Load Specifications
Load data in caliber .338 Rem. Ultra Mag. with .338 | 254gr | Peregrine VLR-5 bullet and 87 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.
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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 2700 | <<locked>> | 82% | 56,637 psi | 89% | 2533 fps | 99.8% |
| Accurate 3100 | <<locked>> | 98% | 55,724 psi | 87% | 2582 fps | 100% |
| Accurate 4064 | <<locked>> | 82% | 56,043 psi | 88% | 2503 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 57,595 psi | 90% | 2615 fps | 100% |
| Accurate MAGPRO | <<locked>> | 96% | 54,578 psi | 86% | 2674 fps | 98% |
| ADI AR 2208 | <<locked>> | 84% | 56,188 psi | 88% | 2539 fps | 100% |
| ADI AR 2209 | <<locked>> | 94% | 55,013 psi | 86% | 2621 fps | 99.5% |
| ADI AR 2213 | <<locked>> | 98% | 56,391 psi | 88% | 2674 fps | 99% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 43,830 psi | 69% | 2470 fps | 96.9% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 38,609 psi | 61% | 2431 fps | 98.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 57,174 psi | 90% | 2559 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 57,363 psi | 90% | 2582 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 90% | 55,013 psi | 86% | 2621 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 86% | 56,231 psi | 88% | 2638 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 54,418 psi | 85% | 2612 fps | 99.4% |
| Alliant Reloder-22 | <<locked>> | 98% | 55,811 psi | 87% | 2671 fps | 99.7% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 56,695 psi | 89% | 2638 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 48,849 psi | 77% | 2595 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 96% | 57,217 psi | 90% | 2726 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 98% | 55,187 psi | 86% | 2589 fps | 96.2% |
| Bofors RP15ᴾ | <<locked>> | 100% | 54,723 psi | 86% | 2651 fps | 99.5% |
| Bofors RP3 | <<locked>> | 82% | 54,389 psi | 85% | 2530 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 44,773 psi | 70% | 2533 fps | 97.7% |
| Bofors RP5 | <<locked>> | 98% | 55,811 psi | 87% | 2671 fps | 99.7% |
| Bofors RP7 | <<locked>> | 88% | 57,305 psi | 90% | 2575 fps | 99.9% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 48,356 psi | 76% | 2549 fps | 98.5% |
| Hodgdon H380 | <<locked>> | 82% | 54,549 psi | 85% | 2546 fps | 100% |
| Hodgdon H414 | <<locked>> | 88% | 56,115 psi | 88% | 2621 fps | 100% |
| Hodgdon H4350 | <<locked>> | 86% | 55,463 psi | 87% | 2585 fps | 99.6% |
| Hodgdon H4831 | <<locked>> | 96% | 56,376 psi | 88% | 2618 fps | 98.5% |
| Hodgdon H4831 SC | <<locked>> | 96% | 55,245 psi | 87% | 2602 fps | 98.3% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 55,230 psi | 87% | 2549 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 47,805 psi | 75% | 2648 fps | 99.5% |
| Hodgdon Superformance | <<locked>> | 88% | 56,637 psi | 89% | 2657 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,622 psi | 57% | 1591 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 55,579 psi | 87% | 2523 fps | 100% |
| IMR 4350 | <<locked>> | 90% | 55,013 psi | 86% | 2559 fps | 99.8% |
| IMR 4451 Enduron | <<locked>> | 86% | 55,361 psi | 87% | 2549 fps | 99.9% |
| IMR 4831 | <<locked>> | 90% | 54,505 psi | 85% | 2566 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 57,638 psi | 90% | 2602 fps | 98.7% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 57,740 psi | 90% | 2707 fps | 99.3% |
| Lovex S062 | <<locked>> | 82% | 55,680 psi | 87% | 2513 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 55,506 psi | 87% | 2543 fps | 100% |
| Lovex S070 | <<locked>> | 90% | 56,985 psi | 89% | 2585 fps | 100% |
| Lovex S071ᴾ | <<locked>> | 100% | 49,559 psi | 78% | 2500 fps | 99.9% |
| Norma 203B | <<locked>> | 82% | 56,652 psi | 89% | 2566 fps | 100% |
| Norma 204 | <<locked>> | 90% | 56,086 psi | 88% | 2612 fps | 99.5% |
| Norma 217ᴾ | <<locked>> | 100% | 33,968 psi | 53% | 2356 fps | 96.3% |
| Norma MRP | <<locked>> | 96% | 55,550 psi | 87% | 2690 fps | 100% |
| Norma URP | <<locked>> | 90% | 56,202 psi | 88% | 2602 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 54,389 psi | 85% | 2667 fps | 99.1% |
| Ramshot Hunter | <<locked>> | 90% | 55,245 psi | 87% | 2612 fps | 100% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 52,359 psi | 82% | 2605 fps | 99.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,463 psi | 59% | 1631 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 54,534 psi | 85% | 2536 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 55,753 psi | 87% | 2625 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 54,027 psi | 85% | 2592 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 56,318 psi | 88% | 2671 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 48,008 psi | 75% | 2641 fps | 99.9% |
| Rottweil R 902 | <<locked>> | 82% | 57,450 psi | 90% | 2520 fps | 100% |
| Rottweil R 903 | <<locked>> | 84% | 54,462 psi | 85% | 2523 fps | 100% |
| Rottweil R 904 | <<locked>> | 94% | 56,449 psi | 88% | 2592 fps | 99% |
| Rottweil R 905 | <<locked>> | 96% | 57,551 psi | 90% | 2648 fps | 99.7% |
| Rottweil R 907 | <<locked>> | 88% | 57,305 psi | 90% | 2575 fps | 99.9% |
| Shooters World Long Rifle | <<locked>> | 88% | 55,506 psi | 87% | 2543 fps | 100% |
| Shooters World Precision | <<locked>> | 82% | 55,680 psi | 87% | 2513 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 56,985 psi | 89% | 2585 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 56,420 psi | 88% | 2582 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 55,100 psi | 86% | 2415 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 54,911 psi | 86% | 2503 fps | 99.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 57,072 psi | 89% | 2644 fps | 99.7% |
| Somchem S355 | <<locked>> | 84% | 54,462 psi | 85% | 2523 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 54,433 psi | 85% | 2536 fps | 98.1% |
| Somchem S365 | <<locked>> | 92% | 56,275 psi | 88% | 2602 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 54,302 psi | 85% | 2575 fps | 99.8% |
| Vihtavuori N150 | <<locked>> | 86% | 55,825 psi | 87% | 2497 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 54,694 psi | 86% | 2552 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 57,537 psi | 90% | 2602 fps | 99.9% |
| Vihtavuori N540 | <<locked>> | 82% | 56,405 psi | 88% | 2493 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 57,261 psi | 90% | 2602 fps | 100% |
| Vihtavuori N555 | <<locked>> | 96% | 55,187 psi | 86% | 2615 fps | 100% |
| Vihtavuori N560 | <<locked>> | 96% | 55,637 psi | 87% | 2687 fps | 98.7% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 51,053 psi | 80% | 2605 fps | 98.2% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 54,186 psi | 85% | 2516 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 56,347 psi | 88% | 2625 fps | 100% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 53,113 psi | 83% | 2710 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 54,404 psi | 85% | 2572 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% | 53,055 psi | 83% | 2484 fps | 99.6% |
| Accurate 3100 | <<locked>> | 80% | 29,820 psi | 47% | 2142 fps | 96.1% |
| Accurate 4064 | <<locked>> | 80% | 52,591 psi | 82% | 2461 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 40,712 psi | 64% | 2372 fps | 99.8% |
| Accurate MAGPRO | 78.7 gr | 90% | 43,874 psi | 69% | 2503 fps | 95.6% |
| ADI AR 2208 | <<locked>> | 80% | 49,574 psi | 78% | 2451 fps | 100% |
| ADI AR 2209 | <<locked>> | 82% | 36,825 psi | 58% | 2313 fps | 95.7% |
| ADI AR 2213 | <<locked>> | 88% | 40,118 psi | 63% | 2405 fps | 95.4% |
| ADI AR 2217 | <<locked>> | 98% | 40,857 psi | 64% | 2415 fps | 95.9% |
| ADI AR 2225 | <<locked>> | 94% | 31,720 psi | 50% | 2267 fps | 95.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 50,227 psi | 79% | 2467 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 53,679 psi | 84% | 2533 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 39,508 psi | 62% | 2385 fps | 99.9% |
| Alliant Reloder-17 | <<locked>> | 80% | 45,266 psi | 71% | 2490 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 82% | 36,724 psi | 58% | 2310 fps | 95.8% |
| Alliant Reloder-22 | <<locked>> | 84% | 34,606 psi | 54% | 2306 fps | 95.2% |
| Alliant Reloder-23 | <<locked>> | 80% | 28,921 psi | 45% | 2175 fps | 99% |
| Alliant Reloder-25 | <<locked>> | 82% | 27,035 psi | 42% | 2133 fps | 95.1% |
| Alliant Reloder-26 | <<locked>> | 80% | 31,067 psi | 49% | 2283 fps | 98.1% |
| Baschieri & Pellagri 109 | <<locked>> | 96% | 51,938 psi | 81% | 2539 fps | 95.4% |
| Bofors RP15 | <<locked>> | 88% | 36,651 psi | 57% | 2349 fps | 95.8% |
| Bofors RP3 | <<locked>> | 80% | 50,763 psi | 80% | 2480 fps | 100% |
| Bofors RP30 | <<locked>> | 94% | 36,332 psi | 57% | 2372 fps | 95% |
| Bofors RP5 | <<locked>> | 84% | 34,606 psi | 54% | 2306 fps | 95.2% |
| Bofors RP7 | <<locked>> | 80% | 44,353 psi | 70% | 2382 fps | 98.6% |
| Hodgdon H1000 | <<locked>> | 92% | 36,637 psi | 57% | 2329 fps | 95% |
| Hodgdon H380 | <<locked>> | 80% | 50,995 psi | 80% | 2497 fps | 100% |
| Hodgdon H414 | <<locked>> | 80% | 42,743 psi | 67% | 2421 fps | 98.8% |
| Hodgdon H4350 | <<locked>> | 80% | 45,571 psi | 71% | 2434 fps | 98.4% |
| Hodgdon H4831 | <<locked>> | 88% | 43,004 psi | 67% | 2415 fps | 95.7% |
| Hodgdon H4831 SC | <<locked>> | 88% | 42,105 psi | 66% | 2398 fps | 95.4% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 37,086 psi | 58% | 2283 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 90% | 34,243 psi | 54% | 2362 fps | 95.5% |
| Hodgdon Superformance | <<locked>> | 80% | 41,901 psi | 66% | 2438 fps | 98.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,412 psi | 43% | 1424 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 52,156 psi | 82% | 2477 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 40,059 psi | 63% | 2323 fps | 97.8% |
| IMR 4451 Enduron | <<locked>> | 80% | 45,832 psi | 72% | 2408 fps | 99.2% |
| IMR 4831 | <<locked>> | 80% | 39,073 psi | 61% | 2329 fps | 99.7% |
| IMR 4955 Enduron | <<locked>> | 86% | 42,090 psi | 66% | 2362 fps | 95.6% |
| IMR 7828 SSC | <<locked>> | 90% | 41,089 psi | 64% | 2438 fps | 95.9% |
| Lovex S062 | <<locked>> | 80% | 52,301 psi | 82% | 2470 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 43,265 psi | 68% | 2362 fps | 99.6% |
| Lovex S070 | <<locked>> | 80% | 41,481 psi | 65% | 2352 fps | 98.7% |
| Lovex S071 | <<locked>> | 84% | 29,182 psi | 46% | 2126 fps | 95.8% |
| Norma 203B | <<locked>> | 80% | 52,982 psi | 83% | 2520 fps | 100% |
| Norma 204 | <<locked>> | 80% | 39,697 psi | 62% | 2352 fps | 96.6% |
| Norma 217 | <<locked>> | 98% | 31,821 psi | 50% | 2303 fps | 95.3% |
| Norma MRP | 68.7 gr | 80% | 31,372 psi | 49% | 2257 fps | 95.4% |
| Norma URP | <<locked>> | 80% | 40,437 psi | 63% | 2369 fps | 99.8% |
| Ramshot Grand | <<locked>> | 88% | 37,811 psi | 59% | 2382 fps | 95.1% |
| Ramshot Hunter | <<locked>> | 80% | 39,349 psi | 62% | 2362 fps | 98.8% |
| Ramshot Magnum | <<locked>> | 88% | 33,489 psi | 52% | 2274 fps | 95.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,905 psi | 44% | 1457 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 51,053 psi | 80% | 2490 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 48,109 psi | 75% | 2526 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 40,756 psi | 64% | 2395 fps | 99.8% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 39,262 psi | 62% | 2408 fps | 99.6% |
| ReloadSwiss RS 76 | <<locked>> | 88% | 31,169 psi | 49% | 2280 fps | 95.2% |
| Rottweil R 902 | <<locked>> | 80% | 53,940 psi | 85% | 2477 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 47,819 psi | 75% | 2438 fps | 100% |
| Rottweil R 904 | <<locked>> | 82% | 38,247 psi | 60% | 2297 fps | 95% |
| Rottweil R 905 | <<locked>> | 82% | 35,723 psi | 56% | 2293 fps | 95.7% |
| Rottweil R 907 | <<locked>> | 80% | 44,353 psi | 70% | 2382 fps | 98.6% |
| Shooters World Long Rifle | <<locked>> | 80% | 43,265 psi | 68% | 2362 fps | 99.6% |
| Shooters World Precision | <<locked>> | 80% | 52,301 psi | 82% | 2470 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 41,481 psi | 65% | 2352 fps | 98.7% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 49,342 psi | 77% | 2490 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 48,675 psi | 76% | 2336 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 42,366 psi | 66% | 2316 fps | 98.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 82% | 35,389 psi | 55% | 2287 fps | 95.5% |
| Somchem S355 | <<locked>> | 80% | 47,993 psi | 75% | 2434 fps | 100% |
| Somchem S361 | <<locked>> | 84% | 41,582 psi | 65% | 2336 fps | 95.2% |
| Somchem S365 | <<locked>> | 80% | 37,130 psi | 58% | 2329 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 33,895 psi | 53% | 2228 fps | 95.9% |
| Vihtavuori N150 | <<locked>> | 80% | 45,890 psi | 72% | 2369 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 41,829 psi | 66% | 2365 fps | 99.9% |
| Vihtavuori N165 | <<locked>> | 84% | 33,533 psi | 53% | 2215 fps | 95.3% |
| Vihtavuori N540 | <<locked>> | 80% | 52,866 psi | 83% | 2451 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 41,147 psi | 64% | 2365 fps | 99.7% |
| Vihtavuori N555 | <<locked>> | 80% | 32,198 psi | 50% | 2238 fps | 98.9% |
| Vihtavuori N560 | 75.5 gr | 88% | 41,974 psi | 66% | 2464 fps | 95.7% |
| Vihtavuori N565 | <<locked>> | 94% | 41,350 psi | 65% | 2448 fps | 95.9% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 40,886 psi | 64% | 2333 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 42,917 psi | 67% | 2421 fps | 98.9% |
| Winchester StaBALL HD | <<locked>> | 80% | 25,483 psi | 40% | 2169 fps | 98.9% |
| Winchester Supreme 780 | <<locked>> | 84% | 35,592 psi | 56% | 2264 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 87 powders for .338 Rem. Ultra Mag. loaded with the .338 | 254gr | Peregrine VLR-5. 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 87 of the 87 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 2225, Alliant Reloder-23 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 | Peregrine VLR-5 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.