Load Specifications
Load data in caliber .338 Lapua Mag. with .338 | 285gr | Hornady A-MAX bullet and 69 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 Vihtavuori N560.
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% | 54,259 psi | 89% | 2477 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 51,895 psi | 85% | 2448 fps | 100% |
| Accurate MAGPRO | <<locked>> | 90% | 52,547 psi | 86% | 2566 fps | 98.8% |
| ADI AR 2209 | <<locked>> | 88% | 52,576 psi | 86% | 2507 fps | 99.8% |
| ADI AR 2213 | <<locked>> | 92% | 53,751 psi | 88% | 2562 fps | 99.6% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 51,750 psi | 85% | 2536 fps | 99.6% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 46,253 psi | 76% | 2507 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 84% | 52,866 psi | 87% | 2497 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 52,214 psi | 86% | 2497 fps | 99.8% |
| Alliant Reloder-22 | <<locked>> | 92% | 53,983 psi | 89% | 2559 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 92% | 51,895 psi | 85% | 2484 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 98% | 54,650 psi | 90% | 2589 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 88% | 51,735 psi | 85% | 2559 fps | 100% |
| Alliant Reloder-33ᴾ | <<locked>> | 100% | 47,747 psi | 78% | 2546 fps | 96.3% |
| Baschieri & Pellagri 109 | <<locked>> | 92% | 52,011 psi | 85% | 2480 fps | 97.2% |
| Bofors RP15 | <<locked>> | 94% | 53,200 psi | 87% | 2549 fps | 99.9% |
| Bofors RP30ᴾ | <<locked>> | 100% | 54,288 psi | 89% | 2595 fps | 99.8% |
| Bofors RP5 | <<locked>> | 92% | 53,983 psi | 89% | 2559 fps | 100% |
| Bofors RP7 | <<locked>> | 82% | 54,041 psi | 89% | 2448 fps | 100% |
| Hodgdon H1000 | <<locked>> | 98% | 53,200 psi | 87% | 2556 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 82% | 53,272 psi | 87% | 2497 fps | 100% |
| Hodgdon H4831 | <<locked>> | 90% | 53,722 psi | 88% | 2507 fps | 99.1% |
| Hodgdon H4831 SC | <<locked>> | 90% | 52,692 psi | 87% | 2493 fps | 99% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 53,069 psi | 87% | 2428 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 98% | 53,505 psi | 88% | 2657 fps | 100% |
| Hodgdon Superformance | <<locked>> | 82% | 53,388 psi | 88% | 2530 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,304 psi | 61% | 1542 fps | 100% |
| IMR 4350 | <<locked>> | 84% | 52,199 psi | 86% | 2438 fps | 100% |
| IMR 4831 | <<locked>> | 84% | 52,417 psi | 86% | 2444 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 90% | 54,752 psi | 90% | 2490 fps | 99.3% |
| IMR 7828 SSC | <<locked>> | 92% | 51,895 psi | 85% | 2546 fps | 99.4% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 41,756 psi | 69% | 2425 fps | 98.2% |
| Lovex S065 | <<locked>> | 82% | 52,707 psi | 87% | 2418 fps | 100% |
| Lovex S070 | <<locked>> | 84% | 54,288 psi | 89% | 2464 fps | 100% |
| Lovex S071 | <<locked>> | 96% | 52,011 psi | 85% | 2448 fps | 100% |
| Norma 204 | <<locked>> | 84% | 52,924 psi | 87% | 2490 fps | 99.8% |
| Norma 217ᴾ | <<locked>> | 100% | 42,018 psi | 69% | 2448 fps | 99.7% |
| Norma MRP | <<locked>> | 90% | 53,795 psi | 88% | 2575 fps | 100% |
| Norma URP | <<locked>> | 84% | 53,824 psi | 88% | 2477 fps | 100% |
| Ramshot Grand | <<locked>> | 92% | 52,344 psi | 86% | 2562 fps | 99.7% |
| Ramshot Hunter | <<locked>> | 84% | 52,649 psi | 86% | 2490 fps | 100% |
| Ramshot Magnum | <<locked>> | 96% | 54,389 psi | 89% | 2552 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,247 psi | 63% | 1581 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 51,808 psi | 85% | 2470 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 84% | 53,693 psi | 88% | 2543 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 53,867 psi | 88% | 2654 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 52,750 psi | 87% | 2618 fps | 99.1% |
| Rottweil R 904 | <<locked>> | 88% | 53,650 psi | 88% | 2477 fps | 99.5% |
| Rottweil R 905 | <<locked>> | 88% | 51,735 psi | 85% | 2487 fps | 99.8% |
| Rottweil R 907 | <<locked>> | 82% | 54,041 psi | 89% | 2448 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 82% | 52,707 psi | 87% | 2418 fps | 100% |
| Shooters World SW4350 | <<locked>> | 84% | 54,288 psi | 89% | 2464 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 51,692 psi | 85% | 2379 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 54,708 psi | 90% | 2530 fps | 100% |
| Somchem S361 | <<locked>> | 88% | 54,984 psi | 90% | 2474 fps | 99.2% |
| Somchem S365 | <<locked>> | 86% | 54,534 psi | 90% | 2480 fps | 100% |
| Somchem S385 | <<locked>> | 88% | 52,170 psi | 86% | 2464 fps | 100% |
| Vihtavuori N160 | <<locked>> | 82% | 52,083 psi | 86% | 2425 fps | 100% |
| Vihtavuori N165 | <<locked>> | 92% | 51,808 psi | 85% | 2451 fps | 99.9% |
| Vihtavuori N550 | <<locked>> | 84% | 54,665 psi | 90% | 2477 fps | 100% |
| Vihtavuori N555 | <<locked>> | 90% | 54,143 psi | 89% | 2507 fps | 100% |
| Vihtavuori N560 | <<locked>> | 90% | 53,577 psi | 88% | 2575 fps | 99.3% |
| Vihtavuori N565 | <<locked>> | 96% | 53,606 psi | 88% | 2562 fps | 99.4% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 53,882 psi | 88% | 2618 fps | 98.8% |
| Vihtavuori N570ᴾ | <<locked>> | 100% | 51,039 psi | 84% | 2615 fps | 96.8% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 54,810 psi | 90% | 2434 fps | 100% |
| Winchester 760 | <<locked>> | 82% | 53,461 psi | 88% | 2500 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 94% | 53,417 psi | 88% | 2605 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 90% | 51,750 psi | 85% | 2457 fps | 99.8% |
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% | 36,434 psi | 60% | 2198 fps | 99.3% |
| Accurate 4350 | <<locked>> | 80% | 48,602 psi | 80% | 2402 fps | 100% |
| Accurate MAGPRO | <<locked>> | 80% | 37,086 psi | 61% | 2293 fps | 95% |
| ADI AR 2209 | <<locked>> | 80% | 40,350 psi | 66% | 2306 fps | 98.3% |
| ADI AR 2213 | <<locked>> | 80% | 35,998 psi | 59% | 2247 fps | 95.8% |
| ADI AR 2217 | <<locked>> | 88% | 34,867 psi | 57% | 2228 fps | 95.6% |
| ADI AR 2225 | <<locked>> | 84% | 27,673 psi | 45% | 2093 fps | 95.5% |
| Alliant Reloder-16 | <<locked>> | 80% | 46,383 psi | 76% | 2405 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 40,451 psi | 66% | 2303 fps | 98.3% |
| Alliant Reloder-22 | <<locked>> | 80% | 36,216 psi | 59% | 2257 fps | 97.4% |
| Alliant Reloder-23 | <<locked>> | 80% | 35,070 psi | 58% | 2221 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 30,356 psi | 50% | 2156 fps | 98.5% |
| Alliant Reloder-26 | <<locked>> | 80% | 38,493 psi | 63% | 2352 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 98% | 44,570 psi | 73% | 2493 fps | 95.3% |
| Baschieri & Pellagri 109 | <<locked>> | 88% | 45,948 psi | 75% | 2382 fps | 95.7% |
| Bofors RP15 | <<locked>> | 80% | 33,779 psi | 55% | 2205 fps | 96.4% |
| Bofors RP30 | <<locked>> | 86% | 34,011 psi | 56% | 2244 fps | 95.9% |
| Bofors RP5 | <<locked>> | 80% | 36,216 psi | 59% | 2257 fps | 97.4% |
| Bofors RP7 | <<locked>> | 80% | 50,778 psi | 83% | 2402 fps | 99.9% |
| Hodgdon H1000 | <<locked>> | 84% | 33,170 psi | 54% | 2188 fps | 95.6% |
| Hodgdon H414 | <<locked>> | 80% | 50,038 psi | 82% | 2448 fps | 100% |
| Hodgdon H4831 | <<locked>> | 80% | 38,450 psi | 63% | 2254 fps | 96% |
| Hodgdon H4831 SC | <<locked>> | 80% | 37,739 psi | 62% | 2241 fps | 95.7% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 43,816 psi | 72% | 2300 fps | 100% |
| Hodgdon Retumbo | 69.7 gr | 80% | 29,588 psi | 49% | 2172 fps | 95.1% |
| Hodgdon Superformance | <<locked>> | 80% | 49,705 psi | 82% | 2477 fps | 100% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,050 psi | 46% | 1378 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 46,180 psi | 76% | 2349 fps | 99.7% |
| IMR 4831 | <<locked>> | 80% | 45,992 psi | 76% | 2352 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 40,118 psi | 66% | 2254 fps | 96.6% |
| IMR 7828 SSC | <<locked>> | 80% | 34,766 psi | 57% | 2231 fps | 95.4% |
| IMR 8133 Enduron | <<locked>> | 94% | 34,345 psi | 56% | 2270 fps | 95.7% |
| Lovex S065 | <<locked>> | 80% | 49,748 psi | 82% | 2379 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 48,008 psi | 79% | 2375 fps | 100% |
| Lovex S071 | <<locked>> | 80% | 31,459 psi | 52% | 2096 fps | 98.1% |
| Norma 204 | <<locked>> | 80% | 46,238 psi | 76% | 2388 fps | 99.2% |
| Norma 217 | <<locked>> | 88% | 28,282 psi | 46% | 2139 fps | 95.3% |
| Norma MRP | <<locked>> | 80% | 38,000 psi | 62% | 2320 fps | 99% |
| Norma URP | <<locked>> | 80% | 47,384 psi | 78% | 2388 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 34,258 psi | 56% | 2238 fps | 95.6% |
| Ramshot Hunter | <<locked>> | 80% | 46,137 psi | 76% | 2392 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 30,458 psi | 50% | 2136 fps | 96.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,645 psi | 47% | 1411 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 48,443 psi | 80% | 2425 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 46,528 psi | 76% | 2441 fps | 100% |
| ReloadSwiss RS 76 | 74.6 gr | 80% | 28,514 psi | 47% | 2146 fps | 95.9% |
| ReloadSwiss RS 80 | <<locked>> | 90% | 36,448 psi | 60% | 2329 fps | 95% |
| Rottweil R 904 | <<locked>> | 80% | 41,713 psi | 68% | 2287 fps | 97.6% |
| Rottweil R 905 | <<locked>> | 80% | 39,755 psi | 65% | 2290 fps | 98.3% |
| Rottweil R 907 | <<locked>> | 80% | 50,778 psi | 83% | 2402 fps | 99.9% |
| Shooters World Long Rifle | <<locked>> | 80% | 49,748 psi | 82% | 2379 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 48,008 psi | 79% | 2375 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 48,530 psi | 80% | 2333 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 39,421 psi | 65% | 2287 fps | 98.2% |
| Somchem S361 | <<locked>> | 80% | 42,293 psi | 69% | 2280 fps | 97% |
| Somchem S365 | <<locked>> | 80% | 44,643 psi | 73% | 2349 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 40,277 psi | 66% | 2274 fps | 99% |
| Vihtavuori N160 | <<locked>> | 80% | 48,878 psi | 80% | 2382 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 35,041 psi | 58% | 2169 fps | 97.5% |
| Vihtavuori N550 | <<locked>> | 80% | 48,138 psi | 79% | 2388 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 39,247 psi | 64% | 2283 fps | 100% |
| Vihtavuori N560 | 72.4 gr | 80% | 38,101 psi | 63% | 2310 fps | 96.1% |
| Vihtavuori N565 | <<locked>> | 84% | 35,824 psi | 59% | 2257 fps | 95.6% |
| Vihtavuori N568 | <<locked>> | 92% | 40,843 psi | 67% | 2402 fps | 95.9% |
| Vihtavuori N570 | <<locked>> | 98% | 47,630 psi | 78% | 2556 fps | 95.9% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 47,747 psi | 78% | 2343 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 50,038 psi | 82% | 2448 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 80% | 31,140 psi | 51% | 2254 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 36,767 psi | 60% | 2211 fps | 97.4% |
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 69 powders for .338 Lapua Mag. loaded with the .338 | 285gr | Hornady A-MAX. Hodgdon Retumbo delivers the highest muzzle velocity at 2,657 fps; across all powders the maximum-charge window runs from 1,542 fps to 2,657 fps. ADI AR 2217 gives the best case fill at 100 %, and 69 of the 69 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 1:11.0 twist; slower twists will usually not stabilise this weight. ADI AR 2217, ADI AR 2225, Alliant Reloder-33 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, Vihtavuori N560 rank at the top here: for .338 Lapua Mag. with the .338 | 285gr | Hornady A-MAX 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.