Load Specifications
Load data in caliber .308 Marlin Express with .311 | 150gr | Norma Semi Soft Point bullet and 42 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant AR-Comp, IMR 3031 and Accurate 2520.
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>> | 92% | 43,033 psi | 90% | 2533 fps | 99.8% |
| Accurate 2460 | <<locked>> | 88% | 41,292 psi | 86% | 2523 fps | 97.7% |
| Accurate 2495ᴾ | <<locked>> | 100% | 43,004 psi | 90% | 2602 fps | 99.9% |
| Accurate 2520 | <<locked>> | 92% | 41,263 psi | 86% | 2562 fps | 97.3% |
| Accurate 4064ᴾ | <<locked>> | 100% | 39,972 psi | 84% | 2569 fps | 98.2% |
| Accurate LT-30 | <<locked>> | 82% | 40,814 psi | 85% | 2411 fps | 98.7% |
| Accurate LT-32 | <<locked>> | 82% | 41,205 psi | 86% | 2418 fps | 97.1% |
| ADI AR 2207 | <<locked>> | 82% | 43,076 psi | 90% | 2497 fps | 100% |
| ADI AR 2219 | <<locked>> | 84% | 40,944 psi | 86% | 2536 fps | 98.7% |
| Alliant AR-Comp | <<locked>> | 94% | 42,235 psi | 88% | 2602 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 86% | 41,176 psi | 86% | 2513 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 84% | 41,597 psi | 87% | 2448 fps | 99% |
| Hodgdon Benchmark | <<locked>> | 90% | 42,772 psi | 89% | 2500 fps | 96.3% |
| Hodgdon BL-C2 | <<locked>> | 94% | 42,119 psi | 88% | 2598 fps | 96.3% |
| Hodgdon H322 | <<locked>> | 88% | 42,583 psi | 89% | 2569 fps | 98.9% |
| Hodgdon H335 | <<locked>> | 88% | 43,250 psi | 90% | 2582 fps | 98.3% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 32,590 psi | 68% | 1594 fps | 100% |
| IMR 3031 | <<locked>> | 96% | 42,975 psi | 90% | 2638 fps | 99.6% |
| IMR 4198 | <<locked>> | 86% | 42,583 psi | 89% | 2490 fps | 100% |
| Lovex D073.4 | <<locked>> | 82% | 41,669 psi | 87% | 2533 fps | 97.1% |
| Lovex D073.5 | <<locked>> | 88% | 41,060 psi | 86% | 2520 fps | 96.3% |
| Lovex D073.6 | <<locked>> | 96% | 42,003 psi | 88% | 2589 fps | 97.5% |
| Norma 200 | <<locked>> | 82% | 41,089 psi | 86% | 2490 fps | 100% |
| Norma 202 | <<locked>> | 94% | 40,857 psi | 85% | 2539 fps | 97.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 32,634 psi | 68% | 1634 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 88% | 42,250 psi | 88% | 2539 fps | 97.1% |
| Rottweil R 901 | <<locked>> | 92% | 42,743 psi | 89% | 2536 fps | 98% |
| Shooters World AR Plus | <<locked>> | 82% | 41,669 psi | 87% | 2533 fps | 97.1% |
| Shooters World Match Rifle | <<locked>> | 96% | 42,003 psi | 88% | 2589 fps | 97.5% |
| SNPE Vectan SP 10 | <<locked>> | 84% | 41,307 psi | 86% | 2539 fps | 97.8% |
| SNPE Vectan SP 3 | <<locked>> | 86% | 41,945 psi | 88% | 2520 fps | 99.4% |
| SNPE Vectan Tubal 3000 | <<locked>> | 92% | 41,611 psi | 87% | 2461 fps | 97.8% |
| SNPE Vectan Tubal 5000ᴾ | <<locked>> | 100% | 42,656 psi | 89% | 2497 fps | 98.9% |
| Somchem S321 | <<locked>> | 90% | 42,380 psi | 89% | 2566 fps | 96% |
| Somchem S335 | <<locked>> | 94% | 42,743 psi | 89% | 2503 fps | 98.8% |
| Vihtavuori N120 | <<locked>> | 82% | 43,192 psi | 90% | 2454 fps | 100% |
| Vihtavuori N130 | <<locked>> | 88% | 41,655 psi | 87% | 2464 fps | 99.9% |
| Vihtavuori N133 | <<locked>> | 92% | 41,104 psi | 86% | 2467 fps | 99.5% |
| Vihtavuori N135 | <<locked>> | 98% | 41,408 psi | 87% | 2559 fps | 99.8% |
| Vihtavuori N140 | <<locked>> | 96% | 41,437 psi | 87% | 2526 fps | 98.3% |
| Vihtavuori N540 | <<locked>> | 98% | 42,453 psi | 89% | 2562 fps | 98% |
| Winchester 748 | <<locked>> | 92% | 40,524 psi | 85% | 2562 fps | 96.1% |
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% | 29,602 psi | 62% | 2257 fps | 97.3% |
| Accurate 2460 | <<locked>> | 82% | 33,707 psi | 70% | 2372 fps | 95.5% |
| Accurate 2495 | <<locked>> | 82% | 23,656 psi | 49% | 2172 fps | 95.2% |
| Accurate 2520 | 37.2 gr | 86% | 33,547 psi | 70% | 2408 fps | 95% |
| Accurate 4064 | <<locked>> | 92% | 30,937 psi | 65% | 2379 fps | 95.5% |
| Accurate LT-30 | <<locked>> | 80% | 38,377 psi | 80% | 2365 fps | 98.3% |
| Accurate LT-32 | <<locked>> | 80% | 38,725 psi | 81% | 2369 fps | 96.5% |
| ADI AR 2207 | <<locked>> | 80% | 40,683 psi | 85% | 2457 fps | 100% |
| ADI AR 2219 | <<locked>> | 80% | 35,795 psi | 75% | 2434 fps | 97.5% |
| Alliant AR-Comp | 31.7 gr | 80% | 27,021 psi | 56% | 2267 fps | 98.7% |
| Alliant Reloder-10x | <<locked>> | 80% | 34,258 psi | 72% | 2375 fps | 99.3% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 36,506 psi | 76% | 2352 fps | 98.1% |
| Hodgdon Benchmark | <<locked>> | 88% | 40,045 psi | 84% | 2448 fps | 95.6% |
| Hodgdon BL-C2 | <<locked>> | 92% | 39,276 psi | 82% | 2543 fps | 95.5% |
| Hodgdon H322 | <<locked>> | 80% | 32,851 psi | 69% | 2365 fps | 96.6% |
| Hodgdon H335 | <<locked>> | 80% | 33,098 psi | 69% | 2375 fps | 95.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 24,207 psi | 51% | 1427 fps | 100% |
| IMR 3031 | 32.5 gr | 82% | 27,644 psi | 58% | 2287 fps | 95.3% |
| IMR 4198 | <<locked>> | 80% | 35,737 psi | 75% | 2362 fps | 99.9% |
| Lovex D073.4 | <<locked>> | 80% | 38,812 psi | 81% | 2480 fps | 96.4% |
| Lovex D073.5 | <<locked>> | 86% | 38,290 psi | 80% | 2467 fps | 95.5% |
| Lovex D073.6 | <<locked>> | 90% | 34,113 psi | 71% | 2434 fps | 95.2% |
| Norma 200 | <<locked>> | 80% | 38,609 psi | 81% | 2444 fps | 100% |
| Norma 202 | <<locked>> | 86% | 31,807 psi | 66% | 2349 fps | 95.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 24,105 psi | 50% | 1460 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 84% | 37,072 psi | 77% | 2434 fps | 95.6% |
| Rottweil R 901 | <<locked>> | 84% | 33,576 psi | 70% | 2349 fps | 95.4% |
| Shooters World AR Plus | <<locked>> | 80% | 38,812 psi | 81% | 2480 fps | 96.4% |
| Shooters World Match Rifle | <<locked>> | 90% | 34,113 psi | 71% | 2434 fps | 95.2% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 36,303 psi | 76% | 2438 fps | 96.5% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 34,548 psi | 72% | 2372 fps | 98% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 32,576 psi | 68% | 2277 fps | 95.2% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 29,573 psi | 62% | 2228 fps | 95.3% |
| Somchem S321 | <<locked>> | 88% | 39,552 psi | 83% | 2510 fps | 95.1% |
| Somchem S335 | <<locked>> | 82% | 29,776 psi | 62% | 2234 fps | 95.3% |
| Vihtavuori N120 | <<locked>> | 80% | 40,828 psi | 85% | 2418 fps | 100% |
| Vihtavuori N130 | <<locked>> | 80% | 32,692 psi | 68% | 2290 fps | 98.8% |
| Vihtavuori N133 | <<locked>> | 80% | 28,427 psi | 59% | 2198 fps | 96.6% |
| Vihtavuori N135 | <<locked>> | 82% | 25,222 psi | 53% | 2192 fps | 95.6% |
| Vihtavuori N140 | <<locked>> | 88% | 32,140 psi | 67% | 2336 fps | 95.6% |
| Vihtavuori N540 | <<locked>> | 90% | 32,808 psi | 69% | 2365 fps | 95.2% |
| Winchester 748 | <<locked>> | 90% | 37,898 psi | 79% | 2507 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 42 powders for .308 Marlin Express loaded with the .311 | 150gr | Norma Semi Soft Point. IMR 3031 delivers the highest muzzle velocity at 2,638 fps; across all powders the maximum-charge window runs from 1,594 fps to 2,638 fps. Accurate 2495 gives the best case fill at 100 %, and 42 of the 42 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (330 MPa), the top charges use 68–90 %, leaving at least 10 % headroom. The 150.0 gr projectile in 0.311" calls for a 1:17.0 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. Alliant AR-Comp, IMR 3031, Accurate 2520 rank at the top here: for .308 Marlin Express with the .311 | 150gr | Norma Semi Soft Point 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.