Load Specifications
Load data in caliber .338 Lapua Mag. with .338 | 280gr | Barnes LRX BT bullet and 71 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-26, Hodgdon Retumbo and ReloadSwiss RS 76.
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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Max Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 94% | 54,723 psi | 90% | 2507 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 52,504 psi | 86% | 2484 fps | 100% |
| Accurate MAGPRO | <<locked>> | 92% | 53,345 psi | 88% | 2598 fps | 98.8% |
| ADI AR 2209 | <<locked>> | 90% | 53,519 psi | 88% | 2543 fps | 99.8% |
| ADI AR 2213 | <<locked>> | 94% | 54,795 psi | 90% | 2598 fps | 99.5% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 49,066 psi | 81% | 2513 fps | 99.1% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 43,598 psi | 72% | 2480 fps | 99.9% |
| Alliant Reloder-16 | <<locked>> | 86% | 53,882 psi | 88% | 2533 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 82% | 54,679 psi | 90% | 2543 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 90% | 53,040 psi | 87% | 2530 fps | 99.8% |
| Alliant Reloder-22 | <<locked>> | 94% | 54,694 psi | 90% | 2592 fps | 99.9% |
| Alliant Reloder-23 | <<locked>> | 94% | 52,402 psi | 86% | 2516 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 98% | 51,590 psi | 85% | 2572 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 90% | 52,257 psi | 86% | 2592 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 94% | 53,084 psi | 87% | 2516 fps | 97.1% |
| Bofors RP15 | <<locked>> | 96% | 53,896 psi | 88% | 2582 fps | 99.9% |
| Bofors RP30ᴾ | <<locked>> | 100% | 51,097 psi | 84% | 2575 fps | 99.5% |
| Bofors RP5 | <<locked>> | 94% | 54,694 psi | 90% | 2592 fps | 99.9% |
| Bofors RP7 | <<locked>> | 82% | 51,793 psi | 85% | 2438 fps | 99.9% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 54,041 psi | 89% | 2589 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 84% | 54,447 psi | 89% | 2536 fps | 100% |
| Hodgdon H4350 | <<locked>> | 82% | 53,519 psi | 88% | 2497 fps | 99.9% |
| Hodgdon H4831 | <<locked>> | 92% | 54,752 psi | 90% | 2543 fps | 99.1% |
| Hodgdon H4831 SC | <<locked>> | 92% | 53,708 psi | 88% | 2530 fps | 99% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 54,070 psi | 89% | 2464 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 54,215 psi | 89% | 2690 fps | 100% |
| Hodgdon Superformance | <<locked>> | 84% | 54,592 psi | 90% | 2569 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,130 psi | 61% | 1552 fps | 100% |
| IMR 4350 | <<locked>> | 86% | 53,301 psi | 88% | 2477 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 82% | 53,200 psi | 87% | 2457 fps | 100% |
| IMR 4831 | <<locked>> | 86% | 52,997 psi | 87% | 2477 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 90% | 52,460 psi | 86% | 2477 fps | 98.9% |
| IMR 7828 SSC | <<locked>> | 94% | 52,692 psi | 87% | 2579 fps | 99.4% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 38,928 psi | 64% | 2392 fps | 97.1% |
| Lovex S065 | <<locked>> | 84% | 53,650 psi | 88% | 2454 fps | 100% |
| Lovex S070 | <<locked>> | 84% | 51,895 psi | 85% | 2454 fps | 100% |
| Lovex S071 | <<locked>> | 98% | 52,170 psi | 86% | 2474 fps | 100% |
| Norma 204 | <<locked>> | 86% | 54,056 psi | 89% | 2526 fps | 99.8% |
| Norma 217ᴾ | <<locked>> | 100% | 39,044 psi | 64% | 2415 fps | 99.1% |
| Norma MRP | <<locked>> | 92% | 54,636 psi | 90% | 2612 fps | 100% |
| Norma URP | <<locked>> | 86% | 54,766 psi | 90% | 2516 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 53,345 psi | 88% | 2598 fps | 99.6% |
| Ramshot Hunter | <<locked>> | 86% | 53,606 psi | 88% | 2526 fps | 100% |
| Ramshot Magnum | <<locked>> | 96% | 51,213 psi | 84% | 2536 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,840 psi | 62% | 1585 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 52,504 psi | 86% | 2507 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 54,679 psi | 90% | 2582 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 54,650 psi | 90% | 2687 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 49,429 psi | 81% | 2589 fps | 98.4% |
| Rottweil R 904 | <<locked>> | 90% | 54,665 psi | 90% | 2513 fps | 99.4% |
| Rottweil R 905 | <<locked>> | 90% | 52,417 psi | 86% | 2520 fps | 99.8% |
| Rottweil R 907 | <<locked>> | 82% | 51,793 psi | 85% | 2438 fps | 99.9% |
| Shooters World Long Rifle | <<locked>> | 84% | 53,650 psi | 88% | 2454 fps | 100% |
| Shooters World SW4350 | <<locked>> | 84% | 51,895 psi | 85% | 2454 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 52,736 psi | 87% | 2415 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 52,011 psi | 85% | 2516 fps | 99.8% |
| Somchem S361 | <<locked>> | 88% | 52,431 psi | 86% | 2461 fps | 98.7% |
| Somchem S365 | <<locked>> | 86% | 51,561 psi | 85% | 2470 fps | 100% |
| Somchem S385 | <<locked>> | 90% | 52,953 psi | 87% | 2497 fps | 100% |
| Vihtavuori N150 | <<locked>> | 82% | 53,722 psi | 88% | 2402 fps | 100% |
| Vihtavuori N160 | <<locked>> | 84% | 53,069 psi | 87% | 2461 fps | 100% |
| Vihtavuori N165 | <<locked>> | 94% | 52,576 psi | 86% | 2484 fps | 99.9% |
| Vihtavuori N550 | <<locked>> | 84% | 52,054 psi | 85% | 2467 fps | 100% |
| Vihtavuori N555 | <<locked>> | 92% | 54,549 psi | 90% | 2536 fps | 100% |
| Vihtavuori N560 | <<locked>> | 92% | 54,549 psi | 90% | 2612 fps | 99.3% |
| Vihtavuori N565 | <<locked>> | 98% | 54,070 psi | 89% | 2595 fps | 99.4% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 50,734 psi | 83% | 2595 fps | 98.1% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 52,373 psi | 86% | 2428 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 54,447 psi | 89% | 2536 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 96% | 53,476 psi | 88% | 2635 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 52,605 psi | 86% | 2493 fps | 99.7% |
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% | 33,924 psi | 56% | 2172 fps | 98.6% |
| Accurate 4350 | <<locked>> | 80% | 45,788 psi | 75% | 2388 fps | 100% |
| Accurate MAGPRO | <<locked>> | 84% | 40,074 psi | 66% | 2375 fps | 95.8% |
| ADI AR 2209 | <<locked>> | 80% | 38,290 psi | 63% | 2287 fps | 97.5% |
| ADI AR 2213 | <<locked>> | 82% | 36,376 psi | 60% | 2277 fps | 95.6% |
| ADI AR 2217 | <<locked>> | 90% | 35,041 psi | 58% | 2251 fps | 95.3% |
| ADI AR 2225 | <<locked>> | 88% | 29,341 psi | 48% | 2162 fps | 96.1% |
| Alliant Reloder-16 | <<locked>> | 80% | 44,179 psi | 73% | 2395 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 80% | 50,923 psi | 84% | 2493 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 38,319 psi | 63% | 2283 fps | 97.6% |
| Alliant Reloder-22 | <<locked>> | 80% | 33,982 psi | 56% | 2231 fps | 96.3% |
| Alliant Reloder-23 | <<locked>> | 80% | 32,764 psi | 54% | 2198 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 28,384 psi | 47% | 2123 fps | 97.5% |
| Alliant Reloder-26 | 73.7 gr | 80% | 35,708 psi | 59% | 2323 fps | 99.8% |
| Baschieri & Pellagri 109 | <<locked>> | 90% | 46,891 psi | 77% | 2415 fps | 95.6% |
| Bofors RP15 | <<locked>> | 80% | 31,604 psi | 52% | 2178 fps | 95.2% |
| Bofors RP30 | <<locked>> | 88% | 33,779 psi | 55% | 2260 fps | 95.4% |
| Bofors RP5 | <<locked>> | 80% | 33,982 psi | 56% | 2231 fps | 96.3% |
| Bofors RP7 | <<locked>> | 80% | 48,559 psi | 80% | 2392 fps | 99.8% |
| Hodgdon H1000 | <<locked>> | 86% | 33,417 psi | 55% | 2215 fps | 95.3% |
| Hodgdon H414 | <<locked>> | 80% | 47,485 psi | 78% | 2434 fps | 99.9% |
| Hodgdon H4350 | <<locked>> | 80% | 50,212 psi | 82% | 2448 fps | 99.7% |
| Hodgdon H4831 | <<locked>> | 82% | 38,928 psi | 64% | 2283 fps | 95.8% |
| Hodgdon H4831 SC | <<locked>> | 82% | 38,174 psi | 63% | 2270 fps | 95.6% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 41,466 psi | 68% | 2290 fps | 100% |
| Hodgdon Retumbo | 72.4 gr | 84% | 31,662 psi | 52% | 2247 fps | 95.9% |
| Hodgdon Superformance | <<locked>> | 80% | 47,094 psi | 77% | 2464 fps | 99.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,760 psi | 46% | 1381 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 44,092 psi | 72% | 2336 fps | 99.4% |
| IMR 4451 Enduron | <<locked>> | 80% | 49,951 psi | 82% | 2411 fps | 99.9% |
| IMR 4831 | <<locked>> | 80% | 43,555 psi | 72% | 2339 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 38,203 psi | 63% | 2234 fps | 95.7% |
| IMR 7828 SSC | <<locked>> | 82% | 35,041 psi | 58% | 2260 fps | 95.1% |
| IMR 8133 Enduron | <<locked>> | 96% | 34,171 psi | 56% | 2287 fps | 95.3% |
| Lovex S065 | <<locked>> | 80% | 47,485 psi | 78% | 2369 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 45,687 psi | 75% | 2359 fps | 99.8% |
| Lovex S071 | <<locked>> | 80% | 29,037 psi | 48% | 2064 fps | 97% |
| Norma 204 | <<locked>> | 80% | 44,034 psi | 72% | 2372 fps | 98.6% |
| Norma 217 | <<locked>> | 92% | 29,776 psi | 49% | 2201 fps | 95.8% |
| Norma MRP | <<locked>> | 80% | 35,476 psi | 58% | 2290 fps | 98.2% |
| Norma URP | <<locked>> | 80% | 44,991 psi | 74% | 2375 fps | 100% |
| Ramshot Grand | <<locked>> | 82% | 34,418 psi | 56% | 2260 fps | 95.3% |
| Ramshot Hunter | <<locked>> | 80% | 43,845 psi | 72% | 2379 fps | 99.9% |
| Ramshot Magnum | <<locked>> | 82% | 30,530 psi | 50% | 2156 fps | 95.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,297 psi | 46% | 1414 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 45,672 psi | 75% | 2408 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 43,990 psi | 72% | 2428 fps | 100% |
| ReloadSwiss RS 76 | 75.6 gr | 82% | 28,442 psi | 47% | 2162 fps | 95.4% |
| ReloadSwiss RS 80 | <<locked>> | 94% | 39,334 psi | 65% | 2411 fps | 95.8% |
| Rottweil R 904 | <<locked>> | 80% | 39,653 psi | 65% | 2270 fps | 96.8% |
| Rottweil R 905 | <<locked>> | 80% | 37,478 psi | 62% | 2267 fps | 97.5% |
| Rottweil R 907 | <<locked>> | 80% | 48,559 psi | 80% | 2392 fps | 99.8% |
| Shooters World Long Rifle | <<locked>> | 80% | 47,485 psi | 78% | 2369 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 45,687 psi | 75% | 2359 fps | 99.8% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 46,354 psi | 76% | 2323 fps | 99.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 37,159 psi | 61% | 2264 fps | 97.4% |
| Somchem S361 | <<locked>> | 80% | 40,118 psi | 66% | 2260 fps | 96.1% |
| Somchem S365 | <<locked>> | 80% | 42,032 psi | 69% | 2336 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 38,000 psi | 62% | 2254 fps | 98.3% |
| Vihtavuori N150 | <<locked>> | 80% | 50,372 psi | 83% | 2359 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 46,557 psi | 76% | 2372 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 32,938 psi | 54% | 2146 fps | 96.5% |
| Vihtavuori N550 | <<locked>> | 80% | 45,643 psi | 75% | 2372 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 36,637 psi | 60% | 2260 fps | 100% |
| Vihtavuori N560 | <<locked>> | 82% | 38,377 psi | 63% | 2339 fps | 95.9% |
| Vihtavuori N565 | <<locked>> | 86% | 35,737 psi | 59% | 2277 fps | 95.3% |
| Vihtavuori N568 | <<locked>> | 94% | 40,930 psi | 67% | 2425 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 45,556 psi | 75% | 2336 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 47,674 psi | 78% | 2438 fps | 99.9% |
| Winchester StaBALL HD | <<locked>> | 80% | 28,892 psi | 47% | 2221 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 34,635 psi | 57% | 2188 fps | 96.4% |
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 76 powders for .338 Lapua Mag. loaded with the .338 | 280gr | Barnes LRX BT. Hodgdon Retumbo delivers the highest muzzle velocity at 2,690 fps; across all powders the maximum-charge window runs from 1,552 fps to 2,690 fps. ADI AR 2217 gives the best case fill at 100 %, and 76 of the 76 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (420 MPa), the top charges use 61–90 %, leaving at least 10 % headroom. The 280.0 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 2218, 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. Alliant Reloder-26, Hodgdon Retumbo, ReloadSwiss RS 76 rank at the top here: for .338 Lapua Mag. with the .338 | 280gr | Barnes LRX BT they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, ADI AR 2218, IMR 7977 Enduron burn incompletely and react more sensitively to barrel length and temperature. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.