Load Specifications
Load data in caliber .338 Lapua Mag. with .338 | 300gr | Berger Hybrid OTM bullet and 66 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 ReloadSwiss RS 80.
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>> | 90% | 53,214 psi | 87% | 2402 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 54,215 psi | 89% | 2415 fps | 100% |
| Accurate MAGPRO | <<locked>> | 88% | 51,793 psi | 85% | 2493 fps | 99.1% |
| ADI AR 2209 | <<locked>> | 88% | 54,868 psi | 90% | 2477 fps | 100% |
| ADI AR 2213 | <<locked>> | 90% | 52,910 psi | 87% | 2490 fps | 99.7% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 54,433 psi | 89% | 2513 fps | 99.9% |
| ADI AR 2218ᴾ | <<locked>> | 100% | 46,978 psi | 77% | 2490 fps | 96.4% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 48,834 psi | 80% | 2487 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 82% | 51,967 psi | 85% | 2418 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 54,650 psi | 90% | 2470 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 90% | 53,272 psi | 87% | 2490 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 92% | 54,665 psi | 90% | 2451 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 96% | 54,143 psi | 89% | 2513 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 88% | 54,824 psi | 90% | 2533 fps | 100% |
| Alliant Reloder-33ᴾ | <<locked>> | 100% | 50,879 psi | 84% | 2543 fps | 97.7% |
| Baschieri & Pellagri 109 | <<locked>> | 92% | 54,027 psi | 89% | 2461 fps | 98.2% |
| Bofors RP15 | <<locked>> | 92% | 52,504 psi | 86% | 2477 fps | 100% |
| Bofors RP30 | <<locked>> | 98% | 53,824 psi | 88% | 2530 fps | 99.9% |
| Bofors RP5 | <<locked>> | 90% | 53,272 psi | 87% | 2490 fps | 100% |
| Hodgdon H1000 | <<locked>> | 96% | 52,185 psi | 86% | 2484 fps | 100% |
| Hodgdon H4831 | <<locked>> | 88% | 52,576 psi | 86% | 2434 fps | 99.4% |
| Hodgdon H4831 SC | <<locked>> | 88% | 51,605 psi | 85% | 2421 fps | 99.3% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 52,141 psi | 86% | 2356 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 96% | 53,026 psi | 87% | 2589 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,449 psi | 61% | 1506 fps | 100% |
| IMR 4350 | <<locked>> | 84% | 54,389 psi | 89% | 2411 fps | 100% |
| IMR 4831 | <<locked>> | 84% | 54,636 psi | 90% | 2411 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 88% | 53,447 psi | 88% | 2415 fps | 99.5% |
| IMR 7828 SSC | <<locked>> | 92% | 54,665 psi | 90% | 2523 fps | 99.9% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 44,382 psi | 73% | 2411 fps | 99.1% |
| Lovex S065 | <<locked>> | 82% | 54,810 psi | 90% | 2385 fps | 100% |
| Lovex S070 | <<locked>> | 82% | 53,200 psi | 87% | 2388 fps | 100% |
| Lovex S071 | <<locked>> | 96% | 54,679 psi | 90% | 2421 fps | 100% |
| Norma 204 | <<locked>> | 82% | 51,750 psi | 85% | 2415 fps | 99.9% |
| Norma 217ᴾ | <<locked>> | 100% | 44,831 psi | 74% | 2434 fps | 100% |
| Norma MRP | <<locked>> | 88% | 52,997 psi | 87% | 2503 fps | 100% |
| Norma URP | <<locked>> | 82% | 52,852 psi | 87% | 2402 fps | 100% |
| Ramshot Grand | <<locked>> | 90% | 51,517 psi | 85% | 2490 fps | 99.8% |
| Ramshot Hunter | <<locked>> | 84% | 55,100 psi | 90% | 2457 fps | 100% |
| Ramshot Magnum | <<locked>> | 94% | 53,621 psi | 88% | 2484 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,421 psi | 63% | 1545 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 54,375 psi | 89% | 2441 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 82% | 52,547 psi | 86% | 2464 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 96% | 53,229 psi | 87% | 2582 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 98% | 52,301 psi | 86% | 2549 fps | 99.4% |
| Rottweil R 904 | <<locked>> | 86% | 52,576 psi | 86% | 2405 fps | 99.7% |
| Rottweil R 905 | <<locked>> | 88% | 54,230 psi | 89% | 2461 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 82% | 54,810 psi | 90% | 2385 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 53,200 psi | 87% | 2388 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 53,751 psi | 88% | 2349 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 53,824 psi | 88% | 2457 fps | 100% |
| Somchem S361 | <<locked>> | 86% | 53,650 psi | 88% | 2402 fps | 99.4% |
| Somchem S365 | <<locked>> | 84% | 53,534 psi | 88% | 2405 fps | 100% |
| Somchem S385 | <<locked>> | 88% | 54,607 psi | 90% | 2434 fps | 100% |
| Vihtavuori N160 | <<locked>> | 82% | 54,201 psi | 89% | 2392 fps | 100% |
| Vihtavuori N165 | <<locked>> | 92% | 54,114 psi | 89% | 2421 fps | 100% |
| Vihtavuori N170 | <<locked>> | 96% | 52,808 psi | 87% | 2441 fps | 96.3% |
| Vihtavuori N550 | <<locked>> | 82% | 53,505 psi | 88% | 2402 fps | 100% |
| Vihtavuori N555 | <<locked>> | 88% | 53,461 psi | 88% | 2434 fps | 100% |
| Vihtavuori N560 | <<locked>> | 88% | 52,692 psi | 87% | 2503 fps | 99.5% |
| Vihtavuori N565 | <<locked>> | 94% | 52,866 psi | 87% | 2493 fps | 99.7% |
| Vihtavuori N568 | <<locked>> | 98% | 53,287 psi | 87% | 2549 fps | 99.1% |
| Vihtavuori N570ᴾ | <<locked>> | 100% | 54,186 psi | 89% | 2602 fps | 98% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 53,505 psi | 88% | 2356 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 92% | 53,098 psi | 87% | 2530 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 90% | 54,273 psi | 89% | 2434 fps | 100% |
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% | 38,261 psi | 63% | 2178 fps | 99.8% |
| Accurate 4350 | <<locked>> | 80% | 50,792 psi | 83% | 2372 fps | 100% |
| Accurate MAGPRO | <<locked>> | 80% | 39,189 psi | 64% | 2280 fps | 96.5% |
| ADI AR 2209 | <<locked>> | 80% | 42,221 psi | 69% | 2283 fps | 99.1% |
| ADI AR 2213 | <<locked>> | 80% | 37,797 psi | 62% | 2234 fps | 97.1% |
| ADI AR 2217 | <<locked>> | 84% | 32,082 psi | 53% | 2116 fps | 95.2% |
| ADI AR 2218 | <<locked>> | 98% | 43,714 psi | 72% | 2428 fps | 95.3% |
| ADI AR 2225 | <<locked>> | 80% | 25,657 psi | 42% | 1991 fps | 95.1% |
| Alliant Reloder-16 | <<locked>> | 80% | 48,689 psi | 80% | 2375 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 42,235 psi | 69% | 2280 fps | 99.1% |
| Alliant Reloder-22 | <<locked>> | 80% | 38,218 psi | 63% | 2244 fps | 98.5% |
| Alliant Reloder-23 | <<locked>> | 80% | 36,970 psi | 61% | 2195 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 31,894 psi | 52% | 2142 fps | 99.4% |
| Alliant Reloder-26 | <<locked>> | 80% | 40,828 psi | 67% | 2333 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 96% | 43,947 psi | 72% | 2428 fps | 95.9% |
| Baschieri & Pellagri 109 | <<locked>> | 84% | 42,322 psi | 69% | 2267 fps | 95.3% |
| Bofors RP15 | <<locked>> | 80% | 35,491 psi | 58% | 2188 fps | 97.6% |
| Bofors RP30 | <<locked>> | 82% | 31,357 psi | 51% | 2129 fps | 95.5% |
| Bofors RP5 | <<locked>> | 80% | 38,218 psi | 63% | 2244 fps | 98.5% |
| Hodgdon H1000 | <<locked>> | 80% | 30,545 psi | 50% | 2080 fps | 95.2% |
| Hodgdon H4831 | <<locked>> | 80% | 40,219 psi | 66% | 2234 fps | 97.2% |
| Hodgdon H4831 SC | <<locked>> | 80% | 39,595 psi | 65% | 2224 fps | 97% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 45,803 psi | 75% | 2270 fps | 100% |
| Hodgdon Retumbo | 70 gr | 80% | 31,212 psi | 51% | 2169 fps | 97% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,195 psi | 46% | 1345 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 47,964 psi | 79% | 2320 fps | 100% |
| IMR 4831 | <<locked>> | 80% | 48,008 psi | 79% | 2323 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 41,713 psi | 68% | 2231 fps | 97.7% |
| IMR 7828 SSC | <<locked>> | 80% | 36,463 psi | 60% | 2218 fps | 96.8% |
| IMR 8133 Enduron | <<locked>> | 90% | 31,995 psi | 53% | 2165 fps | 95.5% |
| Lovex S065 | <<locked>> | 80% | 51,576 psi | 85% | 2343 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 49,864 psi | 82% | 2343 fps | 100% |
| Lovex S071 | <<locked>> | 80% | 33,054 psi | 54% | 2077 fps | 99% |
| Norma 204 | <<locked>> | 80% | 48,399 psi | 79% | 2365 fps | 99.7% |
| Norma 217 | <<locked>> | 84% | 26,411 psi | 43% | 2041 fps | 95.1% |
| Norma MRP | <<locked>> | 80% | 40,074 psi | 66% | 2300 fps | 99.6% |
| Norma URP | <<locked>> | 80% | 49,414 psi | 81% | 2356 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 36,027 psi | 59% | 2224 fps | 97.1% |
| Ramshot Hunter | <<locked>> | 80% | 48,356 psi | 79% | 2365 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 32,213 psi | 53% | 2126 fps | 97.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,834 psi | 47% | 1378 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 50,705 psi | 83% | 2392 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 48,863 psi | 80% | 2415 fps | 100% |
| ReloadSwiss RS 76 | 74.9 gr | 80% | 30,081 psi | 49% | 2146 fps | 97.6% |
| ReloadSwiss RS 80 | 83.1 gr | 88% | 36,143 psi | 59% | 2270 fps | 95.7% |
| Rottweil R 904 | <<locked>> | 80% | 43,410 psi | 71% | 2264 fps | 98.5% |
| Rottweil R 905 | <<locked>> | 80% | 41,771 psi | 69% | 2270 fps | 99.1% |
| Shooters World Long Rifle | <<locked>> | 80% | 51,576 psi | 85% | 2343 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 49,864 psi | 82% | 2343 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 50,488 psi | 83% | 2306 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 41,437 psi | 68% | 2267 fps | 99.1% |
| Somchem S361 | <<locked>> | 80% | 44,019 psi | 72% | 2257 fps | 98% |
| Somchem S365 | <<locked>> | 80% | 46,833 psi | 77% | 2320 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 42,279 psi | 69% | 2254 fps | 99.6% |
| Vihtavuori N160 | <<locked>> | 80% | 50,908 psi | 84% | 2349 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 36,738 psi | 60% | 2149 fps | 98.5% |
| Vihtavuori N170 | <<locked>> | 94% | 49,255 psi | 81% | 2388 fps | 95.5% |
| Vihtavuori N550 | <<locked>> | 80% | 50,154 psi | 82% | 2356 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 41,249 psi | 68% | 2257 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 40,059 psi | 66% | 2297 fps | 97.4% |
| Vihtavuori N565 | <<locked>> | 80% | 33,083 psi | 54% | 2142 fps | 95.3% |
| Vihtavuori N568 | <<locked>> | 88% | 37,623 psi | 62% | 2283 fps | 95.6% |
| Vihtavuori N570 | <<locked>> | 94% | 43,816 psi | 72% | 2434 fps | 95.5% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 49,937 psi | 82% | 2313 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 80% | 33,663 psi | 55% | 2241 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 38,667 psi | 63% | 2195 fps | 98.4% |
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 72 powders for .338 Lapua Mag. loaded with the .338 | 300gr | Berger Hybrid OTM. Vihtavuori N570 delivers the highest muzzle velocity at 2,602 fps; across all powders the maximum-charge window runs from 1,506 fps to 2,602 fps. Accurate 8700 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 300.0 gr projectile in 0.338" calls for a 1:11.0 twist; slower twists will usually not stabilise this weight. Accurate 8700, ADI AR 2217, ADI AR 2218 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, ReloadSwiss RS 80 rank at the top here: for .338 Lapua Mag. with the .338 | 300gr | Berger Hybrid OTM they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate 8700, IMR 7977 Enduron, Lovex D100 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.