Load Specifications
Load data in caliber .338 Lapua Mag. with .338 | 277gr | CutEdge MTAC bullet and 72 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Accurate MAGPRO, Alliant Reloder-26 and Hodgdon Retumbo.
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% | 54,186 psi | 89% | 2513 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 52,040 psi | 85% | 2490 fps | 100% |
| Accurate MAGPRO | <<locked>> | 92% | 52,997 psi | 87% | 2608 fps | 98.6% |
| ADI AR 2209 | <<locked>> | 90% | 53,055 psi | 87% | 2549 fps | 99.8% |
| ADI AR 2213 | <<locked>> | 94% | 54,476 psi | 89% | 2608 fps | 99.4% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 48,559 psi | 80% | 2516 fps | 99% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 43,120 psi | 71% | 2487 fps | 99.9% |
| Alliant Power Pro Varmint | <<locked>> | 90% | 53,432 psi | 88% | 2549 fps | 99.8% |
| Alliant Reloder-16 | <<locked>> | 86% | 53,403 psi | 88% | 2543 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 82% | 54,172 psi | 89% | 2549 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 90% | 52,765 psi | 87% | 2543 fps | 99.7% |
| Alliant Reloder-22 | <<locked>> | 94% | 54,375 psi | 89% | 2602 fps | 99.9% |
| Alliant Reloder-23 | <<locked>> | 94% | 51,909 psi | 85% | 2523 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 54,781 psi | 90% | 2628 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 90% | 51,909 psi | 85% | 2602 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 94% | 52,837 psi | 87% | 2526 fps | 96.9% |
| Bofors RP15 | <<locked>> | 96% | 53,374 psi | 88% | 2589 fps | 99.8% |
| Bofors RP30ᴾ | <<locked>> | 100% | 50,720 psi | 83% | 2582 fps | 99.4% |
| Bofors RP5 | <<locked>> | 94% | 54,375 psi | 89% | 2602 fps | 99.9% |
| Bofors RP7 | <<locked>> | 84% | 54,810 psi | 90% | 2493 fps | 100% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 53,722 psi | 88% | 2595 fps | 99.8% |
| Hodgdon H414 | <<locked>> | 84% | 53,998 psi | 89% | 2543 fps | 100% |
| Hodgdon H4350 | <<locked>> | 82% | 53,301 psi | 88% | 2507 fps | 99.8% |
| Hodgdon H4831 | <<locked>> | 92% | 54,476 psi | 89% | 2552 fps | 99% |
| Hodgdon H4831 SC | <<locked>> | 92% | 53,229 psi | 87% | 2533 fps | 98.8% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 53,592 psi | 88% | 2474 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 53,664 psi | 88% | 2697 fps | 100% |
| Hodgdon Superformance | <<locked>> | 84% | 54,288 psi | 89% | 2579 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,014 psi | 61% | 1558 fps | 100% |
| IMR 4350 | <<locked>> | 86% | 52,910 psi | 87% | 2484 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 82% | 53,026 psi | 87% | 2470 fps | 100% |
| IMR 4831 | <<locked>> | 86% | 52,794 psi | 87% | 2487 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 90% | 52,054 psi | 85% | 2487 fps | 98.8% |
| IMR 7828 SSC | <<locked>> | 94% | 52,402 psi | 86% | 2589 fps | 99.3% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 38,667 psi | 63% | 2398 fps | 96.9% |
| Lovex S065 | <<locked>> | 84% | 53,301 psi | 88% | 2464 fps | 100% |
| Lovex S070 | <<locked>> | 86% | 54,868 psi | 90% | 2510 fps | 100% |
| Lovex S071 | <<locked>> | 98% | 51,909 psi | 85% | 2484 fps | 100% |
| Norma 204 | <<locked>> | 86% | 53,606 psi | 88% | 2533 fps | 99.7% |
| Norma 217ᴾ | <<locked>> | 100% | 38,595 psi | 63% | 2418 fps | 98.9% |
| Norma MRP | <<locked>> | 92% | 54,085 psi | 89% | 2618 fps | 100% |
| Norma URP | <<locked>> | 86% | 54,302 psi | 89% | 2523 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 52,794 psi | 87% | 2605 fps | 99.5% |
| Ramshot Hunter | <<locked>> | 86% | 53,127 psi | 87% | 2533 fps | 100% |
| Ramshot Magnum | <<locked>> | 98% | 54,868 psi | 90% | 2598 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,898 psi | 62% | 1594 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 52,228 psi | 86% | 2516 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 54,172 psi | 89% | 2589 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 54,201 psi | 89% | 2694 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 48,834 psi | 80% | 2595 fps | 98.2% |
| Rottweil R 904 | <<locked>> | 90% | 54,433 psi | 89% | 2523 fps | 99.4% |
| Rottweil R 905 | <<locked>> | 90% | 52,156 psi | 86% | 2530 fps | 99.8% |
| Rottweil R 907 | <<locked>> | 84% | 54,810 psi | 90% | 2493 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 84% | 53,301 psi | 88% | 2464 fps | 100% |
| Shooters World SW4350 | <<locked>> | 86% | 54,868 psi | 90% | 2510 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 52,547 psi | 86% | 2428 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 51,750 psi | 85% | 2526 fps | 99.7% |
| Somchem S361 | <<locked>> | 88% | 52,185 psi | 86% | 2467 fps | 98.6% |
| Somchem S365 | <<locked>> | 88% | 54,679 psi | 90% | 2523 fps | 100% |
| Somchem S385 | <<locked>> | 90% | 52,504 psi | 86% | 2503 fps | 100% |
| Vihtavuori N150 | <<locked>> | 82% | 53,374 psi | 88% | 2411 fps | 100% |
| Vihtavuori N160 | <<locked>> | 84% | 52,620 psi | 86% | 2470 fps | 100% |
| Vihtavuori N165 | <<locked>> | 94% | 52,083 psi | 86% | 2490 fps | 99.9% |
| Vihtavuori N550 | <<locked>> | 84% | 51,808 psi | 85% | 2477 fps | 100% |
| Vihtavuori N555 | <<locked>> | 92% | 54,041 psi | 89% | 2546 fps | 100% |
| Vihtavuori N560 | <<locked>> | 92% | 53,998 psi | 89% | 2618 fps | 99.2% |
| Vihtavuori N565 | <<locked>> | 98% | 53,505 psi | 88% | 2598 fps | 99.2% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 50,328 psi | 83% | 2602 fps | 97.9% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 51,924 psi | 85% | 2438 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 54,201 psi | 89% | 2546 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 96% | 53,026 psi | 87% | 2644 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 52,344 psi | 86% | 2500 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% | 33,605 psi | 55% | 2178 fps | 98.4% |
| Accurate 4350 | <<locked>> | 80% | 45,426 psi | 75% | 2395 fps | 100% |
| Accurate MAGPRO | 76.7 gr | 84% | 39,856 psi | 65% | 2385 fps | 95.6% |
| ADI AR 2209 | <<locked>> | 80% | 37,971 psi | 62% | 2293 fps | 97.3% |
| ADI AR 2213 | <<locked>> | 82% | 36,201 psi | 59% | 2287 fps | 95.3% |
| ADI AR 2217 | <<locked>> | 90% | 34,737 psi | 57% | 2254 fps | 95% |
| ADI AR 2225 | <<locked>> | 88% | 29,182 psi | 48% | 2165 fps | 95.8% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 38,377 psi | 63% | 2297 fps | 97.4% |
| Alliant Reloder-16 | <<locked>> | 80% | 43,801 psi | 72% | 2405 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 80% | 50,473 psi | 83% | 2503 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 38,029 psi | 62% | 2290 fps | 97.4% |
| Alliant Reloder-22 | <<locked>> | 80% | 33,663 psi | 55% | 2238 fps | 96.1% |
| Alliant Reloder-23 | <<locked>> | 80% | 32,445 psi | 53% | 2205 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 28,152 psi | 46% | 2129 fps | 97.2% |
| Alliant Reloder-26 | 73.8 gr | 80% | 35,331 psi | 58% | 2329 fps | 99.7% |
| Baschieri & Pellagri 109 | <<locked>> | 90% | 46,717 psi | 77% | 2425 fps | 95.4% |
| Bofors RP15 | <<locked>> | 82% | 33,489 psi | 55% | 2234 fps | 95.9% |
| Bofors RP30 | <<locked>> | 88% | 33,431 psi | 55% | 2264 fps | 95.1% |
| Bofors RP5 | <<locked>> | 80% | 33,663 psi | 55% | 2238 fps | 96.1% |
| Bofors RP7 | <<locked>> | 80% | 48,225 psi | 79% | 2398 fps | 99.7% |
| Hodgdon H1000 | <<locked>> | 86% | 33,243 psi | 55% | 2221 fps | 95% |
| Hodgdon H414 | <<locked>> | 80% | 47,297 psi | 78% | 2444 fps | 99.9% |
| Hodgdon H4350 | <<locked>> | 80% | 49,835 psi | 82% | 2454 fps | 99.6% |
| Hodgdon H4831 | <<locked>> | 82% | 38,595 psi | 63% | 2290 fps | 95.6% |
| Hodgdon H4831 SC | <<locked>> | 82% | 37,985 psi | 62% | 2277 fps | 95.3% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 41,118 psi | 68% | 2297 fps | 100% |
| Hodgdon Retumbo | 72.5 gr | 84% | 31,372 psi | 52% | 2251 fps | 95.6% |
| Hodgdon Superformance | <<locked>> | 80% | 46,659 psi | 77% | 2467 fps | 99.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,659 psi | 45% | 1388 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 43,758 psi | 72% | 2343 fps | 99.3% |
| IMR 4451 Enduron | <<locked>> | 80% | 49,835 psi | 82% | 2425 fps | 99.9% |
| IMR 4831 | <<locked>> | 80% | 43,192 psi | 71% | 2349 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 37,913 psi | 62% | 2241 fps | 95.5% |
| IMR 7828 SSC | <<locked>> | 84% | 37,144 psi | 61% | 2320 fps | 95.9% |
| IMR 8133 Enduron | <<locked>> | 96% | 33,779 psi | 55% | 2290 fps | 95% |
| Lovex S065 | <<locked>> | 80% | 47,181 psi | 77% | 2375 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 45,368 psi | 74% | 2369 fps | 99.8% |
| Lovex S071 | <<locked>> | 80% | 28,776 psi | 47% | 2067 fps | 96.8% |
| Norma 204 | <<locked>> | 80% | 43,700 psi | 72% | 2379 fps | 98.5% |
| Norma 217 | <<locked>> | 92% | 29,559 psi | 49% | 2208 fps | 95.5% |
| Norma MRP | <<locked>> | 80% | 35,259 psi | 58% | 2300 fps | 98% |
| Norma URP | <<locked>> | 80% | 44,643 psi | 73% | 2385 fps | 100% |
| Ramshot Grand | <<locked>> | 82% | 34,084 psi | 56% | 2264 fps | 95% |
| Ramshot Hunter | <<locked>> | 80% | 43,497 psi | 71% | 2385 fps | 99.8% |
| Ramshot Magnum | <<locked>> | 82% | 30,240 psi | 50% | 2159 fps | 95.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,355 psi | 47% | 1424 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 45,455 psi | 75% | 2418 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 43,743 psi | 72% | 2438 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 82% | 28,268 psi | 46% | 2169 fps | 95.1% |
| ReloadSwiss RS 80 | <<locked>> | 94% | 38,885 psi | 64% | 2415 fps | 95.4% |
| Rottweil R 904 | <<locked>> | 80% | 39,334 psi | 65% | 2277 fps | 96.6% |
| Rottweil R 905 | <<locked>> | 80% | 37,304 psi | 61% | 2277 fps | 97.4% |
| Rottweil R 907 | <<locked>> | 80% | 48,225 psi | 79% | 2398 fps | 99.7% |
| Shooters World Long Rifle | <<locked>> | 80% | 47,181 psi | 77% | 2375 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 45,368 psi | 74% | 2369 fps | 99.8% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 46,021 psi | 76% | 2329 fps | 99.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 36,985 psi | 61% | 2274 fps | 97.2% |
| Somchem S361 | <<locked>> | 80% | 39,943 psi | 66% | 2267 fps | 95.9% |
| Somchem S365 | <<locked>> | 80% | 41,626 psi | 68% | 2346 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 37,666 psi | 62% | 2260 fps | 98.1% |
| Vihtavuori N150 | <<locked>> | 80% | 50,024 psi | 82% | 2369 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 46,195 psi | 76% | 2379 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 32,648 psi | 54% | 2152 fps | 96.3% |
| Vihtavuori N550 | <<locked>> | 80% | 45,440 psi | 75% | 2385 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 36,318 psi | 60% | 2267 fps | 99.9% |
| Vihtavuori N560 | <<locked>> | 82% | 38,145 psi | 63% | 2346 fps | 95.7% |
| Vihtavuori N565 | <<locked>> | 86% | 35,346 psi | 58% | 2283 fps | 95% |
| Vihtavuori N568 | <<locked>> | 94% | 40,466 psi | 66% | 2428 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 45,165 psi | 74% | 2346 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 47,297 psi | 78% | 2444 fps | 99.9% |
| Winchester StaBALL HD | <<locked>> | 80% | 28,601 psi | 47% | 2224 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 34,345 psi | 56% | 2192 fps | 96.2% |
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 72 powders for .338 Lapua Mag. loaded with the .338 | 277gr | CutEdge MTAC. Hodgdon Retumbo delivers the highest muzzle velocity at 2,697 fps; across all powders the maximum-charge window runs from 1,558 fps to 2,697 fps. ADI AR 2217 gives the best case fill at 100 %, and 72 of the 72 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 277.0 gr projectile in 0.338" calls for a 1:10.0 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. Accurate MAGPRO, Alliant Reloder-26, Hodgdon Retumbo rank at the top here: for .338 Lapua Mag. with the .338 | 277gr | 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.