Load Specifications
Load data in caliber .338 Rem. Ultra Mag. with .338 | 250gr | Nosler Expansion Tip bullet and 84 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Accurate High Country, Alliant Reloder-26 and Norma MRP.
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>> | 98% | 57,522 psi | 90% | 2618 fps | 100% |
| Accurate 4350 | <<locked>> | 88% | 55,608 psi | 87% | 2608 fps | 100% |
| Accurate High Country | <<locked>> | 94% | 55,129 psi | 86% | 2710 fps | 99% |
| Accurate MAGPRO | <<locked>> | 96% | 56,028 psi | 88% | 2713 fps | 98.2% |
| ADI AR 2208 | <<locked>> | 84% | 57,261 psi | 90% | 2572 fps | 100% |
| ADI AR 2209 | <<locked>> | 94% | 56,376 psi | 88% | 2657 fps | 99.6% |
| ADI AR 2213 | <<locked>> | 98% | 57,682 psi | 90% | 2710 fps | 99.1% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 45,078 psi | 71% | 2507 fps | 97.1% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 40,030 psi | 63% | 2474 fps | 98.8% |
| Alliant Power Pro Varmint | <<locked>> | 94% | 56,550 psi | 89% | 2654 fps | 99.6% |
| Alliant Power Pro Varmint | <<locked>> | 94% | 56,550 psi | 89% | 2654 fps | 99.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 55,027 psi | 86% | 2549 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 90% | 56,333 psi | 88% | 2657 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 86% | 57,638 psi | 90% | 2671 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 55,811 psi | 87% | 2648 fps | 99.5% |
| Alliant Reloder-22 | <<locked>> | 98% | 57,276 psi | 90% | 2707 fps | 99.7% |
| Alliant Reloder-23 | <<locked>> | 98% | 54,650 psi | 86% | 2631 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 50,459 psi | 79% | 2635 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 94% | 54,795 psi | 86% | 2713 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 98% | 56,333 psi | 88% | 2625 fps | 96.4% |
| Bofors RP15ᴾ | <<locked>> | 100% | 56,188 psi | 88% | 2690 fps | 99.6% |
| Bofors RP3 | <<locked>> | 82% | 55,869 psi | 88% | 2562 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 46,267 psi | 73% | 2575 fps | 97.9% |
| Bofors RP5 | <<locked>> | 98% | 57,276 psi | 90% | 2707 fps | 99.7% |
| Bofors RP7 | <<locked>> | 86% | 54,998 psi | 86% | 2562 fps | 99.8% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 49,617 psi | 78% | 2585 fps | 98.7% |
| Hodgdon H380 | <<locked>> | 82% | 56,086 psi | 88% | 2582 fps | 100% |
| Hodgdon H414 | <<locked>> | 88% | 57,464 psi | 90% | 2657 fps | 100% |
| Hodgdon H4350 | <<locked>> | 86% | 56,724 psi | 89% | 2618 fps | 99.7% |
| Hodgdon H4831 | <<locked>> | 94% | 54,172 psi | 85% | 2605 fps | 98.1% |
| Hodgdon H4831 SC | <<locked>> | 96% | 56,594 psi | 89% | 2638 fps | 98.4% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 56,623 psi | 89% | 2582 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 49,371 psi | 77% | 2690 fps | 99.6% |
| Hodgdon Superformance | <<locked>> | 86% | 53,853 psi | 84% | 2641 fps | 99.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,767 psi | 58% | 1608 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 56,753 psi | 89% | 2556 fps | 100% |
| IMR 4350 | <<locked>> | 90% | 56,188 psi | 88% | 2592 fps | 99.9% |
| IMR 4451 Enduron | <<locked>> | 86% | 56,579 psi | 89% | 2585 fps | 99.9% |
| IMR 4831 | <<locked>> | 90% | 56,014 psi | 88% | 2598 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 55,477 psi | 87% | 2592 fps | 98.4% |
| IMR 7828 SSC | <<locked>> | 98% | 55,347 psi | 87% | 2690 fps | 98.9% |
| Lovex S062 | <<locked>> | 82% | 57,058 psi | 89% | 2546 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 56,927 psi | 89% | 2579 fps | 100% |
| Lovex S070 | <<locked>> | 88% | 55,027 psi | 86% | 2575 fps | 100% |
| Lovex S071ᴾ | <<locked>> | 100% | 51,387 psi | 81% | 2539 fps | 100% |
| Norma 204 | <<locked>> | 90% | 57,261 psi | 90% | 2648 fps | 99.5% |
| Norma 217ᴾ | <<locked>> | 100% | 35,447 psi | 56% | 2402 fps | 96.8% |
| Norma MRP | <<locked>> | 96% | 57,319 psi | 90% | 2730 fps | 100% |
| Norma URP | <<locked>> | 90% | 57,609 psi | 90% | 2638 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 56,014 psi | 88% | 2707 fps | 99.3% |
| Ramshot Hunter | <<locked>> | 90% | 56,507 psi | 89% | 2648 fps | 100% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 53,983 psi | 85% | 2644 fps | 99.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,637 psi | 59% | 1647 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 55,680 psi | 87% | 2569 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 57,203 psi | 90% | 2661 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 55,506 psi | 87% | 2628 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 53,751 psi | 84% | 2654 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 49,690 psi | 78% | 2687 fps | 100% |
| Rottweil R 903 | <<locked>> | 84% | 56,173 psi | 88% | 2562 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 54,143 psi | 85% | 2579 fps | 98.6% |
| Rottweil R 905 | <<locked>> | 94% | 55,172 psi | 86% | 2635 fps | 99.5% |
| Rottweil R 907 | <<locked>> | 86% | 54,998 psi | 86% | 2562 fps | 99.8% |
| Shooters World Long Rifle | <<locked>> | 88% | 56,927 psi | 89% | 2579 fps | 100% |
| Shooters World Precision | <<locked>> | 82% | 57,058 psi | 89% | 2546 fps | 100% |
| Shooters World SW4350 | <<locked>> | 88% | 55,027 psi | 86% | 2575 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 57,522 psi | 90% | 2615 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 56,275 psi | 88% | 2444 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 56,246 psi | 88% | 2536 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 54,723 psi | 86% | 2631 fps | 99.5% |
| Somchem S355 | <<locked>> | 84% | 55,811 psi | 87% | 2556 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 55,695 psi | 87% | 2572 fps | 98.2% |
| Somchem S365 | <<locked>> | 90% | 53,969 psi | 85% | 2592 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 55,898 psi | 88% | 2612 fps | 99.9% |
| Vihtavuori N150 | <<locked>> | 86% | 57,043 psi | 89% | 2530 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 56,057 psi | 88% | 2585 fps | 100% |
| Vihtavuori N165 | <<locked>> | 98% | 55,085 psi | 86% | 2589 fps | 99.7% |
| Vihtavuori N550 | <<locked>> | 88% | 55,187 psi | 86% | 2592 fps | 100% |
| Vihtavuori N555 | <<locked>> | 96% | 57,000 psi | 89% | 2654 fps | 100% |
| Vihtavuori N560 | <<locked>> | 96% | 57,232 psi | 90% | 2726 fps | 98.8% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 52,794 psi | 83% | 2648 fps | 98.4% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 55,550 psi | 87% | 2549 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 57,682 psi | 90% | 2661 fps | 100% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 55,013 psi | 86% | 2753 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 55,767 psi | 87% | 2608 fps | 99.5% |
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% | 31,357 psi | 49% | 2188 fps | 96.6% |
| Accurate 4350 | <<locked>> | 80% | 42,293 psi | 66% | 2415 fps | 99.9% |
| Accurate High Country | 73.2 gr | 84% | 38,885 psi | 61% | 2434 fps | 95.4% |
| Accurate MAGPRO | <<locked>> | 88% | 42,206 psi | 66% | 2487 fps | 95% |
| ADI AR 2208 | <<locked>> | 80% | 50,531 psi | 79% | 2484 fps | 100% |
| ADI AR 2209 | <<locked>> | 80% | 35,462 psi | 56% | 2297 fps | 95.1% |
| ADI AR 2213 | <<locked>> | 88% | 41,336 psi | 65% | 2444 fps | 95.7% |
| ADI AR 2217 | <<locked>> | 96% | 39,537 psi | 62% | 2402 fps | 95.3% |
| ADI AR 2225 | <<locked>> | 92% | 30,980 psi | 49% | 2257 fps | 95% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 35,752 psi | 56% | 2303 fps | 95.3% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 35,752 psi | 56% | 2303 fps | 95.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 51,590 psi | 81% | 2503 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 40,727 psi | 64% | 2421 fps | 99.9% |
| Alliant Reloder-17 | <<locked>> | 80% | 46,717 psi | 73% | 2526 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 35,433 psi | 56% | 2297 fps | 95.2% |
| Alliant Reloder-22 | <<locked>> | 84% | 35,824 psi | 56% | 2346 fps | 95.6% |
| Alliant Reloder-23 | <<locked>> | 80% | 30,211 psi | 47% | 2218 fps | 99.3% |
| Alliant Reloder-25 | <<locked>> | 82% | 28,181 psi | 44% | 2178 fps | 95.7% |
| Alliant Reloder-26 | 71.8 gr | 80% | 32,518 psi | 51% | 2329 fps | 98.5% |
| Baschieri & Pellagri 109 | <<locked>> | 96% | 52,881 psi | 83% | 2572 fps | 95.6% |
| Bofors RP15 | <<locked>> | 86% | 35,534 psi | 56% | 2336 fps | 95.3% |
| Bofors RP3 | <<locked>> | 80% | 52,286 psi | 82% | 2516 fps | 100% |
| Bofors RP30 | <<locked>> | 94% | 37,840 psi | 59% | 2418 fps | 95.5% |
| Bofors RP5 | <<locked>> | 84% | 35,824 psi | 56% | 2346 fps | 95.6% |
| Bofors RP7 | <<locked>> | 80% | 45,629 psi | 72% | 2421 fps | 98.8% |
| Hodgdon H1000 | <<locked>> | 92% | 37,942 psi | 59% | 2372 fps | 95.4% |
| Hodgdon H380 | <<locked>> | 80% | 52,547 psi | 82% | 2536 fps | 100% |
| Hodgdon H414 | <<locked>> | 80% | 43,976 psi | 69% | 2457 fps | 99% |
| Hodgdon H4350 | <<locked>> | 80% | 46,731 psi | 73% | 2470 fps | 98.5% |
| Hodgdon H4831 | <<locked>> | 86% | 41,336 psi | 65% | 2395 fps | 95% |
| Hodgdon H4831 SC | <<locked>> | 88% | 43,352 psi | 68% | 2434 fps | 95.7% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 38,276 psi | 60% | 2320 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 90% | 35,636 psi | 56% | 2408 fps | 96% |
| Hodgdon Superformance | <<locked>> | 80% | 43,221 psi | 68% | 2477 fps | 98.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,557 psi | 43% | 1437 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 53,185 psi | 83% | 2510 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 41,017 psi | 64% | 2356 fps | 98% |
| IMR 4451 Enduron | <<locked>> | 80% | 46,934 psi | 74% | 2441 fps | 99.2% |
| IMR 4831 | <<locked>> | 80% | 40,466 psi | 63% | 2369 fps | 99.8% |
| IMR 4955 Enduron | <<locked>> | 84% | 40,553 psi | 64% | 2349 fps | 95% |
| IMR 7828 SSC | <<locked>> | 88% | 39,581 psi | 62% | 2421 fps | 95.2% |
| Lovex S062 | <<locked>> | 80% | 53,664 psi | 84% | 2503 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 44,585 psi | 70% | 2398 fps | 99.6% |
| Lovex S070 | <<locked>> | 80% | 42,844 psi | 67% | 2388 fps | 98.9% |
| Lovex S071 | <<locked>> | 82% | 28,906 psi | 45% | 2126 fps | 95.5% |
| Norma 204 | <<locked>> | 80% | 40,843 psi | 64% | 2388 fps | 96.8% |
| Norma 217 | <<locked>> | 98% | 33,272 psi | 52% | 2352 fps | 95.9% |
| Norma MRP | 69.7 gr | 80% | 32,605 psi | 51% | 2297 fps | 95.8% |
| Norma URP | <<locked>> | 80% | 41,727 psi | 65% | 2405 fps | 99.8% |
| Ramshot Grand | <<locked>> | 88% | 39,131 psi | 61% | 2425 fps | 95.5% |
| Ramshot Hunter | <<locked>> | 80% | 40,567 psi | 64% | 2398 fps | 99% |
| Ramshot Magnum | <<locked>> | 88% | 34,911 psi | 55% | 2320 fps | 96.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,079 psi | 44% | 1473 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 52,257 psi | 82% | 2523 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 49,574 psi | 78% | 2566 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 42,134 psi | 66% | 2431 fps | 99.8% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 40,567 psi | 64% | 2448 fps | 99.7% |
| ReloadSwiss RS 76 | <<locked>> | 88% | 32,503 psi | 51% | 2329 fps | 95.8% |
| Rottweil R 903 | <<locked>> | 80% | 49,356 psi | 77% | 2474 fps | 100% |
| Rottweil R 904 | <<locked>> | 82% | 39,363 psi | 62% | 2333 fps | 95.2% |
| Rottweil R 905 | <<locked>> | 80% | 34,635 psi | 54% | 2280 fps | 95.1% |
| Rottweil R 907 | <<locked>> | 80% | 45,629 psi | 72% | 2421 fps | 98.8% |
| Shooters World Long Rifle | <<locked>> | 80% | 44,585 psi | 70% | 2398 fps | 99.6% |
| Shooters World Precision | <<locked>> | 80% | 53,664 psi | 84% | 2503 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 42,844 psi | 67% | 2388 fps | 98.9% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 50,560 psi | 79% | 2523 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 49,893 psi | 78% | 2369 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 43,627 psi | 68% | 2352 fps | 98.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 34,316 psi | 54% | 2277 fps | 95% |
| Somchem S355 | <<locked>> | 80% | 49,400 psi | 77% | 2470 fps | 100% |
| Somchem S361 | <<locked>> | 84% | 42,801 psi | 67% | 2372 fps | 95.4% |
| Somchem S365 | <<locked>> | 80% | 38,406 psi | 60% | 2365 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 35,230 psi | 55% | 2267 fps | 96.3% |
| Vihtavuori N150 | <<locked>> | 80% | 47,195 psi | 74% | 2402 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 43,149 psi | 68% | 2398 fps | 99.9% |
| Vihtavuori N165 | <<locked>> | 84% | 34,708 psi | 54% | 2251 fps | 95.7% |
| Vihtavuori N550 | <<locked>> | 80% | 42,598 psi | 67% | 2405 fps | 99.8% |
| Vihtavuori N555 | <<locked>> | 80% | 33,736 psi | 53% | 2283 fps | 99.2% |
| Vihtavuori N560 | <<locked>> | 86% | 40,466 psi | 63% | 2451 fps | 95.1% |
| Vihtavuori N565 | <<locked>> | 92% | 40,147 psi | 63% | 2438 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 42,134 psi | 66% | 2365 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 44,164 psi | 69% | 2461 fps | 99% |
| Winchester StaBALL HD | <<locked>> | 80% | 26,745 psi | 42% | 2221 fps | 99.3% |
| Winchester Supreme 780 | <<locked>> | 84% | 36,767 psi | 58% | 2300 fps | 95.7% |
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 84 powders for .338 Rem. Ultra Mag. loaded with the .338 | 250gr | Nosler Expansion Tip. Winchester StaBALL HD delivers the highest muzzle velocity at 2,753 fps; across all powders the maximum-charge window runs from 1,608 fps to 2,753 fps. ADI AR 2217 gives the best case fill at 100 %, and 84 of the 84 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 56–90 %, leaving at least 10 % headroom. The 250.0 gr projectile in 0.338" calls for a 1:11.0 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. Accurate High Country, Alliant Reloder-26, Norma MRP rank at the top here: for .338 Rem. Ultra Mag. with the .338 | 250gr | Nosler Expansion Tip 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.