Load Specifications
Load data in caliber .338 Lapua Mag. with .338 | 300gr | Nosler Custom Competition bullet and 64 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% | 54,012 psi | 89% | 2415 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 54,955 psi | 90% | 2428 fps | 100% |
| Accurate MAGPRO | <<locked>> | 88% | 52,576 psi | 86% | 2510 fps | 99.3% |
| ADI AR 2209 | <<locked>> | 86% | 52,301 psi | 86% | 2444 fps | 100% |
| ADI AR 2213 | <<locked>> | 90% | 53,679 psi | 88% | 2503 fps | 99.8% |
| ADI AR 2217 | <<locked>> | 98% | 51,619 psi | 85% | 2477 fps | 99.8% |
| ADI AR 2218ᴾ | <<locked>> | 100% | 47,776 psi | 78% | 2510 fps | 96.8% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 49,617 psi | 81% | 2500 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 82% | 52,736 psi | 87% | 2431 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 51,953 psi | 85% | 2434 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 90% | 54,056 psi | 89% | 2500 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 90% | 52,141 psi | 86% | 2421 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 96% | 54,926 psi | 90% | 2526 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 86% | 52,040 psi | 85% | 2500 fps | 100% |
| Alliant Reloder-33ᴾ | <<locked>> | 100% | 51,822 psi | 85% | 2559 fps | 97.9% |
| Baschieri & Pellagri 109 | <<locked>> | 92% | 54,708 psi | 90% | 2474 fps | 98.3% |
| Bofors RP15 | <<locked>> | 92% | 53,287 psi | 87% | 2490 fps | 100% |
| Bofors RP30 | <<locked>> | 98% | 54,766 psi | 90% | 2543 fps | 100% |
| Bofors RP5 | <<locked>> | 90% | 54,056 psi | 89% | 2500 fps | 100% |
| Hodgdon H1000 | <<locked>> | 96% | 53,069 psi | 87% | 2497 fps | 100% |
| Hodgdon H4831 | <<locked>> | 88% | 53,330 psi | 88% | 2448 fps | 99.5% |
| Hodgdon H4831 SC | <<locked>> | 88% | 52,373 psi | 86% | 2434 fps | 99.4% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 52,866 psi | 87% | 2365 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 96% | 54,027 psi | 89% | 2605 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,478 psi | 62% | 1512 fps | 100% |
| IMR 4350 | <<locked>> | 84% | 55,013 psi | 90% | 2421 fps | 100% |
| IMR 4831 | <<locked>> | 82% | 52,025 psi | 85% | 2379 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 88% | 54,157 psi | 89% | 2428 fps | 99.6% |
| IMR 7828 SSC | <<locked>> | 90% | 51,982 psi | 85% | 2490 fps | 99.7% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 45,281 psi | 74% | 2428 fps | 99.3% |
| Lovex S070 | <<locked>> | 82% | 53,867 psi | 88% | 2402 fps | 100% |
| Lovex S071 | <<locked>> | 94% | 52,083 psi | 86% | 2392 fps | 100% |
| Norma 204 | <<locked>> | 82% | 52,388 psi | 86% | 2425 fps | 99.9% |
| Norma 217ᴾ | <<locked>> | 100% | 45,803 psi | 75% | 2451 fps | 100% |
| Norma MRP | <<locked>> | 88% | 53,824 psi | 88% | 2516 fps | 100% |
| Norma URP | <<locked>> | 82% | 53,534 psi | 88% | 2415 fps | 100% |
| Ramshot Grand | <<locked>> | 90% | 52,533 psi | 86% | 2507 fps | 99.9% |
| Ramshot Hunter | <<locked>> | 82% | 52,243 psi | 86% | 2425 fps | 100% |
| Ramshot Magnum | <<locked>> | 94% | 54,563 psi | 90% | 2497 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,435 psi | 63% | 1549 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 55,042 psi | 90% | 2451 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 82% | 53,447 psi | 88% | 2477 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 96% | 54,157 psi | 89% | 2595 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 98% | 53,388 psi | 88% | 2566 fps | 99.5% |
| Rottweil R 904 | <<locked>> | 86% | 53,185 psi | 87% | 2418 fps | 99.7% |
| Rottweil R 905 | <<locked>> | 88% | 55,071 psi | 90% | 2477 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 53,867 psi | 88% | 2402 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 54,331 psi | 89% | 2359 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 54,665 psi | 90% | 2470 fps | 100% |
| Somchem S361 | <<locked>> | 86% | 54,288 psi | 89% | 2411 fps | 99.5% |
| Somchem S365 | <<locked>> | 84% | 54,317 psi | 89% | 2415 fps | 100% |
| Somchem S385 | <<locked>> | 86% | 51,924 psi | 85% | 2402 fps | 100% |
| Vihtavuori N160 | <<locked>> | 82% | 54,897 psi | 90% | 2402 fps | 100% |
| Vihtavuori N165 | <<locked>> | 92% | 55,056 psi | 90% | 2438 fps | 100% |
| Vihtavuori N170 | <<locked>> | 96% | 53,577 psi | 88% | 2454 fps | 96.5% |
| Vihtavuori N550 | <<locked>> | 82% | 54,128 psi | 89% | 2411 fps | 100% |
| Vihtavuori N555 | <<locked>> | 88% | 54,172 psi | 89% | 2444 fps | 100% |
| Vihtavuori N560 | <<locked>> | 88% | 53,519 psi | 88% | 2516 fps | 99.6% |
| Vihtavuori N565 | <<locked>> | 94% | 53,751 psi | 88% | 2507 fps | 99.7% |
| Vihtavuori N568 | <<locked>> | 98% | 54,404 psi | 89% | 2566 fps | 99.3% |
| Vihtavuori N570 | <<locked>> | 98% | 51,372 psi | 84% | 2562 fps | 97.6% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 54,230 psi | 89% | 2369 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 92% | 54,085 psi | 89% | 2543 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 90% | 54,984 psi | 90% | 2448 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% | 38,914 psi | 64% | 2192 fps | 99.8% |
| Accurate 4350 | <<locked>> | 80% | 51,576 psi | 85% | 2382 fps | 100% |
| Accurate MAGPRO | <<locked>> | 80% | 39,798 psi | 65% | 2297 fps | 96.8% |
| ADI AR 2209 | <<locked>> | 80% | 42,859 psi | 70% | 2300 fps | 99.2% |
| ADI AR 2213 | <<locked>> | 80% | 38,348 psi | 63% | 2251 fps | 97.4% |
| ADI AR 2217 | <<locked>> | 84% | 32,561 psi | 53% | 2129 fps | 95.5% |
| ADI AR 2218 | <<locked>> | 98% | 44,512 psi | 73% | 2448 fps | 95.7% |
| ADI AR 2225 | <<locked>> | 80% | 26,063 psi | 43% | 2005 fps | 95.5% |
| Alliant Reloder-16 | <<locked>> | 80% | 49,255 psi | 81% | 2385 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 42,873 psi | 70% | 2293 fps | 99.2% |
| Alliant Reloder-22 | <<locked>> | 80% | 38,841 psi | 64% | 2257 fps | 98.6% |
| Alliant Reloder-23 | <<locked>> | 80% | 37,507 psi | 62% | 2208 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 32,430 psi | 53% | 2156 fps | 99.5% |
| Alliant Reloder-26 | <<locked>> | 80% | 41,655 psi | 68% | 2346 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 94% | 41,771 psi | 69% | 2388 fps | 95.3% |
| Baschieri & Pellagri 109 | <<locked>> | 84% | 42,714 psi | 70% | 2277 fps | 95.6% |
| Bofors RP15 | <<locked>> | 80% | 36,100 psi | 59% | 2201 fps | 97.8% |
| Bofors RP30 | <<locked>> | 82% | 31,923 psi | 52% | 2142 fps | 95.8% |
| Bofors RP5 | <<locked>> | 80% | 38,841 psi | 64% | 2257 fps | 98.6% |
| Hodgdon H1000 | <<locked>> | 80% | 30,980 psi | 51% | 2093 fps | 95.5% |
| Hodgdon H4831 | <<locked>> | 80% | 40,799 psi | 67% | 2247 fps | 97.4% |
| Hodgdon H4831 SC | <<locked>> | 80% | 40,176 psi | 66% | 2238 fps | 97.2% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 46,528 psi | 76% | 2283 fps | 100% |
| Hodgdon Retumbo | 71 gr | 80% | 31,705 psi | 52% | 2185 fps | 97.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,195 psi | 46% | 1348 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 48,588 psi | 80% | 2333 fps | 100% |
| IMR 4831 | <<locked>> | 80% | 48,733 psi | 80% | 2336 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 42,250 psi | 69% | 2244 fps | 97.9% |
| IMR 7828 SSC | <<locked>> | 80% | 37,014 psi | 61% | 2234 fps | 97.1% |
| IMR 8133 Enduron | <<locked>> | 90% | 32,619 psi | 54% | 2182 fps | 95.9% |
| Lovex S070 | <<locked>> | 80% | 50,560 psi | 83% | 2356 fps | 100% |
| Lovex S071 | <<locked>> | 80% | 33,547 psi | 55% | 2090 fps | 99.1% |
| Norma 204 | <<locked>> | 80% | 49,023 psi | 80% | 2375 fps | 99.8% |
| Norma 217 | <<locked>> | 84% | 26,861 psi | 44% | 2054 fps | 95.4% |
| Norma MRP | <<locked>> | 80% | 40,886 psi | 67% | 2316 fps | 99.7% |
| Norma URP | <<locked>> | 80% | 50,125 psi | 82% | 2369 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 36,608 psi | 60% | 2238 fps | 97.4% |
| Ramshot Hunter | <<locked>> | 80% | 48,994 psi | 80% | 2379 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 32,735 psi | 54% | 2139 fps | 97.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,805 psi | 47% | 1381 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 51,576 psi | 85% | 2408 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 49,777 psi | 82% | 2428 fps | 100% |
| ReloadSwiss RS 76 | 76 gr | 80% | 30,647 psi | 50% | 2162 fps | 98% |
| ReloadSwiss RS 80 | 84.2 gr | 88% | 36,782 psi | 60% | 2287 fps | 96% |
| Rottweil R 904 | <<locked>> | 80% | 44,034 psi | 72% | 2277 fps | 98.7% |
| Rottweil R 905 | <<locked>> | 80% | 42,264 psi | 69% | 2283 fps | 99.2% |
| Shooters World SW4350 | <<locked>> | 80% | 50,560 psi | 83% | 2356 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 50,923 psi | 84% | 2316 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 41,930 psi | 69% | 2280 fps | 99.2% |
| Somchem S361 | <<locked>> | 80% | 44,672 psi | 73% | 2270 fps | 98.2% |
| Somchem S365 | <<locked>> | 80% | 47,601 psi | 78% | 2329 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 42,902 psi | 70% | 2267 fps | 99.7% |
| Vihtavuori N160 | <<locked>> | 80% | 51,619 psi | 85% | 2362 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 37,275 psi | 61% | 2162 fps | 98.6% |
| Vihtavuori N170 | <<locked>> | 94% | 50,024 psi | 82% | 2402 fps | 95.7% |
| Vihtavuori N550 | <<locked>> | 80% | 50,807 psi | 83% | 2369 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 41,945 psi | 69% | 2270 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 40,828 psi | 67% | 2310 fps | 97.6% |
| Vihtavuori N565 | <<locked>> | 80% | 33,634 psi | 55% | 2159 fps | 95.6% |
| Vihtavuori N568 | <<locked>> | 88% | 38,232 psi | 63% | 2300 fps | 95.9% |
| Vihtavuori N570 | <<locked>> | 94% | 44,643 psi | 73% | 2451 fps | 95.9% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 50,705 psi | 83% | 2323 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 80% | 34,447 psi | 57% | 2254 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 39,233 psi | 64% | 2208 fps | 98.6% |
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 70 powders for .338 Lapua Mag. loaded with the .338 | 300gr | Nosler Custom Competition. Hodgdon Retumbo delivers the highest muzzle velocity at 2,605 fps; across all powders the maximum-charge window runs from 1,512 fps to 2,605 fps. Accurate 8700 gives the best case fill at 100 %, and 70 of the 70 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (420 MPa), the top charges use 62–90 %, leaving at least 10 % headroom. The 300.0 gr projectile in 0.338" calls for a 1:12.0 twist; slower twists will usually not stabilise this weight. Accurate 8700, 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, ReloadSwiss RS 80 rank at the top here: for .338 Lapua Mag. with the .338 | 300gr | Nosler Custom Competition 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.