Load Specifications
Load data in caliber .338 Marlin Express with .338 | 200gr | Alaska Bullet Works Kodiak SP SPBC bullet and 45 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 Alliant AR-Comp.
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>> | 90% | 40,480 psi | 87% | 2320 fps | 99.8% |
| Accurate 2460 | <<locked>> | 88% | 41,147 psi | 89% | 2356 fps | 98.1% |
| Accurate 2495 | <<locked>> | 98% | 40,277 psi | 87% | 2388 fps | 99.9% |
| Accurate 2520 | <<locked>> | 92% | 41,176 psi | 89% | 2398 fps | 97.8% |
| Accurate 4064ᴾ | <<locked>> | 100% | 40,030 psi | 86% | 2405 fps | 98.7% |
| Accurate LT-30 | <<locked>> | 82% | 40,872 psi | 88% | 2247 fps | 99.1% |
| Accurate LT-32 | <<locked>> | 82% | 41,263 psi | 89% | 2254 fps | 97.6% |
| ADI AR 2219 | <<locked>> | 84% | 40,944 psi | 88% | 2369 fps | 99.1% |
| Alliant AR-Comp | <<locked>> | 92% | 39,639 psi | 85% | 2385 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 86% | 41,220 psi | 89% | 2343 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 84% | 41,466 psi | 89% | 2283 fps | 99.3% |
| Hodgdon Benchmark | <<locked>> | 88% | 40,001 psi | 86% | 2287 fps | 96.2% |
| Hodgdon BL-C2 | <<locked>> | 94% | 41,887 psi | 90% | 2428 fps | 96.8% |
| Hodgdon H322 | <<locked>> | 86% | 39,827 psi | 86% | 2349 fps | 98.9% |
| Hodgdon H335 | <<locked>> | 86% | 40,335 psi | 87% | 2365 fps | 98.2% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 32,576 psi | 70% | 1470 fps | 100% |
| IMR 3031 | <<locked>> | 94% | 40,103 psi | 86% | 2415 fps | 99.5% |
| IMR 4198 | <<locked>> | 84% | 40,509 psi | 87% | 2287 fps | 100% |
| Lovex D073.4 | <<locked>> | 82% | 41,539 psi | 90% | 2365 fps | 97.6% |
| Lovex D073.5 | <<locked>> | 88% | 41,017 psi | 88% | 2356 fps | 96.9% |
| Lovex D073.6 | <<locked>> | 94% | 39,001 psi | 84% | 2372 fps | 97.3% |
| Lovex S062 | <<locked>> | 98% | 41,118 psi | 89% | 2372 fps | 96% |
| Norma 200 | <<locked>> | 82% | 41,278 psi | 89% | 2323 fps | 100% |
| Norma 201 | <<locked>> | 94% | 41,104 psi | 89% | 2352 fps | 96% |
| Norma 202 | <<locked>> | 94% | 41,060 psi | 88% | 2379 fps | 98.4% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 32,576 psi | 70% | 1506 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 86% | 39,624 psi | 85% | 2326 fps | 97% |
| ReloadSwiss RS 60ᴾ | <<locked>> | 100% | 39,262 psi | 85% | 2411 fps | 95.9% |
| Rottweil R 901 | <<locked>> | 90% | 40,059 psi | 86% | 2323 fps | 97.9% |
| Rottweil R 902 | <<locked>> | 96% | 41,365 psi | 89% | 2349 fps | 96% |
| Shooters World AR Plus | <<locked>> | 82% | 41,539 psi | 90% | 2365 fps | 97.6% |
| Shooters World Match Rifle | <<locked>> | 94% | 39,001 psi | 84% | 2372 fps | 97.3% |
| Shooters World Precision | <<locked>> | 98% | 41,118 psi | 89% | 2372 fps | 96% |
| SNPE Vectan SP 10 | <<locked>> | 84% | 41,278 psi | 89% | 2372 fps | 98.3% |
| SNPE Vectan SP 3 | <<locked>> | 86% | 41,756 psi | 90% | 2346 fps | 99.6% |
| SNPE Vectan Tubal 3000 | <<locked>> | 92% | 41,611 psi | 90% | 2297 fps | 98.3% |
| SNPE Vectan Tubal 5000 | <<locked>> | 98% | 39,929 psi | 86% | 2287 fps | 98.8% |
| Somchem S321 | <<locked>> | 88% | 39,784 psi | 86% | 2352 fps | 95.9% |
| Somchem S335 | <<locked>> | 92% | 40,190 psi | 87% | 2297 fps | 98.8% |
| Vihtavuori N130 | <<locked>> | 88% | 41,785 psi | 90% | 2300 fps | 100% |
| Vihtavuori N133 | <<locked>> | 92% | 41,046 psi | 88% | 2303 fps | 99.8% |
| Vihtavuori N135 | <<locked>> | 98% | 41,307 psi | 89% | 2388 fps | 99.9% |
| Vihtavuori N140 | <<locked>> | 96% | 41,263 psi | 89% | 2359 fps | 98.6% |
| Vihtavuori N540 | <<locked>> | 96% | 39,726 psi | 86% | 2349 fps | 97.9% |
| Winchester 748 | <<locked>> | 92% | 40,582 psi | 87% | 2398 fps | 96.7% |
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% | 29,660 psi | 64% | 2110 fps | 97.9% |
| Accurate 2460 | <<locked>> | 80% | 31,705 psi | 68% | 2172 fps | 95.5% |
| Accurate 2495 | <<locked>> | 80% | 22,249 psi | 48% | 1995 fps | 95.3% |
| Accurate 2520 | <<locked>> | 86% | 33,402 psi | 72% | 2251 fps | 95.7% |
| Accurate 4064 | <<locked>> | 90% | 29,167 psi | 63% | 2185 fps | 95.6% |
| Accurate LT-30 | <<locked>> | 80% | 38,348 psi | 83% | 2205 fps | 98.7% |
| Accurate LT-32 | <<locked>> | 80% | 38,740 psi | 83% | 2208 fps | 97.1% |
| ADI AR 2219 | <<locked>> | 80% | 35,766 psi | 77% | 2274 fps | 98.1% |
| Alliant AR-Comp | 34.8 gr | 80% | 27,238 psi | 59% | 2126 fps | 99.2% |
| Alliant Reloder-10x | <<locked>> | 80% | 34,156 psi | 74% | 2215 fps | 99.6% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 36,622 psi | 79% | 2198 fps | 98.6% |
| Hodgdon Benchmark | <<locked>> | 86% | 37,942 psi | 82% | 2247 fps | 95.6% |
| Hodgdon BL-C2 | <<locked>> | 90% | 36,709 psi | 79% | 2329 fps | 95.4% |
| Hodgdon H322 | <<locked>> | 80% | 32,793 psi | 71% | 2208 fps | 97.2% |
| Hodgdon H335 | <<locked>> | 80% | 32,982 psi | 71% | 2221 fps | 96.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 24,105 psi | 52% | 1312 fps | 100% |
| IMR 3031 | 34.7 gr | 80% | 25,947 psi | 56% | 2093 fps | 95.3% |
| IMR 4198 | <<locked>> | 80% | 35,810 psi | 77% | 2201 fps | 100% |
| Lovex D073.4 | <<locked>> | 80% | 38,638 psi | 83% | 2313 fps | 96.9% |
| Lovex D073.5 | <<locked>> | 84% | 35,911 psi | 77% | 2260 fps | 95.5% |
| Lovex D073.6 | <<locked>> | 88% | 32,024 psi | 69% | 2234 fps | 95.2% |
| Lovex S062 | <<locked>> | 96% | 38,856 psi | 84% | 2329 fps | 95.4% |
| Norma 200 | <<locked>> | 80% | 38,754 psi | 84% | 2280 fps | 100% |
| Norma 201 | <<locked>> | 92% | 38,580 psi | 83% | 2306 fps | 95.2% |
| Norma 202 | <<locked>> | 84% | 29,805 psi | 64% | 2152 fps | 95.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 23,975 psi | 52% | 1345 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 34,896 psi | 75% | 2234 fps | 95.6% |
| ReloadSwiss RS 60 | <<locked>> | 98% | 36,999 psi | 80% | 2362 fps | 95% |
| Rottweil R 901 | <<locked>> | 82% | 31,720 psi | 68% | 2152 fps | 95.5% |
| Rottweil R 902 | <<locked>> | 94% | 38,841 psi | 84% | 2303 fps | 95.3% |
| Shooters World AR Plus | <<locked>> | 80% | 38,638 psi | 83% | 2313 fps | 96.9% |
| Shooters World Match Rifle | <<locked>> | 88% | 32,024 psi | 69% | 2234 fps | 95.2% |
| Shooters World Precision | <<locked>> | 96% | 38,856 psi | 84% | 2329 fps | 95.4% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 36,201 psi | 78% | 2277 fps | 97.1% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 34,737 psi | 75% | 2218 fps | 98.5% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 30,530 psi | 66% | 2083 fps | 95.1% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 27,847 psi | 60% | 2041 fps | 95.3% |
| Somchem S321 | <<locked>> | 86% | 37,130 psi | 80% | 2303 fps | 95.1% |
| Somchem S335 | <<locked>> | 80% | 28,137 psi | 61% | 2047 fps | 95.3% |
| Vihtavuori N130 | <<locked>> | 80% | 32,808 psi | 71% | 2139 fps | 99.2% |
| Vihtavuori N133 | <<locked>> | 80% | 28,529 psi | 61% | 2057 fps | 97.3% |
| Vihtavuori N135 | <<locked>> | 80% | 23,772 psi | 51% | 2008 fps | 95.6% |
| Vihtavuori N140 | <<locked>> | 86% | 30,168 psi | 65% | 2139 fps | 95.5% |
| Vihtavuori N540 | <<locked>> | 88% | 30,835 psi | 66% | 2169 fps | 95.2% |
| Winchester 748 | 41.4 gr | 88% | 35,650 psi | 77% | 2300 fps | 95.1% |
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 78 powders for .338 Marlin Express loaded with the .338 | 200gr | Alaska Bullet Works Kodiak SP SPBC. ReloadSwiss RS 52 delivers the highest muzzle velocity at 2,444 fps; across all powders the maximum-charge window runs from 1,470 fps to 2,444 fps. Accurate 4064 gives the best case fill at 100 %, and 78 of the 78 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 200.0 gr projectile in 0.338" calls for a 1:16.0 twist; slower twists will usually not stabilise this weight. Accurate 4064, Alliant Reloder- TS 15.5, Alliant Reloder-17 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, Alliant AR-Comp rank at the top here: for .338 Marlin Express with the .338 | 200gr | Alaska Bullet Works Kodiak SP SPBC they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate 2200, Accurate 2230, ADI AR 2206H 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.