Load Specifications
Load data in caliber .338 Rem. Ultra Mag. with .338 | 250gr | Rhino Solid Shank bullet and 80 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Winchester StaBALL HD, IMR 7828 SSC and Vihtavuori N560.
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>> | 94% | 54,462 psi | 85% | 2595 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 55,912 psi | 88% | 2625 fps | 100% |
| Accurate High Country | <<locked>> | 92% | 55,941 psi | 88% | 2736 fps | 99.3% |
| Accurate MAGPRO | <<locked>> | 94% | 56,826 psi | 89% | 2740 fps | 98.7% |
| ADI AR 2208 | <<locked>> | 82% | 56,927 psi | 89% | 2585 fps | 100% |
| ADI AR 2209 | <<locked>> | 92% | 56,637 psi | 89% | 2677 fps | 99.7% |
| ADI AR 2213 | <<locked>> | 94% | 54,273 psi | 85% | 2680 fps | 99% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 48,704 psi | 76% | 2589 fps | 98.4% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 43,323 psi | 68% | 2556 fps | 99.7% |
| Alliant Power Pro Varmint | <<locked>> | 92% | 56,739 psi | 89% | 2674 fps | 99.7% |
| Alliant Power Pro Varmint | <<locked>> | 92% | 56,739 psi | 89% | 2674 fps | 99.7% |
| Alliant Reloder-16 | <<locked>> | 88% | 56,681 psi | 89% | 2674 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 82% | 54,099 psi | 85% | 2638 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 92% | 56,028 psi | 88% | 2667 fps | 99.7% |
| Alliant Reloder-22 | <<locked>> | 94% | 54,288 psi | 85% | 2680 fps | 99.7% |
| Alliant Reloder-23 | <<locked>> | 96% | 55,405 psi | 87% | 2648 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 54,795 psi | 86% | 2707 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 92% | 55,927 psi | 88% | 2733 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 96% | 56,144 psi | 88% | 2644 fps | 96.9% |
| Bofors RP15 | <<locked>> | 98% | 56,898 psi | 89% | 2713 fps | 99.8% |
| Bofors RP30ᴾ | <<locked>> | 100% | 50,821 psi | 80% | 2654 fps | 99% |
| Bofors RP5 | <<locked>> | 94% | 54,288 psi | 85% | 2680 fps | 99.7% |
| Bofors RP7 | <<locked>> | 84% | 54,723 psi | 86% | 2575 fps | 99.9% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 53,635 psi | 84% | 2667 fps | 99.5% |
| Hodgdon H414 | <<locked>> | 86% | 57,595 psi | 90% | 2674 fps | 100% |
| Hodgdon H4350 | <<locked>> | 84% | 56,507 psi | 89% | 2635 fps | 99.8% |
| Hodgdon H4831 | <<locked>> | 92% | 54,201 psi | 85% | 2625 fps | 98.4% |
| Hodgdon H4831 SC | <<locked>> | 94% | 56,869 psi | 89% | 2664 fps | 98.8% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 56,942 psi | 89% | 2598 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 53,548 psi | 84% | 2769 fps | 100% |
| Hodgdon Superformance | <<locked>> | 84% | 54,056 psi | 85% | 2657 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,999 psi | 58% | 1637 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 56,188 psi | 88% | 2612 fps | 99.9% |
| IMR 4451 Enduron | <<locked>> | 84% | 56,144 psi | 88% | 2598 fps | 100% |
| IMR 4831 | <<locked>> | 88% | 56,057 psi | 88% | 2615 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 55,463 psi | 87% | 2612 fps | 98.7% |
| IMR 7828 SSC | <<locked>> | 96% | 55,941 psi | 88% | 2717 fps | 99.3% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 38,914 psi | 61% | 2467 fps | 96.1% |
| Lovex S065 | <<locked>> | 86% | 56,724 psi | 89% | 2595 fps | 100% |
| Lovex S070 | <<locked>> | 86% | 54,853 psi | 86% | 2592 fps | 100% |
| Lovex S071ᴾ | <<locked>> | 100% | 55,477 psi | 87% | 2608 fps | 100% |
| Norma 204 | <<locked>> | 88% | 57,246 psi | 90% | 2664 fps | 99.7% |
| Norma 217ᴾ | <<locked>> | 100% | 38,957 psi | 61% | 2490 fps | 98.4% |
| Norma MRP | <<locked>> | 92% | 54,128 psi | 85% | 2697 fps | 100% |
| Norma URP | <<locked>> | 86% | 54,201 psi | 85% | 2608 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 56,739 psi | 89% | 2733 fps | 99.6% |
| Ramshot Hunter | <<locked>> | 88% | 56,724 psi | 89% | 2664 fps | 100% |
| Ramshot Magnum | <<locked>> | 98% | 54,853 psi | 86% | 2671 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,840 psi | 59% | 1677 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 57,566 psi | 90% | 2671 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 55,753 psi | 87% | 2644 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 54,099 psi | 85% | 2674 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 54,259 psi | 85% | 2769 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 49,153 psi | 77% | 2664 fps | 97.6% |
| Rottweil R 903 | <<locked>> | 82% | 55,999 psi | 88% | 2575 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 54,244 psi | 85% | 2598 fps | 98.9% |
| Rottweil R 905 | <<locked>> | 92% | 55,593 psi | 87% | 2657 fps | 99.7% |
| Rottweil R 907 | <<locked>> | 84% | 54,723 psi | 86% | 2575 fps | 99.9% |
| Shooters World Long Rifle | <<locked>> | 86% | 56,724 psi | 89% | 2595 fps | 100% |
| Shooters World SW4350 | <<locked>> | 86% | 54,853 psi | 86% | 2592 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 57,537 psi | 90% | 2628 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 55,767 psi | 87% | 2454 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 55,970 psi | 88% | 2552 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 55,158 psi | 86% | 2654 fps | 99.7% |
| Somchem S355 | <<locked>> | 82% | 55,637 psi | 87% | 2569 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 55,796 psi | 87% | 2592 fps | 98.6% |
| Somchem S365 | <<locked>> | 88% | 54,578 psi | 86% | 2608 fps | 100% |
| Somchem S385 | <<locked>> | 92% | 56,115 psi | 88% | 2631 fps | 99.9% |
| Vihtavuori N150 | <<locked>> | 84% | 56,913 psi | 89% | 2543 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 56,115 psi | 88% | 2602 fps | 100% |
| Vihtavuori N165 | <<locked>> | 96% | 55,651 psi | 87% | 2612 fps | 99.9% |
| Vihtavuori N550 | <<locked>> | 86% | 55,172 psi | 86% | 2605 fps | 100% |
| Vihtavuori N555 | <<locked>> | 92% | 54,157 psi | 85% | 2628 fps | 100% |
| Vihtavuori N560 | <<locked>> | 94% | 57,711 psi | 90% | 2749 fps | 99.2% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 57,551 psi | 90% | 2726 fps | 99.3% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 50,357 psi | 79% | 2671 fps | 97.3% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 55,521 psi | 87% | 2559 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 53,969 psi | 85% | 2625 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 98% | 56,971 psi | 89% | 2776 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 56,043 psi | 88% | 2628 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% | 33,939 psi | 53% | 2251 fps | 97.8% |
| Accurate 4350 | <<locked>> | 80% | 45,527 psi | 71% | 2477 fps | 100% |
| Accurate High Country | <<locked>> | 82% | 39,436 psi | 62% | 2454 fps | 96% |
| Accurate MAGPRO | <<locked>> | 86% | 42,844 psi | 67% | 2510 fps | 95.6% |
| ADI AR 2208 | <<locked>> | 80% | 53,374 psi | 84% | 2536 fps | 100% |
| ADI AR 2209 | <<locked>> | 80% | 37,927 psi | 59% | 2365 fps | 96.5% |
| ADI AR 2213 | <<locked>> | 84% | 38,769 psi | 61% | 2408 fps | 95.3% |
| ADI AR 2217 | <<locked>> | 92% | 37,304 psi | 58% | 2372 fps | 95% |
| ADI AR 2225 | <<locked>> | 90% | 31,473 psi | 49% | 2287 fps | 96% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 38,334 psi | 60% | 2369 fps | 96.6% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 38,334 psi | 60% | 2369 fps | 96.6% |
| Alliant Reloder-16 | <<locked>> | 80% | 43,627 psi | 68% | 2484 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 80% | 50,328 psi | 79% | 2589 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 37,985 psi | 60% | 2362 fps | 96.5% |
| Alliant Reloder-22 | <<locked>> | 80% | 33,837 psi | 53% | 2310 fps | 95.2% |
| Alliant Reloder-23 | <<locked>> | 80% | 32,605 psi | 51% | 2280 fps | 99.8% |
| Alliant Reloder-25 | <<locked>> | 80% | 28,384 psi | 44% | 2195 fps | 96.3% |
| Alliant Reloder-26 | <<locked>> | 80% | 35,578 psi | 56% | 2405 fps | 99.4% |
| Baschieri & Pellagri 109 | <<locked>> | 92% | 49,705 psi | 78% | 2543 fps | 95.4% |
| Bofors RP15 | <<locked>> | 84% | 36,027 psi | 56% | 2359 fps | 95.9% |
| Bofors RP30 | <<locked>> | 90% | 36,071 psi | 57% | 2388 fps | 95.2% |
| Bofors RP5 | <<locked>> | 80% | 33,837 psi | 53% | 2310 fps | 95.2% |
| Bofors RP7 | <<locked>> | 80% | 48,254 psi | 76% | 2480 fps | 99.4% |
| Hodgdon H1000 | <<locked>> | 88% | 35,650 psi | 56% | 2339 fps | 95.1% |
| Hodgdon H414 | <<locked>> | 80% | 47,195 psi | 74% | 2523 fps | 99.6% |
| Hodgdon H4350 | <<locked>> | 80% | 49,734 psi | 78% | 2536 fps | 99.2% |
| Hodgdon H4831 | <<locked>> | 84% | 41,408 psi | 65% | 2415 fps | 95.6% |
| Hodgdon H4831 SC | <<locked>> | 84% | 40,654 psi | 64% | 2402 fps | 95.3% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 41,147 psi | 64% | 2379 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 86% | 33,736 psi | 53% | 2375 fps | 95.6% |
| Hodgdon Superformance | <<locked>> | 80% | 46,731 psi | 73% | 2546 fps | 99.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,717 psi | 43% | 1463 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 43,656 psi | 68% | 2418 fps | 98.8% |
| IMR 4451 Enduron | <<locked>> | 80% | 49,632 psi | 78% | 2503 fps | 99.7% |
| IMR 4831 | <<locked>> | 80% | 43,410 psi | 68% | 2431 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 82% | 40,466 psi | 63% | 2362 fps | 95.4% |
| IMR 7828 SSC | 77 gr | 86% | 39,842 psi | 62% | 2441 fps | 95.8% |
| IMR 8133 Enduron | <<locked>> | 98% | 36,506 psi | 57% | 2411 fps | 95.1% |
| Lovex S065 | <<locked>> | 80% | 47,239 psi | 74% | 2457 fps | 99.9% |
| Lovex S070 | <<locked>> | 80% | 45,426 psi | 71% | 2448 fps | 99.5% |
| Lovex S071 | <<locked>> | 80% | 29,225 psi | 46% | 2142 fps | 96.1% |
| Norma 204 | <<locked>> | 80% | 43,627 psi | 68% | 2454 fps | 97.9% |
| Norma 217 | <<locked>> | 94% | 31,923 psi | 50% | 2326 fps | 95.7% |
| Norma MRP | <<locked>> | 80% | 35,331 psi | 55% | 2369 fps | 97.3% |
| Norma URP | <<locked>> | 80% | 44,585 psi | 70% | 2467 fps | 100% |
| Ramshot Grand | <<locked>> | 84% | 36,811 psi | 58% | 2388 fps | 95.1% |
| Ramshot Hunter | <<locked>> | 80% | 43,439 psi | 68% | 2464 fps | 99.6% |
| Ramshot Magnum | <<locked>> | 84% | 32,764 psi | 51% | 2283 fps | 95.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,384 psi | 44% | 1499 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 53,461 psi | 84% | 2625 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 45,397 psi | 71% | 2497 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 43,656 psi | 68% | 2513 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 84% | 30,676 psi | 48% | 2293 fps | 95.3% |
| ReloadSwiss RS 80 | <<locked>> | 96% | 42,235 psi | 66% | 2543 fps | 95.7% |
| Rottweil R 903 | <<locked>> | 80% | 52,431 psi | 82% | 2530 fps | 100% |
| Rottweil R 904 | <<locked>> | 80% | 39,349 psi | 62% | 2349 fps | 95.7% |
| Rottweil R 905 | <<locked>> | 80% | 37,347 psi | 59% | 2349 fps | 96.5% |
| Rottweil R 907 | <<locked>> | 80% | 48,254 psi | 76% | 2480 fps | 99.4% |
| Shooters World Long Rifle | <<locked>> | 80% | 47,239 psi | 74% | 2457 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 80% | 45,426 psi | 71% | 2448 fps | 99.5% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 53,766 psi | 84% | 2579 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 52,431 psi | 82% | 2415 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 46,224 psi | 72% | 2411 fps | 99.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 37,014 psi | 58% | 2346 fps | 96.4% |
| Somchem S355 | <<locked>> | 80% | 52,344 psi | 82% | 2526 fps | 100% |
| Somchem S361 | <<locked>> | 80% | 40,059 psi | 63% | 2339 fps | 95.1% |
| Somchem S365 | <<locked>> | 80% | 41,568 psi | 65% | 2425 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 37,898 psi | 59% | 2336 fps | 97.5% |
| Vihtavuori N150 | <<locked>> | 80% | 49,980 psi | 78% | 2454 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 46,064 psi | 72% | 2461 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 32,764 psi | 51% | 2221 fps | 95.3% |
| Vihtavuori N550 | <<locked>> | 80% | 45,498 psi | 71% | 2464 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 36,550 psi | 57% | 2346 fps | 99.8% |
| Vihtavuori N560 | 78.1 gr | 84% | 40,828 psi | 64% | 2470 fps | 95.7% |
| Vihtavuori N565 | <<locked>> | 88% | 38,247 psi | 60% | 2408 fps | 95.1% |
| Vihtavuori N568 | <<locked>> | 96% | 43,787 psi | 69% | 2556 fps | 95.5% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 45,078 psi | 71% | 2421 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 47,355 psi | 74% | 2526 fps | 99.6% |
| Winchester StaBALL HD | 73.6 gr | 80% | 28,892 psi | 45% | 2297 fps | 99.9% |
| Winchester Supreme 780 | <<locked>> | 80% | 34,461 psi | 54% | 2264 fps | 95.3% |
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 80 powders for .338 Rem. Ultra Mag. loaded with the .338 | 250gr | Rhino Solid Shank. Winchester StaBALL HD delivers the highest muzzle velocity at 2,776 fps; across all powders the maximum-charge window runs from 1,637 fps to 2,776 fps. ADI AR 2217 gives the best case fill at 100 %, and 80 of the 80 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 58–90 %, leaving at least 10 % headroom. The 250.0 gr projectile in 0.338" calls for a 1:15.0 twist; slower twists will usually not stabilise this weight. ADI AR 2217, ADI AR 2225, Alliant Reloder-25 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. Winchester StaBALL HD, IMR 7828 SSC, Vihtavuori N560 rank at the top here: for .338 Rem. Ultra Mag. with the .338 | 250gr | 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.