Load Specifications
Load data in caliber .308 Marlin Express with .308 | 155gr | Frontier RSBT bullet and 40 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ADI AR 2219, Alliant AR-Comp and Hodgdon H335.
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>> | 94% | 40,683 psi | 85% | 2392 fps | 99.3% |
| Accurate 2460 | <<locked>> | 92% | 41,698 psi | 87% | 2428 fps | 97.1% |
| Accurate 2495ᴾ | <<locked>> | 100% | 36,782 psi | 77% | 2402 fps | 99% |
| Accurate 2520 | <<locked>> | 96% | 41,147 psi | 86% | 2461 fps | 96.6% |
| Accurate 4064ᴾ | <<locked>> | 100% | 34,316 psi | 72% | 2369 fps | 96.1% |
| Accurate LT-30 | <<locked>> | 86% | 41,901 psi | 88% | 2323 fps | 98.4% |
| Accurate LT-32 | <<locked>> | 86% | 42,337 psi | 88% | 2329 fps | 96.6% |
| ADI AR 2207 | <<locked>> | 84% | 41,336 psi | 86% | 2375 fps | 100% |
| ADI AR 2219 | <<locked>> | 88% | 41,698 psi | 87% | 2444 fps | 98.3% |
| Alliant AR-Comp | <<locked>> | 98% | 42,264 psi | 88% | 2500 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 90% | 41,510 psi | 87% | 2418 fps | 99.8% |
| Alliant Reloder-7 | <<locked>> | 84% | 42,960 psi | 90% | 2382 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 88% | 42,699 psi | 89% | 2362 fps | 98.7% |
| Hodgdon H322 | <<locked>> | 92% | 43,178 psi | 90% | 2470 fps | 98.5% |
| Hodgdon H335 | <<locked>> | 90% | 40,944 psi | 86% | 2438 fps | 97.1% |
| Hodgdon H4198 | <<locked>> | 82% | 41,278 psi | 86% | 2323 fps | 97.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 32,082 psi | 67% | 1503 fps | 100% |
| IMR 3031ᴾ | <<locked>> | 100% | 42,917 psi | 90% | 2526 fps | 99.2% |
| IMR 4198 | <<locked>> | 88% | 40,959 psi | 86% | 2362 fps | 100% |
| Lovex D073.4 | <<locked>> | 86% | 42,351 psi | 88% | 2441 fps | 96.6% |
| Lovex D073.6ᴾ | <<locked>> | 100% | 41,756 psi | 87% | 2484 fps | 96.7% |
| Norma 200 | <<locked>> | 86% | 41,524 psi | 87% | 2402 fps | 100% |
| Norma 202 | <<locked>> | 98% | 41,017 psi | 86% | 2441 fps | 97.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 31,792 psi | 66% | 1539 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 92% | 43,018 psi | 90% | 2444 fps | 96.5% |
| Rottweil R 901 | <<locked>> | 96% | 42,612 psi | 89% | 2431 fps | 97.3% |
| Shooters World AR Plus | <<locked>> | 86% | 42,351 psi | 88% | 2441 fps | 96.6% |
| Shooters World Match Rifleᴾ | <<locked>> | 100% | 41,756 psi | 87% | 2484 fps | 96.7% |
| SNPE Vectan BA6 1/2 | <<locked>> | 82% | 42,351 psi | 88% | 2156 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 88% | 42,279 psi | 88% | 2454 fps | 97.4% |
| SNPE Vectan SP 3 | <<locked>> | 90% | 42,496 psi | 89% | 2425 fps | 99% |
| SNPE Vectan Tubal 3000 | <<locked>> | 96% | 42,235 psi | 88% | 2365 fps | 97.2% |
| SNPE Vectan Tubal 5000ᴾ | <<locked>> | 100% | 38,000 psi | 79% | 2310 fps | 97.3% |
| Somchem S335 | <<locked>> | 98% | 43,134 psi | 90% | 2408 fps | 98.3% |
| Vihtavuori N120 | <<locked>> | 84% | 41,510 psi | 87% | 2336 fps | 100% |
| Vihtavuori N130 | <<locked>> | 92% | 42,235 psi | 88% | 2375 fps | 99.8% |
| Vihtavuori N133 | <<locked>> | 96% | 41,452 psi | 87% | 2375 fps | 99.2% |
| Vihtavuori N135ᴾ | <<locked>> | 100% | 38,551 psi | 81% | 2411 fps | 99.2% |
| Vihtavuori N140ᴾ | <<locked>> | 100% | 41,495 psi | 87% | 2421 fps | 97.6% |
| Vihtavuori N540ᴾ | <<locked>> | 100% | 40,016 psi | 84% | 2415 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 2015 | <<locked>> | 80% | 26,295 psi | 55% | 2090 fps | 95.3% |
| Accurate 2460 | <<locked>> | 88% | 36,434 psi | 76% | 2333 fps | 95.7% |
| Accurate 2495 | <<locked>> | 88% | 24,700 psi | 52% | 2133 fps | 95.3% |
| Accurate 2520 | <<locked>> | 92% | 35,824 psi | 75% | 2362 fps | 95% |
| Accurate 4064 | <<locked>> | 98% | 32,213 psi | 67% | 2323 fps | 95.4% |
| Accurate LT-30 | <<locked>> | 80% | 35,201 psi | 74% | 2198 fps | 96.8% |
| Accurate LT-32 | <<locked>> | 82% | 37,797 psi | 79% | 2244 fps | 95.4% |
| ADI AR 2207 | <<locked>> | 80% | 36,680 psi | 77% | 2293 fps | 100% |
| ADI AR 2219 | 29.6 gr | 80% | 32,227 psi | 67% | 2254 fps | 95.6% |
| Alliant AR-Comp | 27.7 gr | 80% | 24,323 psi | 51% | 2093 fps | 96.9% |
| Alliant Reloder-10x | <<locked>> | 80% | 30,472 psi | 64% | 2201 fps | 98.1% |
| Alliant Reloder-7 | <<locked>> | 80% | 37,985 psi | 79% | 2293 fps | 99.7% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 33,025 psi | 69% | 2185 fps | 96.5% |
| Hodgdon H322 | <<locked>> | 82% | 31,386 psi | 66% | 2234 fps | 95.2% |
| Hodgdon H335 | 32.9 gr | 86% | 36,042 psi | 75% | 2343 fps | 95.7% |
| Hodgdon H4198 | <<locked>> | 80% | 38,783 psi | 81% | 2280 fps | 97.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 23,366 psi | 49% | 1335 fps | 100% |
| IMR 3031 | <<locked>> | 88% | 29,588 psi | 62% | 2244 fps | 95.4% |
| IMR 4198 | <<locked>> | 80% | 32,706 psi | 68% | 2201 fps | 99.2% |
| Lovex D073.4 | <<locked>> | 82% | 36,883 psi | 77% | 2339 fps | 95% |
| Lovex D073.6 | <<locked>> | 96% | 36,318 psi | 76% | 2385 fps | 95.1% |
| Norma 200 | <<locked>> | 80% | 34,447 psi | 72% | 2270 fps | 99.4% |
| Norma 202 | <<locked>> | 92% | 34,011 psi | 71% | 2306 fps | 95.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 23,264 psi | 49% | 1368 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 88% | 37,724 psi | 79% | 2349 fps | 95% |
| Rottweil R 901 | <<locked>> | 90% | 35,839 psi | 75% | 2303 fps | 95.5% |
| Shooters World AR Plus | <<locked>> | 82% | 36,883 psi | 77% | 2339 fps | 95% |
| Shooters World Match Rifle | <<locked>> | 96% | 36,318 psi | 76% | 2385 fps | 95.1% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 40,089 psi | 84% | 2123 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 82% | 34,621 psi | 72% | 2306 fps | 95.2% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 31,227 psi | 65% | 2201 fps | 96.3% |
| SNPE Vectan Tubal 3000 | <<locked>> | 90% | 35,317 psi | 74% | 2241 fps | 95.4% |
| SNPE Vectan Tubal 5000 | <<locked>> | 94% | 31,894 psi | 67% | 2185 fps | 95.3% |
| Somchem S335 | <<locked>> | 88% | 31,937 psi | 67% | 2195 fps | 95.4% |
| Vihtavuori N120 | <<locked>> | 80% | 36,869 psi | 77% | 2260 fps | 100% |
| Vihtavuori N130 | <<locked>> | 80% | 29,573 psi | 62% | 2129 fps | 97.5% |
| Vihtavuori N133 | <<locked>> | 82% | 27,398 psi | 57% | 2083 fps | 95.4% |
| Vihtavuori N135 | <<locked>> | 88% | 26,919 psi | 56% | 2152 fps | 95.7% |
| Vihtavuori N140 | <<locked>> | 94% | 34,548 psi | 72% | 2290 fps | 95.6% |
| Vihtavuori N540 | <<locked>> | 96% | 35,244 psi | 74% | 2323 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 74 powders for .308 Marlin Express loaded with the .308 | 155gr | Frontier RSBT. IMR 3031 delivers the highest muzzle velocity at 2,526 fps; across all powders the maximum-charge window runs from 1,503 fps to 2,526 fps. Accurate 2495 gives the best case fill at 100 %, and 74 of the 74 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 155.0 gr projectile in 0.308" calls for a 1:10.5 twist; slower twists will usually not stabilise this weight. Accurate 2495, Accurate 4064, Alliant Reloder- TS 15.5 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. ADI AR 2219, Alliant AR-Comp, Hodgdon H335 rank at the top here: for .308 Marlin Express with the .308 | 155gr | Frontier RSBT they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate 2200, Accurate 2230, ADI AR 2206H burn incompletely and react more sensitively to barrel length and temperature. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.