Load Specifications
Bullet:.338 | 254gr | CutEdge MTAC
Bullet Manufacturer:Cutting Edge
Bullet Weight:254 gr
Bullet Diameter:0.338"
Bullet Length:<<locked>>
Caliber:.338 Rem. Ultra Mag. load data
Case Length (l3):2.76"
Cartridge Length (C.O.L.):<<locked>>
Case Capacity:110 Grains of Water
Primer Size:Large Rifle Magnum (LRM)
Barrel Length:24"
Max. allowed Pressure:63,817 psi
Recommended Twist Rate:1:10.5
Load data in caliber .338 Rem. Ultra Mag. with .338 | 254gr | CutEdge MTAC bullet and 181 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Vihtavuori N560, Norma MRP and Accurate MAGPRO.
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% | 56,927 psi | 89% | 2536 fps | 99.8% |
| Accurate 2700 | <<locked>> | 82% | 56,608 psi | 89% | 2530 fps | 99.8% |
| Accurate 3100 | <<locked>> | 98% | 56,202 psi | 88% | 2589 fps | 100% |
| Accurate 3100 | <<locked>> | 98% | 55,724 psi | 87% | 2579 fps | 100% |
| Accurate 4064 | <<locked>> | 82% | 56,391 psi | 88% | 2507 fps | 100% |
| Accurate 4064 | <<locked>> | 82% | 55,985 psi | 88% | 2500 fps | 100% |
| Accurate 4350 | <<locked>> | 88% | 54,186 psi | 85% | 2575 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 57,566 psi | 90% | 2615 fps | 100% |
| Accurate High Country | <<locked>> | 94% | 54,027 psi | 85% | 2680 fps | 99% |
| Accurate High Country | <<locked>> | 96% | 57,406 psi | 90% | 2723 fps | 99.3% |
| Accurate MAGPRO | <<locked>> | 96% | 54,998 psi | 86% | 2680 fps | 98.1% |
| Accurate MAGPRO | <<locked>> | 96% | 54,317 psi | 85% | 2671 fps | 98% |
| ADI AR 2208 | <<locked>> | 84% | 56,463 psi | 88% | 2546 fps | 100% |
| ADI AR 2208 | <<locked>> | 84% | 56,130 psi | 88% | 2539 fps | 100% |
| ADI AR 2209 | <<locked>> | 94% | 55,448 psi | 87% | 2628 fps | 99.5% |
| ADI AR 2209 | <<locked>> | 94% | 54,940 psi | 86% | 2621 fps | 99.5% |
| ADI AR 2213 | <<locked>> | 98% | 56,826 psi | 89% | 2684 fps | 99.1% |
| ADI AR 2213 | <<locked>> | 98% | 56,391 psi | 88% | 2674 fps | 99% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 44,179 psi | 69% | 2477 fps | 97% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 43,656 psi | 68% | 2464 fps | 96.8% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 38,899 psi | 61% | 2438 fps | 98.6% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 38,595 psi | 60% | 2428 fps | 98.5% |
| Alliant Power Pro Varmint | <<locked>> | 94% | 55,550 psi | 87% | 2625 fps | 99.5% |
| Alliant Power Pro Varmint | <<locked>> | 94% | 55,100 psi | 86% | 2618 fps | 99.5% |
| Alliant Power Pro Varmint | <<locked>> | 94% | 55,100 psi | 86% | 2618 fps | 99.5% |
| Alliant Power Pro Varmint | <<locked>> | 94% | 55,100 psi | 86% | 2618 fps | 99.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 57,479 psi | 90% | 2562 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 57,130 psi | 90% | 2559 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 57,653 psi | 90% | 2585 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 57,087 psi | 89% | 2579 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 90% | 55,303 psi | 87% | 2628 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 90% | 54,926 psi | 86% | 2621 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 86% | 56,521 psi | 89% | 2641 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 86% | 56,188 psi | 88% | 2635 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 54,824 psi | 86% | 2618 fps | 99.5% |
| Alliant Reloder-19 | <<locked>> | 94% | 54,346 psi | 85% | 2608 fps | 99.4% |
| Alliant Reloder-22 | <<locked>> | 98% | 56,275 psi | 88% | 2677 fps | 99.7% |
| Alliant Reloder-22 | <<locked>> | 98% | 55,782 psi | 87% | 2667 fps | 99.7% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 57,188 psi | 90% | 2644 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 56,434 psi | 88% | 2635 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 49,255 psi | 77% | 2602 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 48,791 psi | 76% | 2592 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 94% | 53,417 psi | 84% | 2680 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 96% | 57,217 psi | 90% | 2726 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 98% | 55,477 psi | 87% | 2595 fps | 96.3% |
| Baschieri & Pellagri 109 | <<locked>> | 98% | 55,216 psi | 87% | 2589 fps | 96.2% |
| Bofors RP15ᴾ | <<locked>> | 100% | 55,172 psi | 86% | 2661 fps | 99.6% |
| Bofors RP15ᴾ | <<locked>> | 100% | 54,491 psi | 85% | 2651 fps | 99.5% |
| Bofors RP3 | <<locked>> | 82% | 54,679 psi | 86% | 2533 fps | 100% |
| Bofors RP3 | <<locked>> | 82% | 54,288 psi | 85% | 2526 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 45,121 psi | 71% | 2539 fps | 97.8% |
| Bofors RP30ᴾ | <<locked>> | 100% | 44,512 psi | 70% | 2530 fps | 97.6% |
| Bofors RP5 | <<locked>> | 98% | 56,275 psi | 88% | 2677 fps | 99.7% |
| Bofors RP5 | <<locked>> | 98% | 55,782 psi | 87% | 2667 fps | 99.7% |
| Bofors RP7 | <<locked>> | 88% | 57,551 psi | 90% | 2579 fps | 99.9% |
| Bofors RP7 | <<locked>> | 88% | 57,029 psi | 89% | 2572 fps | 99.9% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 48,704 psi | 76% | 2556 fps | 98.6% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 48,138 psi | 75% | 2546 fps | 98.4% |
| Hodgdon H380 | <<locked>> | 82% | 54,868 psi | 86% | 2552 fps | 100% |
| Hodgdon H380 | <<locked>> | 82% | 54,505 psi | 85% | 2546 fps | 100% |
| Hodgdon H414 | <<locked>> | 88% | 56,362 psi | 88% | 2628 fps | 100% |
| Hodgdon H414 | <<locked>> | 88% | 56,057 psi | 88% | 2621 fps | 100% |
| Hodgdon H4350 | <<locked>> | 86% | 55,709 psi | 87% | 2589 fps | 99.6% |
| Hodgdon H4350 | <<locked>> | 86% | 55,405 psi | 87% | 2582 fps | 99.6% |
| Hodgdon H4831 | <<locked>> | 96% | 56,811 psi | 89% | 2625 fps | 98.6% |
| Hodgdon H4831 | <<locked>> | 96% | 56,376 psi | 88% | 2618 fps | 98.5% |
| Hodgdon H4831 SC | <<locked>> | 96% | 55,666 psi | 87% | 2612 fps | 98.4% |
| Hodgdon H4831 SC | <<locked>> | 96% | 55,216 psi | 87% | 2602 fps | 98.3% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 55,738 psi | 87% | 2556 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 55,172 psi | 86% | 2546 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 48,196 psi | 76% | 2654 fps | 99.6% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 47,805 psi | 75% | 2644 fps | 99.5% |
| Hodgdon Superformance | <<locked>> | 88% | 56,898 psi | 89% | 2664 fps | 100% |
| Hodgdon Superformance | <<locked>> | 88% | 56,376 psi | 88% | 2654 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,709 psi | 58% | 1594 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,695 psi | 57% | 1591 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 55,854 psi | 88% | 2526 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 55,506 psi | 87% | 2520 fps | 100% |
| IMR 4350 | <<locked>> | 90% | 55,448 psi | 87% | 2566 fps | 99.9% |
| IMR 4350 | <<locked>> | 90% | 54,940 psi | 86% | 2559 fps | 99.8% |
| IMR 4451 Enduron | <<locked>> | 86% | 55,622 psi | 87% | 2556 fps | 99.9% |
| IMR 4451 Enduron | <<locked>> | 86% | 55,332 psi | 87% | 2549 fps | 99.9% |
| IMR 4831 | <<locked>> | 90% | 54,795 psi | 86% | 2569 fps | 100% |
| IMR 4831 | <<locked>> | 90% | 54,259 psi | 85% | 2559 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 54,592 psi | 86% | 2562 fps | 98.3% |
| IMR 4955 Enduron | <<locked>> | 96% | 57,624 psi | 90% | 2602 fps | 98.7% |
| IMR 7828 SSC | <<locked>> | 98% | 54,433 psi | 85% | 2661 fps | 98.9% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 57,682 psi | 90% | 2703 fps | 99.2% |
| Lovex S062 | <<locked>> | 82% | 55,970 psi | 88% | 2516 fps | 100% |
| Lovex S062 | <<locked>> | 82% | 55,593 psi | 87% | 2510 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 55,796 psi | 87% | 2549 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 55,477 psi | 87% | 2543 fps | 100% |
| Lovex S070 | <<locked>> | 90% | 57,479 psi | 90% | 2592 fps | 100% |
| Lovex S070 | <<locked>> | 90% | 56,942 psi | 89% | 2585 fps | 100% |
| Lovex S071ᴾ | <<locked>> | 100% | 50,024 psi | 78% | 2507 fps | 100% |
| Lovex S071ᴾ | <<locked>> | 100% | 49,530 psi | 78% | 2500 fps | 99.9% |
| Norma 203B | <<locked>> | 82% | 56,956 psi | 89% | 2572 fps | 100% |
| Norma 203B | <<locked>> | 82% | 56,376 psi | 88% | 2562 fps | 100% |
| Norma 204 | <<locked>> | 90% | 56,289 psi | 88% | 2618 fps | 99.5% |
| Norma 204 | <<locked>> | 90% | 55,782 psi | 87% | 2608 fps | 99.4% |
| Norma 217ᴾ | <<locked>> | 100% | 34,272 psi | 54% | 2365 fps | 96.5% |
| Norma 217ᴾ | <<locked>> | 100% | 33,939 psi | 53% | 2356 fps | 96.3% |
| Norma MRP | <<locked>> | 96% | 56,014 psi | 88% | 2697 fps | 100% |
| Norma MRP | <<locked>> | 96% | 55,506 psi | 87% | 2690 fps | 100% |
| Norma URP | <<locked>> | 90% | 56,695 psi | 89% | 2612 fps | 100% |
| Norma URP | <<locked>> | 90% | 56,173 psi | 88% | 2602 fps | 100% |
| Ramshot Big Game | <<locked>> | 82% | 57,479 psi | 90% | 2589 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 54,824 psi | 86% | 2674 fps | 99.2% |
| Ramshot Grand | <<locked>> | 98% | 54,404 psi | 85% | 2667 fps | 99.1% |
| Ramshot Hunter | <<locked>> | 90% | 55,463 psi | 87% | 2618 fps | 100% |
| Ramshot Hunter | <<locked>> | 90% | 54,955 psi | 86% | 2608 fps | 100% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 52,794 psi | 83% | 2615 fps | 99.8% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 52,344 psi | 82% | 2605 fps | 99.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,362 psi | 59% | 1631 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,347 psi | 59% | 1627 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 54,781 psi | 86% | 2543 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 54,505 psi | 85% | 2536 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 56,086 psi | 88% | 2631 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 55,709 psi | 87% | 2625 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 54,273 psi | 85% | 2598 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 57,595 psi | 90% | 2638 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 56,565 psi | 89% | 2674 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 56,057 psi | 88% | 2667 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 48,341 psi | 76% | 2648 fps | 99.9% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 47,979 psi | 75% | 2641 fps | 99.9% |
| Rottweil R 902 | <<locked>> | 82% | 57,740 psi | 90% | 2526 fps | 100% |
| Rottweil R 902 | <<locked>> | 82% | 57,377 psi | 90% | 2520 fps | 100% |
| Rottweil R 903 | <<locked>> | 84% | 54,984 psi | 86% | 2533 fps | 100% |
| Rottweil R 903 | <<locked>> | 84% | 54,404 psi | 85% | 2523 fps | 100% |
| Rottweil R 904 | <<locked>> | 94% | 56,869 psi | 89% | 2598 fps | 99% |
| Rottweil R 904 | <<locked>> | 94% | 56,376 psi | 88% | 2592 fps | 98.9% |
| Rottweil R 905 | <<locked>> | 94% | 54,099 psi | 85% | 2605 fps | 99.5% |
| Rottweil R 905 | <<locked>> | 96% | 57,246 psi | 90% | 2644 fps | 99.7% |
| Rottweil R 907 | <<locked>> | 88% | 57,551 psi | 90% | 2579 fps | 99.9% |
| Rottweil R 907 | <<locked>> | 88% | 57,029 psi | 89% | 2572 fps | 99.9% |
| Shooters World Long Rifle | <<locked>> | 88% | 55,796 psi | 87% | 2549 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 88% | 55,477 psi | 87% | 2543 fps | 100% |
| Shooters World Precision | <<locked>> | 82% | 55,970 psi | 88% | 2516 fps | 100% |
| Shooters World Precision | <<locked>> | 82% | 55,593 psi | 87% | 2510 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 57,479 psi | 90% | 2592 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 56,942 psi | 89% | 2585 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 56,681 psi | 89% | 2589 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 56,144 psi | 88% | 2579 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 55,390 psi | 87% | 2418 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 55,042 psi | 86% | 2411 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 55,347 psi | 87% | 2510 fps | 99.9% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 54,853 psi | 86% | 2500 fps | 99.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 57,290 psi | 90% | 2648 fps | 99.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 56,782 psi | 89% | 2641 fps | 99.7% |
| Somchem S355 | <<locked>> | 84% | 54,752 psi | 86% | 2526 fps | 100% |
| Somchem S355 | <<locked>> | 84% | 54,418 psi | 85% | 2520 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 54,810 psi | 86% | 2543 fps | 98.2% |
| Somchem S361 | <<locked>> | 92% | 54,418 psi | 85% | 2536 fps | 98.1% |
| Somchem S365 | <<locked>> | 92% | 56,565 psi | 89% | 2608 fps | 100% |
| Somchem S365 | <<locked>> | 92% | 55,956 psi | 88% | 2598 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 54,534 psi | 85% | 2579 fps | 99.8% |
| Somchem S385 | <<locked>> | 94% | 54,056 psi | 85% | 2572 fps | 99.8% |
| Vihtavuori N150 | <<locked>> | 86% | 56,086 psi | 88% | 2503 fps | 100% |
| Vihtavuori N150 | <<locked>> | 86% | 55,738 psi | 87% | 2497 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 54,940 psi | 86% | 2556 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 54,607 psi | 86% | 2549 fps | 100% |
| Vihtavuori N165 | <<locked>> | 98% | 54,099 psi | 85% | 2562 fps | 99.7% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 57,276 psi | 90% | 2598 fps | 99.8% |
| Vihtavuori N540 | <<locked>> | 82% | 56,666 psi | 89% | 2497 fps | 100% |
| Vihtavuori N540 | <<locked>> | 82% | 56,376 psi | 88% | 2493 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 57,725 psi | 90% | 2608 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 57,203 psi | 90% | 2598 fps | 100% |
| Vihtavuori N555 | <<locked>> | 96% | 55,695 psi | 87% | 2621 fps | 100% |
| Vihtavuori N555 | <<locked>> | 96% | 55,143 psi | 86% | 2615 fps | 100% |
| Vihtavuori N560 | <<locked>> | 96% | 56,086 psi | 88% | 2694 fps | 98.8% |
| Vihtavuori N560 | <<locked>> | 96% | 55,579 psi | 87% | 2684 fps | 98.7% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 51,445 psi | 81% | 2615 fps | 98.3% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 51,024 psi | 80% | 2605 fps | 98.2% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 54,636 psi | 86% | 2523 fps | 100% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 54,172 psi | 85% | 2513 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 56,579 psi | 89% | 2628 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 56,057 psi | 88% | 2621 fps | 100% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 53,896 psi | 84% | 2720 fps | 100% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 53,084 psi | 83% | 2710 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 54,810 psi | 86% | 2579 fps | 99.5% |
| Winchester Supreme 780 | <<locked>> | 96% | 54,143 psi | 85% | 2566 fps | 99.4% |
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% | 53,301 psi | 84% | 2487 fps | 99.6% |
| Accurate 2700 | <<locked>> | 80% | 53,011 psi | 83% | 2484 fps | 99.6% |
| Accurate 3100 | <<locked>> | 80% | 30,037 psi | 47% | 2146 fps | 96.2% |
| Accurate 3100 | <<locked>> | 80% | 29,747 psi | 47% | 2139 fps | 96% |
| Accurate 4064 | <<locked>> | 80% | 52,939 psi | 83% | 2464 fps | 100% |
| Accurate 4064 | <<locked>> | 80% | 52,518 psi | 82% | 2457 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 41,017 psi | 64% | 2379 fps | 99.9% |
| Accurate 4350 | <<locked>> | 80% | 40,640 psi | 64% | 2372 fps | 99.8% |
| Accurate High Country | <<locked>> | 84% | 37,695 psi | 59% | 2398 fps | 95.1% |
| Accurate High Country | <<locked>> | 86% | 40,147 psi | 63% | 2444 fps | 95.9% |
| Accurate MAGPRO | 78.6 gr | 90% | 44,266 psi | 69% | 2510 fps | 95.8% |
| Accurate MAGPRO | 78.6 gr | 90% | 43,816 psi | 69% | 2503 fps | 95.6% |
| ADI AR 2208 | <<locked>> | 80% | 49,850 psi | 78% | 2457 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 49,516 psi | 78% | 2451 fps | 100% |
| ADI AR 2209 | <<locked>> | 82% | 37,057 psi | 58% | 2320 fps | 95.8% |
| ADI AR 2209 | <<locked>> | 82% | 36,767 psi | 58% | 2310 fps | 95.7% |
| ADI AR 2213 | <<locked>> | 88% | 40,321 psi | 63% | 2411 fps | 95.5% |
| ADI AR 2213 | <<locked>> | 88% | 40,103 psi | 63% | 2405 fps | 95.4% |
| ADI AR 2217 | <<locked>> | 96% | 38,566 psi | 60% | 2369 fps | 95.1% |
| ADI AR 2217 | <<locked>> | 98% | 40,857 psi | 64% | 2411 fps | 95.9% |
| ADI AR 2225 | <<locked>> | 94% | 31,981 psi | 50% | 2277 fps | 95.9% |
| ADI AR 2225 | <<locked>> | 94% | 31,676 psi | 50% | 2264 fps | 95.6% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 34,838 psi | 55% | 2270 fps | 95.1% |
| Alliant Power Pro Varmint | <<locked>> | 82% | 36,898 psi | 58% | 2313 fps | 95.8% |
| Alliant Power Pro Varmint | <<locked>> | 82% | 36,898 psi | 58% | 2313 fps | 95.8% |
| Alliant Power Pro Varmint | <<locked>> | 82% | 36,898 psi | 58% | 2313 fps | 95.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 50,560 psi | 79% | 2474 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 50,169 psi | 79% | 2467 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 53,983 psi | 85% | 2539 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 53,621 psi | 84% | 2533 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 39,813 psi | 62% | 2392 fps | 99.9% |
| Alliant Reloder-16 | <<locked>> | 80% | 39,465 psi | 62% | 2382 fps | 99.9% |
| Alliant Reloder-17 | <<locked>> | 80% | 45,585 psi | 71% | 2497 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 80% | 45,208 psi | 71% | 2487 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 34,505 psi | 54% | 2264 fps | 95% |
| Alliant Reloder-19 | <<locked>> | 82% | 36,550 psi | 57% | 2306 fps | 95.7% |
| Alliant Reloder-22 | <<locked>> | 84% | 34,853 psi | 55% | 2310 fps | 95.3% |
| Alliant Reloder-22 | <<locked>> | 84% | 34,403 psi | 54% | 2300 fps | 95.1% |
| Alliant Reloder-23 | <<locked>> | 80% | 29,167 psi | 46% | 2178 fps | 99.1% |
| Alliant Reloder-23 | <<locked>> | 80% | 28,877 psi | 45% | 2172 fps | 99% |
| Alliant Reloder-25 | <<locked>> | 82% | 27,224 psi | 43% | 2142 fps | 95.3% |
| Alliant Reloder-25 | <<locked>> | 82% | 26,977 psi | 42% | 2133 fps | 95.1% |
| Alliant Reloder-26 | <<locked>> | 80% | 31,430 psi | 49% | 2290 fps | 98.2% |
| Alliant Reloder-26 | <<locked>> | 80% | 31,024 psi | 49% | 2280 fps | 98% |
| Baschieri & Pellagri 109 | <<locked>> | 96% | 52,228 psi | 82% | 2546 fps | 95.5% |
| Baschieri & Pellagri 109 | <<locked>> | 96% | 51,735 psi | 81% | 2536 fps | 95.3% |
| Bofors RP15 | <<locked>> | 86% | 34,534 psi | 54% | 2303 fps | 95% |
| Bofors RP15 | <<locked>> | 88% | 36,593 psi | 57% | 2346 fps | 95.8% |
| Bofors RP3 | <<locked>> | 80% | 51,068 psi | 80% | 2487 fps | 100% |
| Bofors RP3 | <<locked>> | 80% | 50,691 psi | 79% | 2480 fps | 100% |
| Bofors RP30 | <<locked>> | 94% | 36,695 psi | 57% | 2382 fps | 95.2% |
| Bofors RP30 | <<locked>> | 94% | 36,303 psi | 57% | 2372 fps | 95% |
| Bofors RP5 | <<locked>> | 84% | 34,853 psi | 55% | 2310 fps | 95.3% |
| Bofors RP5 | <<locked>> | 84% | 34,403 psi | 54% | 2300 fps | 95.1% |
| Bofors RP7 | <<locked>> | 80% | 44,628 psi | 70% | 2388 fps | 98.7% |
| Bofors RP7 | <<locked>> | 80% | 44,309 psi | 69% | 2382 fps | 98.6% |
| Hodgdon H1000 | <<locked>> | 92% | 36,970 psi | 58% | 2336 fps | 95.2% |
| Hodgdon H1000 | <<locked>> | 92% | 36,608 psi | 57% | 2329 fps | 95% |
| Hodgdon H380 | <<locked>> | 80% | 51,271 psi | 80% | 2503 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 50,937 psi | 80% | 2497 fps | 100% |
| Hodgdon H414 | <<locked>> | 80% | 43,004 psi | 67% | 2425 fps | 98.9% |
| Hodgdon H414 | <<locked>> | 80% | 42,685 psi | 67% | 2418 fps | 98.8% |
| Hodgdon H4350 | <<locked>> | 80% | 45,847 psi | 72% | 2441 fps | 98.4% |
| Hodgdon H4350 | <<locked>> | 80% | 45,527 psi | 71% | 2431 fps | 98.3% |
| Hodgdon H4831 | <<locked>> | 88% | 43,207 psi | 68% | 2418 fps | 95.8% |
| Hodgdon H4831 | <<locked>> | 88% | 42,743 psi | 67% | 2408 fps | 95.6% |
| Hodgdon H4831 SC | <<locked>> | 88% | 42,337 psi | 66% | 2402 fps | 95.5% |
| Hodgdon H4831 SC | <<locked>> | 88% | 42,061 psi | 66% | 2395 fps | 95.4% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 37,217 psi | 58% | 2287 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 37,043 psi | 58% | 2283 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 90% | 34,548 psi | 54% | 2369 fps | 95.7% |
| Hodgdon Retumbo | <<locked>> | 90% | 34,200 psi | 54% | 2359 fps | 95.4% |
| Hodgdon Superformance | <<locked>> | 80% | 42,163 psi | 66% | 2444 fps | 98.6% |
| Hodgdon Superformance | <<locked>> | 80% | 41,698 psi | 65% | 2434 fps | 98.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,383 psi | 43% | 1424 fps | 100% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,311 psi | 43% | 1421 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 52,475 psi | 82% | 2484 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 52,098 psi | 82% | 2477 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 40,147 psi | 63% | 2326 fps | 97.9% |
| IMR 4350 | <<locked>> | 80% | 39,842 psi | 62% | 2320 fps | 97.7% |
| IMR 4451 Enduron | <<locked>> | 80% | 46,093 psi | 72% | 2415 fps | 99.2% |
| IMR 4451 Enduron | <<locked>> | 80% | 45,788 psi | 72% | 2405 fps | 99.1% |
| IMR 4831 | <<locked>> | 80% | 39,363 psi | 62% | 2336 fps | 99.8% |
| IMR 4831 | <<locked>> | 80% | 39,030 psi | 61% | 2329 fps | 99.7% |
| IMR 4955 Enduron | <<locked>> | 86% | 42,293 psi | 66% | 2369 fps | 95.7% |
| IMR 4955 Enduron | <<locked>> | 86% | 41,872 psi | 66% | 2359 fps | 95.5% |
| IMR 7828 SSC | <<locked>> | 88% | 38,551 psi | 60% | 2388 fps | 95% |
| IMR 7828 SSC | <<locked>> | 90% | 40,901 psi | 64% | 2431 fps | 95.8% |
| Lovex S062 | <<locked>> | 80% | 52,591 psi | 82% | 2474 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 52,199 psi | 82% | 2467 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 43,540 psi | 68% | 2369 fps | 99.6% |
| Lovex S065 | <<locked>> | 80% | 43,207 psi | 68% | 2362 fps | 99.5% |
| Lovex S070 | <<locked>> | 80% | 41,756 psi | 65% | 2356 fps | 98.8% |
| Lovex S070 | <<locked>> | 80% | 41,437 psi | 65% | 2349 fps | 98.7% |
| Lovex S071 | <<locked>> | 82% | 27,572 psi | 43% | 2087 fps | 95.1% |
| Lovex S071 | <<locked>> | 84% | 29,138 psi | 46% | 2123 fps | 95.8% |
| Norma 203B | <<locked>> | 80% | 53,301 psi | 84% | 2526 fps | 100% |
| Norma 203B | <<locked>> | 80% | 52,924 psi | 83% | 2520 fps | 100% |
| Norma 204 | <<locked>> | 80% | 39,943 psi | 63% | 2359 fps | 96.7% |
| Norma 204 | <<locked>> | 80% | 39,479 psi | 62% | 2346 fps | 96.5% |
| Norma 217 | <<locked>> | 98% | 32,097 psi | 50% | 2313 fps | 95.5% |
| Norma 217 | <<locked>> | 98% | 31,778 psi | 50% | 2303 fps | 95.2% |
| Norma MRP | 68.6 gr | 80% | 31,575 psi | 49% | 2260 fps | 95.5% |
| Norma MRP | 68.6 gr | 80% | 31,314 psi | 49% | 2254 fps | 95.3% |
| Norma URP | <<locked>> | 80% | 40,683 psi | 64% | 2372 fps | 99.8% |
| Norma URP | <<locked>> | 80% | 40,379 psi | 63% | 2365 fps | 99.8% |
| Ramshot Big Game | <<locked>> | 80% | 53,780 psi | 84% | 2543 fps | 100% |
| Ramshot Grand | <<locked>> | 88% | 38,203 psi | 60% | 2392 fps | 95.3% |
| Ramshot Grand | <<locked>> | 88% | 37,797 psi | 59% | 2382 fps | 95.1% |
| Ramshot Hunter | <<locked>> | 80% | 39,595 psi | 62% | 2369 fps | 98.9% |
| Ramshot Hunter | <<locked>> | 80% | 39,131 psi | 61% | 2359 fps | 98.8% |
| Ramshot Magnum | <<locked>> | 88% | 33,823 psi | 53% | 2283 fps | 95.8% |
| Ramshot Magnum | <<locked>> | 88% | 33,460 psi | 52% | 2274 fps | 95.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,876 psi | 44% | 1457 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,949 psi | 44% | 1457 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 51,358 psi | 80% | 2493 fps | 99.9% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 50,821 psi | 80% | 2484 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 48,428 psi | 76% | 2533 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 48,051 psi | 75% | 2526 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 41,031 psi | 64% | 2402 fps | 99.8% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 40,538 psi | 64% | 2388 fps | 99.7% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 39,494 psi | 62% | 2411 fps | 99.6% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 39,218 psi | 61% | 2405 fps | 99.6% |
| ReloadSwiss RS 76 | <<locked>> | 88% | 31,430 psi | 49% | 2290 fps | 95.4% |
| ReloadSwiss RS 76 | <<locked>> | 88% | 31,125 psi | 49% | 2280 fps | 95.1% |
| Rottweil R 902 | <<locked>> | 80% | 54,273 psi | 85% | 2484 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 53,882 psi | 84% | 2474 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 48,138 psi | 75% | 2441 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 47,761 psi | 75% | 2434 fps | 100% |
| Rottweil R 904 | <<locked>> | 82% | 38,479 psi | 60% | 2303 fps | 95.1% |
| Rottweil R 904 | <<locked>> | 84% | 40,770 psi | 64% | 2346 fps | 95.8% |
| Rottweil R 905 | <<locked>> | 82% | 35,969 psi | 56% | 2300 fps | 95.8% |
| Rottweil R 905 | <<locked>> | 82% | 35,636 psi | 56% | 2290 fps | 95.6% |
| Rottweil R 907 | <<locked>> | 80% | 44,628 psi | 70% | 2388 fps | 98.7% |
| Rottweil R 907 | <<locked>> | 80% | 44,309 psi | 69% | 2382 fps | 98.6% |
| Shooters World Long Rifle | <<locked>> | 80% | 43,540 psi | 68% | 2369 fps | 99.6% |
| Shooters World Long Rifle | <<locked>> | 80% | 43,207 psi | 68% | 2362 fps | 99.5% |
| Shooters World Precision | <<locked>> | 80% | 52,591 psi | 82% | 2474 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 52,199 psi | 82% | 2467 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 41,756 psi | 65% | 2356 fps | 98.8% |
| Shooters World SW4350 | <<locked>> | 80% | 41,437 psi | 65% | 2349 fps | 98.7% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 49,632 psi | 78% | 2493 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 49,095 psi | 77% | 2484 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 48,979 psi | 77% | 2339 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 48,617 psi | 76% | 2333 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 42,438 psi | 67% | 2320 fps | 98.8% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 42,134 psi | 66% | 2313 fps | 98.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 82% | 35,650 psi | 56% | 2293 fps | 95.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 82% | 35,317 psi | 55% | 2283 fps | 95.5% |
| Somchem S355 | <<locked>> | 80% | 48,312 psi | 76% | 2441 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 47,935 psi | 75% | 2434 fps | 100% |
| Somchem S361 | <<locked>> | 84% | 41,771 psi | 65% | 2343 fps | 95.3% |
| Somchem S361 | <<locked>> | 84% | 41,524 psi | 65% | 2336 fps | 95.1% |
| Somchem S365 | <<locked>> | 80% | 37,246 psi | 58% | 2333 fps | 100% |
| Somchem S365 | <<locked>> | 80% | 36,883 psi | 58% | 2326 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 34,127 psi | 53% | 2234 fps | 96% |
| Somchem S385 | <<locked>> | 80% | 33,852 psi | 53% | 2224 fps | 95.9% |
| Vihtavuori N150 | <<locked>> | 80% | 46,137 psi | 72% | 2372 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 45,818 psi | 72% | 2365 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 42,105 psi | 66% | 2369 fps | 99.9% |
| Vihtavuori N160 | <<locked>> | 80% | 41,785 psi | 65% | 2362 fps | 99.9% |
| Vihtavuori N165 | <<locked>> | 84% | 33,750 psi | 53% | 2218 fps | 95.5% |
| Vihtavuori N165 | <<locked>> | 84% | 33,460 psi | 52% | 2211 fps | 95.3% |
| Vihtavuori N540 | <<locked>> | 80% | 53,142 psi | 83% | 2454 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 52,808 psi | 83% | 2448 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 41,408 psi | 65% | 2372 fps | 99.8% |
| Vihtavuori N550 | <<locked>> | 80% | 41,104 psi | 64% | 2362 fps | 99.7% |
| Vihtavuori N555 | <<locked>> | 80% | 32,474 psi | 51% | 2244 fps | 99% |
| Vihtavuori N555 | <<locked>> | 80% | 32,140 psi | 50% | 2234 fps | 98.9% |
| Vihtavuori N560 | 75.4 gr | 88% | 42,351 psi | 66% | 2474 fps | 95.9% |
| Vihtavuori N560 | 75.4 gr | 88% | 41,901 psi | 66% | 2464 fps | 95.7% |
| Vihtavuori N565 | <<locked>> | 92% | 38,899 psi | 61% | 2402 fps | 95.1% |
| Vihtavuori N565 | <<locked>> | 94% | 41,336 psi | 65% | 2444 fps | 95.9% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 41,089 psi | 64% | 2336 fps | 100% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 40,843 psi | 64% | 2329 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 43,192 psi | 68% | 2428 fps | 98.9% |
| Winchester 760 | <<locked>> | 80% | 42,830 psi | 67% | 2421 fps | 98.8% |
| Winchester StaBALL HD | <<locked>> | 80% | 25,657 psi | 40% | 2178 fps | 99% |
| Winchester StaBALL HD | <<locked>> | 80% | 25,353 psi | 40% | 2165 fps | 98.8% |
| Winchester Supreme 780 | <<locked>> | 84% | 35,810 psi | 56% | 2267 fps | 95.5% |
| Winchester Supreme 780 | <<locked>> | 84% | 35,563 psi | 56% | 2260 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 181 powders for .338 Rem. Ultra Mag. loaded with the .338 | 254gr | CutEdge MTAC. Alliant Reloder-26 delivers the highest muzzle velocity at 2,726 fps; across all powders the maximum-charge window runs from 1,591 fps to 2,726 fps. ADI AR 2217 gives the best case fill at 100 %, and 181 of the 181 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 53–90 %, leaving at least 10 % headroom. The 254.0 gr projectile in 0.338" calls for a 1:10.5 twist; slower twists will usually not stabilise this weight. ADI AR 2217, ADI AR 2217, ADI AR 2225 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, Norma MRP, Accurate MAGPRO rank at the top here: for .338 Rem. Ultra Mag. with the .338 | 254gr | CutEdge MTAC 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.