Load Specifications
Load data in caliber .338 Marlin Express with .338 | 200gr | NorthFork Bonded Core bullet and 48 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are IMR 3031, Lovex D073.6 and Shooters World Match Rifle.
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% | 41,481 psi | 89% | 2349 fps | 99.9% |
| Accurate 2460 | <<locked>> | 86% | 39,523 psi | 85% | 2339 fps | 98% |
| Accurate 2495 | <<locked>> | 98% | 41,553 psi | 90% | 2418 fps | 100% |
| Accurate 2520 | <<locked>> | 90% | 39,450 psi | 85% | 2379 fps | 97.6% |
| Accurate 4064ᴾ | <<locked>> | 100% | 41,249 psi | 89% | 2434 fps | 99% |
| Accurate LT-30 | <<locked>> | 82% | 41,539 psi | 90% | 2270 fps | 99.3% |
| Accurate LT-32 | <<locked>> | 82% | 41,959 psi | 90% | 2280 fps | 98% |
| ADI AR 2219 | <<locked>> | 84% | 41,887 psi | 90% | 2395 fps | 99.3% |
| ADI Benchmark 8208 | <<locked>> | 90% | 40,669 psi | 88% | 2352 fps | 95.9% |
| Alliant AR-Comp | <<locked>> | 92% | 40,567 psi | 87% | 2411 fps | 100% |
| Alliant Reloder- TS 15.5ᴾ | <<locked>> | 100% | 41,553 psi | 90% | 2425 fps | 95.9% |
| Alliant Reloder-10x | <<locked>> | 84% | 39,465 psi | 85% | 2323 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 82% | 39,885 psi | 86% | 2267 fps | 99.2% |
| Bofors RP3ᴾ | <<locked>> | 100% | 40,930 psi | 88% | 2428 fps | 95.9% |
| Hodgdon Benchmark | <<locked>> | 88% | 41,133 psi | 89% | 2320 fps | 96.7% |
| Hodgdon BL-C2 | <<locked>> | 92% | 40,379 psi | 87% | 2411 fps | 96.7% |
| Hodgdon H322 | <<locked>> | 86% | 40,770 psi | 88% | 2375 fps | 99.1% |
| Hodgdon H335 | <<locked>> | 86% | 41,437 psi | 89% | 2395 fps | 98.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 32,880 psi | 71% | 1486 fps | 100% |
| IMR 3031 | <<locked>> | 94% | 41,278 psi | 89% | 2444 fps | 99.7% |
| IMR 4198 | <<locked>> | 84% | 41,060 psi | 88% | 2303 fps | 100% |
| IMR 8208 XBR | <<locked>> | 90% | 40,669 psi | 88% | 2352 fps | 95.9% |
| Lovex D073.5 | <<locked>> | 86% | 39,349 psi | 85% | 2336 fps | 96.7% |
| Lovex D073.6 | <<locked>> | 94% | 40,118 psi | 86% | 2402 fps | 97.8% |
| Lovex S062 | <<locked>> | 96% | 39,639 psi | 85% | 2356 fps | 95.8% |
| Norma 201 | <<locked>> | 92% | 39,697 psi | 86% | 2339 fps | 95.8% |
| Norma 202 | <<locked>> | 94% | 41,930 psi | 90% | 2402 fps | 98.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 32,880 psi | 71% | 1522 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 86% | 40,480 psi | 87% | 2352 fps | 97.4% |
| ReloadSwiss RS 60ᴾ | <<locked>> | 100% | 40,219 psi | 87% | 2448 fps | 96.6% |
| Rottweil R 901 | <<locked>> | 90% | 41,046 psi | 88% | 2349 fps | 98.3% |
| Rottweil R 902 | <<locked>> | 94% | 39,929 psi | 86% | 2336 fps | 95.8% |
| Shooters World Match Rifle | <<locked>> | 94% | 40,118 psi | 86% | 2402 fps | 97.8% |
| Shooters World Precision | <<locked>> | 96% | 39,639 psi | 85% | 2356 fps | 95.8% |
| SNPE Vectan SP 10 | <<locked>> | 82% | 39,668 psi | 85% | 2352 fps | 98.1% |
| SNPE Vectan SP 3 | <<locked>> | 84% | 40,205 psi | 87% | 2329 fps | 99.5% |
| SNPE Vectan Tubal 3000 | <<locked>> | 90% | 39,885 psi | 86% | 2280 fps | 98.1% |
| SNPE Vectan Tubal 5000 | <<locked>> | 98% | 40,959 psi | 88% | 2316 fps | 99.1% |
| Somchem S321 | <<locked>> | 88% | 40,509 psi | 87% | 2379 fps | 96.3% |
| Somchem S335 | <<locked>> | 92% | 41,278 psi | 89% | 2326 fps | 99% |
| Vihtavuori N130 | <<locked>> | 86% | 40,219 psi | 87% | 2283 fps | 100% |
| Vihtavuori N133 | <<locked>> | 92% | 41,959 psi | 90% | 2326 fps | 99.9% |
| Vihtavuori N135 | <<locked>> | 96% | 39,900 psi | 86% | 2375 fps | 99.9% |
| Vihtavuori N140 | <<locked>> | 94% | 39,798 psi | 86% | 2346 fps | 98.5% |
| Vihtavuori N150ᴾ | <<locked>> | 100% | 38,276 psi | 82% | 2326 fps | 95.9% |
| Vihtavuori N530 | <<locked>> | 90% | 40,509 psi | 87% | 2349 fps | 96% |
| Vihtavuori N540 | <<locked>> | 96% | 40,640 psi | 88% | 2379 fps | 98.3% |
| Winchester 748 | <<locked>> | 92% | 41,553 psi | 90% | 2428 fps | 97.2% |
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% | 30,400 psi | 66% | 2136 fps | 98.3% |
| Accurate 2460 | <<locked>> | 80% | 32,343 psi | 70% | 2198 fps | 96% |
| Accurate 2495 | <<locked>> | 80% | 22,931 psi | 49% | 2021 fps | 95.9% |
| Accurate 2520 | <<locked>> | 84% | 32,140 psi | 69% | 2234 fps | 95.4% |
| Accurate 4064 | <<locked>> | 88% | 28,181 psi | 61% | 2169 fps | 95.4% |
| Accurate LT-30 | <<locked>> | 80% | 39,059 psi | 84% | 2228 fps | 98.9% |
| Accurate LT-32 | <<locked>> | 80% | 39,436 psi | 85% | 2234 fps | 97.4% |
| ADI AR 2219 | <<locked>> | 80% | 36,637 psi | 79% | 2300 fps | 98.4% |
| ADI Benchmark 8208 | <<locked>> | 88% | 38,276 psi | 82% | 2310 fps | 95.2% |
| Alliant AR-Comp | <<locked>> | 80% | 27,862 psi | 60% | 2149 fps | 99.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 98% | 39,059 psi | 84% | 2379 fps | 95.2% |
| Alliant Reloder-10x | <<locked>> | 80% | 34,969 psi | 75% | 2238 fps | 99.7% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 37,376 psi | 81% | 2221 fps | 98.8% |
| Bofors RP3 | <<locked>> | 98% | 38,319 psi | 83% | 2382 fps | 95.1% |
| Hodgdon Benchmark | <<locked>> | 84% | 36,289 psi | 78% | 2224 fps | 95.3% |
| Hodgdon BL-C2 | <<locked>> | 88% | 35,186 psi | 76% | 2310 fps | 95% |
| Hodgdon H322 | <<locked>> | 80% | 33,475 psi | 72% | 2234 fps | 97.6% |
| Hodgdon H335 | <<locked>> | 80% | 33,794 psi | 73% | 2247 fps | 96.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 24,279 psi | 52% | 1325 fps | 100% |
| IMR 3031 | 35.5 gr | 80% | 26,542 psi | 57% | 2119 fps | 95.8% |
| IMR 4198 | <<locked>> | 80% | 36,637 psi | 79% | 2228 fps | 100% |
| IMR 8208 XBR | <<locked>> | 88% | 38,276 psi | 82% | 2310 fps | 95.2% |
| Lovex D073.5 | <<locked>> | 82% | 34,519 psi | 74% | 2244 fps | 95.2% |
| Lovex D073.6 | 41.7 gr | 88% | 32,866 psi | 71% | 2260 fps | 95.7% |
| Lovex S062 | <<locked>> | 94% | 37,507 psi | 81% | 2316 fps | 95.2% |
| Norma 201 | <<locked>> | 90% | 37,333 psi | 80% | 2293 fps | 95.1% |
| Norma 202 | <<locked>> | 84% | 30,676 psi | 66% | 2182 fps | 95.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 24,134 psi | 52% | 1355 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 33,373 psi | 72% | 2211 fps | 95.3% |
| ReloadSwiss RS 60 | <<locked>> | 98% | 37,898 psi | 82% | 2398 fps | 95.7% |
| Rottweil R 901 | <<locked>> | 80% | 30,516 psi | 66% | 2133 fps | 95.2% |
| Rottweil R 902 | <<locked>> | 92% | 37,550 psi | 81% | 2290 fps | 95.1% |
| Shooters World Match Rifle | 41.7 gr | 88% | 32,866 psi | 71% | 2260 fps | 95.7% |
| Shooters World Precision | <<locked>> | 94% | 37,507 psi | 81% | 2316 fps | 95.2% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 37,101 psi | 80% | 2303 fps | 97.5% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 35,578 psi | 77% | 2244 fps | 98.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 31,372 psi | 68% | 2113 fps | 95.7% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 26,861 psi | 58% | 2024 fps | 95% |
| Somchem S321 | <<locked>> | 86% | 38,174 psi | 82% | 2333 fps | 95.6% |
| Somchem S335 | <<locked>> | 80% | 28,718 psi | 62% | 2073 fps | 95.7% |
| Vihtavuori N130 | <<locked>> | 80% | 33,562 psi | 72% | 2162 fps | 99.4% |
| Vihtavuori N133 | <<locked>> | 80% | 29,196 psi | 63% | 2080 fps | 97.7% |
| Vihtavuori N135 | <<locked>> | 80% | 24,381 psi | 53% | 2034 fps | 96.2% |
| Vihtavuori N140 | <<locked>> | 84% | 29,109 psi | 63% | 2123 fps | 95.3% |
| Vihtavuori N150 | <<locked>> | 98% | 35,984 psi | 78% | 2283 fps | 95.1% |
| Vihtavuori N530 | <<locked>> | 88% | 38,014 psi | 82% | 2303 fps | 95.2% |
| Vihtavuori N540 | <<locked>> | 88% | 31,488 psi | 68% | 2195 fps | 95.7% |
| Winchester 748 | <<locked>> | 88% | 36,550 psi | 79% | 2333 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 48 powders for .338 Marlin Express loaded with the .338 | 200gr | NorthFork Bonded Core. ReloadSwiss RS 60 delivers the highest muzzle velocity at 2,448 fps; across all powders the maximum-charge window runs from 1,486 fps to 2,448 fps. Accurate 4064 gives the best case fill at 100 %, and 48 of the 48 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 200.0 gr projectile in 0.338" calls for a 1:17.0 twist; slower twists will usually not stabilise this weight. Accurate 4064, Alliant Reloder- TS 15.5, Bofors RP3 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, Lovex D073.6, Shooters World Match Rifle rank at the top here: for .338 Marlin Express with the .338 | 200gr | NorthFork Bonded Core 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.