Load Specifications
Load data in caliber .308 Marlin Express with .308 | 143gr | TWENTY-NINE SILENTIO bullet and 34 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Hodgdon H322, 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 1680 | <<locked>> | 82% | 42,482 psi | 89% | 2454 fps | 99.6% |
| Accurate 2015 | <<locked>> | 96% | 42,061 psi | 88% | 2533 fps | 99.1% |
| Accurate 2460 | <<locked>> | 94% | 43,120 psi | 90% | 2569 fps | 96.8% |
| Accurate 2495ᴾ | <<locked>> | 100% | 35,549 psi | 74% | 2490 fps | 98.3% |
| Accurate 2520 | <<locked>> | 98% | 42,656 psi | 89% | 2598 fps | 96.2% |
| Accurate LT-30 | <<locked>> | 86% | 41,133 psi | 86% | 2421 fps | 97.7% |
| Accurate LT-32 | <<locked>> | 86% | 41,539 psi | 87% | 2425 fps | 95.7% |
| ADI AR 2207 | <<locked>> | 86% | 42,859 psi | 90% | 2520 fps | 100% |
| ADI AR 2219 | <<locked>> | 88% | 40,683 psi | 85% | 2539 fps | 97.4% |
| Alliant AR-Comp | <<locked>> | 98% | 41,321 psi | 86% | 2602 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 92% | 42,975 psi | 90% | 2562 fps | 99.7% |
| Alliant Reloder-7 | <<locked>> | 84% | 41,800 psi | 87% | 2477 fps | 99.8% |
| Baschieri & Pellagri 106 | <<locked>> | 88% | 41,568 psi | 87% | 2454 fps | 98% |
| Hodgdon H322 | <<locked>> | 92% | 42,061 psi | 88% | 2566 fps | 97.8% |
| Hodgdon H335 | <<locked>> | 92% | 42,815 psi | 89% | 2582 fps | 96.9% |
| Hodgdon H4198 | <<locked>> | 84% | 42,830 psi | 89% | 2464 fps | 97.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 31,807 psi | 66% | 1581 fps | 100% |
| IMR 3031ᴾ | <<locked>> | 100% | 41,495 psi | 87% | 2618 fps | 98.5% |
| IMR 4198 | <<locked>> | 90% | 42,467 psi | 89% | 2503 fps | 99.9% |
| Norma 200 | <<locked>> | 88% | 42,975 psi | 90% | 2546 fps | 99.9% |
| Norma 202ᴾ | <<locked>> | 100% | 42,438 psi | 89% | 2582 fps | 96.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 31,459 psi | 66% | 1617 fps | 100% |
| Rottweil R 901 | <<locked>> | 96% | 41,452 psi | 87% | 2523 fps | 96.4% |
| SNPE Vectan BA6 1/2 | <<locked>> | 82% | 41,365 psi | 86% | 2257 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 88% | 41,031 psi | 86% | 2543 fps | 96.4% |
| SNPE Vectan SP 3 | <<locked>> | 90% | 41,060 psi | 86% | 2516 fps | 98.3% |
| SNPE Vectan Tubal 3000 | <<locked>> | 96% | 41,263 psi | 86% | 2461 fps | 96.3% |
| SNPE Vectan Tubal 5000ᴾ | <<locked>> | 100% | 37,304 psi | 78% | 2402 fps | 96.4% |
| Somchem S335 | <<locked>> | 98% | 42,148 psi | 88% | 2503 fps | 97.6% |
| Vihtavuori N120 | <<locked>> | 86% | 43,004 psi | 90% | 2480 fps | 100% |
| Vihtavuori N130 | <<locked>> | 92% | 41,452 psi | 87% | 2477 fps | 99.4% |
| Vihtavuori N133 | <<locked>> | 98% | 42,931 psi | 90% | 2513 fps | 99.1% |
| Vihtavuori N135ᴾ | <<locked>> | 100% | 37,623 psi | 79% | 2507 fps | 98.5% |
| Vihtavuori N140ᴾ | <<locked>> | 100% | 40,408 psi | 84% | 2513 fps | 96.7% |
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% | 39,726 psi | 83% | 2408 fps | 99.3% |
| Accurate 2015 | <<locked>> | 84% | 28,950 psi | 60% | 2260 fps | 95.7% |
| Accurate 2460 | <<locked>> | 90% | 37,536 psi | 78% | 2464 fps | 95.2% |
| Accurate 2495 | <<locked>> | 92% | 27,195 psi | 57% | 2300 fps | 95.6% |
| Accurate 2520 | <<locked>> | 96% | 40,001 psi | 84% | 2552 fps | 95.5% |
| Accurate LT-30 | <<locked>> | 80% | 34,185 psi | 71% | 2283 fps | 95.8% |
| Accurate LT-32 | <<locked>> | 84% | 39,218 psi | 82% | 2379 fps | 95% |
| ADI AR 2207 | <<locked>> | 80% | 35,520 psi | 74% | 2392 fps | 100% |
| ADI AR 2219 | 31.6 gr | 82% | 33,446 psi | 70% | 2385 fps | 95.2% |
| Alliant AR-Comp | 28.9 gr | 80% | 23,757 psi | 50% | 2169 fps | 95.6% |
| Alliant Reloder-10x | <<locked>> | 80% | 29,733 psi | 62% | 2290 fps | 97.3% |
| Alliant Reloder-7 | <<locked>> | 80% | 37,086 psi | 77% | 2388 fps | 99.3% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 32,213 psi | 67% | 2267 fps | 95.4% |
| Hodgdon H322 | 32 gr | 86% | 34,592 psi | 72% | 2415 fps | 95.6% |
| Hodgdon H335 | <<locked>> | 88% | 37,478 psi | 78% | 2480 fps | 95.4% |
| Hodgdon H4198 | <<locked>> | 80% | 37,681 psi | 79% | 2365 fps | 96.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 23,467 psi | 49% | 1414 fps | 100% |
| IMR 3031 | <<locked>> | 92% | 32,692 psi | 68% | 2428 fps | 95.9% |
| IMR 4198 | <<locked>> | 80% | 31,981 psi | 67% | 2293 fps | 98.6% |
| Norma 200 | <<locked>> | 80% | 33,475 psi | 70% | 2362 fps | 98.9% |
| Norma 202 | <<locked>> | 96% | 37,333 psi | 78% | 2484 fps | 95.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 23,018 psi | 48% | 1440 fps | 100% |
| Rottweil R 901 | <<locked>> | 92% | 36,956 psi | 77% | 2434 fps | 95.1% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 39,262 psi | 82% | 2224 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 86% | 38,406 psi | 80% | 2493 fps | 95.7% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 30,284 psi | 63% | 2283 fps | 95.1% |
| SNPE Vectan Tubal 3000 | <<locked>> | 92% | 36,535 psi | 76% | 2369 fps | 95% |
| SNPE Vectan Tubal 5000 | <<locked>> | 96% | 33,112 psi | 69% | 2313 fps | 95% |
| Somchem S335 | <<locked>> | 92% | 35,157 psi | 73% | 2369 fps | 95.7% |
| Vihtavuori N120 | <<locked>> | 80% | 35,737 psi | 75% | 2356 fps | 100% |
| Vihtavuori N130 | <<locked>> | 80% | 28,660 psi | 60% | 2208 fps | 96.5% |
| Vihtavuori N133 | <<locked>> | 86% | 29,849 psi | 62% | 2244 fps | 95.7% |
| Vihtavuori N135 | <<locked>> | 90% | 27,601 psi | 58% | 2270 fps | 95.1% |
| Vihtavuori N140 | <<locked>> | 96% | 35,665 psi | 75% | 2421 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 34 powders for .308 Marlin Express loaded with the .308 | 143gr | TWENTY-NINE SILENTIO. IMR 3031 delivers the highest muzzle velocity at 2,618 fps; across all powders the maximum-charge window runs from 1,581 fps to 2,618 fps. Accurate 2495 gives the best case fill at 100 %, and 34 of the 34 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 143.0 gr projectile in 0.308" calls for a 1:12.0 twist; slower twists will usually not stabilise this weight. 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. Hodgdon H322, Alliant AR-Comp, ADI AR 2219 rank at the top here: for .308 Marlin Express with the .308 | 143gr | TWENTY-NINE SILENTIO 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.