Load Specifications
Load data in caliber .338 Marlin Express with .338 | 250gr | Alaska Bullet Works Kodiak PP SPBC bullet and 65 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 60, Hodgdon BL-C2 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% | 39,334 psi | 85% | 2028 fps | 100% |
| Accurate 2460 | <<locked>> | 82% | 39,842 psi | 86% | 2067 fps | 99.5% |
| Accurate 2495 | <<locked>> | 92% | 40,263 psi | 87% | 2103 fps | 100% |
| Accurate 2520 | <<locked>> | 86% | 40,176 psi | 87% | 2110 fps | 99.4% |
| Accurate 4064 | <<locked>> | 94% | 40,030 psi | 86% | 2126 fps | 99.8% |
| ADI AR 2206H | <<locked>> | 88% | 40,799 psi | 88% | 2110 fps | 97% |
| ADI AR 2208 | <<locked>> | 94% | 41,698 psi | 90% | 2106 fps | 96.4% |
| ADI Benchmark 8208 | <<locked>> | 86% | 40,857 psi | 88% | 2087 fps | 98.2% |
| Alliant AR-Comp | <<locked>> | 88% | 41,379 psi | 89% | 2123 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 82% | 40,886 psi | 88% | 2149 fps | 97.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 94% | 40,089 psi | 86% | 2126 fps | 97.9% |
| Alliant Reloder-15 | <<locked>> | 92% | 41,118 psi | 89% | 2136 fps | 96.6% |
| Alliant Reloder-17 | <<locked>> | 98% | 40,190 psi | 87% | 2182 fps | 97% |
| Bofors RP3 | <<locked>> | 96% | 41,829 psi | 90% | 2165 fps | 98.3% |
| Hodgdon Benchmark | <<locked>> | 84% | 40,901 psi | 88% | 2047 fps | 98.6% |
| Hodgdon BL-C2 | <<locked>> | 88% | 40,727 psi | 88% | 2139 fps | 98.7% |
| Hodgdon CFE223 | <<locked>> | 84% | 39,624 psi | 85% | 2152 fps | 96% |
| Hodgdon H322 | <<locked>> | 82% | 40,843 psi | 88% | 2093 fps | 100% |
| Hodgdon H335 | <<locked>> | 82% | 41,408 psi | 89% | 2113 fps | 99.7% |
| Hodgdon H4895 | <<locked>> | 88% | 41,060 psi | 88% | 2119 fps | 97.7% |
| Hodgdon LEVERevolution | <<locked>> | 92% | 41,669 psi | 90% | 2175 fps | 98.2% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 33,678 psi | 73% | 1306 fps | 100% |
| Hodgdon VARGET | <<locked>> | 88% | 39,871 psi | 86% | 2083 fps | 97.3% |
| IMR 3031 | <<locked>> | 88% | 39,581 psi | 85% | 2126 fps | 100% |
| IMR 4064 | <<locked>> | 92% | 41,292 psi | 89% | 2093 fps | 96.6% |
| IMR 4895 | <<locked>> | 90% | 39,363 psi | 85% | 2119 fps | 96.8% |
| IMR 8208 XBR | <<locked>> | 86% | 40,857 psi | 88% | 2087 fps | 98.2% |
| Lovex D073.5 | <<locked>> | 82% | 39,595 psi | 85% | 2067 fps | 98.7% |
| Lovex D073.6 | <<locked>> | 90% | 41,220 psi | 89% | 2136 fps | 99.5% |
| Lovex S060 | <<locked>> | 86% | 40,001 psi | 86% | 2031 fps | 96.7% |
| Lovex S062 | <<locked>> | 92% | 40,466 psi | 87% | 2100 fps | 98.2% |
| Norma 201 | <<locked>> | 88% | 40,030 psi | 86% | 2077 fps | 98.1% |
| Norma 202 | <<locked>> | 88% | 39,885 psi | 86% | 2090 fps | 99.6% |
| Norma 203B | <<locked>> | 92% | 40,306 psi | 87% | 2126 fps | 97% |
| Ramshot Big Game | <<locked>> | 92% | 40,045 psi | 86% | 2136 fps | 96.4% |
| Ramshot Wild Boar | <<locked>> | 88% | 41,974 psi | 90% | 2139 fps | 97.2% |
| Ramshot X-Terminator | <<locked>> | 84% | 41,655 psi | 90% | 2080 fps | 96.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 33,866 psi | 73% | 1339 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 40,350 psi | 87% | 2073 fps | 99.1% |
| ReloadSwiss RS 52 | <<locked>> | 90% | 40,016 psi | 86% | 2172 fps | 96.2% |
| ReloadSwiss RS 60 | <<locked>> | 96% | 40,292 psi | 87% | 2198 fps | 99.2% |
| Rottweil R 901 | <<locked>> | 86% | 41,466 psi | 89% | 2077 fps | 99.6% |
| Rottweil R 902 | <<locked>> | 90% | 40,335 psi | 87% | 2073 fps | 98.1% |
| Rottweil R 903 | <<locked>> | 98% | 41,771 psi | 90% | 2156 fps | 98% |
| Shooters World Match Rifle | <<locked>> | 90% | 41,220 psi | 89% | 2136 fps | 99.5% |
| Shooters World Precision | <<locked>> | 92% | 40,466 psi | 87% | 2100 fps | 98.2% |
| SNPE Vectan SP 11 | <<locked>> | 96% | 41,307 psi | 89% | 2162 fps | 96.9% |
| SNPE Vectan SP 9 | <<locked>> | 88% | 39,436 psi | 85% | 2087 fps | 96.6% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 40,132 psi | 86% | 2014 fps | 99.5% |
| SNPE Vectan Tubal 5000 | <<locked>> | 94% | 41,292 psi | 89% | 2047 fps | 100% |
| Somchem S321 | <<locked>> | 84% | 40,843 psi | 88% | 2110 fps | 98.5% |
| Somchem S335 | <<locked>> | 88% | 41,452 psi | 89% | 2054 fps | 99.9% |
| Somchem S341 | <<locked>> | 88% | 40,553 psi | 87% | 2096 fps | 96.7% |
| Somchem S355 | <<locked>> | 96% | 40,625 psi | 88% | 2123 fps | 97.5% |
| Somchem S365ᴾ | <<locked>> | 100% | 32,953 psi | 71% | 2057 fps | 96.3% |
| Vihtavuori N130 | <<locked>> | 82% | 40,147 psi | 87% | 2001 fps | 100% |
| Vihtavuori N133 | <<locked>> | 86% | 39,929 psi | 86% | 2014 fps | 100% |
| Vihtavuori N135 | <<locked>> | 92% | 41,118 psi | 89% | 2103 fps | 100% |
| Vihtavuori N140 | <<locked>> | 90% | 40,263 psi | 87% | 2077 fps | 99.8% |
| Vihtavuori N150 | <<locked>> | 98% | 41,423 psi | 89% | 2113 fps | 98.7% |
| Vihtavuori N530 | <<locked>> | 86% | 40,756 psi | 88% | 2080 fps | 98.2% |
| Vihtavuori N540 | <<locked>> | 92% | 41,046 psi | 88% | 2106 fps | 99.7% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 40,828 psi | 88% | 2100 fps | 97% |
| Winchester 748 | <<locked>> | 88% | 41,713 psi | 90% | 2156 fps | 99.1% |
| Winchester StaBALL Match | <<locked>> | 90% | 40,915 psi | 88% | 2133 fps | 97.6% |
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% | 34,867 psi | 75% | 1959 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 37,318 psi | 80% | 2028 fps | 99.2% |
| Accurate 2495 | <<locked>> | 80% | 27,166 psi | 59% | 1877 fps | 99.4% |
| Accurate 2520 | <<locked>> | 80% | 32,851 psi | 71% | 1985 fps | 98% |
| Accurate 4064 | <<locked>> | 80% | 25,788 psi | 56% | 1857 fps | 96.9% |
| ADI AR 2206H | <<locked>> | 84% | 36,143 psi | 78% | 2028 fps | 95.7% |
| ADI AR 2208 | <<locked>> | 90% | 37,231 psi | 80% | 2031 fps | 95.1% |
| ADI Benchmark 8208 | <<locked>> | 80% | 33,852 psi | 73% | 1962 fps | 96.4% |
| Alliant AR-Comp | <<locked>> | 80% | 32,097 psi | 69% | 1978 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 38,464 psi | 83% | 2110 fps | 97.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 31,285 psi | 67% | 1965 fps | 95.2% |
| Alliant Reloder-15 | <<locked>> | 88% | 36,129 psi | 78% | 2051 fps | 95.1% |
| Alliant Reloder-17 | <<locked>> | 94% | 35,404 psi | 76% | 2093 fps | 95.3% |
| Bofors RP3 | <<locked>> | 86% | 30,240 psi | 65% | 1959 fps | 95% |
| Hodgdon Benchmark | <<locked>> | 80% | 36,274 psi | 78% | 1969 fps | 97.6% |
| Hodgdon BL-C2 | 36.7 gr | 80% | 31,067 psi | 67% | 1965 fps | 96.3% |
| Hodgdon CFE223 | <<locked>> | 82% | 36,912 psi | 80% | 2103 fps | 95.1% |
| Hodgdon H322 | <<locked>> | 80% | 38,116 psi | 82% | 2051 fps | 99.8% |
| Hodgdon H335 | <<locked>> | 80% | 38,522 psi | 83% | 2067 fps | 99.5% |
| Hodgdon H4895 | <<locked>> | 80% | 32,068 psi | 69% | 1955 fps | 95% |
| Hodgdon LEVERevolution | 37.8 gr | 84% | 32,358 psi | 70% | 2001 fps | 95.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 24,932 psi | 54% | 1165 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 33,083 psi | 71% | 1962 fps | 95.2% |
| IMR 3031 | <<locked>> | 80% | 30,487 psi | 66% | 1965 fps | 99.3% |
| IMR 4064 | <<locked>> | 88% | 36,477 psi | 79% | 2011 fps | 95.2% |
| IMR 4895 | <<locked>> | 86% | 34,795 psi | 75% | 2037 fps | 95.5% |
| IMR 8208 XBR | <<locked>> | 80% | 33,852 psi | 73% | 1962 fps | 96.4% |
| Lovex D073.5 | <<locked>> | 80% | 37,086 psi | 80% | 2028 fps | 98.2% |
| Lovex D073.6 | <<locked>> | 80% | 29,370 psi | 63% | 1926 fps | 96.9% |
| Lovex S060 | <<locked>> | 82% | 35,447 psi | 76% | 1949 fps | 95.4% |
| Lovex S062 | <<locked>> | 82% | 29,849 psi | 64% | 1903 fps | 95.1% |
| Norma 201 | <<locked>> | 80% | 31,270 psi | 67% | 1916 fps | 95.6% |
| Norma 202 | <<locked>> | 80% | 31,038 psi | 67% | 1932 fps | 98.1% |
| Norma 203B | <<locked>> | 88% | 35,375 psi | 76% | 2041 fps | 95.6% |
| Ramshot Big Game | <<locked>> | 90% | 37,623 psi | 81% | 2093 fps | 95.7% |
| Ramshot Wild Boar | <<locked>> | 82% | 34,635 psi | 75% | 2011 fps | 95.1% |
| Ramshot X-Terminator | <<locked>> | 80% | 36,738 psi | 79% | 1998 fps | 95.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 24,947 psi | 54% | 1191 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 38,101 psi | 82% | 2037 fps | 98.7% |
| ReloadSwiss RS 52 | <<locked>> | 88% | 37,420 psi | 81% | 2126 fps | 95.4% |
| ReloadSwiss RS 60 | 38.9 gr | 86% | 29,457 psi | 63% | 1969 fps | 95.4% |
| Rottweil R 901 | <<locked>> | 80% | 34,940 psi | 75% | 1965 fps | 98.7% |
| Rottweil R 902 | <<locked>> | 82% | 31,734 psi | 68% | 1919 fps | 95.7% |
| Rottweil R 903 | <<locked>> | 90% | 32,285 psi | 70% | 1995 fps | 95.4% |
| Shooters World Match Rifle | <<locked>> | 80% | 29,370 psi | 63% | 1926 fps | 96.9% |
| Shooters World Precision | <<locked>> | 82% | 29,849 psi | 64% | 1903 fps | 95.1% |
| SNPE Vectan SP 11 | <<locked>> | 92% | 36,463 psi | 79% | 2077 fps | 95.4% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 34,693 psi | 75% | 2005 fps | 95.1% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 33,243 psi | 72% | 1900 fps | 98.4% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 26,948 psi | 58% | 1795 fps | 97.6% |
| Somchem S321 | <<locked>> | 80% | 35,621 psi | 77% | 2021 fps | 97.3% |
| Somchem S335 | <<locked>> | 80% | 32,503 psi | 70% | 1903 fps | 98.9% |
| Somchem S341 | <<locked>> | 84% | 35,621 psi | 77% | 2014 fps | 95.3% |
| Somchem S355 | <<locked>> | 90% | 33,562 psi | 72% | 2001 fps | 95.5% |
| Somchem S365 | <<locked>> | 98% | 30,937 psi | 67% | 2011 fps | 95.3% |
| Vihtavuori N130 | <<locked>> | 80% | 37,855 psi | 82% | 1969 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 33,141 psi | 71% | 1906 fps | 99.8% |
| Vihtavuori N135 | <<locked>> | 80% | 28,123 psi | 61% | 1880 fps | 99.4% |
| Vihtavuori N140 | <<locked>> | 80% | 29,312 psi | 63% | 1883 fps | 97.9% |
| Vihtavuori N150 | <<locked>> | 86% | 28,471 psi | 61% | 1880 fps | 95.1% |
| Vihtavuori N530 | <<locked>> | 80% | 33,591 psi | 72% | 1959 fps | 96.4% |
| Vihtavuori N540 | <<locked>> | 80% | 28,036 psi | 60% | 1870 fps | 96.9% |
| Winchester 6.5 StaBALL | <<locked>> | 96% | 35,781 psi | 77% | 2011 fps | 95.4% |
| Winchester 748 | <<locked>> | 80% | 32,155 psi | 69% | 1985 fps | 96.9% |
| Winchester StaBALL Match | <<locked>> | 84% | 33,721 psi | 73% | 2005 fps | 95.6% |
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 65 powders for .338 Marlin Express loaded with the .338 | 250gr | Alaska Bullet Works Kodiak PP SPBC. ReloadSwiss RS 60 delivers the highest muzzle velocity at 2,198 fps; across all powders the maximum-charge window runs from 1,306 fps to 2,198 fps. Hodgdon TrailBoss gives the best case fill at 100 %, and 65 of the 65 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 250.0 gr projectile in 0.338" calls for a 1:16.0 twist; slower twists will usually not stabilise this weight. Hodgdon TrailBoss, ReloadSwiss RS 14, Somchem S365 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, Hodgdon BL-C2, Hodgdon LEVERevolution rank at the top here: for .338 Marlin Express with the .338 | 250gr | Alaska Bullet Works Kodiak PP SPBC 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.