Load Specifications
Load data in caliber .338 Rem. Ultra Mag. with .338 | 230gr | Nosler CT FailSafe bullet and 81 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Norma MRP, Vihtavuori N560 and ADI AR 2213.
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>> | 96% | 54,114 psi | 85% | 2687 fps | 100% |
| Accurate 4350 | <<locked>> | 88% | 55,738 psi | 87% | 2726 fps | 100% |
| Accurate MAGPRO | <<locked>> | 96% | 56,420 psi | 88% | 2828 fps | 97.9% |
| ADI AR 2208 | <<locked>> | 84% | 57,450 psi | 90% | 2694 fps | 100% |
| ADI AR 2209 | <<locked>> | 94% | 56,550 psi | 89% | 2776 fps | 99.3% |
| ADI AR 2213 | <<locked>> | 96% | 54,302 psi | 85% | 2776 fps | 98.3% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 45,295 psi | 71% | 2612 fps | 96.6% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 40,248 psi | 63% | 2575 fps | 98.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 55,056 psi | 86% | 2667 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 90% | 56,492 psi | 89% | 2776 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 84% | 53,954 psi | 85% | 2743 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 56,101 psi | 88% | 2766 fps | 99.3% |
| Alliant Reloder-22 | <<locked>> | 96% | 54,012 psi | 85% | 2772 fps | 99.2% |
| Alliant Reloder-23 | <<locked>> | 98% | 54,781 psi | 86% | 2746 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 50,618 psi | 79% | 2749 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 94% | 55,114 psi | 86% | 2831 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 98% | 56,681 psi | 89% | 2736 fps | 95.9% |
| Bofors RP15ᴾ | <<locked>> | 100% | 56,420 psi | 88% | 2805 fps | 99.4% |
| Bofors RP3 | <<locked>> | 82% | 56,086 psi | 88% | 2684 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 46,601 psi | 73% | 2680 fps | 97.5% |
| Bofors RP5 | <<locked>> | 96% | 54,012 psi | 85% | 2772 fps | 99.2% |
| Bofors RP7 | <<locked>> | 86% | 55,071 psi | 86% | 2677 fps | 99.6% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 50,024 psi | 78% | 2700 fps | 98.3% |
| Hodgdon H380 | <<locked>> | 82% | 56,231 psi | 88% | 2700 fps | 100% |
| Hodgdon H414 | <<locked>> | 88% | 57,740 psi | 90% | 2779 fps | 100% |
| Hodgdon H4350 | <<locked>> | 86% | 56,927 psi | 89% | 2736 fps | 99.5% |
| Hodgdon H4831 | <<locked>> | 94% | 54,317 psi | 85% | 2717 fps | 97.7% |
| Hodgdon H4831 SC | <<locked>> | 96% | 57,029 psi | 89% | 2756 fps | 98.1% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 56,884 psi | 89% | 2700 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 49,661 psi | 78% | 2802 fps | 99.4% |
| Hodgdon Superformance | <<locked>> | 86% | 54,273 psi | 85% | 2759 fps | 99.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,767 psi | 58% | 1699 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 56,724 psi | 89% | 2674 fps | 100% |
| IMR 4350 | <<locked>> | 90% | 56,565 psi | 89% | 2713 fps | 99.7% |
| IMR 4451 Enduron | <<locked>> | 86% | 56,579 psi | 89% | 2700 fps | 99.9% |
| IMR 4831 | <<locked>> | 90% | 56,188 psi | 88% | 2717 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 55,622 psi | 87% | 2703 fps | 98% |
| IMR 7828 SSC | <<locked>> | 98% | 55,622 psi | 87% | 2805 fps | 98.6% |
| Lovex S062 | <<locked>> | 82% | 57,188 psi | 90% | 2667 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 57,043 psi | 89% | 2697 fps | 100% |
| Lovex S070 | <<locked>> | 88% | 55,201 psi | 87% | 2694 fps | 99.9% |
| Lovex S071ᴾ | <<locked>> | 100% | 51,663 psi | 81% | 2654 fps | 99.9% |
| Norma 204 | <<locked>> | 90% | 57,493 psi | 90% | 2766 fps | 99.3% |
| Norma 217ᴾ | <<locked>> | 100% | 35,810 psi | 56% | 2503 fps | 96.2% |
| Norma MRP | <<locked>> | 96% | 57,682 psi | 90% | 2851 fps | 100% |
| Norma URP | <<locked>> | 88% | 54,346 psi | 85% | 2713 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 56,449 psi | 88% | 2825 fps | 99% |
| Ramshot Hunter | <<locked>> | 90% | 56,739 psi | 89% | 2762 fps | 100% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 54,636 psi | 86% | 2766 fps | 99.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,565 psi | 59% | 1739 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 55,840 psi | 88% | 2687 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 57,348 psi | 90% | 2782 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 55,811 psi | 87% | 2749 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 53,911 psi | 84% | 2772 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 50,111 psi | 79% | 2799 fps | 99.9% |
| Rottweil R 903 | <<locked>> | 84% | 56,159 psi | 88% | 2680 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 54,375 psi | 85% | 2694 fps | 98.3% |
| Rottweil R 905 | <<locked>> | 94% | 55,419 psi | 87% | 2753 fps | 99.3% |
| Rottweil R 907 | <<locked>> | 86% | 55,071 psi | 86% | 2677 fps | 99.6% |
| Shooters World Long Rifle | <<locked>> | 88% | 57,043 psi | 89% | 2697 fps | 100% |
| Shooters World Precision | <<locked>> | 82% | 57,188 psi | 90% | 2667 fps | 100% |
| Shooters World SW4350 | <<locked>> | 88% | 55,201 psi | 87% | 2694 fps | 99.9% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 54,215 psi | 85% | 2687 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 56,463 psi | 88% | 2562 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 56,608 psi | 89% | 2654 fps | 99.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 54,955 psi | 86% | 2746 fps | 99.3% |
| Somchem S355 | <<locked>> | 84% | 55,927 psi | 88% | 2674 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 56,014 psi | 88% | 2687 fps | 97.9% |
| Somchem S365 | <<locked>> | 90% | 54,375 psi | 85% | 2713 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 56,101 psi | 88% | 2726 fps | 99.7% |
| Vihtavuori N150 | <<locked>> | 86% | 57,246 psi | 90% | 2648 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 56,144 psi | 88% | 2700 fps | 100% |
| Vihtavuori N165 | <<locked>> | 98% | 55,434 psi | 87% | 2703 fps | 99.5% |
| Vihtavuori N550 | <<locked>> | 88% | 55,332 psi | 87% | 2707 fps | 100% |
| Vihtavuori N555 | <<locked>> | 96% | 57,377 psi | 90% | 2776 fps | 100% |
| Vihtavuori N560 | <<locked>> | 96% | 57,638 psi | 90% | 2844 fps | 98.5% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 53,142 psi | 83% | 2759 fps | 98.1% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 55,811 psi | 87% | 2664 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 57,740 psi | 90% | 2779 fps | 100% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 55,680 psi | 87% | 2871 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 56,101 psi | 88% | 2723 fps | 99.3% |
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% | 31,459 psi | 49% | 2280 fps | 96% |
| Accurate 4350 | <<locked>> | 80% | 42,438 psi | 67% | 2523 fps | 99.8% |
| Accurate MAGPRO | <<locked>> | 90% | 45,701 psi | 72% | 2651 fps | 95.4% |
| ADI AR 2208 | <<locked>> | 80% | 50,705 psi | 79% | 2602 fps | 100% |
| ADI AR 2209 | <<locked>> | 82% | 38,058 psi | 60% | 2454 fps | 95.4% |
| ADI AR 2213 | 79.3 gr | 88% | 41,466 psi | 65% | 2549 fps | 95.1% |
| ADI AR 2217 | <<locked>> | 98% | 42,482 psi | 67% | 2556 fps | 95.7% |
| ADI AR 2225 | <<locked>> | 94% | 33,170 psi | 52% | 2405 fps | 95.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 51,648 psi | 81% | 2618 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 40,683 psi | 64% | 2526 fps | 99.8% |
| Alliant Reloder-17 | <<locked>> | 80% | 46,847 psi | 73% | 2641 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 82% | 37,971 psi | 60% | 2448 fps | 95.5% |
| Alliant Reloder-22 | <<locked>> | 86% | 38,522 psi | 60% | 2500 fps | 95.9% |
| Alliant Reloder-23 | <<locked>> | 80% | 30,153 psi | 47% | 2306 fps | 98.8% |
| Alliant Reloder-25 | <<locked>> | 84% | 30,081 psi | 47% | 2320 fps | 96% |
| Alliant Reloder-26 | <<locked>> | 80% | 32,619 psi | 51% | 2425 fps | 97.9% |
| Baschieri & Pellagri 109 | <<locked>> | 96% | 53,229 psi | 83% | 2684 fps | 95.1% |
| Bofors RP15 | <<locked>> | 88% | 38,159 psi | 60% | 2490 fps | 95.6% |
| Bofors RP3 | <<locked>> | 80% | 52,518 psi | 82% | 2635 fps | 100% |
| Bofors RP30 | <<locked>> | 96% | 40,625 psi | 64% | 2569 fps | 95.8% |
| Bofors RP5 | <<locked>> | 86% | 38,522 psi | 60% | 2500 fps | 95.9% |
| Bofors RP7 | <<locked>> | 80% | 45,687 psi | 72% | 2530 fps | 98.4% |
| Hodgdon H1000 | <<locked>> | 94% | 40,756 psi | 64% | 2526 fps | 95.8% |
| Hodgdon H380 | <<locked>> | 80% | 52,475 psi | 82% | 2651 fps | 100% |
| Hodgdon H414 | <<locked>> | 80% | 44,077 psi | 69% | 2566 fps | 98.6% |
| Hodgdon H4350 | <<locked>> | 80% | 46,905 psi | 74% | 2582 fps | 98.1% |
| Hodgdon H4831 | <<locked>> | 88% | 44,353 psi | 70% | 2556 fps | 95.4% |
| Hodgdon H4831 SC | <<locked>> | 88% | 43,497 psi | 68% | 2539 fps | 95.1% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 38,435 psi | 60% | 2425 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 90% | 35,650 psi | 56% | 2500 fps | 95.2% |
| Hodgdon Superformance | <<locked>> | 80% | 43,279 psi | 68% | 2579 fps | 98.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,514 psi | 43% | 1519 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 53,316 psi | 84% | 2628 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 41,162 psi | 65% | 2461 fps | 97.5% |
| IMR 4451 Enduron | <<locked>> | 80% | 46,949 psi | 74% | 2552 fps | 99% |
| IMR 4831 | <<locked>> | 80% | 40,466 psi | 63% | 2474 fps | 99.6% |
| IMR 4955 Enduron | <<locked>> | 86% | 43,236 psi | 68% | 2500 fps | 95.2% |
| IMR 7828 SSC | <<locked>> | 90% | 42,380 psi | 66% | 2579 fps | 95.5% |
| Lovex S062 | <<locked>> | 80% | 53,838 psi | 84% | 2625 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 44,527 psi | 70% | 2507 fps | 99.4% |
| Lovex S070 | <<locked>> | 80% | 42,859 psi | 67% | 2493 fps | 98.5% |
| Lovex S071 | <<locked>> | 84% | 30,864 psi | 48% | 2267 fps | 95.7% |
| Norma 204 | <<locked>> | 80% | 40,886 psi | 64% | 2490 fps | 96.2% |
| Norma 217 | <<locked>> | 98% | 33,460 psi | 52% | 2444 fps | 95.1% |
| Norma MRP | 74.4 gr | 80% | 32,750 psi | 51% | 2392 fps | 95.1% |
| Norma URP | <<locked>> | 80% | 41,771 psi | 65% | 2510 fps | 99.7% |
| Ramshot Grand | <<locked>> | 90% | 42,235 psi | 66% | 2585 fps | 95.9% |
| Ramshot Hunter | <<locked>> | 80% | 40,611 psi | 64% | 2503 fps | 98.6% |
| Ramshot Magnum | <<locked>> | 88% | 35,085 psi | 55% | 2415 fps | 95.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,137 psi | 44% | 1558 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 52,417 psi | 82% | 2638 fps | 99.8% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 49,734 psi | 78% | 2680 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 42,264 psi | 66% | 2539 fps | 99.7% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 40,582 psi | 64% | 2549 fps | 99.4% |
| ReloadSwiss RS 76 | <<locked>> | 88% | 32,663 psi | 51% | 2421 fps | 95% |
| Rottweil R 903 | <<locked>> | 80% | 49,356 psi | 77% | 2585 fps | 100% |
| Rottweil R 904 | <<locked>> | 84% | 42,105 psi | 66% | 2487 fps | 95.5% |
| Rottweil R 905 | <<locked>> | 82% | 37,115 psi | 58% | 2431 fps | 95.4% |
| Rottweil R 907 | <<locked>> | 80% | 45,687 psi | 72% | 2530 fps | 98.4% |
| Shooters World Long Rifle | <<locked>> | 80% | 44,527 psi | 70% | 2507 fps | 99.4% |
| Shooters World Precision | <<locked>> | 80% | 53,838 psi | 84% | 2625 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 42,859 psi | 67% | 2493 fps | 98.5% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 50,618 psi | 79% | 2638 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 49,893 psi | 78% | 2480 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 43,598 psi | 68% | 2454 fps | 98.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 82% | 36,782 psi | 58% | 2425 fps | 95.2% |
| Somchem S355 | <<locked>> | 80% | 49,313 psi | 77% | 2582 fps | 100% |
| Somchem S361 | <<locked>> | 86% | 45,876 psi | 72% | 2526 fps | 95.7% |
| Somchem S365 | <<locked>> | 80% | 38,522 psi | 60% | 2470 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 35,404 psi | 55% | 2365 fps | 95.7% |
| Vihtavuori N150 | <<locked>> | 80% | 47,224 psi | 74% | 2513 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 43,221 psi | 68% | 2507 fps | 99.8% |
| Vihtavuori N165 | <<locked>> | 84% | 34,925 psi | 55% | 2349 fps | 95.1% |
| Vihtavuori N550 | <<locked>> | 80% | 42,569 psi | 67% | 2510 fps | 99.7% |
| Vihtavuori N555 | <<locked>> | 80% | 33,779 psi | 53% | 2379 fps | 98.8% |
| Vihtavuori N560 | 81.8 gr | 88% | 43,540 psi | 68% | 2612 fps | 95.4% |
| Vihtavuori N565 | <<locked>> | 94% | 43,221 psi | 68% | 2592 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 42,221 psi | 66% | 2470 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 44,251 psi | 69% | 2569 fps | 98.7% |
| Winchester StaBALL HD | <<locked>> | 80% | 26,774 psi | 42% | 2306 fps | 98.7% |
| Winchester Supreme 780 | <<locked>> | 84% | 37,028 psi | 58% | 2402 fps | 95.2% |
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 81 powders for .338 Rem. Ultra Mag. loaded with the .338 | 230gr | Nosler CT FailSafe. Winchester StaBALL HD delivers the highest muzzle velocity at 2,871 fps; across all powders the maximum-charge window runs from 1,699 fps to 2,871 fps. ADI AR 2217 gives the best case fill at 100 %, and 81 of the 81 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 230.0 gr projectile in 0.338" calls for a 1:14.5 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. Norma MRP, Vihtavuori N560, ADI AR 2213 rank at the top here: for .338 Rem. Ultra Mag. with the .338 | 230gr | Nosler CT FailSafe 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.