Load Specifications
Load data in caliber .338 Marlin Express with .338 | 250gr | Nosler Partition RN 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, 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>> | 86% | 41,176 psi | 89% | 2051 fps | 100% |
| Accurate 2460 | <<locked>> | 82% | 39,363 psi | 85% | 2054 fps | 99.4% |
| Accurate 2495 | <<locked>> | 92% | 39,392 psi | 85% | 2087 fps | 100% |
| Accurate 2520 | <<locked>> | 88% | 40,495 psi | 87% | 2119 fps | 99.3% |
| Accurate 4064 | <<locked>> | 94% | 39,581 psi | 85% | 2116 fps | 99.8% |
| ADI AR 2206H | <<locked>> | 88% | 40,408 psi | 87% | 2096 fps | 96.8% |
| ADI AR 2208 | <<locked>> | 94% | 41,350 psi | 89% | 2093 fps | 96.1% |
| ADI Benchmark 8208 | <<locked>> | 86% | 40,118 psi | 86% | 2067 fps | 97.9% |
| Alliant AR-Comp | <<locked>> | 88% | 40,814 psi | 88% | 2110 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 82% | 40,263 psi | 87% | 2133 fps | 97.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 96% | 41,756 psi | 90% | 2146 fps | 98.1% |
| Alliant Reloder-10x | <<locked>> | 82% | 41,858 psi | 90% | 2064 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 92% | 40,408 psi | 87% | 2119 fps | 96.2% |
| Alliant Reloder-17 | <<locked>> | 98% | 39,711 psi | 86% | 2165 fps | 96.7% |
| Baschieri & Pellagri 107 | <<locked>> | 90% | 41,858 psi | 90% | 2136 fps | 95.8% |
| Bofors RP3 | <<locked>> | 96% | 41,133 psi | 89% | 2149 fps | 98.1% |
| Hodgdon Benchmark | <<locked>> | 84% | 40,190 psi | 87% | 2028 fps | 98.4% |
| Hodgdon BL-C2 | <<locked>> | 88% | 40,074 psi | 86% | 2123 fps | 98.5% |
| Hodgdon CFE223 | <<locked>> | 86% | 41,582 psi | 90% | 2178 fps | 96.5% |
| Hodgdon H322 | <<locked>> | 82% | 40,234 psi | 87% | 2080 fps | 99.9% |
| Hodgdon H335 | <<locked>> | 82% | 40,654 psi | 88% | 2093 fps | 99.6% |
| Hodgdon H4895 | <<locked>> | 88% | 40,596 psi | 87% | 2106 fps | 97.5% |
| Hodgdon LEVERevolution | <<locked>> | 92% | 41,060 psi | 88% | 2159 fps | 97.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 33,620 psi | 72% | 1299 fps | 100% |
| Hodgdon VARGET | <<locked>> | 90% | 41,843 psi | 90% | 2110 fps | 97.6% |
| IMR 3031 | <<locked>> | 90% | 41,205 psi | 89% | 2146 fps | 100% |
| IMR 4064 | <<locked>> | 92% | 40,611 psi | 88% | 2077 fps | 96.3% |
| IMR 4895 | <<locked>> | 92% | 41,278 psi | 89% | 2146 fps | 97.2% |
| IMR 8208 XBR | <<locked>> | 86% | 40,118 psi | 86% | 2067 fps | 97.9% |
| Lovex D073.5 | <<locked>> | 84% | 41,814 psi | 90% | 2096 fps | 99% |
| Lovex D073.6 | <<locked>> | 90% | 40,495 psi | 87% | 2119 fps | 99.3% |
| Lovex S060 | <<locked>> | 88% | 41,916 psi | 90% | 2054 fps | 97% |
| Lovex S062 | <<locked>> | 92% | 39,769 psi | 86% | 2080 fps | 98% |
| Norma 201 | <<locked>> | 90% | 41,916 psi | 90% | 2100 fps | 98.4% |
| Norma 202 | <<locked>> | 90% | 41,800 psi | 90% | 2113 fps | 99.8% |
| Norma 203B | <<locked>> | 92% | 39,595 psi | 85% | 2110 fps | 96.7% |
| Ramshot Big Game | <<locked>> | 92% | 39,508 psi | 85% | 2116 fps | 96.1% |
| Ramshot Wild Boar | <<locked>> | 88% | 41,336 psi | 89% | 2123 fps | 96.9% |
| Ramshot X-Terminator | <<locked>> | 84% | 41,263 psi | 89% | 2067 fps | 96.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 33,808 psi | 73% | 1332 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 39,900 psi | 86% | 2060 fps | 99% |
| ReloadSwiss RS 52 | <<locked>> | 90% | 39,305 psi | 85% | 2152 fps | 95.9% |
| ReloadSwiss RS 60 | <<locked>> | 96% | 39,842 psi | 86% | 2182 fps | 99% |
| Rottweil R 901 | <<locked>> | 86% | 40,959 psi | 88% | 2064 fps | 99.5% |
| Rottweil R 902 | <<locked>> | 90% | 39,856 psi | 86% | 2060 fps | 97.9% |
| Rottweil R 903 | <<locked>> | 98% | 41,031 psi | 88% | 2139 fps | 97.7% |
| Shooters World Match Rifle | <<locked>> | 90% | 40,495 psi | 87% | 2119 fps | 99.3% |
| Shooters World Precision | <<locked>> | 92% | 39,769 psi | 86% | 2080 fps | 98% |
| SNPE Vectan SP 11 | <<locked>> | 96% | 40,756 psi | 88% | 2146 fps | 96.6% |
| SNPE Vectan SP 9 | <<locked>> | 90% | 41,394 psi | 89% | 2113 fps | 97% |
| SNPE Vectan Tubal 3000 | <<locked>> | 88% | 41,756 psi | 90% | 2031 fps | 99.6% |
| SNPE Vectan Tubal 5000 | <<locked>> | 94% | 40,857 psi | 88% | 2034 fps | 99.9% |
| Somchem S321 | <<locked>> | 84% | 40,118 psi | 86% | 2093 fps | 98.2% |
| Somchem S335 | <<locked>> | 88% | 40,973 psi | 88% | 2041 fps | 99.9% |
| Somchem S341 | <<locked>> | 88% | 39,914 psi | 86% | 2080 fps | 96.4% |
| Somchem S355 | <<locked>> | 96% | 39,914 psi | 86% | 2106 fps | 97.2% |
| Vihtavuori N130 | <<locked>> | 82% | 39,595 psi | 85% | 1988 fps | 100% |
| Vihtavuori N133 | <<locked>> | 88% | 41,510 psi | 89% | 2031 fps | 100% |
| Vihtavuori N135 | <<locked>> | 92% | 40,553 psi | 87% | 2090 fps | 100% |
| Vihtavuori N140 | <<locked>> | 90% | 39,523 psi | 85% | 2060 fps | 99.7% |
| Vihtavuori N150 | <<locked>> | 98% | 40,785 psi | 88% | 2096 fps | 98.6% |
| Vihtavuori N530 | <<locked>> | 86% | 40,016 psi | 86% | 2064 fps | 98% |
| Vihtavuori N540 | <<locked>> | 92% | 40,422 psi | 87% | 2090 fps | 99.5% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 40,147 psi | 87% | 2080 fps | 96.6% |
| Winchester 748 | <<locked>> | 88% | 41,002 psi | 88% | 2136 fps | 98.9% |
| Winchester StaBALL Match | <<locked>> | 90% | 40,263 psi | 87% | 2113 fps | 97.4% |
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% | 34,330 psi | 74% | 1942 fps | 99.9% |
| Accurate 2460 | <<locked>> | 80% | 36,811 psi | 79% | 2014 fps | 99% |
| Accurate 2495 | <<locked>> | 80% | 26,672 psi | 57% | 1860 fps | 99.2% |
| Accurate 2520 | <<locked>> | 80% | 30,763 psi | 66% | 1949 fps | 97.3% |
| Accurate 4064 | <<locked>> | 80% | 25,280 psi | 54% | 1841 fps | 96.5% |
| ADI AR 2206H | <<locked>> | 84% | 35,708 psi | 77% | 2014 fps | 95.4% |
| ADI AR 2208 | <<locked>> | 92% | 38,754 psi | 84% | 2051 fps | 95.4% |
| ADI Benchmark 8208 | <<locked>> | 80% | 33,388 psi | 72% | 1949 fps | 96.1% |
| Alliant AR-Comp | <<locked>> | 80% | 31,546 psi | 68% | 1962 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 37,884 psi | 82% | 2093 fps | 97% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 32,735 psi | 71% | 1988 fps | 95.6% |
| Alliant Reloder-10x | <<locked>> | 80% | 39,421 psi | 85% | 2028 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 90% | 37,869 psi | 82% | 2073 fps | 95.5% |
| Alliant Reloder-17 | <<locked>> | 96% | 37,246 psi | 80% | 2119 fps | 95.8% |
| Baschieri & Pellagri 107 | <<locked>> | 88% | 39,305 psi | 85% | 2093 fps | 95% |
| Bofors RP3 | <<locked>> | 88% | 31,662 psi | 68% | 1985 fps | 95.4% |
| Hodgdon Benchmark | <<locked>> | 80% | 35,795 psi | 77% | 1952 fps | 97.4% |
| Hodgdon BL-C2 | 36.2 gr | 80% | 30,647 psi | 66% | 1952 fps | 96% |
| Hodgdon CFE223 | <<locked>> | 84% | 38,986 psi | 84% | 2133 fps | 95.7% |
| Hodgdon H322 | <<locked>> | 80% | 37,565 psi | 81% | 2037 fps | 99.7% |
| Hodgdon H335 | <<locked>> | 80% | 38,043 psi | 82% | 2054 fps | 99.3% |
| Hodgdon H4895 | <<locked>> | 82% | 33,533 psi | 72% | 1978 fps | 95.4% |
| Hodgdon LEVERevolution | 37.3 gr | 84% | 31,995 psi | 69% | 1988 fps | 95.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,077 psi | 54% | 1161 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 34,882 psi | 75% | 1991 fps | 95.7% |
| IMR 3031 | <<locked>> | 80% | 30,008 psi | 65% | 1949 fps | 99.2% |
| IMR 4064 | <<locked>> | 90% | 38,276 psi | 82% | 2037 fps | 95.6% |
| IMR 4895 | <<locked>> | 86% | 34,069 psi | 73% | 2018 fps | 95.1% |
| IMR 8208 XBR | <<locked>> | 80% | 33,388 psi | 72% | 1949 fps | 96.1% |
| Lovex D073.5 | <<locked>> | 80% | 36,608 psi | 79% | 2014 fps | 98% |
| Lovex D073.6 | <<locked>> | 80% | 28,906 psi | 62% | 1913 fps | 96.6% |
| Lovex S060 | <<locked>> | 82% | 34,998 psi | 75% | 1936 fps | 95.1% |
| Lovex S062 | <<locked>> | 84% | 31,169 psi | 67% | 1926 fps | 95.5% |
| Norma 201 | <<locked>> | 80% | 30,777 psi | 66% | 1900 fps | 95.3% |
| Norma 202 | <<locked>> | 80% | 30,530 psi | 66% | 1916 fps | 97.8% |
| Norma 203B | <<locked>> | 88% | 34,940 psi | 75% | 2028 fps | 95.3% |
| Ramshot Big Game | <<locked>> | 90% | 37,072 psi | 80% | 2073 fps | 95.4% |
| Ramshot Wild Boar | <<locked>> | 84% | 36,303 psi | 78% | 2037 fps | 95.5% |
| Ramshot X-Terminator | <<locked>> | 80% | 36,376 psi | 78% | 1985 fps | 95.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 25,077 psi | 54% | 1191 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 37,318 psi | 80% | 2018 fps | 98.5% |
| ReloadSwiss RS 52 | <<locked>> | 88% | 36,782 psi | 79% | 2106 fps | 95% |
| ReloadSwiss RS 60 | 39.2 gr | 88% | 30,864 psi | 67% | 1995 fps | 96% |
| Rottweil R 901 | <<locked>> | 80% | 34,374 psi | 74% | 1952 fps | 98.5% |
| Rottweil R 902 | <<locked>> | 82% | 31,314 psi | 67% | 1903 fps | 95.4% |
| Rottweil R 903 | <<locked>> | 90% | 31,618 psi | 68% | 1975 fps | 95% |
| Shooters World Match Rifle | <<locked>> | 80% | 28,906 psi | 62% | 1913 fps | 96.6% |
| Shooters World Precision | <<locked>> | 84% | 31,169 psi | 67% | 1926 fps | 95.5% |
| SNPE Vectan SP 11 | <<locked>> | 92% | 36,158 psi | 78% | 2064 fps | 95.2% |
| SNPE Vectan SP 9 | <<locked>> | 86% | 36,318 psi | 78% | 2028 fps | 95.6% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 32,779 psi | 71% | 1883 fps | 98.2% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 26,527 psi | 57% | 1778 fps | 97.4% |
| Somchem S321 | <<locked>> | 80% | 35,230 psi | 76% | 2008 fps | 97.1% |
| Somchem S335 | <<locked>> | 80% | 32,082 psi | 69% | 1890 fps | 98.8% |
| Somchem S341 | <<locked>> | 86% | 37,405 psi | 81% | 2037 fps | 95.7% |
| Somchem S355 | <<locked>> | 90% | 33,156 psi | 71% | 1988 fps | 95.2% |
| Vihtavuori N130 | <<locked>> | 80% | 37,289 psi | 80% | 1955 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 32,605 psi | 70% | 1893 fps | 99.8% |
| Vihtavuori N135 | <<locked>> | 80% | 27,630 psi | 60% | 1867 fps | 99.3% |
| Vihtavuori N140 | <<locked>> | 80% | 28,921 psi | 62% | 1867 fps | 97.6% |
| Vihtavuori N150 | <<locked>> | 88% | 29,805 psi | 64% | 1903 fps | 95.5% |
| Vihtavuori N530 | <<locked>> | 80% | 33,141 psi | 71% | 1942 fps | 96.1% |
| Vihtavuori N540 | <<locked>> | 80% | 27,659 psi | 60% | 1857 fps | 96.6% |
| Winchester 6.5 StaBALL | <<locked>> | 96% | 35,404 psi | 76% | 1998 fps | 95% |
| Winchester 748 | <<locked>> | 80% | 31,734 psi | 68% | 1969 fps | 96.6% |
| Winchester StaBALL Match | <<locked>> | 84% | 33,127 psi | 71% | 1985 fps | 95.2% |
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 86 powders for .338 Marlin Express loaded with the .338 | 250gr | Nosler Partition RN. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,188 fps; across all powders the maximum-charge window runs from 1,299 fps to 2,188 fps. Accurate 4350 gives the best case fill at 100 %, and 86 of the 86 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (320 MPa), the top charges use 70–90 %, leaving at least 10 % headroom. The 250.0 gr projectile in 0.338" calls for a 1:15.5 twist; slower twists will usually not stabilise this weight. Accurate 4350, Alliant Reloder-16, Hodgdon Hybrid 100V 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 | Nosler Partition RN they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate 4350, Alliant Reloder-16, Hodgdon H380 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.