 90% | 35,273 psi | 54% | 2500 fps | 95.5% |
| Lovex S065 | <<locked>> | 80% | 54,505 psi | 84% | 2720 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 52,953 psi | 81% | 2717 fps | 100% |
| Lovex S071 | <<locked>> | 80% | 35,404 psi | 54% | 2405 fps | 98.7% |
| Norma 204 | <<locked>> | 80% | 51,706 psi | 80% | 2736 fps | 99.6% |
| Norma 217 | <<locked>> | 86% | 30,908 psi | 48% | 2411 fps | 95.9% |
| Norma MRP | <<locked>> | 80% | 43,656 psi | 67% | 2661 fps | 99.6% |
| Norma URP | <<locked>> | 80% | 52,765 psi | 81% | 2733 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 39,175 psi | 60% | 2575 fps | 97% |
| Ramshot Hunter | <<locked>> | 80% | 51,721 psi | 80% | 2736 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 35,186 psi | 54% | 2461 fps | 97.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,790 psi | 44% | 1657 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 54,534 psi | 84% | 2769 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 53,055 psi | 82% | 2792 fps | 100% |
| ReloadSwiss RS 76 | 79.7 gr | 80% | 32,880 psi | 51% | 2477 fps | 97.6% |
| ReloadSwiss RS 80 | 88.4 gr | 88% | 40,582 psi | 62% | 2625 fps | 96.1% |
| Rottweil R 904 | <<locked>> | 80% | 46,079 psi | 71% | 2621 fps | 98.3% |
| Rottweil R 905 | <<locked>> | 80% | 44,657 psi | 69% | 2628 fps | 98.9% |
| Shooters World Long Rifle | <<locked>> | 80% | 54,505 psi | 84% | 2720 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 52,953 psi | 81% | 2717 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 53,272 psi | 82% | 2671 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 44,338 psi | 68% | 2625 fps | 98.9% |
| Somchem S361 | <<locked>> | 80% | 47,094 psi | 72% | 2608 fps | 97.9% |
| Somchem S365 | <<locked>> | 80% | 50,444 psi | 78% | 2687 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 45,208 psi | 70% | 2608 fps | 99.5% |
| Vihtavuori N160 | <<locked>> | 80% | 54,201 psi | 83% | 2723 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 39,407 psi | 61% | 2487 fps | 98.3% |
| Vihtavuori N170 | <<locked>> | 92% | 50,560 psi | 78% | 2700 fps | 95% |
| Vihtavuori N550 | <<locked>> | 80% | 53,534 psi | 82% | 2730 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 44,338 psi | 68% | 2615 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 43,424 psi | 67% | 2654 fps | 97.3% |
| Vihtavuori N565 | <<locked>> | 80% | 35,984 psi | 55% | 2477 fps | 95% |
| Vihtavuori N568 | <<locked>> | 88% | 41,814 psi | 64% | 2641 fps | 95.8% |
| Vihtavuori N570 | <<locked>> | 94% | 49,168 psi | 76% | 2815 fps | 96% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 53,577 psi | 82% | 2674 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 80% | 37,565 psi | 58% | 2589 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 41,611 psi | 64% | 2539 fps | 98.3% |
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 73 powders for .300 Rem. Ultra Mag. loaded with the .308 | 190gr | Berger VLD Target. Vihtavuori N570 delivers the highest muzzle velocity at 2,940 fps; across all powders the maximum-charge window runs from 1,804 fps to 2,940 fps. Accurate 8700 gives the best case fill at 100 %, and 73 of the 73 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 190.0 gr projectile in 0.308" calls for a 1:12.0 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 | 190gr | Berger VLD Target they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate 8700, 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.