Load Specifications
Load data in caliber .308 Marlin Express with .310 | 123gr | Hornady SST bullet and 26 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-10x, Alliant AR-Comp and Norma 200.
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% | 41,742 psi | 87% | 2674 fps | 99% |
| Accurate 2015 | <<locked>> | 96% | 41,002 psi | 86% | 2746 fps | 98.2% |
| Accurate 2495ᴾ | <<locked>> | 100% | 34,301 psi | 72% | 2690 fps | 97.1% |
| Accurate LT-30 | <<locked>> | 88% | 42,612 psi | 89% | 2680 fps | 97.1% |
| ADI AR 2207 | <<locked>> | 86% | 41,568 psi | 87% | 2743 fps | 100% |
| ADI AR 2219 | <<locked>> | 90% | 42,366 psi | 89% | 2805 fps | 96.9% |
| Alliant AR-Compᴾ | <<locked>> | 100% | 42,859 psi | 90% | 2871 fps | 99.9% |
| Alliant Reloder-10x | <<locked>> | 92% | 41,814 psi | 87% | 2782 fps | 99.2% |
| Alliant Reloder-7 | <<locked>> | 84% | 40,857 psi | 85% | 2697 fps | 99.3% |
| Baschieri & Pellagri 106 | <<locked>> | 88% | 40,611 psi | 85% | 2661 fps | 97% |
| Hodgdon H322 | <<locked>> | 92% | 41,060 psi | 86% | 2779 fps | 96.5% |
| Hodgdon H4198 | <<locked>> | 84% | 41,959 psi | 88% | 2680 fps | 96.3% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 31,444 psi | 66% | 1752 fps | 100% |
| IMR 3031ᴾ | <<locked>> | 100% | 40,524 psi | 85% | 2831 fps | 97.3% |
| IMR 4198 | <<locked>> | 90% | 41,597 psi | 87% | 2726 fps | 99.6% |
| Norma 200 | <<locked>> | 88% | 41,930 psi | 88% | 2769 fps | 99.6% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 31,314 psi | 65% | 1795 fps | 100% |
| Rottweil R 901 | <<locked>> | 98% | 43,076 psi | 90% | 2785 fps | 95.7% |
| SNPE Vectan BA6 1/2 | <<locked>> | 84% | 42,627 psi | 89% | 2513 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 90% | 42,888 psi | 90% | 2812 fps | 95.8% |
| SNPE Vectan SP 3 | <<locked>> | 92% | 42,830 psi | 89% | 2785 fps | 97.9% |
| Somchem S335 | <<locked>> | 98% | 40,959 psi | 86% | 2710 fps | 96.4% |
| Vihtavuori N120 | <<locked>> | 86% | 41,727 psi | 87% | 2703 fps | 100% |
| Vihtavuori N130 | <<locked>> | 94% | 42,975 psi | 90% | 2740 fps | 99.1% |
| Vihtavuori N133 | <<locked>> | 98% | 41,800 psi | 87% | 2723 fps | 98.2% |
| Vihtavuori N135ᴾ | <<locked>> | 100% | 36,651 psi | 77% | 2713 fps | 97.4% |
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% | 38,972 psi | 81% | 2618 fps | 98.6% |
| Accurate 2015 | <<locked>> | 88% | 31,807 psi | 66% | 2543 fps | 95.6% |
| Accurate 2495 | <<locked>> | 96% | 29,965 psi | 63% | 2582 fps | 95.5% |
| Accurate LT-30 | <<locked>> | 82% | 35,737 psi | 75% | 2533 fps | 95.2% |
| ADI AR 2207 | <<locked>> | 80% | 34,476 psi | 72% | 2598 fps | 99.9% |
| ADI AR 2219 | <<locked>> | 86% | 37,159 psi | 78% | 2694 fps | 95.3% |
| Alliant AR-Comp | 33.5 gr | 84% | 26,034 psi | 54% | 2444 fps | 95.5% |
| Alliant Reloder-10x | 31.1 gr | 80% | 28,703 psi | 60% | 2474 fps | 95.7% |
| Alliant Reloder-7 | <<locked>> | 80% | 36,071 psi | 75% | 2595 fps | 98.5% |
| Baschieri & Pellagri 106 | <<locked>> | 84% | 35,940 psi | 75% | 2562 fps | 95.6% |
| Hodgdon H322 | <<locked>> | 90% | 38,580 psi | 81% | 2726 fps | 95.8% |
| Hodgdon H4198 | <<locked>> | 82% | 39,450 psi | 82% | 2628 fps | 95.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 23,032 psi | 48% | 1565 fps | 100% |
| IMR 3031 | <<locked>> | 94% | 33,910 psi | 71% | 2677 fps | 95% |
| IMR 4198 | <<locked>> | 80% | 31,154 psi | 65% | 2487 fps | 97.5% |
| Norma 200 | 32.3 gr | 80% | 32,619 psi | 68% | 2566 fps | 97.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 22,800 psi | 48% | 1601 fps | 100% |
| Rottweil R 901 | <<locked>> | 96% | 40,538 psi | 85% | 2736 fps | 95% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 38,421 psi | 80% | 2444 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 88% | 40,059 psi | 84% | 2756 fps | 95% |
| SNPE Vectan SP 3 | <<locked>> | 84% | 33,576 psi | 70% | 2582 fps | 95.2% |
| Somchem S335 | <<locked>> | 96% | 38,624 psi | 81% | 2661 fps | 95.7% |
| Vihtavuori N120 | <<locked>> | 80% | 34,650 psi | 72% | 2566 fps | 100% |
| Vihtavuori N130 | <<locked>> | 80% | 27,949 psi | 58% | 2395 fps | 95% |
| Vihtavuori N133 | <<locked>> | 90% | 32,924 psi | 69% | 2533 fps | 95.7% |
| Vihtavuori N135 | <<locked>> | 94% | 30,589 psi | 64% | 2562 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 26 powders for .308 Marlin Express loaded with the .310 | 123gr | Hornady SST. Alliant AR-Comp delivers the highest muzzle velocity at 2,871 fps; across all powders the maximum-charge window runs from 1,752 fps to 2,871 fps. Accurate 2495 gives the best case fill at 100 %, and 26 of the 26 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (330 MPa), the top charges use 65–90 %, leaving at least 10 % headroom. The 123.0 gr projectile in 0.31" calls for a 1:15.5 twist; slower twists will usually not stabilise this weight. Accurate 2495, Alliant AR-Comp, 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 Reloder-10x, Alliant AR-Comp, Norma 200 rank at the top here: for .308 Marlin Express with the .310 | 123gr | Hornady SST 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.