Load Specifications
Load data in caliber .308 Marlin Express with .308 | 150gr | Hornady ECX bullet and 40 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Accurate 2520, Alliant AR-Comp and ADI AR 2219.
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>> | 96% | 43,120 psi | 90% | 2507 fps | 99.6% |
| Accurate 2460 | <<locked>> | 92% | 41,466 psi | 87% | 2500 fps | 97.1% |
| Accurate 2495ᴾ | <<locked>> | 100% | 36,666 psi | 77% | 2470 fps | 99% |
| Accurate 2520 | <<locked>> | 96% | 41,510 psi | 87% | 2539 fps | 96.7% |
| Accurate 4064ᴾ | <<locked>> | 100% | 34,214 psi | 71% | 2434 fps | 96.1% |
| Accurate LT-30 | <<locked>> | 86% | 42,090 psi | 88% | 2398 fps | 98.5% |
| Accurate LT-32 | <<locked>> | 86% | 42,511 psi | 89% | 2405 fps | 96.8% |
| ADI AR 2207 | <<locked>> | 84% | 41,350 psi | 86% | 2448 fps | 100% |
| ADI AR 2219 | <<locked>> | 88% | 41,684 psi | 87% | 2516 fps | 98.3% |
| Alliant AR-Comp | <<locked>> | 98% | 42,409 psi | 89% | 2575 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 90% | 41,452 psi | 87% | 2490 fps | 99.9% |
| Alliant Reloder-7 | <<locked>> | 84% | 42,714 psi | 89% | 2451 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 88% | 42,801 psi | 89% | 2434 fps | 98.8% |
| Hodgdon H322 | <<locked>> | 92% | 43,163 psi | 90% | 2543 fps | 98.6% |
| Hodgdon H335 | <<locked>> | 90% | 40,988 psi | 86% | 2510 fps | 97.2% |
| Hodgdon H4198 | <<locked>> | 82% | 40,973 psi | 86% | 2388 fps | 97.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 31,604 psi | 66% | 1549 fps | 100% |
| IMR 3031ᴾ | <<locked>> | 100% | 42,975 psi | 90% | 2602 fps | 99.2% |
| IMR 4198 | <<locked>> | 88% | 41,089 psi | 86% | 2434 fps | 100% |
| Lovex D073.4 | <<locked>> | 86% | 42,090 psi | 88% | 2510 fps | 96.6% |
| Lovex D073.6ᴾ | <<locked>> | 100% | 41,640 psi | 87% | 2552 fps | 96.8% |
| Norma 200 | <<locked>> | 86% | 41,234 psi | 86% | 2470 fps | 100% |
| Norma 202 | <<locked>> | 98% | 40,930 psi | 86% | 2513 fps | 97.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 31,560 psi | 66% | 1588 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 92% | 42,801 psi | 89% | 2513 fps | 96.5% |
| Rottweil R 901 | <<locked>> | 96% | 42,482 psi | 89% | 2503 fps | 97.4% |
| Shooters World AR Plus | <<locked>> | 86% | 42,090 psi | 88% | 2510 fps | 96.6% |
| Shooters World Match Rifleᴾ | <<locked>> | 100% | 41,640 psi | 87% | 2552 fps | 96.8% |
| SNPE Vectan BA6 1/2 | <<locked>> | 82% | 41,974 psi | 88% | 2221 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 88% | 42,076 psi | 88% | 2520 fps | 97.4% |
| SNPE Vectan SP 3 | <<locked>> | 90% | 42,569 psi | 89% | 2497 fps | 99.1% |
| SNPE Vectan Tubal 3000 | <<locked>> | 96% | 42,192 psi | 88% | 2438 fps | 97.3% |
| SNPE Vectan Tubal 5000ᴾ | <<locked>> | 100% | 38,043 psi | 79% | 2379 fps | 97.4% |
| Somchem S335 | <<locked>> | 98% | 43,062 psi | 90% | 2480 fps | 98.4% |
| Vihtavuori N120 | <<locked>> | 84% | 41,524 psi | 87% | 2408 fps | 100% |
| Vihtavuori N130 | <<locked>> | 92% | 42,409 psi | 89% | 2451 fps | 99.8% |
| Vihtavuori N133 | <<locked>> | 96% | 41,495 psi | 87% | 2444 fps | 99.3% |
| Vihtavuori N135ᴾ | <<locked>> | 100% | 38,580 psi | 81% | 2484 fps | 99.2% |
| Vihtavuori N140ᴾ | <<locked>> | 100% | 41,611 psi | 87% | 2497 fps | 97.7% |
| Vihtavuori N540ᴾ | <<locked>> | 100% | 39,958 psi | 83% | 2484 fps | 96.8% |
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% | 25,730 psi | 54% | 2139 fps | 95.1% |
| Accurate 2460 | <<locked>> | 88% | 36,013 psi | 75% | 2395 fps | 95.6% |
| Accurate 2495 | <<locked>> | 90% | 25,846 psi | 54% | 2228 fps | 95.8% |
| Accurate 2520 | 36.7 gr | 92% | 35,940 psi | 75% | 2434 fps | 95.1% |
| Accurate 4064 | <<locked>> | 98% | 31,778 psi | 66% | 2382 fps | 95.3% |
| Accurate LT-30 | <<locked>> | 80% | 34,882 psi | 73% | 2260 fps | 96.8% |
| Accurate LT-32 | <<locked>> | 82% | 37,449 psi | 78% | 2310 fps | 95.4% |
| ADI AR 2207 | <<locked>> | 80% | 36,463 psi | 76% | 2362 fps | 100% |
| ADI AR 2219 | 31.2 gr | 80% | 31,894 psi | 67% | 2313 fps | 95.5% |
| Alliant AR-Comp | 29.2 gr | 80% | 23,801 psi | 50% | 2146 fps | 96.7% |
| Alliant Reloder-10x | <<locked>> | 80% | 30,066 psi | 63% | 2260 fps | 98% |
| Alliant Reloder-7 | <<locked>> | 80% | 37,536 psi | 78% | 2356 fps | 99.7% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 32,851 psi | 69% | 2244 fps | 96.5% |
| Hodgdon H322 | <<locked>> | 82% | 31,372 psi | 66% | 2300 fps | 95.3% |
| Hodgdon H335 | <<locked>> | 86% | 35,810 psi | 75% | 2408 fps | 95.7% |
| Hodgdon H4198 | <<locked>> | 80% | 38,595 psi | 81% | 2346 fps | 97.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 23,279 psi | 49% | 1385 fps | 100% |
| IMR 3031 | <<locked>> | 88% | 29,327 psi | 61% | 2306 fps | 95.4% |
| IMR 4198 | <<locked>> | 80% | 32,430 psi | 68% | 2264 fps | 99.2% |
| Lovex D073.4 | <<locked>> | 82% | 36,506 psi | 76% | 2405 fps | 95% |
| Lovex D073.6 | <<locked>> | 96% | 36,347 psi | 76% | 2454 fps | 95.2% |
| Norma 200 | <<locked>> | 80% | 34,055 psi | 71% | 2336 fps | 99.4% |
| Norma 202 | <<locked>> | 92% | 33,881 psi | 71% | 2372 fps | 95.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 23,090 psi | 48% | 1417 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 88% | 37,695 psi | 79% | 2418 fps | 95.1% |
| Rottweil R 901 | <<locked>> | 90% | 35,288 psi | 74% | 2362 fps | 95.4% |
| Shooters World AR Plus | <<locked>> | 82% | 36,506 psi | 76% | 2405 fps | 95% |
| Shooters World Match Rifle | <<locked>> | 96% | 36,347 psi | 76% | 2454 fps | 95.2% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 39,856 psi | 83% | 2188 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 82% | 34,330 psi | 72% | 2369 fps | 95.2% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 30,980 psi | 65% | 2264 fps | 96.3% |
| SNPE Vectan Tubal 3000 | <<locked>> | 90% | 35,070 psi | 73% | 2303 fps | 95.4% |
| SNPE Vectan Tubal 5000 | <<locked>> | 94% | 31,763 psi | 66% | 2251 fps | 95.4% |
| Somchem S335 | <<locked>> | 88% | 31,560 psi | 66% | 2254 fps | 95.3% |
| Vihtavuori N120 | <<locked>> | 80% | 36,666 psi | 77% | 2326 fps | 100% |
| Vihtavuori N130 | <<locked>> | 80% | 29,196 psi | 61% | 2185 fps | 97.4% |
| Vihtavuori N133 | <<locked>> | 82% | 26,963 psi | 56% | 2139 fps | 95.3% |
| Vihtavuori N135 | <<locked>> | 88% | 26,455 psi | 55% | 2205 fps | 95.5% |
| Vihtavuori N140 | <<locked>> | 94% | 34,287 psi | 72% | 2352 fps | 95.6% |
| Vihtavuori N540 | <<locked>> | 96% | 35,259 psi | 74% | 2392 fps | 95.3% |
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 40 powders for .308 Marlin Express loaded with the .308 | 150gr | Hornady ECX. IMR 3031 delivers the highest muzzle velocity at 2,602 fps; across all powders the maximum-charge window runs from 1,549 fps to 2,602 fps. Accurate 2495 gives the best case fill at 100 %, and 40 of the 40 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (330 MPa), the top charges use 66–90 %, leaving at least 10 % headroom. The 150.0 gr projectile in 0.308" calls for a 1:13.0 twist; slower twists will usually not stabilise this weight. Accurate 2495, Accurate 4064, Hodgdon TrailBoss 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. Accurate 2520, Alliant AR-Comp, ADI AR 2219 rank at the top here: for .308 Marlin Express with the .308 | 150gr | Hornady ECX 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.