Load Specifications
Load data in caliber .338 Rem. Ultra Mag. with .338 | 230gr | Lehigh Defense Match Solid bullet and 91 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-26, Norma MRP 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.
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 2495 | <<locked>> | 82% | 56,478 psi | 89% | 2589 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 55,883 psi | 88% | 2631 fps | 99.4% |
| Accurate 3100ᴾ | <<locked>> | 100% | 56,536 psi | 89% | 2713 fps | 100% |
| Accurate 4064 | <<locked>> | 84% | 56,913 psi | 89% | 2644 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 54,824 psi | 86% | 2707 fps | 100% |
| Accurate MAGPROᴾ | <<locked>> | 100% | 56,188 psi | 88% | 2805 fps | 96.8% |
| ADI AR 2208 | <<locked>> | 86% | 57,450 psi | 90% | 2684 fps | 100% |
| ADI AR 2209 | <<locked>> | 96% | 55,999 psi | 88% | 2756 fps | 99.1% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 57,609 psi | 90% | 2812 fps | 98.5% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 36,608 psi | 57% | 2484 fps | 96.7% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 57,188 psi | 90% | 2802 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 54,636 psi | 86% | 2654 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 54,824 psi | 86% | 2677 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 92% | 55,709 psi | 87% | 2762 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 88% | 57,203 psi | 90% | 2782 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 96% | 55,259 psi | 87% | 2743 fps | 99% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 56,681 psi | 89% | 2805 fps | 99.3% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 53,490 psi | 84% | 2730 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 46,282 psi | 73% | 2674 fps | 99.9% |
| Alliant Reloder-26 | <<locked>> | 96% | 53,519 psi | 84% | 2808 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 51,692 psi | 81% | 2730 fps | 98.6% |
| Bofors RP3 | <<locked>> | 84% | 55,521 psi | 87% | 2671 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 56,681 psi | 89% | 2805 fps | 99.3% |
| Bofors RP7 | <<locked>> | 88% | 54,868 psi | 86% | 2664 fps | 99.4% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 45,934 psi | 72% | 2615 fps | 97% |
| Hodgdon H380 | <<locked>> | 84% | 55,753 psi | 87% | 2690 fps | 100% |
| Hodgdon H414 | <<locked>> | 90% | 57,203 psi | 90% | 2762 fps | 99.9% |
| Hodgdon H4350 | <<locked>> | 88% | 56,652 psi | 89% | 2723 fps | 99.3% |
| Hodgdon H4831 | <<locked>> | 98% | 57,682 psi | 90% | 2756 fps | 97.9% |
| Hodgdon H4831 SC | <<locked>> | 98% | 56,275 psi | 88% | 2736 fps | 97.7% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 56,159 psi | 88% | 2687 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 57,348 psi | 90% | 2720 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 45,266 psi | 71% | 2710 fps | 98.3% |
| Hodgdon Superformance | <<locked>> | 88% | 53,650 psi | 84% | 2743 fps | 99.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,405 psi | 57% | 1677 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 56,710 psi | 89% | 2664 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 55,767 psi | 87% | 2654 fps | 99.7% |
| IMR 4350 | <<locked>> | 92% | 56,043 psi | 88% | 2697 fps | 99.6% |
| IMR 4451 Enduron | <<locked>> | 88% | 56,623 psi | 89% | 2690 fps | 99.8% |
| IMR 4831 | <<locked>> | 92% | 55,376 psi | 87% | 2700 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 56,260 psi | 88% | 2703 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 55,274 psi | 87% | 2690 fps | 97.7% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 54,781 psi | 86% | 2782 fps | 98.2% |
| Lovex S062 | <<locked>> | 84% | 56,956 psi | 89% | 2657 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 56,637 psi | 89% | 2680 fps | 100% |
| Lovex S070 | <<locked>> | 90% | 54,476 psi | 85% | 2674 fps | 99.7% |
| Lovex S071ᴾ | <<locked>> | 100% | 46,775 psi | 73% | 2575 fps | 99.4% |
| Norma 203B | <<locked>> | 84% | 57,740 psi | 90% | 2710 fps | 100% |
| Norma 204 | <<locked>> | 92% | 57,159 psi | 90% | 2749 fps | 99.1% |
| Norma MRP | <<locked>> | 98% | 56,246 psi | 88% | 2825 fps | 99.9% |
| Norma URP | <<locked>> | 92% | 57,145 psi | 90% | 2743 fps | 100% |
| Ramshot Big Game | <<locked>> | 82% | 54,998 psi | 86% | 2687 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 55,477 psi | 87% | 2802 fps | 98.6% |
| Ramshot Hunter | <<locked>> | 92% | 56,086 psi | 88% | 2749 fps | 100% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 49,356 psi | 77% | 2677 fps | 98.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,144 psi | 58% | 1716 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 55,869 psi | 88% | 2677 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 56,565 psi | 89% | 2769 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 54,795 psi | 86% | 2730 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 57,203 psi | 90% | 2812 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 45,397 psi | 71% | 2707 fps | 99.2% |
| Rottweil R 902 | <<locked>> | 82% | 55,201 psi | 87% | 2621 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 55,608 psi | 87% | 2667 fps | 100% |
| Rottweil R 904 | <<locked>> | 96% | 57,609 psi | 90% | 2726 fps | 98.5% |
| Rottweil R 905 | <<locked>> | 96% | 54,505 psi | 85% | 2730 fps | 99% |
| Rottweil R 907 | <<locked>> | 88% | 54,868 psi | 86% | 2664 fps | 99.4% |
| Shooters World Long Rifle | <<locked>> | 90% | 56,637 psi | 89% | 2680 fps | 100% |
| Shooters World Precision | <<locked>> | 84% | 56,956 psi | 89% | 2657 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 54,476 psi | 85% | 2674 fps | 99.7% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 57,566 psi | 90% | 2726 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 56,420 psi | 88% | 2556 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 56,275 psi | 88% | 2641 fps | 99.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 54,041 psi | 85% | 2726 fps | 99% |
| Somchem S355 | <<locked>> | 86% | 55,492 psi | 87% | 2664 fps | 100% |
| Somchem S361 | <<locked>> | 94% | 55,608 psi | 87% | 2667 fps | 97.5% |
| Somchem S365 | <<locked>> | 94% | 56,840 psi | 89% | 2740 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 55,071 psi | 86% | 2707 fps | 99.5% |
| Vihtavuori N135 | <<locked>> | 82% | 55,709 psi | 87% | 2579 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 55,941 psi | 88% | 2595 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 57,029 psi | 89% | 2638 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 55,724 psi | 87% | 2690 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 54,505 psi | 85% | 2684 fps | 99.3% |
| Vihtavuori N540 | <<locked>> | 84% | 57,725 psi | 90% | 2638 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 54,679 psi | 86% | 2694 fps | 100% |
| Vihtavuori N555 | <<locked>> | 98% | 55,782 psi | 87% | 2753 fps | 100% |
| Vihtavuori N560 | <<locked>> | 98% | 56,376 psi | 88% | 2818 fps | 98.1% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 48,051 psi | 75% | 2674 fps | 96.7% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 55,477 psi | 87% | 2654 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 57,203 psi | 90% | 2762 fps | 99.9% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 49,284 psi | 77% | 2795 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 55,317 psi | 87% | 2700 fps | 99% |
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 2495 | <<locked>> | 80% | 52,750 psi | 83% | 2546 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 45,745 psi | 72% | 2480 fps | 98% |
| Accurate 3100 | <<locked>> | 82% | 30,095 psi | 47% | 2247 fps | 95% |
| Accurate 4064 | <<locked>> | 80% | 50,067 psi | 78% | 2556 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 38,464 psi | 60% | 2448 fps | 99.2% |
| Accurate MAGPRO | <<locked>> | 96% | 48,573 psi | 76% | 2687 fps | 95% |
| ADI AR 2208 | <<locked>> | 80% | 47,500 psi | 74% | 2543 fps | 100% |
| ADI AR 2209 | <<locked>> | 86% | 40,074 psi | 63% | 2487 fps | 95.7% |
| ADI AR 2213 | <<locked>> | 92% | 43,685 psi | 68% | 2582 fps | 95.4% |
| ADI AR 2225 | <<locked>> | 98% | 34,301 psi | 54% | 2425 fps | 95.5% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 53,171 psi | 83% | 2746 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 48,066 psi | 75% | 2562 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 51,372 psi | 81% | 2628 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 37,449 psi | 59% | 2457 fps | 99.3% |
| Alliant Reloder-17 | <<locked>> | 80% | 42,830 psi | 67% | 2572 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 39,827 psi | 62% | 2484 fps | 95.8% |
| Alliant Reloder-22 | <<locked>> | 88% | 37,463 psi | 59% | 2474 fps | 95.1% |
| Alliant Reloder-23 | <<locked>> | 80% | 27,282 psi | 43% | 2228 fps | 97.5% |
| Alliant Reloder-25 | <<locked>> | 86% | 29,211 psi | 46% | 2290 fps | 95% |
| Alliant Reloder-26 | 72.8 gr | 80% | 29,283 psi | 46% | 2333 fps | 96.1% |
| Bofors RP15 | <<locked>> | 92% | 39,581 psi | 62% | 2516 fps | 95.7% |
| Bofors RP3 | <<locked>> | 80% | 48,341 psi | 76% | 2572 fps | 100% |
| Bofors RP5 | <<locked>> | 88% | 37,463 psi | 59% | 2474 fps | 95.1% |
| Bofors RP7 | <<locked>> | 80% | 42,525 psi | 67% | 2464 fps | 97.5% |
| Hodgdon H1000 | <<locked>> | 98% | 42,873 psi | 67% | 2559 fps | 96.1% |
| Hodgdon H380 | <<locked>> | 80% | 48,849 psi | 77% | 2589 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 80% | 40,669 psi | 64% | 2493 fps | 97.6% |
| Hodgdon H4350 | <<locked>> | 80% | 43,497 psi | 68% | 2513 fps | 97.1% |
| Hodgdon H4831 | <<locked>> | 92% | 46,775 psi | 73% | 2589 fps | 95.6% |
| Hodgdon H4831 SC | <<locked>> | 92% | 45,847 psi | 72% | 2572 fps | 95.4% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 35,027 psi | 55% | 2356 fps | 99.6% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 53,505 psi | 84% | 2671 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 94% | 37,057 psi | 58% | 2530 fps | 95.4% |
| Hodgdon Superformance | <<locked>> | 80% | 39,682 psi | 62% | 2507 fps | 97.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,151 psi | 43% | 1499 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 49,922 psi | 78% | 2572 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 52,301 psi | 82% | 2605 fps | 99.4% |
| IMR 4350 | <<locked>> | 80% | 38,087 psi | 60% | 2395 fps | 96.3% |
| IMR 4451 Enduron | <<locked>> | 80% | 43,990 psi | 69% | 2490 fps | 98.2% |
| IMR 4831 | <<locked>> | 80% | 37,057 psi | 58% | 2405 fps | 99% |
| IMR 4895 | <<locked>> | 80% | 52,707 psi | 83% | 2654 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 90% | 45,730 psi | 72% | 2536 fps | 95.5% |
| IMR 7828 SSC | <<locked>> | 94% | 44,585 psi | 70% | 2612 fps | 95.8% |
| Lovex S062 | <<locked>> | 80% | 50,198 psi | 79% | 2569 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 41,292 psi | 65% | 2441 fps | 98.7% |
| Lovex S070 | <<locked>> | 80% | 39,595 psi | 62% | 2428 fps | 97.5% |
| Lovex S071 | <<locked>> | 88% | 31,386 psi | 49% | 2280 fps | 95.6% |
| Norma 203B | <<locked>> | 80% | 50,691 psi | 79% | 2615 fps | 100% |
| Norma 204 | <<locked>> | 82% | 40,437 psi | 63% | 2474 fps | 95.7% |
| Norma MRP | 74.2 gr | 84% | 34,113 psi | 53% | 2425 fps | 95.4% |
| Norma URP | <<locked>> | 80% | 38,377 psi | 60% | 2444 fps | 99.1% |
| Ramshot Big Game | <<locked>> | 80% | 51,329 psi | 80% | 2638 fps | 100% |
| Ramshot Grand | <<locked>> | 92% | 41,365 psi | 65% | 2559 fps | 95.2% |
| Ramshot Hunter | <<locked>> | 80% | 37,217 psi | 58% | 2431 fps | 97.5% |
| Ramshot Magnum | <<locked>> | 92% | 36,651 psi | 57% | 2444 fps | 95.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,731 psi | 43% | 1535 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 48,762 psi | 76% | 2572 fps | 99.4% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 45,556 psi | 71% | 2618 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 38,348 psi | 60% | 2464 fps | 99% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 37,217 psi | 58% | 2474 fps | 98.6% |
| ReloadSwiss RS 76 | <<locked>> | 92% | 33,953 psi | 53% | 2448 fps | 95.2% |
| Rottweil R 902 | <<locked>> | 80% | 51,924 psi | 81% | 2575 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 45,614 psi | 71% | 2526 fps | 100% |
| Rottweil R 904 | <<locked>> | 86% | 41,655 psi | 65% | 2470 fps | 95% |
| Rottweil R 905 | <<locked>> | 86% | 38,769 psi | 61% | 2464 fps | 95.6% |
| Rottweil R 907 | <<locked>> | 80% | 42,525 psi | 67% | 2464 fps | 97.5% |
| Shooters World Long Rifle | <<locked>> | 80% | 41,292 psi | 65% | 2441 fps | 98.7% |
| Shooters World Precision | <<locked>> | 80% | 50,198 psi | 79% | 2569 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 39,595 psi | 62% | 2428 fps | 97.5% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 46,934 psi | 74% | 2579 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 46,731 psi | 73% | 2431 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 40,538 psi | 64% | 2392 fps | 97.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 38,421 psi | 60% | 2457 fps | 95.5% |
| Somchem S355 | <<locked>> | 80% | 45,730 psi | 72% | 2523 fps | 100% |
| Somchem S361 | <<locked>> | 88% | 45,368 psi | 71% | 2510 fps | 95.2% |
| Somchem S365 | <<locked>> | 80% | 34,751 psi | 54% | 2402 fps | 100% |
| Somchem S385 | <<locked>> | 82% | 34,461 psi | 54% | 2343 fps | 95% |
| Vihtavuori N135 | <<locked>> | 80% | 52,257 psi | 82% | 2536 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 52,591 psi | 82% | 2552 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 43,845 psi | 69% | 2457 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 39,755 psi | 62% | 2441 fps | 99.3% |
| Vihtavuori N165 | <<locked>> | 88% | 36,361 psi | 57% | 2375 fps | 95.3% |
| Vihtavuori N540 | <<locked>> | 80% | 50,807 psi | 80% | 2549 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 39,204 psi | 61% | 2444 fps | 99.1% |
| Vihtavuori N555 | <<locked>> | 80% | 30,269 psi | 47% | 2300 fps | 97.6% |
| Vihtavuori N560 | 81.2 gr | 92% | 45,643 psi | 72% | 2644 fps | 95.7% |
| Vihtavuori N565 | <<locked>> | 98% | 44,860 psi | 70% | 2618 fps | 95.8% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 39,015 psi | 61% | 2411 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 40,669 psi | 64% | 2493 fps | 97.6% |
| Winchester StaBALL HD | <<locked>> | 80% | 24,004 psi | 38% | 2201 fps | 96.5% |
| Winchester Supreme 780 | <<locked>> | 88% | 38,827 psi | 61% | 2434 fps | 95.4% |
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 91 powders for .338 Rem. Ultra Mag. loaded with the .338 | 230gr | Lehigh Defense Match Solid. Norma MRP delivers the highest muzzle velocity at 2,825 fps; across all powders the maximum-charge window runs from 1,677 fps to 2,825 fps. Accurate 3100 gives the best case fill at 100 %, and 91 of the 91 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 57–90 %, leaving at least 10 % headroom. The 230.0 gr projectile in 0.338" calls for a 1:11.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, Accurate MAGPRO, ADI AR 2213 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. Alliant Reloder-26, Norma MRP, Vihtavuori N560 rank at the top here: for .338 Rem. Ultra Mag. with the .338 | 230gr | Lehigh Defense Match Solid 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.