Load Specifications
Load data in caliber .338 Marlin Express with .338 | 200gr | Hornady InterLock FP bullet and 50 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 60, IMR 3031 and Hodgdon BL-C2.
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% | 41,814 psi | 90% | 2382 fps | 100% |
| Accurate 2460 | <<locked>> | 84% | 39,958 psi | 86% | 2375 fps | 98.5% |
| Accurate 2495 | <<locked>> | 94% | 39,653 psi | 85% | 2411 fps | 100% |
| Accurate 2520 | <<locked>> | 88% | 39,987 psi | 86% | 2415 fps | 98.2% |
| Accurate 4064 | <<locked>> | 96% | 39,697 psi | 86% | 2434 fps | 99.1% |
| ADI AR 2219 | <<locked>> | 82% | 41,829 psi | 90% | 2425 fps | 99.5% |
| ADI Benchmark 8208 | <<locked>> | 88% | 40,872 psi | 88% | 2388 fps | 96.6% |
| Alliant AR-Comp | <<locked>> | 90% | 41,060 psi | 88% | 2444 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 84% | 40,843 psi | 88% | 2464 fps | 96% |
| Alliant Reloder- TS 15.5 | <<locked>> | 96% | 39,639 psi | 85% | 2421 fps | 96% |
| Alliant Reloder-10x | <<locked>> | 82% | 39,668 psi | 85% | 2352 fps | 100% |
| Bofors RP3 | <<locked>> | 98% | 41,597 psi | 90% | 2470 fps | 96.6% |
| Hodgdon Benchmark | <<locked>> | 86% | 40,872 psi | 88% | 2346 fps | 97.2% |
| Hodgdon BL-C2 | <<locked>> | 90% | 40,611 psi | 88% | 2444 fps | 97.3% |
| Hodgdon H322 | <<locked>> | 84% | 40,988 psi | 88% | 2411 fps | 99.5% |
| Hodgdon H335 | <<locked>> | 84% | 41,350 psi | 89% | 2425 fps | 98.9% |
| Hodgdon H4895 | <<locked>> | 90% | 41,234 psi | 89% | 2431 fps | 96% |
| Hodgdon LEVERevolution | <<locked>> | 94% | 41,829 psi | 90% | 2487 fps | 96.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 33,344 psi | 72% | 1519 fps | 100% |
| IMR 3031 | <<locked>> | 92% | 41,698 psi | 90% | 2484 fps | 99.9% |
| IMR 4198 | <<locked>> | 82% | 41,278 psi | 89% | 2336 fps | 100% |
| IMR 8208 XBR | <<locked>> | 88% | 40,872 psi | 88% | 2388 fps | 96.6% |
| Lovex D073.5 | <<locked>> | 84% | 39,639 psi | 85% | 2372 fps | 97.3% |
| Lovex D073.6 | <<locked>> | 92% | 40,872 psi | 88% | 2441 fps | 98.4% |
| Lovex S062 | <<locked>> | 94% | 40,350 psi | 87% | 2398 fps | 96.6% |
| Norma 201 | <<locked>> | 90% | 39,972 psi | 86% | 2375 fps | 96.5% |
| Norma 202 | <<locked>> | 90% | 39,726 psi | 86% | 2395 fps | 98.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 33,344 psi | 72% | 1555 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 84% | 40,567 psi | 87% | 2385 fps | 97.9% |
| ReloadSwiss RS 60 | <<locked>> | 98% | 40,669 psi | 88% | 2500 fps | 97.6% |
| Rottweil R 901 | <<locked>> | 88% | 41,423 psi | 89% | 2385 fps | 98.7% |
| Rottweil R 902 | <<locked>> | 92% | 40,219 psi | 87% | 2372 fps | 96.5% |
| Rottweil R 903ᴾ | <<locked>> | 100% | 41,263 psi | 89% | 2457 fps | 96.2% |
| Shooters World Match Rifle | <<locked>> | 92% | 40,872 psi | 88% | 2441 fps | 98.4% |
| Shooters World Precision | <<locked>> | 94% | 40,350 psi | 87% | 2398 fps | 96.6% |
| Shooters World Tactical Rifle | <<locked>> | 82% | 40,625 psi | 88% | 2349 fps | 96.1% |
| SNPE Vectan SP 3 | <<locked>> | 82% | 40,335 psi | 87% | 2359 fps | 99.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 88% | 40,001 psi | 86% | 2313 fps | 98.6% |
| SNPE Vectan Tubal 5000 | <<locked>> | 96% | 41,220 psi | 89% | 2349 fps | 99.4% |
| Somchem S321 | <<locked>> | 86% | 40,828 psi | 88% | 2415 fps | 97% |
| Somchem S335 | <<locked>> | 90% | 41,495 psi | 89% | 2359 fps | 99.4% |
| Vihtavuori N130 | <<locked>> | 84% | 40,408 psi | 87% | 2316 fps | 100% |
| Vihtavuori N133 | <<locked>> | 88% | 39,682 psi | 86% | 2320 fps | 99.9% |
| Vihtavuori N135 | <<locked>> | 94% | 40,698 psi | 88% | 2415 fps | 100% |
| Vihtavuori N140 | <<locked>> | 92% | 40,190 psi | 87% | 2382 fps | 99% |
| Vihtavuori N150ᴾ | <<locked>> | 100% | 41,162 psi | 89% | 2411 fps | 97.3% |
| Vihtavuori N530 | <<locked>> | 88% | 40,654 psi | 88% | 2382 fps | 96.6% |
| Vihtavuori N540 | <<locked>> | 94% | 41,046 psi | 88% | 2415 fps | 98.7% |
| Winchester 748 | <<locked>> | 90% | 41,669 psi | 90% | 2464 fps | 97.8% |
| Winchester StaBALL Match | <<locked>> | 92% | 40,973 psi | 88% | 2434 fps | 95.8% |
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% | 32,532 psi | 70% | 2208 fps | 99.1% |
| Accurate 2460 | <<locked>> | 80% | 34,882 psi | 75% | 2277 fps | 97.3% |
| Accurate 2495 | <<locked>> | 80% | 25,092 psi | 54% | 2100 fps | 97.4% |
| Accurate 2520 | <<locked>> | 80% | 30,472 psi | 66% | 2221 fps | 95.4% |
| Accurate 4064 | <<locked>> | 84% | 27,021 psi | 58% | 2159 fps | 95.4% |
| ADI AR 2219 | <<locked>> | 80% | 39,117 psi | 84% | 2379 fps | 99.2% |
| ADI Benchmark 8208 | <<locked>> | 84% | 35,998 psi | 78% | 2297 fps | 95.1% |
| Alliant AR-Comp | <<locked>> | 80% | 29,950 psi | 65% | 2228 fps | 99.9% |
| Alliant Power Pro 1200-R | <<locked>> | 82% | 38,218 psi | 82% | 2411 fps | 95.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 94% | 37,376 psi | 81% | 2379 fps | 95.3% |
| Alliant Reloder-10x | <<locked>> | 80% | 37,376 psi | 81% | 2310 fps | 100% |
| Bofors RP3 | <<locked>> | 94% | 36,376 psi | 78% | 2372 fps | 95.1% |
| Hodgdon Benchmark | <<locked>> | 80% | 34,127 psi | 74% | 2211 fps | 95.2% |
| Hodgdon BL-C2 | 44 gr | 84% | 33,243 psi | 72% | 2297 fps | 95% |
| Hodgdon H322 | <<locked>> | 80% | 35,897 psi | 77% | 2316 fps | 98.6% |
| Hodgdon H335 | <<locked>> | 80% | 36,114 psi | 78% | 2323 fps | 97.8% |
| Hodgdon H4895 | <<locked>> | 88% | 38,682 psi | 83% | 2382 fps | 95.2% |
| Hodgdon LEVERevolution | <<locked>> | 92% | 39,334 psi | 85% | 2438 fps | 95.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 24,700 psi | 53% | 1358 fps | 100% |
| IMR 3031 | 38 gr | 80% | 28,514 psi | 61% | 2201 fps | 97.3% |
| IMR 4198 | <<locked>> | 80% | 38,856 psi | 84% | 2293 fps | 100% |
| IMR 8208 XBR | <<locked>> | 84% | 35,998 psi | 78% | 2297 fps | 95.1% |
| Lovex D073.5 | <<locked>> | 80% | 34,621 psi | 75% | 2274 fps | 95.9% |
| Lovex D073.6 | <<locked>> | 84% | 31,314 psi | 67% | 2251 fps | 95.7% |
| Lovex S062 | <<locked>> | 90% | 35,708 psi | 77% | 2310 fps | 95.2% |
| Norma 201 | <<locked>> | 86% | 35,433 psi | 76% | 2287 fps | 95.1% |
| Norma 202 | <<locked>> | 80% | 29,051 psi | 63% | 2165 fps | 95.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 24,598 psi | 53% | 1388 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 35,723 psi | 77% | 2290 fps | 96.7% |
| ReloadSwiss RS 60 | 48.5 gr | 94% | 35,723 psi | 77% | 2392 fps | 95.7% |
| Rottweil R 901 | <<locked>> | 80% | 32,764 psi | 71% | 2211 fps | 96.6% |
| Rottweil R 902 | <<locked>> | 88% | 35,607 psi | 77% | 2283 fps | 95.1% |
| Rottweil R 903 | <<locked>> | 98% | 38,812 psi | 84% | 2411 fps | 95.5% |
| Shooters World Match Rifle | <<locked>> | 84% | 31,314 psi | 67% | 2251 fps | 95.7% |
| Shooters World Precision | <<locked>> | 90% | 35,708 psi | 77% | 2310 fps | 95.2% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 37,811 psi | 81% | 2297 fps | 95.2% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 37,942 psi | 82% | 2316 fps | 99.5% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 31,343 psi | 68% | 2139 fps | 96.3% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 26,934 psi | 58% | 2054 fps | 95.7% |
| Somchem S321 | <<locked>> | 82% | 35,752 psi | 77% | 2316 fps | 95.5% |
| Somchem S335 | <<locked>> | 80% | 30,676 psi | 66% | 2146 fps | 97% |
| Vihtavuori N130 | <<locked>> | 80% | 35,723 psi | 77% | 2231 fps | 99.8% |
| Vihtavuori N133 | <<locked>> | 80% | 31,096 psi | 67% | 2152 fps | 98.7% |
| Vihtavuori N135 | <<locked>> | 80% | 26,194 psi | 56% | 2110 fps | 97.5% |
| Vihtavuori N140 | <<locked>> | 80% | 27,514 psi | 59% | 2110 fps | 95.2% |
| Vihtavuori N150 | <<locked>> | 94% | 34,084 psi | 73% | 2277 fps | 95.1% |
| Vihtavuori N530 | <<locked>> | 84% | 35,897 psi | 77% | 2290 fps | 95.2% |
| Vihtavuori N540 | <<locked>> | 84% | 29,892 psi | 64% | 2185 fps | 95.6% |
| Winchester 748 | <<locked>> | 84% | 34,243 psi | 74% | 2316 fps | 95.6% |
| Winchester StaBALL Match | <<locked>> | 90% | 38,522 psi | 83% | 2388 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 50 powders for .338 Marlin Express loaded with the .338 | 200gr | Hornady InterLock FP. ReloadSwiss RS 60 delivers the highest muzzle velocity at 2,500 fps; across all powders the maximum-charge window runs from 1,519 fps to 2,500 fps. Hodgdon TrailBoss gives the best case fill at 100 %, and 50 of the 50 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (320 MPa), the top charges use 72–90 %, leaving at least 10 % headroom. 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. ReloadSwiss RS 60, IMR 3031, Hodgdon BL-C2 rank at the top here: for .338 Marlin Express with the .338 | 200gr | Hornady InterLock FP 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.