Load Specifications
Load data in caliber .300 Rem. Ultra Mag. with .310 | 200gr | Rhino Solid Shank bullet and 59 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Vihtavuori N570, Hodgdon Retumbo 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>> | 88% | 56,478 psi | 87% | 2700 fps | 100% |
| Accurate MAGPRO | <<locked>> | 86% | 55,259 psi | 85% | 2799 fps | 99.4% |
| ADI AR 2209 | <<locked>> | 86% | 57,653 psi | 89% | 2782 fps | 100% |
| ADI AR 2213 | <<locked>> | 88% | 56,130 psi | 86% | 2799 fps | 99.9% |
| ADI AR 2217 | <<locked>> | 98% | 58,798 psi | 90% | 2828 fps | 100% |
| ADI AR 2218ᴾ | <<locked>> | 100% | 55,259 psi | 85% | 2877 fps | 98.5% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 57,421 psi | 88% | 2844 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 86% | 57,769 psi | 89% | 2779 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 82% | 57,725 psi | 89% | 2766 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 57,130 psi | 88% | 2772 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 88% | 56,594 psi | 87% | 2792 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 90% | 58,276 psi | 90% | 2749 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 94% | 58,769 psi | 90% | 2822 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 84% | 55,143 psi | 85% | 2785 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 98% | 56,956 psi | 88% | 2861 fps | 98.6% |
| Alliant Reloder-50ᴾ | <<locked>> | 100% | 52,402 psi | 81% | 2782 fps | 97.3% |
| Baschieri & Pellagri 109 | <<locked>> | 90% | 56,724 psi | 87% | 2759 fps | 98.5% |
| Bofors RP15 | <<locked>> | 90% | 55,782 psi | 86% | 2779 fps | 100% |
| Bofors RP30 | <<locked>> | 96% | 58,479 psi | 90% | 2841 fps | 100% |
| Bofors RP5 | <<locked>> | 88% | 56,594 psi | 87% | 2792 fps | 100% |
| Hodgdon H1000 | <<locked>> | 94% | 56,246 psi | 87% | 2792 fps | 100% |
| Hodgdon H4831 | <<locked>> | 86% | 55,158 psi | 85% | 2733 fps | 99.5% |
| Hodgdon H4831 SC | <<locked>> | 88% | 58,001 psi | 89% | 2772 fps | 99.7% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 57,856 psi | 89% | 2690 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 94% | 57,754 psi | 89% | 2907 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,666 psi | 58% | 1765 fps | 100% |
| IMR 4350 | <<locked>> | 82% | 56,188 psi | 86% | 2707 fps | 100% |
| IMR 4831 | <<locked>> | 82% | 56,884 psi | 88% | 2707 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 86% | 55,651 psi | 86% | 2713 fps | 99.6% |
| IMR 7828 SSC | <<locked>> | 90% | 58,363 psi | 90% | 2835 fps | 100% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 52,634 psi | 81% | 2772 fps | 99.8% |
| Lovex S070 | <<locked>> | 82% | 58,436 psi | 90% | 2733 fps | 100% |
| Lovex S071 | <<locked>> | 94% | 58,131 psi | 89% | 2720 fps | 100% |
| Norma 204 | <<locked>> | 82% | 57,522 psi | 89% | 2762 fps | 100% |
| Norma 217ᴾ | <<locked>> | 100% | 53,708 psi | 83% | 2792 fps | 100% |
| Norma MRP | <<locked>> | 86% | 56,681 psi | 87% | 2808 fps | 100% |
| Norma URP | <<locked>> | 82% | 58,494 psi | 90% | 2749 fps | 100% |
| Ramshot Grand | <<locked>> | 88% | 55,564 psi | 86% | 2799 fps | 99.9% |
| Ramshot Hunter | <<locked>> | 82% | 57,537 psi | 89% | 2756 fps | 100% |
| Ramshot Magnum | <<locked>> | 92% | 58,233 psi | 90% | 2785 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,609 psi | 59% | 1808 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 92% | 54,636 psi | 84% | 2838 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 96% | 58,392 psi | 90% | 2867 fps | 99.8% |
| Rottweil R 904 | <<locked>> | 86% | 58,175 psi | 90% | 2756 fps | 99.9% |
| Rottweil R 905 | <<locked>> | 86% | 56,927 psi | 88% | 2766 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 58,436 psi | 90% | 2733 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 56,536 psi | 87% | 2762 fps | 100% |
| Somchem S361 | <<locked>> | 84% | 55,825 psi | 86% | 2690 fps | 99.5% |
| Somchem S365 | <<locked>> | 82% | 56,275 psi | 87% | 2700 fps | 100% |
| Somchem S385 | <<locked>> | 86% | 57,334 psi | 88% | 2733 fps | 100% |
| Vihtavuori N165 | <<locked>> | 90% | 57,159 psi | 88% | 2720 fps | 100% |
| Vihtavuori N170 | <<locked>> | 94% | 56,376 psi | 87% | 2740 fps | 97% |
| Vihtavuori N555 | <<locked>> | 86% | 56,405 psi | 87% | 2730 fps | 100% |
| Vihtavuori N560 | <<locked>> | 86% | 56,086 psi | 86% | 2808 fps | 99.7% |
| Vihtavuori N565 | <<locked>> | 92% | 57,000 psi | 88% | 2802 fps | 99.8% |
| Vihtavuori N568 | <<locked>> | 96% | 58,769 psi | 90% | 2867 fps | 99.6% |
| Vihtavuori N570 | <<locked>> | 96% | 55,898 psi | 86% | 2867 fps | 98.1% |
| Winchester StaBALL HD | <<locked>> | 90% | 58,552 psi | 90% | 2838 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 88% | 57,130 psi | 88% | 2733 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% | 43,004 psi | 66% | 2500 fps | 100% |
| Accurate MAGPRO | <<locked>> | 80% | 44,672 psi | 69% | 2621 fps | 97.5% |
| ADI AR 2209 | <<locked>> | 80% | 47,036 psi | 72% | 2621 fps | 99.5% |
| ADI AR 2213 | <<locked>> | 80% | 42,264 psi | 65% | 2569 fps | 97.9% |
| ADI AR 2217 | <<locked>> | 82% | 33,823 psi | 52% | 2379 fps | 95.4% |
| ADI AR 2218 | <<locked>> | 94% | 44,164 psi | 68% | 2671 fps | 95.3% |
| ADI AR 2225 | <<locked>> | 80% | 28,892 psi | 44% | 2293 fps | 96.3% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 47,384 psi | 73% | 2621 fps | 99.5% |
| Alliant Reloder-16 | <<locked>> | 80% | 54,085 psi | 83% | 2720 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 46,934 psi | 72% | 2615 fps | 99.5% |
| Alliant Reloder-22 | <<locked>> | 80% | 43,004 psi | 66% | 2572 fps | 99% |
| Alliant Reloder-23 | <<locked>> | 80% | 41,800 psi | 64% | 2516 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 36,129 psi | 56% | 2461 fps | 99.8% |
| Alliant Reloder-26 | <<locked>> | 80% | 47,427 psi | 73% | 2674 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 92% | 45,266 psi | 70% | 2667 fps | 95.9% |
| Alliant Reloder-50 | <<locked>> | 96% | 45,049 psi | 69% | 2657 fps | 95.3% |
| Baschieri & Pellagri 109 | <<locked>> | 82% | 43,729 psi | 67% | 2539 fps | 95.5% |
| Bofors RP15 | <<locked>> | 80% | 40,045 psi | 62% | 2513 fps | 98.3% |
| Bofors RP30 | <<locked>> | 80% | 33,663 psi | 52% | 2395 fps | 95.6% |
| Bofors RP5 | <<locked>> | 80% | 43,004 psi | 66% | 2572 fps | 99% |
| Hodgdon H1000 | <<locked>> | 80% | 34,330 psi | 53% | 2395 fps | 96.3% |
| Hodgdon H4831 | <<locked>> | 80% | 44,889 psi | 69% | 2566 fps | 97.9% |
| Hodgdon H4831 SC | <<locked>> | 80% | 44,063 psi | 68% | 2552 fps | 97.8% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 50,821 psi | 78% | 2602 fps | 100% |
| Hodgdon Retumbo | 74.7 gr | 80% | 35,259 psi | 54% | 2497 fps | 97.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,210 psi | 43% | 1581 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 52,634 psi | 81% | 2657 fps | 100% |
| IMR 4831 | <<locked>> | 80% | 53,200 psi | 82% | 2657 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 45,890 psi | 71% | 2556 fps | 98.3% |
| IMR 7828 SSC | <<locked>> | 80% | 41,133 psi | 63% | 2552 fps | 97.7% |
| IMR 8133 Enduron | <<locked>> | 88% | 34,824 psi | 54% | 2441 fps | 96% |
| Lovex S070 | <<locked>> | 80% | 54,766 psi | 84% | 2684 fps | 100% |
| Lovex S071 | <<locked>> | 80% | 37,130 psi | 57% | 2388 fps | 99.4% |
| Norma 204 | <<locked>> | 80% | 53,780 psi | 83% | 2710 fps | 99.9% |
| Norma 217 | <<locked>> | 82% | 28,427 psi | 44% | 2293 fps | 95.2% |
| Norma MRP | <<locked>> | 80% | 45,832 psi | 71% | 2641 fps | 99.9% |
| Norma URP | <<locked>> | 80% | 54,694 psi | 84% | 2697 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 41,104 psi | 63% | 2559 fps | 98.1% |
| Ramshot Hunter | <<locked>> | 80% | 53,824 psi | 83% | 2707 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 36,985 psi | 57% | 2444 fps | 98.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,964 psi | 45% | 1621 fps | 100% |
| ReloadSwiss RS 76 | 80 gr | 80% | 34,635 psi | 53% | 2474 fps | 98.8% |
| ReloadSwiss RS 80 | <<locked>> | 84% | 36,854 psi | 57% | 2493 fps | 95.2% |
| Rottweil R 904 | <<locked>> | 80% | 47,921 psi | 74% | 2598 fps | 99% |
| Rottweil R 905 | <<locked>> | 80% | 46,659 psi | 72% | 2608 fps | 99.5% |
| Shooters World SW4350 | <<locked>> | 80% | 54,766 psi | 84% | 2684 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 46,311 psi | 71% | 2605 fps | 99.5% |
| Somchem S361 | <<locked>> | 80% | 48,936 psi | 75% | 2585 fps | 98.7% |
| Somchem S365 | <<locked>> | 80% | 52,518 psi | 81% | 2654 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 46,978 psi | 72% | 2582 fps | 99.8% |
| Vihtavuori N165 | <<locked>> | 80% | 41,046 psi | 63% | 2467 fps | 99% |
| Vihtavuori N170 | <<locked>> | 90% | 49,356 psi | 76% | 2628 fps | 95.3% |
| Vihtavuori N555 | <<locked>> | 80% | 46,456 psi | 71% | 2589 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 45,513 psi | 70% | 2638 fps | 98.2% |
| Vihtavuori N565 | <<locked>> | 80% | 37,695 psi | 58% | 2464 fps | 96.3% |
| Vihtavuori N568 | <<locked>> | 84% | 38,116 psi | 59% | 2510 fps | 95% |
| Vihtavuori N570 | 87.3 gr | 90% | 44,962 psi | 69% | 2677 fps | 95.3% |
| Winchester StaBALL HD | <<locked>> | 80% | 40,089 psi | 62% | 2572 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 43,308 psi | 67% | 2516 fps | 99% |
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 59 powders for .300 Rem. Ultra Mag. loaded with the .310 | 200gr | Rhino Solid Shank. Hodgdon Retumbo delivers the highest muzzle velocity at 2,907 fps; across all powders the maximum-charge window runs from 1,765 fps to 2,907 fps. ADI AR 2218 gives the best case fill at 100 %, and 59 of the 59 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 200.0 gr projectile in 0.31" calls for a 1:13.0 twist; slower twists will usually not stabilise this weight. ADI AR 2218, ADI AR 2225, Alliant Reloder-50 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. Vihtavuori N570, Hodgdon Retumbo, ReloadSwiss RS 76 rank at the top here: for .300 Rem. Ultra Mag. with the .310 | 200gr | Rhino Solid Shank 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.