Load Specifications
Load data in caliber .308 Marlin Express with .310 | 125gr | Speer HP TNT bullet and 29 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant AR-Comp, ADI AR 2219 and IMR 3031.
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 1680 | <<locked>> | 82% | 42,786 psi | 89% | 2680 fps | 99.3% |
| Accurate 2015 | <<locked>> | 96% | 42,105 psi | 88% | 2753 fps | 98.7% |
| Accurate 2495ᴾ | <<locked>> | 100% | 35,766 psi | 75% | 2707 fps | 97.7% |
| Accurate LT-30 | <<locked>> | 86% | 41,089 psi | 86% | 2638 fps | 97.1% |
| ADI AR 2207 | <<locked>> | 86% | 42,786 psi | 89% | 2749 fps | 100% |
| ADI AR 2219 | <<locked>> | 88% | 40,814 psi | 85% | 2762 fps | 96.8% |
| Alliant AR-Comp | <<locked>> | 98% | 41,597 psi | 87% | 2835 fps | 99.9% |
| Alliant Reloder-10x | <<locked>> | 92% | 43,033 psi | 90% | 2792 fps | 99.5% |
| Alliant Reloder-7 | <<locked>> | 84% | 42,032 psi | 88% | 2707 fps | 99.6% |
| Baschieri & Pellagri 106 | <<locked>> | 88% | 41,829 psi | 87% | 2674 fps | 97.6% |
| Hodgdon H322 | <<locked>> | 92% | 42,105 psi | 88% | 2789 fps | 97.1% |
| Hodgdon H335 | <<locked>> | 92% | 42,902 psi | 90% | 2805 fps | 96.3% |
| Hodgdon H4198 | <<locked>> | 84% | 42,685 psi | 89% | 2684 fps | 96.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 31,647 psi | 66% | 1749 fps | 100% |
| IMR 3031ᴾ | <<locked>> | 100% | 41,843 psi | 87% | 2851 fps | 98% |
| IMR 4198 | <<locked>> | 90% | 42,743 psi | 89% | 2736 fps | 99.8% |
| Norma 200 | <<locked>> | 88% | 43,134 psi | 90% | 2776 fps | 99.8% |
| Norma 202ᴾ | <<locked>> | 100% | 42,525 psi | 89% | 2802 fps | 96.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 31,531 psi | 66% | 1791 fps | 100% |
| Rottweil R 901 | <<locked>> | 96% | 41,669 psi | 87% | 2746 fps | 95.7% |
| SNPE Vectan BA6 1/2 | <<locked>> | 82% | 41,220 psi | 86% | 2474 fps | 100% |
| SNPE Vectan SP 3 | <<locked>> | 90% | 41,379 psi | 86% | 2746 fps | 97.9% |
| SNPE Vectan Tubal 5000ᴾ | <<locked>> | 100% | 37,594 psi | 79% | 2615 fps | 95.8% |
| Somchem S335 | <<locked>> | 98% | 42,293 psi | 88% | 2723 fps | 97% |
| Vihtavuori N120 | <<locked>> | 86% | 42,975 psi | 90% | 2707 fps | 100% |
| Vihtavuori N130 | <<locked>> | 92% | 41,481 psi | 87% | 2697 fps | 99.1% |
| Vihtavuori N133 | <<locked>> | 98% | 43,178 psi | 90% | 2736 fps | 98.7% |
| Vihtavuori N135ᴾ | <<locked>> | 100% | 37,913 psi | 79% | 2726 fps | 98% |
| Vihtavuori N140ᴾ | <<locked>> | 100% | 40,727 psi | 85% | 2736 fps | 96% |
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 1680 | <<locked>> | 80% | 39,972 psi | 84% | 2625 fps | 98.9% |
| Accurate 2015 | <<locked>> | 86% | 30,806 psi | 64% | 2507 fps | 95.6% |
| Accurate 2495 | <<locked>> | 94% | 29,327 psi | 61% | 2552 fps | 95.6% |
| Accurate LT-30 | <<locked>> | 80% | 34,243 psi | 72% | 2487 fps | 95% |
| ADI AR 2207 | <<locked>> | 80% | 35,636 psi | 74% | 2608 fps | 100% |
| ADI AR 2219 | 36.3 gr | 84% | 35,853 psi | 75% | 2654 fps | 95.2% |
| Alliant AR-Comp | 33.2 gr | 82% | 25,237 psi | 53% | 2408 fps | 95.5% |
| Alliant Reloder-10x | <<locked>> | 80% | 29,718 psi | 62% | 2490 fps | 96.5% |
| Alliant Reloder-7 | <<locked>> | 80% | 37,188 psi | 78% | 2605 fps | 98.9% |
| Baschieri & Pellagri 106 | <<locked>> | 82% | 34,505 psi | 72% | 2520 fps | 95.5% |
| Hodgdon H322 | <<locked>> | 88% | 37,217 psi | 78% | 2684 fps | 95.7% |
| Hodgdon H335 | <<locked>> | 90% | 40,103 psi | 84% | 2749 fps | 95.4% |
| Hodgdon H4198 | <<locked>> | 80% | 37,797 psi | 79% | 2582 fps | 95.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 23,322 psi | 49% | 1565 fps | 100% |
| IMR 3031 | 37.2 gr | 92% | 32,793 psi | 69% | 2635 fps | 95% |
| IMR 4198 | <<locked>> | 80% | 31,865 psi | 67% | 2497 fps | 98% |
| Norma 200 | <<locked>> | 80% | 33,431 psi | 70% | 2572 fps | 98.3% |
| Norma 202 | <<locked>> | 98% | 40,016 psi | 84% | 2753 fps | 95.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 23,090 psi | 48% | 1598 fps | 100% |
| Rottweil R 901 | <<locked>> | 94% | 39,523 psi | 83% | 2700 fps | 95.1% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 39,291 psi | 82% | 2441 fps | 100% |
| SNPE Vectan SP 3 | <<locked>> | 82% | 32,213 psi | 67% | 2536 fps | 95% |
| SNPE Vectan Tubal 5000 | <<locked>> | 98% | 35,317 psi | 74% | 2566 fps | 95% |
| Somchem S335 | <<locked>> | 94% | 37,536 psi | 78% | 2628 fps | 95.7% |
| Vihtavuori N120 | <<locked>> | 80% | 35,795 psi | 75% | 2575 fps | 100% |
| Vihtavuori N130 | <<locked>> | 80% | 28,631 psi | 60% | 2402 fps | 95.6% |
| Vihtavuori N133 | <<locked>> | 88% | 31,836 psi | 67% | 2493 fps | 95.7% |
| Vihtavuori N135 | <<locked>> | 92% | 29,631 psi | 62% | 2523 fps | 95.2% |
| Vihtavuori N140 | <<locked>> | 98% | 38,072 psi | 80% | 2680 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 29 powders for .308 Marlin Express loaded with the .310 | 125gr | Speer HP TNT. IMR 3031 delivers the highest muzzle velocity at 2,851 fps; across all powders the maximum-charge window runs from 1,749 fps to 2,851 fps. Accurate 2495 gives the best case fill at 100 %, and 29 of the 29 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. Accurate 2495, Hodgdon TrailBoss, IMR 3031 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, ADI AR 2219, IMR 3031 rank at the top here: for .308 Marlin Express with the .310 | 125gr | Speer HP TNT 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.