Load Specifications
Load data in caliber .300 Rem. Ultra Mag. with .308 | 220gr | Rhino Solid Shank bullet and 53 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Vihtavuori N570, Alliant Reloder-33 and Hodgdon Retumbo.
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>> | 86% | 55,187 psi | 85% | 2572 fps | 100% |
| Accurate 8700ᴾ | <<locked>> | 100% | 46,122 psi | 71% | 2536 fps | 96.5% |
| Accurate MAGPRO | <<locked>> | 86% | 57,972 psi | 89% | 2726 fps | 99.9% |
| ADI AR 2209 | <<locked>> | 84% | 56,246 psi | 87% | 2651 fps | 100% |
| ADI AR 2213 | <<locked>> | 88% | 58,726 psi | 90% | 2723 fps | 100% |
| ADI AR 2217 | <<locked>> | 96% | 57,508 psi | 89% | 2700 fps | 100% |
| ADI AR 2218ᴾ | <<locked>> | 100% | 58,073 psi | 89% | 2822 fps | 99.5% |
| ADI AR 2225 | <<locked>> | 98% | 56,652 psi | 87% | 2720 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 84% | 55,840 psi | 86% | 2641 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 86% | 55,390 psi | 85% | 2664 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 88% | 57,232 psi | 88% | 2621 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 92% | 57,682 psi | 89% | 2694 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 84% | 58,073 psi | 89% | 2707 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 96% | 55,854 psi | 86% | 2740 fps | 99% |
| Alliant Reloder-50ᴾ | <<locked>> | 100% | 55,521 psi | 85% | 2730 fps | 98.6% |
| Baschieri & Pellagri 109 | <<locked>> | 88% | 55,317 psi | 85% | 2635 fps | 98.9% |
| Bofors RP15 | <<locked>> | 90% | 58,523 psi | 90% | 2707 fps | 100% |
| Bofors RP30 | <<locked>> | 94% | 57,551 psi | 89% | 2717 fps | 100% |
| Bofors RP5 | <<locked>> | 86% | 55,390 psi | 85% | 2664 fps | 100% |
| Hodgdon H1000 | <<locked>> | 92% | 55,158 psi | 85% | 2667 fps | 100% |
| Hodgdon H4831 | <<locked>> | 86% | 57,609 psi | 89% | 2657 fps | 99.9% |
| Hodgdon H4831 SC | <<locked>> | 86% | 56,565 psi | 87% | 2644 fps | 99.9% |
| Hodgdon Hybrid 100V | <<locked>> | 82% | 56,652 psi | 87% | 2562 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 92% | 56,942 psi | 88% | 2776 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,884 psi | 58% | 1686 fps | 100% |
| IMR 4350 | <<locked>> | 82% | 58,320 psi | 90% | 2621 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 86% | 57,769 psi | 89% | 2638 fps | 100% |
| IMR 7828 SSC | <<locked>> | 88% | 57,174 psi | 88% | 2707 fps | 100% |
| IMR 7977 Enduron | <<locked>> | 92% | 56,217 psi | 87% | 2589 fps | 96.2% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 55,492 psi | 85% | 2703 fps | 100% |
| Lovex S071 | <<locked>> | 92% | 57,014 psi | 88% | 2595 fps | 100% |
| Norma 217ᴾ | <<locked>> | 100% | 56,855 psi | 88% | 2720 fps | 100% |
| Norma MRP | <<locked>> | 84% | 55,376 psi | 85% | 2674 fps | 100% |
| Ramshot Grand | <<locked>> | 88% | 58,610 psi | 90% | 2726 fps | 100% |
| Ramshot Magnum | <<locked>> | 90% | 57,043 psi | 88% | 2661 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,899 psi | 60% | 1726 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 92% | 57,957 psi | 89% | 2766 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 94% | 57,159 psi | 88% | 2743 fps | 99.9% |
| Rottweil R 904 | <<locked>> | 84% | 56,637 psi | 87% | 2621 fps | 100% |
| Rottweil R 905 | <<locked>> | 84% | 55,651 psi | 86% | 2635 fps | 100% |
| SNPE Vectan SP 13ᴾ | <<locked>> | 100% | 48,196 psi | 74% | 2549 fps | 96.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 55,259 psi | 85% | 2631 fps | 100% |
| Somchem S361 | <<locked>> | 84% | 58,131 psi | 89% | 2615 fps | 99.9% |
| Somchem S385 | <<locked>> | 84% | 55,912 psi | 86% | 2605 fps | 100% |
| Vihtavuori N165 | <<locked>> | 88% | 55,883 psi | 86% | 2592 fps | 100% |
| Vihtavuori N170 | <<locked>> | 92% | 55,143 psi | 85% | 2621 fps | 97.5% |
| Vihtavuori N555 | <<locked>> | 84% | 55,405 psi | 85% | 2602 fps | 100% |
| Vihtavuori N560 | <<locked>> | 86% | 58,682 psi | 90% | 2736 fps | 100% |
| Vihtavuori N565 | <<locked>> | 90% | 55,985 psi | 86% | 2677 fps | 100% |
| Vihtavuori N568 | <<locked>> | 94% | 57,508 psi | 89% | 2743 fps | 99.8% |
| Vihtavuori N570 | <<locked>> | 94% | 54,984 psi | 85% | 2746 fps | 98.6% |
| Winchester StaBALL HD | <<locked>> | 88% | 57,711 psi | 89% | 2707 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 86% | 55,738 psi | 86% | 2605 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% | 45,194 psi | 70% | 2431 fps | 100% |
| Accurate 8700 | <<locked>> | 98% | 42,873 psi | 66% | 2480 fps | 95.5% |
| Accurate MAGPRO | <<locked>> | 80% | 46,905 psi | 72% | 2559 fps | 98.7% |
| ADI AR 2209 | <<locked>> | 80% | 49,226 psi | 76% | 2549 fps | 99.9% |
| ADI AR 2213 | <<locked>> | 80% | 44,512 psi | 69% | 2507 fps | 99% |
| ADI AR 2217 | <<locked>> | 80% | 33,185 psi | 51% | 2277 fps | 96.3% |
| ADI AR 2218 | <<locked>> | 90% | 40,335 psi | 62% | 2500 fps | 95% |
| ADI AR 2225 | <<locked>> | 80% | 30,545 psi | 47% | 2254 fps | 98.3% |
| Alliant Reloder-19 | <<locked>> | 80% | 49,110 psi | 76% | 2546 fps | 99.9% |
| Alliant Reloder-22 | <<locked>> | 80% | 45,281 psi | 70% | 2510 fps | 99.7% |
| Alliant Reloder-23 | <<locked>> | 80% | 44,005 psi | 68% | 2444 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 38,218 psi | 59% | 2402 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 80% | 50,082 psi | 77% | 2602 fps | 100% |
| Alliant Reloder-33 | 86.6 gr | 88% | 41,321 psi | 64% | 2500 fps | 95.7% |
| Alliant Reloder-50 | <<locked>> | 92% | 41,278 psi | 64% | 2490 fps | 95% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 42,627 psi | 66% | 2425 fps | 96.2% |
| Bofors RP15 | <<locked>> | 80% | 42,119 psi | 65% | 2451 fps | 99.3% |
| Bofors RP30 | <<locked>> | 80% | 35,708 psi | 55% | 2346 fps | 97.4% |
| Bofors RP5 | <<locked>> | 80% | 45,281 psi | 70% | 2510 fps | 99.7% |
| Hodgdon H1000 | <<locked>> | 80% | 36,085 psi | 56% | 2346 fps | 98% |
| Hodgdon H4831 | <<locked>> | 80% | 46,891 psi | 72% | 2500 fps | 99% |
| Hodgdon H4831 SC | <<locked>> | 80% | 46,195 psi | 71% | 2487 fps | 98.9% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 53,055 psi | 82% | 2516 fps | 100% |
| Hodgdon Retumbo | 73 gr | 80% | 37,362 psi | 57% | 2451 fps | 99.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,485 psi | 44% | 1509 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 54,795 psi | 84% | 2575 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 47,805 psi | 74% | 2487 fps | 99.2% |
| IMR 7828 SSC | <<locked>> | 80% | 43,250 psi | 67% | 2490 fps | 98.9% |
| IMR 7977 Enduron | <<locked>> | 90% | 52,895 psi | 81% | 2539 fps | 95.4% |
| IMR 8133 Enduron | <<locked>> | 84% | 32,140 psi | 49% | 2283 fps | 95.8% |
| Lovex S071 | <<locked>> | 80% | 38,914 psi | 60% | 2326 fps | 99.9% |
| Norma 217 | <<locked>> | 80% | 28,268 psi | 44% | 2201 fps | 96.4% |
| Norma MRP | <<locked>> | 80% | 48,124 psi | 74% | 2572 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 43,511 psi | 67% | 2503 fps | 99.2% |
| Ramshot Magnum | <<locked>> | 80% | 39,233 psi | 60% | 2392 fps | 99.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,153 psi | 45% | 1542 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 36,666 psi | 56% | 2425 fps | 99.7% |
| ReloadSwiss RS 80 | <<locked>> | 82% | 36,289 psi | 56% | 2385 fps | 96.1% |
| Rottweil R 904 | <<locked>> | 80% | 49,748 psi | 77% | 2523 fps | 99.6% |
| Rottweil R 905 | <<locked>> | 80% | 48,718 psi | 75% | 2533 fps | 99.9% |
| SNPE Vectan SP 13 | <<locked>> | 98% | 44,889 psi | 69% | 2493 fps | 95.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 48,385 psi | 74% | 2533 fps | 99.9% |
| Somchem S361 | <<locked>> | 80% | 50,850 psi | 78% | 2513 fps | 99.4% |
| Somchem S385 | <<locked>> | 80% | 49,197 psi | 76% | 2510 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 43,062 psi | 66% | 2405 fps | 99.7% |
| Vihtavuori N170 | <<locked>> | 86% | 45,020 psi | 69% | 2461 fps | 95.1% |
| Vihtavuori N555 | <<locked>> | 80% | 48,588 psi | 75% | 2510 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 47,645 psi | 73% | 2569 fps | 99.2% |
| Vihtavuori N565 | <<locked>> | 80% | 39,755 psi | 61% | 2408 fps | 97.8% |
| Vihtavuori N568 | <<locked>> | 82% | 37,449 psi | 58% | 2402 fps | 95.9% |
| Vihtavuori N570 | 81.4 gr | 86% | 41,147 psi | 63% | 2507 fps | 95.1% |
| Winchester StaBALL HD | <<locked>> | 80% | 42,670 psi | 66% | 2503 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 45,310 psi | 70% | 2451 fps | 99.7% |
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 60 powders for .300 Rem. Ultra Mag. loaded with the .308 | 220gr | Rhino Solid Shank. ADI AR 2218 delivers the highest muzzle velocity at 2,822 fps; across all powders the maximum-charge window runs from 1,686 fps to 2,822 fps. Accurate 8700 gives the best case fill at 100 %, and 60 of the 60 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 220.0 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, 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, Alliant Reloder-33, Hodgdon Retumbo rank at the top here: for .300 Rem. Ultra Mag. with the .308 | 220gr | Rhino Solid Shank they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Hodgdon 50BMG, Hodgdon US 869, Vihtavuori 20N29 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.