Load Specifications
Load data in caliber .338 Lapua Mag. with .338 | 285gr | Barnes TAC-X bullet and 71 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Hodgdon Retumbo, ReloadSwiss RS 76 and Winchester StaBALL HD.
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>> | 92% | 52,272 psi | 86% | 2454 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 53,664 psi | 88% | 2477 fps | 100% |
| Accurate MAGPRO | <<locked>> | 92% | 51,692 psi | 85% | 2549 fps | 98.2% |
| ADI AR 2209 | <<locked>> | 90% | 54,795 psi | 90% | 2539 fps | 99.9% |
| ADI AR 2213 | <<locked>> | 92% | 52,460 psi | 86% | 2546 fps | 99.4% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 50,256 psi | 83% | 2516 fps | 99.4% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 44,686 psi | 73% | 2484 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 86% | 55,042 psi | 90% | 2526 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 90% | 54,288 psi | 89% | 2530 fps | 99.9% |
| Alliant Reloder-22 | <<locked>> | 92% | 52,504 psi | 86% | 2543 fps | 99.9% |
| Alliant Reloder-23 | <<locked>> | 94% | 53,824 psi | 88% | 2510 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 98% | 52,968 psi | 87% | 2569 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 90% | 53,795 psi | 88% | 2589 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 94% | 54,215 psi | 89% | 2516 fps | 97.6% |
| Bofors RP15 | <<locked>> | 94% | 51,750 psi | 85% | 2530 fps | 99.8% |
| Bofors RP30ᴾ | <<locked>> | 100% | 52,504 psi | 86% | 2575 fps | 99.7% |
| Bofors RP5 | <<locked>> | 92% | 52,504 psi | 86% | 2543 fps | 99.9% |
| Bofors RP7 | <<locked>> | 82% | 52,750 psi | 87% | 2434 fps | 100% |
| Hodgdon H1000 | <<locked>> | 98% | 51,706 psi | 85% | 2536 fps | 99.8% |
| Hodgdon H414 | <<locked>> | 82% | 51,909 psi | 85% | 2480 fps | 100% |
| Hodgdon H4350 | <<locked>> | 82% | 54,708 psi | 90% | 2493 fps | 100% |
| Hodgdon H4831 | <<locked>> | 90% | 52,243 psi | 86% | 2490 fps | 98.9% |
| Hodgdon H4831 SC | <<locked>> | 92% | 54,926 psi | 90% | 2526 fps | 99.2% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 51,677 psi | 85% | 2415 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 98% | 52,054 psi | 85% | 2638 fps | 100% |
| Hodgdon Superformance | <<locked>> | 82% | 52,025 psi | 85% | 2516 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,188 psi | 61% | 1539 fps | 100% |
| IMR 4350 | <<locked>> | 86% | 54,288 psi | 89% | 2470 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 82% | 54,128 psi | 89% | 2454 fps | 100% |
| IMR 4831 | <<locked>> | 86% | 54,317 psi | 89% | 2474 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 90% | 53,563 psi | 88% | 2477 fps | 99.2% |
| IMR 7828 SSC | <<locked>> | 94% | 54,056 psi | 89% | 2579 fps | 99.6% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 40,059 psi | 66% | 2395 fps | 97.7% |
| Lovex S065 | <<locked>> | 84% | 54,665 psi | 90% | 2448 fps | 100% |
| Lovex S070 | <<locked>> | 84% | 52,881 psi | 87% | 2451 fps | 100% |
| Lovex S071 | <<locked>> | 98% | 53,519 psi | 88% | 2474 fps | 100% |
| Norma 204 | <<locked>> | 84% | 51,663 psi | 85% | 2474 fps | 99.7% |
| Norma 217ᴾ | <<locked>> | 100% | 40,248 psi | 66% | 2421 fps | 99.4% |
| Norma MRP | <<locked>> | 90% | 52,257 psi | 86% | 2559 fps | 100% |
| Norma URP | <<locked>> | 84% | 52,388 psi | 86% | 2464 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 54,795 psi | 90% | 2598 fps | 99.8% |
| Ramshot Hunter | <<locked>> | 86% | 54,868 psi | 90% | 2523 fps | 100% |
| Ramshot Magnum | <<locked>> | 96% | 52,895 psi | 87% | 2539 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,913 psi | 62% | 1575 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 53,824 psi | 88% | 2500 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 84% | 52,098 psi | 86% | 2526 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 52,141 psi | 86% | 2631 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 50,879 psi | 84% | 2595 fps | 98.8% |
| Rottweil R 904 | <<locked>> | 88% | 52,431 psi | 86% | 2464 fps | 99.4% |
| Rottweil R 905 | <<locked>> | 90% | 53,751 psi | 88% | 2520 fps | 99.9% |
| Rottweil R 907 | <<locked>> | 82% | 52,750 psi | 87% | 2434 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 84% | 54,665 psi | 90% | 2448 fps | 100% |
| Shooters World SW4350 | <<locked>> | 84% | 52,881 psi | 87% | 2451 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 53,853 psi | 88% | 2411 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 53,345 psi | 88% | 2516 fps | 99.9% |
| Somchem S361 | <<locked>> | 88% | 53,548 psi | 88% | 2457 fps | 99% |
| Somchem S365 | <<locked>> | 86% | 52,779 psi | 87% | 2464 fps | 100% |
| Somchem S385 | <<locked>> | 90% | 54,012 psi | 89% | 2493 fps | 100% |
| Vihtavuori N150 | <<locked>> | 82% | 54,737 psi | 90% | 2395 fps | 100% |
| Vihtavuori N160 | <<locked>> | 84% | 54,114 psi | 89% | 2457 fps | 100% |
| Vihtavuori N165 | <<locked>> | 94% | 53,621 psi | 88% | 2477 fps | 100% |
| Vihtavuori N550 | <<locked>> | 84% | 53,243 psi | 87% | 2464 fps | 100% |
| Vihtavuori N555 | <<locked>> | 90% | 52,446 psi | 86% | 2487 fps | 100% |
| Vihtavuori N560 | <<locked>> | 90% | 52,170 psi | 86% | 2559 fps | 99.2% |
| Vihtavuori N565 | <<locked>> | 96% | 51,750 psi | 85% | 2543 fps | 99.2% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 52,127 psi | 86% | 2595 fps | 98.5% |
| Vihtavuori N570ᴾ | <<locked>> | 100% | 49,342 psi | 81% | 2589 fps | 96.3% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 53,359 psi | 88% | 2418 fps | 100% |
| Winchester 760 | <<locked>> | 82% | 52,112 psi | 86% | 2484 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 94% | 51,387 psi | 84% | 2585 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 53,867 psi | 88% | 2490 fps | 99.9% |
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% | 34,795 psi | 57% | 2172 fps | 98.9% |
| Accurate 4350 | <<locked>> | 80% | 46,876 psi | 77% | 2382 fps | 100% |
| Accurate MAGPRO | <<locked>> | 86% | 41,785 psi | 69% | 2385 fps | 95.9% |
| ADI AR 2209 | <<locked>> | 80% | 39,160 psi | 64% | 2287 fps | 98% |
| ADI AR 2213 | <<locked>> | 80% | 34,809 psi | 57% | 2224 fps | 95.2% |
| ADI AR 2217 | <<locked>> | 90% | 35,810 psi | 59% | 2251 fps | 96% |
| ADI AR 2225 | <<locked>> | 86% | 28,166 psi | 46% | 2113 fps | 95.7% |
| Alliant Reloder-16 | <<locked>> | 80% | 45,208 psi | 74% | 2392 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 39,189 psi | 64% | 2283 fps | 98% |
| Alliant Reloder-22 | <<locked>> | 80% | 34,853 psi | 57% | 2234 fps | 96.9% |
| Alliant Reloder-23 | <<locked>> | 80% | 33,649 psi | 55% | 2198 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 29,095 psi | 48% | 2126 fps | 98% |
| Alliant Reloder-26 | <<locked>> | 80% | 36,738 psi | 60% | 2323 fps | 99.9% |
| Baschieri & Pellagri 109 | <<locked>> | 88% | 44,947 psi | 74% | 2365 fps | 95.3% |
| Bofors RP15 | <<locked>> | 80% | 32,430 psi | 53% | 2178 fps | 95.8% |
| Bofors RP30 | <<locked>> | 86% | 32,401 psi | 53% | 2211 fps | 95.1% |
| Bofors RP5 | <<locked>> | 80% | 34,853 psi | 57% | 2234 fps | 96.9% |
| Bofors RP7 | <<locked>> | 80% | 49,487 psi | 81% | 2385 fps | 99.9% |
| Hodgdon H1000 | <<locked>> | 86% | 34,272 psi | 56% | 2221 fps | 96.1% |
| Hodgdon H414 | <<locked>> | 80% | 48,675 psi | 80% | 2434 fps | 100% |
| Hodgdon H4350 | <<locked>> | 80% | 51,184 psi | 84% | 2444 fps | 99.8% |
| Hodgdon H4831 | <<locked>> | 80% | 37,217 psi | 61% | 2234 fps | 95.5% |
| Hodgdon H4831 SC | <<locked>> | 80% | 36,492 psi | 60% | 2218 fps | 95.2% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 42,453 psi | 70% | 2287 fps | 100% |
| Hodgdon Retumbo | 71.2 gr | 82% | 30,385 psi | 50% | 2198 fps | 95.6% |
| Hodgdon Superformance | <<locked>> | 80% | 48,327 psi | 79% | 2461 fps | 99.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,876 psi | 46% | 1375 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 44,976 psi | 74% | 2333 fps | 99.6% |
| IMR 4451 Enduron | <<locked>> | 80% | 50,865 psi | 84% | 2408 fps | 100% |
| IMR 4831 | <<locked>> | 80% | 44,541 psi | 73% | 2336 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 38,957 psi | 64% | 2234 fps | 96.3% |
| IMR 7828 SSC | <<locked>> | 82% | 35,853 psi | 59% | 2260 fps | 95.8% |
| IMR 8133 Enduron | <<locked>> | 94% | 32,909 psi | 54% | 2241 fps | 95% |
| Lovex S065 | <<locked>> | 80% | 48,414 psi | 79% | 2362 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 46,615 psi | 77% | 2356 fps | 99.9% |
| Lovex S071 | <<locked>> | 80% | 29,834 psi | 49% | 2064 fps | 97.6% |
| Norma 204 | <<locked>> | 80% | 45,005 psi | 74% | 2372 fps | 99% |
| Norma 217 | <<locked>> | 90% | 28,703 psi | 47% | 2156 fps | 95.5% |
| Norma MRP | <<locked>> | 80% | 36,550 psi | 60% | 2293 fps | 98.6% |
| Norma URP | <<locked>> | 80% | 45,992 psi | 76% | 2372 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 32,924 psi | 54% | 2208 fps | 95% |
| Ramshot Hunter | <<locked>> | 80% | 44,788 psi | 74% | 2375 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 29,124 psi | 48% | 2106 fps | 95.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,427 psi | 47% | 1407 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 46,905 psi | 77% | 2408 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 45,194 psi | 74% | 2425 fps | 100% |
| ReloadSwiss RS 76 | 76.2 gr | 82% | 29,225 psi | 48% | 2172 fps | 96.3% |
| ReloadSwiss RS 80 | <<locked>> | 92% | 37,536 psi | 62% | 2356 fps | 95.4% |
| Rottweil R 904 | <<locked>> | 80% | 40,480 psi | 66% | 2267 fps | 97.3% |
| Rottweil R 905 | <<locked>> | 80% | 38,392 psi | 63% | 2270 fps | 98% |
| Rottweil R 907 | <<locked>> | 80% | 49,487 psi | 81% | 2385 fps | 99.9% |
| Shooters World Long Rifle | <<locked>> | 80% | 48,414 psi | 79% | 2362 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 46,615 psi | 77% | 2356 fps | 99.9% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 47,224 psi | 78% | 2320 fps | 99.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 38,072 psi | 63% | 2264 fps | 97.9% |
| Somchem S361 | <<locked>> | 80% | 41,060 psi | 67% | 2260 fps | 96.7% |
| Somchem S365 | <<locked>> | 80% | 43,105 psi | 71% | 2333 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 38,885 psi | 64% | 2254 fps | 98.7% |
| Vihtavuori N150 | <<locked>> | 80% | 51,358 psi | 84% | 2352 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 47,543 psi | 78% | 2369 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 33,736 psi | 55% | 2146 fps | 97% |
| Vihtavuori N550 | <<locked>> | 80% | 46,775 psi | 77% | 2372 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 37,623 psi | 62% | 2260 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 36,753 psi | 60% | 2287 fps | 95.6% |
| Vihtavuori N565 | <<locked>> | 84% | 34,301 psi | 56% | 2228 fps | 95% |
| Vihtavuori N568 | <<locked>> | 92% | 39,218 psi | 64% | 2375 fps | 95.3% |
| Vihtavuori N570 | <<locked>> | 98% | 45,934 psi | 75% | 2530 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 46,485 psi | 76% | 2329 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 48,675 psi | 80% | 2434 fps | 100% |
| Winchester StaBALL HD | 71.3 gr | 80% | 29,675 psi | 49% | 2224 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 35,462 psi | 58% | 2188 fps | 97% |
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 78 powders for .338 Lapua Mag. loaded with the .338 | 285gr | Barnes TAC-X. Hodgdon Retumbo delivers the highest muzzle velocity at 2,638 fps; across all powders the maximum-charge window runs from 1,539 fps to 2,638 fps. ADI AR 2217 gives the best case fill at 100 %, and 78 of the 78 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 285.0 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. Hodgdon Retumbo, ReloadSwiss RS 76, Winchester StaBALL HD rank at the top here: for .338 Lapua Mag. with the .338 | 285gr | Barnes TAC-X they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, ADI AR 2218, Alliant Reloder-50, 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.