Load Specifications
Load data in caliber .338 Rem. Ultra Mag. with .338 | 230gr | Hornady ELD-X bullet and 88 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Vihtavuori N560, Accurate MAGPRO and Accurate High Country.
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 2700 | <<locked>> | 82% | 56,768 psi | 89% | 2657 fps | 99.6% |
| Accurate 3100 | <<locked>> | 98% | 56,202 psi | 88% | 2710 fps | 100% |
| Accurate 4064 | <<locked>> | 82% | 56,478 psi | 89% | 2638 fps | 100% |
| Accurate 4350 | <<locked>> | 88% | 54,186 psi | 85% | 2700 fps | 100% |
| Accurate High Country | <<locked>> | 96% | 57,421 psi | 90% | 2851 fps | 98.9% |
| Accurate MAGPRO | <<locked>> | 96% | 54,592 psi | 86% | 2795 fps | 97.4% |
| ADI AR 2208 | <<locked>> | 84% | 56,159 psi | 88% | 2671 fps | 100% |
| ADI AR 2209 | <<locked>> | 94% | 54,897 psi | 86% | 2743 fps | 99.1% |
| ADI AR 2213 | <<locked>> | 98% | 56,405 psi | 88% | 2799 fps | 98.5% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 39,001 psi | 61% | 2543 fps | 97.8% |
| Alliant Power Pro Varmint | <<locked>> | 94% | 55,201 psi | 87% | 2743 fps | 99.1% |
| Alliant Power Pro Varmint | <<locked>> | 94% | 55,129 psi | 86% | 2743 fps | 99.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 57,145 psi | 90% | 2690 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 57,348 psi | 90% | 2713 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 90% | 54,940 psi | 86% | 2753 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 86% | 56,217 psi | 88% | 2769 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 54,520 psi | 85% | 2736 fps | 99.1% |
| Alliant Reloder-22 | <<locked>> | 98% | 55,898 psi | 88% | 2795 fps | 99.3% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 56,637 psi | 89% | 2769 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 48,965 psi | 77% | 2717 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 96% | 57,334 psi | 90% | 2858 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 54,650 psi | 86% | 2776 fps | 99.1% |
| Bofors RP3 | <<locked>> | 82% | 54,491 psi | 85% | 2657 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 44,918 psi | 70% | 2648 fps | 96.9% |
| Bofors RP5 | <<locked>> | 98% | 55,898 psi | 88% | 2795 fps | 99.3% |
| Bofors RP7 | <<locked>> | 88% | 57,377 psi | 90% | 2703 fps | 99.7% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 48,356 psi | 76% | 2661 fps | 97.8% |
| Hodgdon H380 | <<locked>> | 82% | 54,737 psi | 86% | 2677 fps | 100% |
| Hodgdon H414 | <<locked>> | 88% | 56,130 psi | 88% | 2749 fps | 99.9% |
| Hodgdon H4350 | <<locked>> | 86% | 55,564 psi | 87% | 2710 fps | 99.3% |
| Hodgdon H4831 | <<locked>> | 96% | 56,536 psi | 89% | 2743 fps | 97.9% |
| Hodgdon H4831 SC | <<locked>> | 96% | 55,274 psi | 87% | 2726 fps | 97.7% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 55,172 psi | 86% | 2677 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 48,037 psi | 75% | 2766 fps | 99.1% |
| Hodgdon Superformance | <<locked>> | 88% | 56,608 psi | 89% | 2785 fps | 99.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,637 psi | 57% | 1686 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 55,535 psi | 87% | 2654 fps | 100% |
| IMR 4350 | <<locked>> | 90% | 55,085 psi | 86% | 2687 fps | 99.6% |
| IMR 4451 Enduron | <<locked>> | 86% | 55,274 psi | 87% | 2674 fps | 99.7% |
| IMR 4831 | <<locked>> | 90% | 54,563 psi | 86% | 2694 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 54,172 psi | 85% | 2677 fps | 97.6% |
| IMR 7828 SSC | <<locked>> | 98% | 53,867 psi | 84% | 2772 fps | 98.2% |
| Lovex S062 | <<locked>> | 82% | 55,796 psi | 87% | 2644 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 55,680 psi | 87% | 2674 fps | 100% |
| Lovex S070 | <<locked>> | 90% | 57,305 psi | 90% | 2717 fps | 99.9% |
| Lovex S071ᴾ | <<locked>> | 100% | 50,009 psi | 78% | 2625 fps | 99.8% |
| Norma 203B | <<locked>> | 82% | 56,695 psi | 89% | 2700 fps | 100% |
| Norma 204 | <<locked>> | 90% | 56,043 psi | 88% | 2740 fps | 99.1% |
| Norma MRP | <<locked>> | 96% | 55,535 psi | 87% | 2815 fps | 99.9% |
| Norma URP | <<locked>> | 90% | 56,376 psi | 88% | 2736 fps | 100% |
| Ramshot Big Game | <<locked>> | 82% | 57,609 psi | 90% | 2723 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 54,447 psi | 85% | 2789 fps | 98.6% |
| Ramshot Hunter | <<locked>> | 90% | 55,259 psi | 87% | 2740 fps | 100% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 52,533 psi | 82% | 2730 fps | 99.4% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,434 psi | 59% | 1729 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 54,505 psi | 85% | 2661 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 55,637 psi | 87% | 2759 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 53,983 psi | 85% | 2720 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 56,159 psi | 88% | 2799 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 48,312 psi | 76% | 2762 fps | 99.7% |
| Rottweil R 902 | <<locked>> | 82% | 57,682 psi | 90% | 2654 fps | 100% |
| Rottweil R 903 | <<locked>> | 84% | 54,766 psi | 86% | 2657 fps | 100% |
| Rottweil R 904 | <<locked>> | 94% | 56,405 psi | 88% | 2717 fps | 98.4% |
| Rottweil R 905 | <<locked>> | 96% | 57,522 psi | 90% | 2776 fps | 99.4% |
| Rottweil R 907 | <<locked>> | 88% | 57,377 psi | 90% | 2703 fps | 99.7% |
| Shooters World Long Rifle | <<locked>> | 88% | 55,680 psi | 87% | 2674 fps | 100% |
| Shooters World Precision | <<locked>> | 82% | 55,796 psi | 87% | 2644 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 57,305 psi | 90% | 2717 fps | 99.9% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 56,333 psi | 88% | 2713 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 55,143 psi | 86% | 2543 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 55,100 psi | 86% | 2628 fps | 99.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 57,043 psi | 89% | 2769 fps | 99.4% |
| Somchem S355 | <<locked>> | 84% | 54,592 psi | 86% | 2651 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 54,694 psi | 86% | 2657 fps | 97.5% |
| Somchem S365 | <<locked>> | 92% | 56,188 psi | 88% | 2733 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 54,476 psi | 85% | 2700 fps | 99.5% |
| Vihtavuori N150 | <<locked>> | 86% | 55,825 psi | 87% | 2625 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 54,752 psi | 86% | 2677 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 57,537 psi | 90% | 2726 fps | 99.6% |
| Vihtavuori N540 | <<locked>> | 82% | 56,550 psi | 89% | 2625 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 57,450 psi | 90% | 2733 fps | 100% |
| Vihtavuori N555 | <<locked>> | 96% | 55,492 psi | 87% | 2746 fps | 100% |
| Vihtavuori N560 | <<locked>> | 96% | 55,535 psi | 87% | 2808 fps | 98.1% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 51,416 psi | 81% | 2730 fps | 97.6% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 54,215 psi | 85% | 2641 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 56,333 psi | 88% | 2753 fps | 99.9% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 53,142 psi | 83% | 2841 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 54,389 psi | 85% | 2690 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 2700 | <<locked>> | 80% | 53,171 psi | 83% | 2608 fps | 99.2% |
| Accurate 3100 | <<locked>> | 80% | 30,356 psi | 48% | 2251 fps | 95.3% |
| Accurate 4064 | <<locked>> | 80% | 53,040 psi | 83% | 2592 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 41,075 psi | 64% | 2493 fps | 99.6% |
| Accurate High Country | 77.9 gr | 86% | 40,495 psi | 63% | 2566 fps | 95.1% |
| Accurate MAGPRO | 84.9 gr | 92% | 47,355 psi | 74% | 2680 fps | 95.7% |
| ADI AR 2208 | <<locked>> | 80% | 49,574 psi | 78% | 2575 fps | 100% |
| ADI AR 2209 | <<locked>> | 84% | 39,508 psi | 62% | 2477 fps | 95.7% |
| ADI AR 2213 | <<locked>> | 90% | 43,105 psi | 68% | 2572 fps | 95.4% |
| ADI AR 2225 | <<locked>> | 96% | 34,316 psi | 54% | 2428 fps | 95.8% |
| Alliant Power Pro Varmint | <<locked>> | 82% | 37,260 psi | 58% | 2428 fps | 95% |
| Alliant Power Pro Varmint | <<locked>> | 82% | 37,217 psi | 58% | 2428 fps | 95% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 50,415 psi | 79% | 2598 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 53,708 psi | 84% | 2664 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 39,581 psi | 62% | 2503 fps | 99.7% |
| Alliant Reloder-17 | <<locked>> | 80% | 45,324 psi | 71% | 2612 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 84% | 39,363 psi | 62% | 2474 fps | 95.8% |
| Alliant Reloder-22 | <<locked>> | 86% | 37,333 psi | 59% | 2470 fps | 95.3% |
| Alliant Reloder-23 | <<locked>> | 80% | 29,254 psi | 46% | 2283 fps | 98.5% |
| Alliant Reloder-25 | <<locked>> | 84% | 29,225 psi | 46% | 2290 fps | 95.2% |
| Alliant Reloder-26 | <<locked>> | 80% | 31,488 psi | 49% | 2392 fps | 97.3% |
| Bofors RP15 | <<locked>> | 90% | 39,465 psi | 62% | 2513 fps | 95.9% |
| Bofors RP3 | <<locked>> | 80% | 51,126 psi | 80% | 2612 fps | 100% |
| Bofors RP30 | <<locked>> | 96% | 39,204 psi | 61% | 2536 fps | 95.1% |
| Bofors RP5 | <<locked>> | 86% | 37,333 psi | 59% | 2470 fps | 95.3% |
| Bofors RP7 | <<locked>> | 80% | 44,672 psi | 70% | 2503 fps | 98.1% |
| Hodgdon H1000 | <<locked>> | 94% | 39,537 psi | 62% | 2493 fps | 95.1% |
| Hodgdon H380 | <<locked>> | 80% | 51,198 psi | 80% | 2625 fps | 100% |
| Hodgdon H414 | <<locked>> | 80% | 42,859 psi | 67% | 2536 fps | 98.3% |
| Hodgdon H4350 | <<locked>> | 80% | 45,716 psi | 72% | 2552 fps | 97.7% |
| Hodgdon H4831 | <<locked>> | 90% | 46,108 psi | 72% | 2579 fps | 95.7% |
| Hodgdon H4831 SC | <<locked>> | 90% | 45,208 psi | 71% | 2566 fps | 95.4% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 37,289 psi | 58% | 2402 fps | 99.9% |
| Hodgdon Retumbo | <<locked>> | 92% | 36,956 psi | 58% | 2530 fps | 95.6% |
| Hodgdon Superformance | <<locked>> | 80% | 42,018 psi | 66% | 2552 fps | 97.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,470 psi | 43% | 1512 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 52,127 psi | 82% | 2605 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 40,190 psi | 63% | 2438 fps | 97.1% |
| IMR 4451 Enduron | <<locked>> | 80% | 45,948 psi | 72% | 2526 fps | 98.7% |
| IMR 4831 | <<locked>> | 80% | 39,378 psi | 62% | 2448 fps | 99.4% |
| IMR 4955 Enduron | <<locked>> | 88% | 44,962 psi | 70% | 2526 fps | 95.5% |
| IMR 7828 SSC | <<locked>> | 92% | 44,063 psi | 69% | 2605 fps | 95.9% |
| Lovex S062 | <<locked>> | 80% | 52,417 psi | 82% | 2598 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 43,468 psi | 68% | 2480 fps | 99.2% |
| Lovex S070 | <<locked>> | 80% | 41,843 psi | 66% | 2470 fps | 98.2% |
| Lovex S071 | <<locked>> | 84% | 29,791 psi | 47% | 2238 fps | 95.1% |
| Norma 203B | <<locked>> | 80% | 53,069 psi | 83% | 2651 fps | 100% |
| Norma 204 | <<locked>> | 80% | 39,784 psi | 62% | 2464 fps | 95.7% |
| Norma MRP | <<locked>> | 82% | 33,997 psi | 53% | 2421 fps | 95.5% |
| Norma URP | <<locked>> | 80% | 40,640 psi | 64% | 2487 fps | 99.5% |
| Ramshot Big Game | <<locked>> | 80% | 53,954 psi | 85% | 2674 fps | 100% |
| Ramshot Grand | <<locked>> | 90% | 40,843 psi | 64% | 2552 fps | 95.2% |
| Ramshot Hunter | <<locked>> | 80% | 39,450 psi | 62% | 2477 fps | 98.2% |
| Ramshot Magnum | <<locked>> | 90% | 36,332 psi | 57% | 2438 fps | 95.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,949 psi | 44% | 1545 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 51,068 psi | 80% | 2612 fps | 99.7% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 48,109 psi | 75% | 2657 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 41,046 psi | 64% | 2513 fps | 99.5% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 39,494 psi | 62% | 2523 fps | 99.2% |
| ReloadSwiss RS 76 | <<locked>> | 90% | 33,939 psi | 53% | 2451 fps | 95.5% |
| Rottweil R 902 | <<locked>> | 80% | 54,172 psi | 85% | 2608 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 48,153 psi | 75% | 2562 fps | 100% |
| Rottweil R 904 | <<locked>> | 84% | 41,046 psi | 64% | 2461 fps | 95% |
| Rottweil R 905 | <<locked>> | 84% | 38,624 psi | 61% | 2461 fps | 95.8% |
| Rottweil R 907 | <<locked>> | 80% | 44,672 psi | 70% | 2503 fps | 98.1% |
| Shooters World Long Rifle | <<locked>> | 80% | 43,468 psi | 68% | 2480 fps | 99.2% |
| Shooters World Precision | <<locked>> | 80% | 52,417 psi | 82% | 2598 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 41,843 psi | 66% | 2470 fps | 98.2% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 49,342 psi | 77% | 2615 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 48,878 psi | 77% | 2461 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 42,612 psi | 67% | 2431 fps | 98.2% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 38,276 psi | 60% | 2454 fps | 95.6% |
| Somchem S355 | <<locked>> | 80% | 48,153 psi | 75% | 2559 fps | 100% |
| Somchem S361 | <<locked>> | 86% | 44,715 psi | 70% | 2500 fps | 95.2% |
| Somchem S365 | <<locked>> | 80% | 37,318 psi | 58% | 2448 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 34,330 psi | 54% | 2339 fps | 95.1% |
| Vihtavuori N150 | <<locked>> | 80% | 46,108 psi | 72% | 2493 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 41,974 psi | 66% | 2484 fps | 99.6% |
| Vihtavuori N165 | <<locked>> | 86% | 36,085 psi | 57% | 2372 fps | 95.4% |
| Vihtavuori N540 | <<locked>> | 80% | 52,997 psi | 83% | 2579 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 41,394 psi | 65% | 2484 fps | 99.5% |
| Vihtavuori N555 | <<locked>> | 80% | 32,706 psi | 51% | 2356 fps | 98.5% |
| Vihtavuori N560 | 81.5 gr | 90% | 45,208 psi | 71% | 2638 fps | 95.8% |
| Vihtavuori N565 | <<locked>> | 94% | 41,727 psi | 65% | 2559 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 41,031 psi | 64% | 2448 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 43,033 psi | 67% | 2539 fps | 98.3% |
| Winchester StaBALL HD | <<locked>> | 80% | 25,947 psi | 41% | 2274 fps | 98.1% |
| Winchester Supreme 780 | <<locked>> | 86% | 38,334 psi | 60% | 2425 fps | 95.5% |
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 88 powders for .338 Rem. Ultra Mag. loaded with the .338 | 230gr | Hornady ELD-X. Alliant Reloder-26 delivers the highest muzzle velocity at 2,858 fps; across all powders the maximum-charge window runs from 1,686 fps to 2,858 fps. ADI AR 2225 gives the best case fill at 100 %, and 88 of the 88 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 1:13.0 twist; slower twists will usually not stabilise this weight. ADI AR 2225, Alliant Reloder-23, 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. Vihtavuori N560, Accurate MAGPRO, Accurate High Country rank at the top here: for .338 Rem. Ultra Mag. with the .338 | 230gr | Hornady ELD-X 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.