Load Specifications
Load data in caliber .308 Marlin Express with .308 | 155gr | Norma GTX bullet and 43 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are IMR 3031, Alliant AR-Comp and Lovex D073.6.
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% | 41,655 psi | 87% | 2444 fps | 99.7% |
| Accurate 2460 | <<locked>> | 90% | 42,569 psi | 89% | 2484 fps | 97.9% |
| Accurate 2495ᴾ | <<locked>> | 100% | 41,249 psi | 86% | 2510 fps | 99.8% |
| Accurate 2520 | <<locked>> | 94% | 42,496 psi | 89% | 2520 fps | 97.5% |
| Accurate 4064ᴾ | <<locked>> | 100% | 38,377 psi | 80% | 2477 fps | 97.8% |
| Accurate LT-30 | <<locked>> | 84% | 42,453 psi | 89% | 2375 fps | 98.9% |
| Accurate LT-32 | <<locked>> | 84% | 42,844 psi | 90% | 2382 fps | 97.4% |
| ADI AR 2207 | <<locked>> | 82% | 41,959 psi | 88% | 2415 fps | 100% |
| ADI AR 2219 | <<locked>> | 86% | 42,308 psi | 88% | 2497 fps | 98.9% |
| Alliant AR-Comp | <<locked>> | 94% | 41,060 psi | 86% | 2516 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 88% | 42,453 psi | 89% | 2470 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 86% | 43,163 psi | 90% | 2408 fps | 99.2% |
| Hodgdon Benchmark | <<locked>> | 90% | 41,655 psi | 87% | 2415 fps | 95.9% |
| Hodgdon BL-C2 | <<locked>> | 94% | 40,495 psi | 85% | 2503 fps | 95.8% |
| Hodgdon H322 | <<locked>> | 88% | 41,292 psi | 86% | 2477 fps | 98.7% |
| Hodgdon H335 | <<locked>> | 88% | 41,945 psi | 88% | 2493 fps | 98% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 32,605 psi | 68% | 1545 fps | 100% |
| IMR 3031 | <<locked>> | 96% | 41,510 psi | 87% | 2543 fps | 99.4% |
| IMR 4198 | <<locked>> | 86% | 41,655 psi | 87% | 2408 fps | 100% |
| Lovex D073.4 | <<locked>> | 84% | 43,120 psi | 90% | 2493 fps | 97.4% |
| Lovex D073.5 | <<locked>> | 90% | 42,496 psi | 89% | 2480 fps | 96.6% |
| Lovex D073.6 | <<locked>> | 96% | 40,567 psi | 85% | 2500 fps | 97.1% |
| Lovex S062ᴾ | <<locked>> | 100% | 42,366 psi | 89% | 2493 fps | 95.6% |
| Norma 200 | <<locked>> | 84% | 42,598 psi | 89% | 2451 fps | 100% |
| Norma 202 | <<locked>> | 96% | 42,134 psi | 88% | 2500 fps | 98.1% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 32,343 psi | 68% | 1578 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 88% | 41,031 psi | 86% | 2451 fps | 96.7% |
| Rottweil R 901 | <<locked>> | 92% | 41,365 psi | 86% | 2448 fps | 97.6% |
| Shooters World AR Plus | <<locked>> | 84% | 43,120 psi | 90% | 2493 fps | 97.4% |
| Shooters World Match Rifle | <<locked>> | 96% | 40,567 psi | 85% | 2500 fps | 97.1% |
| Shooters World Precisionᴾ | <<locked>> | 100% | 42,366 psi | 89% | 2493 fps | 95.6% |
| SNPE Vectan SP 10 | <<locked>> | 86% | 42,801 psi | 89% | 2500 fps | 98.1% |
| SNPE Vectan SP 3 | <<locked>> | 86% | 40,553 psi | 85% | 2428 fps | 99.2% |
| SNPE Vectan Tubal 3000 | <<locked>> | 94% | 43,134 psi | 90% | 2421 fps | 98.1% |
| SNPE Vectan Tubal 5000ᴾ | <<locked>> | 100% | 41,495 psi | 87% | 2411 fps | 98.6% |
| Somchem S335 | <<locked>> | 94% | 41,727 psi | 87% | 2425 fps | 98.6% |
| Vihtavuori N120 | <<locked>> | 82% | 42,119 psi | 88% | 2375 fps | 100% |
| Vihtavuori N130 | <<locked>> | 90% | 43,149 psi | 90% | 2425 fps | 100% |
| Vihtavuori N133 | <<locked>> | 94% | 42,467 psi | 89% | 2428 fps | 99.7% |
| Vihtavuori N135ᴾ | <<locked>> | 100% | 42,757 psi | 89% | 2520 fps | 99.9% |
| Vihtavuori N140 | <<locked>> | 98% | 42,554 psi | 89% | 2484 fps | 98.4% |
| Vihtavuori N540 | <<locked>> | 98% | 40,930 psi | 86% | 2470 fps | 97.6% |
| Winchester 748 | <<locked>> | 94% | 42,119 psi | 88% | 2526 fps | 96.4% |
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 2015 | <<locked>> | 80% | 28,776 psi | 60% | 2182 fps | 97% |
| Accurate 2460 | <<locked>> | 82% | 32,677 psi | 68% | 2290 fps | 95.1% |
| Accurate 2495 | <<locked>> | 84% | 24,381 psi | 51% | 2146 fps | 95.7% |
| Accurate 2520 | <<locked>> | 88% | 34,708 psi | 73% | 2372 fps | 95.4% |
| Accurate 4064 | <<locked>> | 92% | 29,776 psi | 62% | 2293 fps | 95.1% |
| Accurate LT-30 | <<locked>> | 80% | 37,579 psi | 79% | 2283 fps | 98% |
| Accurate LT-32 | <<locked>> | 80% | 37,927 psi | 79% | 2290 fps | 96.2% |
| ADI AR 2207 | <<locked>> | 80% | 39,523 psi | 83% | 2375 fps | 100% |
| ADI AR 2219 | <<locked>> | 80% | 34,693 psi | 72% | 2346 fps | 97.2% |
| Alliant AR-Comp | 30 gr | 80% | 26,368 psi | 55% | 2192 fps | 98.5% |
| Alliant Reloder-10x | <<locked>> | 80% | 33,272 psi | 70% | 2293 fps | 99.1% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 35,650 psi | 74% | 2274 fps | 97.9% |
| Hodgdon Benchmark | <<locked>> | 88% | 39,102 psi | 82% | 2365 fps | 95.2% |
| Hodgdon BL-C2 | <<locked>> | 92% | 37,971 psi | 79% | 2451 fps | 95% |
| Hodgdon H322 | <<locked>> | 80% | 31,937 psi | 67% | 2283 fps | 96.2% |
| Hodgdon H335 | <<locked>> | 80% | 31,952 psi | 67% | 2287 fps | 95% |
| Hodgdon TrailBoss | <<locked>> | 80% | 24,105 psi | 50% | 1381 fps | 100% |
| IMR 3031 | 31.5 gr | 84% | 28,616 psi | 60% | 2257 fps | 95.8% |
| IMR 4198 | <<locked>> | 80% | 34,940 psi | 73% | 2283 fps | 99.8% |
| Lovex D073.4 | <<locked>> | 80% | 37,391 psi | 78% | 2388 fps | 95.9% |
| Lovex D073.5 | <<locked>> | 86% | 37,260 psi | 78% | 2385 fps | 95.2% |
| Lovex D073.6 | 36.8 gr | 92% | 35,375 psi | 74% | 2402 fps | 95.6% |
| Lovex S062 | <<locked>> | 98% | 40,030 psi | 84% | 2451 fps | 95% |
| Norma 200 | <<locked>> | 80% | 37,376 psi | 78% | 2359 fps | 99.9% |
| Norma 202 | <<locked>> | 88% | 32,924 psi | 69% | 2316 fps | 95.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 24,018 psi | 50% | 1414 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 84% | 36,042 psi | 75% | 2352 fps | 95.2% |
| Rottweil R 901 | <<locked>> | 84% | 32,561 psi | 68% | 2264 fps | 95% |
| Shooters World AR Plus | <<locked>> | 80% | 37,391 psi | 78% | 2388 fps | 95.9% |
| Shooters World Match Rifle | <<locked>> | 92% | 35,375 psi | 74% | 2402 fps | 95.6% |
| Shooters World Precision | <<locked>> | 98% | 40,030 psi | 84% | 2451 fps | 95% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 34,998 psi | 73% | 2349 fps | 96% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 33,591 psi | 70% | 2290 fps | 97.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 33,576 psi | 70% | 2241 fps | 95.5% |
| SNPE Vectan Tubal 5000 | <<locked>> | 90% | 30,618 psi | 64% | 2195 fps | 95.7% |
| Somchem S335 | <<locked>> | 84% | 30,835 psi | 64% | 2205 fps | 95.7% |
| Vihtavuori N120 | <<locked>> | 80% | 39,682 psi | 83% | 2336 fps | 100% |
| Vihtavuori N130 | <<locked>> | 80% | 31,807 psi | 66% | 2211 fps | 98.6% |
| Vihtavuori N133 | <<locked>> | 80% | 27,659 psi | 58% | 2123 fps | 96.3% |
| Vihtavuori N135 | <<locked>> | 82% | 24,555 psi | 51% | 2116 fps | 95.2% |
| Vihtavuori N140 | <<locked>> | 88% | 31,096 psi | 65% | 2251 fps | 95.1% |
| Vihtavuori N540 | <<locked>> | 92% | 33,779 psi | 71% | 2329 fps | 95.5% |
| Winchester 748 | <<locked>> | 92% | 39,218 psi | 82% | 2470 fps | 95.6% |
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 43 powders for .308 Marlin Express loaded with the .308 | 155gr | Norma GTX. IMR 3031 delivers the highest muzzle velocity at 2,543 fps; across all powders the maximum-charge window runs from 1,545 fps to 2,543 fps. Accurate 2495 gives the best case fill at 100 %, and 43 of the 43 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 155.0 gr projectile in 0.308" calls for a 1:13.5 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. IMR 3031, Alliant AR-Comp, Lovex D073.6 rank at the top here: for .308 Marlin Express with the .308 | 155gr | Norma GTX 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.