Load Specifications
Load data in caliber .338 Marlin Express with .338 | 250gr | Woodleigh RN SN bullet and 66 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 60, Alliant Reloder-17 and Hodgdon LEVERevolution.
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>> | 84% | 40,872 psi | 88% | 2067 fps | 100% |
| Accurate 2460 | <<locked>> | 82% | 41,524 psi | 89% | 2110 fps | 99.8% |
| Accurate 2495 | <<locked>> | 90% | 39,639 psi | 85% | 2110 fps | 100% |
| Accurate 2520 | <<locked>> | 86% | 40,422 psi | 87% | 2139 fps | 99.5% |
| Accurate 2520 | <<locked>> | 86% | 40,422 psi | 87% | 2139 fps | 99.5% |
| Accurate 4064 | <<locked>> | 92% | 39,682 psi | 86% | 2136 fps | 99.9% |
| ADI AR 2206H | <<locked>> | 86% | 40,059 psi | 86% | 2116 fps | 97.2% |
| ADI AR 2208 | <<locked>> | 92% | 41,046 psi | 88% | 2113 fps | 96.6% |
| ADI Benchmark 8208 | <<locked>> | 84% | 39,813 psi | 86% | 2087 fps | 98.2% |
| Alliant AR-Comp | <<locked>> | 86% | 40,495 psi | 87% | 2126 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 90% | 41,350 psi | 89% | 2215 fps | 96.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 94% | 41,829 psi | 90% | 2169 fps | 98.4% |
| Alliant Reloder-15 | <<locked>> | 90% | 40,292 psi | 87% | 2139 fps | 96.7% |
| Alliant Reloder-17 | <<locked>> | 98% | 41,858 psi | 90% | 2234 fps | 97.8% |
| Baschieri & Pellagri 107 | <<locked>> | 88% | 41,597 psi | 90% | 2159 fps | 96.3% |
| Bofors RP3 | <<locked>> | 94% | 41,118 psi | 89% | 2172 fps | 98.4% |
| Hodgdon Benchmark | <<locked>> | 82% | 39,711 psi | 86% | 2044 fps | 98.6% |
| Hodgdon BL-C2 | <<locked>> | 86% | 39,885 psi | 86% | 2142 fps | 98.8% |
| Hodgdon CFE223 | <<locked>> | 84% | 41,234 psi | 89% | 2201 fps | 96.9% |
| Hodgdon H4895 | <<locked>> | 86% | 40,263 psi | 87% | 2126 fps | 97.8% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 35,636 psi | 77% | 2070 fps | 96% |
| Hodgdon LEVERevolution | <<locked>> | 90% | 40,872 psi | 88% | 2182 fps | 98.3% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 33,924 psi | 73% | 1325 fps | 100% |
| Hodgdon VARGET | <<locked>> | 88% | 41,292 psi | 89% | 2126 fps | 97.9% |
| IMR 3031 | <<locked>> | 88% | 41,075 psi | 89% | 2162 fps | 100% |
| IMR 4064 | <<locked>> | 90% | 40,422 psi | 87% | 2096 fps | 96.7% |
| IMR 4895 | <<locked>> | 90% | 41,191 psi | 89% | 2165 fps | 97.6% |
| IMR 8208 XBR | <<locked>> | 84% | 39,813 psi | 86% | 2087 fps | 98.2% |
| Lovex D073.5 | <<locked>> | 82% | 41,437 psi | 89% | 2113 fps | 99.2% |
| Lovex D073.6 | <<locked>> | 88% | 40,422 psi | 87% | 2139 fps | 99.5% |
| Lovex S060 | <<locked>> | 86% | 41,191 psi | 89% | 2067 fps | 97.3% |
| Lovex S062 | <<locked>> | 90% | 39,755 psi | 86% | 2103 fps | 98.3% |
| Norma 201 | <<locked>> | 88% | 41,582 psi | 90% | 2116 fps | 98.6% |
| Norma 202 | <<locked>> | 88% | 41,510 psi | 89% | 2129 fps | 99.9% |
| Norma 203B | <<locked>> | 90% | 39,479 psi | 85% | 2133 fps | 97.1% |
| Ramshot Big Game | <<locked>> | 92% | 41,945 psi | 90% | 2185 fps | 97.3% |
| Ramshot Wild Boar | <<locked>> | 86% | 41,002 psi | 88% | 2142 fps | 97.3% |
| Ramshot X-Terminator | <<locked>> | 82% | 40,756 psi | 88% | 2083 fps | 97% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 34,127 psi | 74% | 1358 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 41,989 psi | 90% | 2116 fps | 99.5% |
| ReloadSwiss RS 52 | <<locked>> | 90% | 41,684 psi | 90% | 2221 fps | 97% |
| ReloadSwiss RS 60 | <<locked>> | 94% | 39,305 psi | 85% | 2201 fps | 99.3% |
| Rottweil R 901 | <<locked>> | 84% | 40,683 psi | 88% | 2080 fps | 99.7% |
| Rottweil R 902 | <<locked>> | 90% | 41,916 psi | 90% | 2116 fps | 98.6% |
| Rottweil R 903 | <<locked>> | 96% | 41,031 psi | 88% | 2162 fps | 98.1% |
| Shooters World Match Rifle | <<locked>> | 88% | 40,422 psi | 87% | 2139 fps | 99.5% |
| Shooters World Precision | <<locked>> | 90% | 39,755 psi | 86% | 2103 fps | 98.3% |
| SNPE Vectan SP 11 | <<locked>> | 94% | 40,408 psi | 87% | 2165 fps | 97% |
| SNPE Vectan SP 9 | <<locked>> | 88% | 41,089 psi | 89% | 2133 fps | 97.3% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 41,495 psi | 89% | 2054 fps | 99.8% |
| SNPE Vectan Tubal 5000 | <<locked>> | 92% | 40,321 psi | 87% | 2051 fps | 100% |
| Somchem S321 | <<locked>> | 82% | 39,740 psi | 86% | 2110 fps | 98.5% |
| Somchem S335 | <<locked>> | 86% | 40,422 psi | 87% | 2054 fps | 99.9% |
| Somchem S341 | <<locked>> | 86% | 39,552 psi | 85% | 2100 fps | 96.8% |
| Somchem S355 | <<locked>> | 94% | 39,726 psi | 86% | 2126 fps | 97.6% |
| Somchem S365ᴾ | <<locked>> | 100% | 34,316 psi | 74% | 2106 fps | 97.2% |
| Vihtavuori N130 | <<locked>> | 82% | 41,698 psi | 90% | 2041 fps | 100% |
| Vihtavuori N133 | <<locked>> | 86% | 41,336 psi | 89% | 2051 fps | 100% |
| Vihtavuori N135 | <<locked>> | 90% | 40,480 psi | 87% | 2106 fps | 100% |
| Vihtavuori N140 | <<locked>> | 90% | 41,771 psi | 90% | 2113 fps | 99.9% |
| Vihtavuori N150 | <<locked>> | 96% | 40,596 psi | 87% | 2119 fps | 98.8% |
| Vihtavuori N530 | <<locked>> | 84% | 39,653 psi | 85% | 2083 fps | 98.3% |
| Vihtavuori N540 | <<locked>> | 90% | 40,089 psi | 86% | 2110 fps | 99.7% |
| Winchester 6.5 StaBALL | <<locked>> | 98% | 39,682 psi | 86% | 2103 fps | 97.1% |
| Winchester 748 | <<locked>> | 86% | 40,814 psi | 88% | 2159 fps | 99.2% |
| Winchester StaBALL Match | <<locked>> | 88% | 39,914 psi | 86% | 2133 fps | 97.7% |
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 2015 | <<locked>> | 80% | 36,172 psi | 78% | 1995 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 38,972 psi | 84% | 2070 fps | 99.5% |
| Accurate 2495 | <<locked>> | 80% | 28,601 psi | 62% | 1916 fps | 99.7% |
| Accurate 2520 | <<locked>> | 80% | 32,779 psi | 71% | 2011 fps | 98.2% |
| Accurate 2520 | <<locked>> | 80% | 32,779 psi | 71% | 2011 fps | 98.2% |
| Accurate 4064 | <<locked>> | 80% | 27,137 psi | 58% | 1900 fps | 97.6% |
| ADI AR 2206H | <<locked>> | 80% | 33,243 psi | 72% | 1988 fps | 95.1% |
| ADI AR 2208 | <<locked>> | 88% | 36,260 psi | 78% | 2031 fps | 95.1% |
| ADI Benchmark 8208 | <<locked>> | 80% | 35,128 psi | 76% | 2005 fps | 97.1% |
| Alliant AR-Comp | <<locked>> | 80% | 33,330 psi | 72% | 2011 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 88% | 38,595 psi | 83% | 2162 fps | 95.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 30,676 psi | 66% | 1965 fps | 95.3% |
| Alliant Reloder-15 | <<locked>> | 86% | 35,491 psi | 76% | 2057 fps | 95.3% |
| Alliant Reloder-17 | 43.3 gr | 92% | 34,621 psi | 75% | 2096 fps | 95.5% |
| Baschieri & Pellagri 107 | <<locked>> | 86% | 38,914 psi | 84% | 2113 fps | 95.5% |
| Bofors RP3 | <<locked>> | 84% | 29,646 psi | 64% | 1962 fps | 95.1% |
| Hodgdon Benchmark | <<locked>> | 80% | 37,333 psi | 80% | 2005 fps | 98.1% |
| Hodgdon BL-C2 | <<locked>> | 80% | 32,503 psi | 70% | 2011 fps | 97.1% |
| Hodgdon CFE223 | <<locked>> | 80% | 35,984 psi | 78% | 2103 fps | 95.2% |
| Hodgdon H4895 | <<locked>> | 80% | 33,359 psi | 72% | 1998 fps | 95.8% |
| Hodgdon Hybrid 100V | <<locked>> | 98% | 33,475 psi | 72% | 2028 fps | 95.1% |
| Hodgdon LEVERevolution | 38.4 gr | 82% | 31,575 psi | 68% | 2005 fps | 95.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,193 psi | 54% | 1181 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 32,387 psi | 70% | 1965 fps | 95.3% |
| IMR 3031 | <<locked>> | 80% | 31,952 psi | 69% | 2008 fps | 99.7% |
| IMR 4064 | <<locked>> | 86% | 35,650 psi | 77% | 2014 fps | 95.3% |
| IMR 4895 | <<locked>> | 84% | 34,069 psi | 73% | 2041 fps | 95.6% |
| IMR 8208 XBR | <<locked>> | 80% | 35,128 psi | 76% | 2005 fps | 97.1% |
| Lovex D073.5 | <<locked>> | 80% | 38,653 psi | 83% | 2070 fps | 98.8% |
| Lovex D073.6 | <<locked>> | 80% | 30,922 psi | 67% | 1972 fps | 97.7% |
| Lovex S060 | <<locked>> | 80% | 34,490 psi | 74% | 1949 fps | 95.4% |
| Lovex S062 | <<locked>> | 80% | 29,167 psi | 63% | 1903 fps | 95.2% |
| Norma 201 | <<locked>> | 80% | 32,561 psi | 70% | 1959 fps | 96.4% |
| Norma 202 | <<locked>> | 80% | 32,387 psi | 70% | 1972 fps | 98.6% |
| Norma 203B | <<locked>> | 86% | 34,809 psi | 75% | 2047 fps | 95.7% |
| Ramshot Big Game | <<locked>> | 86% | 34,534 psi | 74% | 2054 fps | 95% |
| Ramshot Wild Boar | <<locked>> | 80% | 33,605 psi | 72% | 2008 fps | 95.1% |
| Ramshot X-Terminator | <<locked>> | 80% | 38,116 psi | 82% | 2041 fps | 96.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 25,237 psi | 54% | 1211 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 39,450 psi | 85% | 2077 fps | 99.2% |
| ReloadSwiss RS 52 | <<locked>> | 86% | 36,448 psi | 79% | 2126 fps | 95.5% |
| ReloadSwiss RS 60 | 39.5 gr | 84% | 28,674 psi | 62% | 1969 fps | 95.5% |
| Rottweil R 901 | <<locked>> | 80% | 36,187 psi | 78% | 2005 fps | 99.1% |
| Rottweil R 902 | <<locked>> | 80% | 31,024 psi | 67% | 1919 fps | 95.8% |
| Rottweil R 903 | <<locked>> | 88% | 31,589 psi | 68% | 1995 fps | 95.5% |
| Shooters World Match Rifle | <<locked>> | 80% | 30,922 psi | 67% | 1972 fps | 97.7% |
| Shooters World Precision | <<locked>> | 80% | 29,167 psi | 63% | 1903 fps | 95.2% |
| SNPE Vectan SP 11 | <<locked>> | 90% | 35,824 psi | 77% | 2083 fps | 95.6% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 33,924 psi | 73% | 2005 fps | 95.2% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 34,418 psi | 74% | 1936 fps | 98.9% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 27,891 psi | 60% | 1831 fps | 98.2% |
| Somchem S321 | <<locked>> | 80% | 37,130 psi | 80% | 2064 fps | 97.9% |
| Somchem S335 | <<locked>> | 80% | 33,823 psi | 73% | 1942 fps | 99.3% |
| Somchem S341 | <<locked>> | 82% | 34,693 psi | 75% | 2014 fps | 95.4% |
| Somchem S355 | <<locked>> | 88% | 33,098 psi | 71% | 2008 fps | 95.7% |
| Somchem S365 | <<locked>> | 96% | 30,371 psi | 65% | 2018 fps | 95.6% |
| Vihtavuori N130 | <<locked>> | 80% | 39,117 psi | 84% | 2001 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 34,301 psi | 74% | 1942 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 29,356 psi | 63% | 1919 fps | 99.7% |
| Vihtavuori N140 | <<locked>> | 80% | 30,574 psi | 66% | 1923 fps | 98.5% |
| Vihtavuori N150 | <<locked>> | 84% | 27,862 psi | 60% | 1880 fps | 95.2% |
| Vihtavuori N530 | <<locked>> | 80% | 34,882 psi | 75% | 1998 fps | 97.1% |
| Vihtavuori N540 | <<locked>> | 80% | 29,341 psi | 63% | 1913 fps | 97.6% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 35,027 psi | 75% | 2021 fps | 95.6% |
| Winchester 748 | <<locked>> | 80% | 33,533 psi | 72% | 2028 fps | 97.6% |
| Winchester StaBALL Match | <<locked>> | 82% | 32,924 psi | 71% | 2005 fps | 95.7% |
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 91 powders for .338 Marlin Express loaded with the .338 | 250gr | Woodleigh RN SN. Alliant Reloder-17 delivers the highest muzzle velocity at 2,234 fps; across all powders the maximum-charge window runs from 1,325 fps to 2,234 fps. Accurate 4350 gives the best case fill at 100 %, and 91 of the 91 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (320 MPa), the top charges use 61–90 %, leaving at least 10 % headroom. The 250.0 gr projectile in 0.338" calls for a 1:6.0 twist; slower twists will usually not stabilise this weight. Accurate 4350, Alliant Reloder-16, Hodgdon H414 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. ReloadSwiss RS 60, Alliant Reloder-17, Hodgdon LEVERevolution rank at the top here: for .338 Marlin Express with the .338 | 250gr | Woodleigh RN SN they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Bofors RP7, Hodgdon H414, IMR 4166 Enduron 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.