Load Specifications
Load data in caliber .338 Marlin Express with .338 | 225gr | Woodleigh HS bullet and 59 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are IMR 3031, Winchester 748 and ReloadSwiss RS 60.
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 2015 | <<locked>> | 88% | 41,089 psi | 89% | 2182 fps | 100% |
| Accurate 2460 | <<locked>> | 86% | 41,930 psi | 90% | 2221 fps | 99.1% |
| Accurate 2495 | <<locked>> | 96% | 41,553 psi | 90% | 2254 fps | 100% |
| Accurate 2520 | <<locked>> | 90% | 40,205 psi | 87% | 2244 fps | 98.6% |
| Accurate 4064 | <<locked>> | 98% | 41,205 psi | 89% | 2274 fps | 99.5% |
| ADI AR 2219 | <<locked>> | 82% | 41,147 psi | 89% | 2224 fps | 99.7% |
| ADI Benchmark 8208 | <<locked>> | 88% | 40,219 psi | 87% | 2195 fps | 96.9% |
| Alliant AR-Comp | <<locked>> | 90% | 40,466 psi | 87% | 2244 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 84% | 40,437 psi | 87% | 2267 fps | 96.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 98% | 41,568 psi | 90% | 2270 fps | 97.1% |
| Alliant Reloder-10x | <<locked>> | 84% | 41,829 psi | 90% | 2198 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 82% | 41,611 psi | 90% | 2142 fps | 99.8% |
| Bofors RP3 | <<locked>> | 98% | 40,640 psi | 88% | 2270 fps | 96.9% |
| Hodgdon Benchmark | <<locked>> | 86% | 40,582 psi | 87% | 2159 fps | 97.6% |
| Hodgdon BL-C2 | <<locked>> | 90% | 39,798 psi | 86% | 2247 fps | 97.6% |
| Hodgdon H322 | <<locked>> | 84% | 40,248 psi | 87% | 2211 fps | 99.6% |
| Hodgdon H335 | <<locked>> | 84% | 40,857 psi | 88% | 2228 fps | 99.1% |
| Hodgdon H4895 | <<locked>> | 90% | 40,509 psi | 87% | 2231 fps | 96.3% |
| Hodgdon LEVERevolution | <<locked>> | 94% | 41,176 psi | 89% | 2283 fps | 96.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 33,098 psi | 71% | 1378 fps | 100% |
| Hodgdon VARGET | <<locked>> | 92% | 41,887 psi | 90% | 2234 fps | 96.5% |
| IMR 3031 | <<locked>> | 92% | 41,046 psi | 88% | 2277 fps | 100% |
| IMR 4198 | <<locked>> | 82% | 40,785 psi | 88% | 2139 fps | 100% |
| IMR 4895 | <<locked>> | 94% | 40,886 psi | 88% | 2267 fps | 95.9% |
| IMR 8208 XBR | <<locked>> | 88% | 40,219 psi | 87% | 2195 fps | 96.9% |
| Lovex D073.5 | <<locked>> | 86% | 41,858 psi | 90% | 2224 fps | 98.2% |
| Lovex D073.6 | <<locked>> | 92% | 40,205 psi | 87% | 2244 fps | 98.6% |
| Lovex S060 | <<locked>> | 90% | 41,959 psi | 90% | 2175 fps | 95.9% |
| Lovex S062 | <<locked>> | 94% | 39,523 psi | 85% | 2201 fps | 96.9% |
| Norma 201 | <<locked>> | 92% | 41,945 psi | 90% | 2224 fps | 97.5% |
| Norma 202 | <<locked>> | 92% | 41,669 psi | 90% | 2241 fps | 99.3% |
| Norma 203B | <<locked>> | 96% | 41,814 psi | 90% | 2274 fps | 96.1% |
| Ramshot Wild Boar | <<locked>> | 90% | 41,510 psi | 89% | 2251 fps | 95.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 33,199 psi | 72% | 1414 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 84% | 40,132 psi | 86% | 2192 fps | 98.2% |
| ReloadSwiss RS 60 | <<locked>> | 98% | 39,856 psi | 86% | 2297 fps | 97.9% |
| Rottweil R 901 | <<locked>> | 88% | 40,901 psi | 88% | 2192 fps | 99% |
| Rottweil R 902 | <<locked>> | 92% | 39,624 psi | 85% | 2178 fps | 96.9% |
| Rottweil R 903ᴾ | <<locked>> | 100% | 40,524 psi | 87% | 2260 fps | 96.6% |
| Shooters World Match Rifle | <<locked>> | 92% | 40,205 psi | 87% | 2244 fps | 98.6% |
| Shooters World Precision | <<locked>> | 94% | 39,523 psi | 85% | 2201 fps | 96.9% |
| Shooters World Tactical Rifle | <<locked>> | 82% | 39,842 psi | 86% | 2152 fps | 96.4% |
| SNPE Vectan SP 10 | <<locked>> | 82% | 41,684 psi | 90% | 2231 fps | 99.2% |
| SNPE Vectan SP 3 | <<locked>> | 82% | 39,827 psi | 86% | 2162 fps | 99.8% |
| SNPE Vectan SP 9 | <<locked>> | 92% | 41,350 psi | 89% | 2238 fps | 95.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 90% | 41,901 psi | 90% | 2159 fps | 99.2% |
| SNPE Vectan Tubal 5000 | <<locked>> | 96% | 40,567 psi | 87% | 2156 fps | 99.6% |
| Somchem S321 | <<locked>> | 86% | 40,219 psi | 87% | 2218 fps | 97.3% |
| Somchem S335 | <<locked>> | 90% | 40,828 psi | 88% | 2162 fps | 99.5% |
| Somchem S355 | <<locked>> | 98% | 39,392 psi | 85% | 2221 fps | 95.9% |
| Vihtavuori N130 | <<locked>> | 84% | 39,914 psi | 86% | 2123 fps | 100% |
| Vihtavuori N133 | <<locked>> | 90% | 41,510 psi | 89% | 2162 fps | 100% |
| Vihtavuori N135 | <<locked>> | 94% | 39,987 psi | 86% | 2215 fps | 100% |
| Vihtavuori N140 | <<locked>> | 94% | 41,959 psi | 90% | 2224 fps | 99.5% |
| Vihtavuori N150ᴾ | <<locked>> | 100% | 40,538 psi | 87% | 2218 fps | 97.6% |
| Vihtavuori N530 | <<locked>> | 88% | 40,103 psi | 86% | 2188 fps | 97% |
| Vihtavuori N540 | <<locked>> | 94% | 40,248 psi | 87% | 2218 fps | 98.9% |
| Winchester 748 | <<locked>> | 90% | 40,988 psi | 88% | 2264 fps | 98.1% |
| Winchester StaBALL Match | <<locked>> | 92% | 40,147 psi | 87% | 2234 fps | 96.2% |
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 2015 | <<locked>> | 80% | 32,198 psi | 69% | 2028 fps | 99.3% |
| Accurate 2460 | <<locked>> | 80% | 34,490 psi | 74% | 2093 fps | 97.7% |
| Accurate 2495 | <<locked>> | 80% | 24,511 psi | 53% | 1926 fps | 97.8% |
| Accurate 2520 | <<locked>> | 80% | 28,514 psi | 61% | 2021 fps | 95.2% |
| Accurate 4064 | <<locked>> | 82% | 24,932 psi | 54% | 1946 fps | 95.1% |
| ADI AR 2219 | <<locked>> | 80% | 38,493 psi | 83% | 2178 fps | 99.4% |
| ADI Benchmark 8208 | <<locked>> | 84% | 35,621 psi | 77% | 2110 fps | 95.6% |
| Alliant AR-Comp | <<locked>> | 80% | 29,530 psi | 64% | 2047 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 82% | 37,739 psi | 81% | 2218 fps | 95.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 94% | 36,796 psi | 79% | 2185 fps | 95.7% |
| Alliant Reloder-10x | <<locked>> | 80% | 36,854 psi | 79% | 2116 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 39,175 psi | 84% | 2103 fps | 99.6% |
| Bofors RP3 | <<locked>> | 94% | 35,752 psi | 77% | 2185 fps | 95.6% |
| Hodgdon Benchmark | <<locked>> | 80% | 33,895 psi | 73% | 2034 fps | 95.7% |
| Hodgdon BL-C2 | <<locked>> | 84% | 32,561 psi | 70% | 2110 fps | 95.4% |
| Hodgdon H322 | <<locked>> | 80% | 35,462 psi | 76% | 2126 fps | 98.9% |
| Hodgdon H335 | <<locked>> | 80% | 35,665 psi | 77% | 2136 fps | 98.2% |
| Hodgdon H4895 | <<locked>> | 88% | 37,985 psi | 82% | 2185 fps | 95.6% |
| Hodgdon LEVERevolution | <<locked>> | 90% | 36,129 psi | 78% | 2192 fps | 95.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 24,584 psi | 53% | 1230 fps | 100% |
| Hodgdon VARGET | <<locked>> | 88% | 37,115 psi | 80% | 2149 fps | 95.1% |
| IMR 3031 | 33.8 gr | 80% | 28,079 psi | 61% | 2021 fps | 97.8% |
| IMR 4198 | <<locked>> | 80% | 38,406 psi | 83% | 2100 fps | 100% |
| IMR 4895 | <<locked>> | 92% | 38,609 psi | 83% | 2228 fps | 95.3% |
| IMR 8208 XBR | <<locked>> | 84% | 35,621 psi | 77% | 2110 fps | 95.6% |
| Lovex D073.5 | <<locked>> | 80% | 33,953 psi | 73% | 2087 fps | 96.3% |
| Lovex D073.6 | <<locked>> | 82% | 28,718 psi | 62% | 2024 fps | 95.3% |
| Lovex S060 | <<locked>> | 88% | 39,711 psi | 86% | 2136 fps | 95.3% |
| Lovex S062 | <<locked>> | 90% | 35,027 psi | 75% | 2119 fps | 95.6% |
| Norma 201 | <<locked>> | 86% | 34,824 psi | 75% | 2100 fps | 95.5% |
| Norma 202 | <<locked>> | 80% | 28,529 psi | 61% | 1988 fps | 96% |
| Norma 203B | <<locked>> | 94% | 39,233 psi | 85% | 2228 fps | 95.4% |
| Ramshot Wild Boar | <<locked>> | 88% | 38,740 psi | 83% | 2201 fps | 95% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 24,526 psi | 53% | 1260 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 35,259 psi | 76% | 2103 fps | 97.1% |
| ReloadSwiss RS 60 | 42.2 gr | 92% | 32,909 psi | 71% | 2149 fps | 95.2% |
| Rottweil R 901 | <<locked>> | 80% | 32,372 psi | 70% | 2031 fps | 97% |
| Rottweil R 902 | <<locked>> | 88% | 35,070 psi | 76% | 2096 fps | 95.5% |
| Rottweil R 903 | <<locked>> | 96% | 35,433 psi | 76% | 2169 fps | 95% |
| Shooters World Match Rifle | <<locked>> | 82% | 28,718 psi | 62% | 2024 fps | 95.3% |
| Shooters World Precision | <<locked>> | 90% | 35,027 psi | 75% | 2119 fps | 95.6% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 37,362 psi | 81% | 2110 fps | 95.7% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 39,088 psi | 84% | 2188 fps | 98.8% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 37,478 psi | 81% | 2123 fps | 99.7% |
| SNPE Vectan SP 9 | <<locked>> | 90% | 38,827 psi | 84% | 2192 fps | 95% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 30,966 psi | 67% | 1962 fps | 96.7% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 25,063 psi | 54% | 1850 fps | 95.5% |
| Somchem S321 | <<locked>> | 80% | 32,996 psi | 71% | 2083 fps | 95.1% |
| Somchem S335 | <<locked>> | 80% | 30,139 psi | 65% | 1965 fps | 97.4% |
| Somchem S355 | <<locked>> | 96% | 37,217 psi | 80% | 2185 fps | 95.3% |
| Vihtavuori N130 | <<locked>> | 80% | 35,244 psi | 76% | 2044 fps | 99.9% |
| Vihtavuori N133 | <<locked>> | 80% | 30,719 psi | 66% | 1975 fps | 98.9% |
| Vihtavuori N135 | <<locked>> | 80% | 25,802 psi | 56% | 1939 fps | 98% |
| Vihtavuori N140 | <<locked>> | 80% | 27,108 psi | 58% | 1939 fps | 95.7% |
| Vihtavuori N150 | <<locked>> | 94% | 33,562 psi | 72% | 2093 fps | 95.6% |
| Vihtavuori N530 | <<locked>> | 84% | 35,114 psi | 76% | 2100 fps | 95.5% |
| Vihtavuori N540 | <<locked>> | 82% | 27,760 psi | 60% | 1969 fps | 95.4% |
| Winchester 748 | 37.6 gr | 82% | 31,821 psi | 69% | 2087 fps | 95.3% |
| Winchester StaBALL Match | <<locked>> | 90% | 37,681 psi | 81% | 2192 fps | 95.4% |
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 59 powders for .338 Marlin Express loaded with the .338 | 225gr | Woodleigh HS. ReloadSwiss RS 60 delivers the highest muzzle velocity at 2,297 fps; across all powders the maximum-charge window runs from 1,378 fps to 2,297 fps. Hodgdon TrailBoss gives the best case fill at 100 %, and 59 of the 59 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (320 MPa), the top charges use 71–90 %, leaving at least 10 % headroom. The 225.0 gr projectile in 0.338" calls for a 1:15.5 twist; slower twists will usually not stabilise this weight. Hodgdon TrailBoss, ReloadSwiss RS 14, Rottweil R 903 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. IMR 3031, Winchester 748, ReloadSwiss RS 60 rank at the top here: for .338 Marlin Express with the .338 | 225gr | Woodleigh HS 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.