Load Specifications
Load data in caliber .308 Marlin Express with .308 | 150gr | Speer BT FMJ bullet and 42 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are IMR 3031, Accurate 2520 and Alliant AR-Comp.
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% | 43,047 psi | 90% | 2507 fps | 99.6% |
| Accurate 2460 | <<locked>> | 90% | 41,481 psi | 87% | 2503 fps | 97.3% |
| Accurate 2495ᴾ | <<locked>> | 100% | 39,914 psi | 83% | 2530 fps | 99.6% |
| Accurate 2520 | <<locked>> | 94% | 41,365 psi | 86% | 2543 fps | 96.9% |
| Accurate 4064ᴾ | <<locked>> | 100% | 37,188 psi | 78% | 2497 fps | 97.2% |
| Accurate LT-30 | <<locked>> | 84% | 41,394 psi | 86% | 2395 fps | 98.5% |
| Accurate LT-32 | <<locked>> | 84% | 41,771 psi | 87% | 2398 fps | 96.8% |
| ADI AR 2207 | <<locked>> | 82% | 41,133 psi | 86% | 2444 fps | 100% |
| ADI AR 2219 | <<locked>> | 86% | 41,379 psi | 86% | 2520 fps | 98.4% |
| Alliant AR-Comp | <<locked>> | 96% | 42,105 psi | 88% | 2575 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 88% | 41,176 psi | 86% | 2490 fps | 99.9% |
| Alliant Reloder-7 | <<locked>> | 82% | 42,409 psi | 89% | 2448 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 86% | 42,003 psi | 88% | 2428 fps | 98.8% |
| Hodgdon Benchmark | <<locked>> | 92% | 43,105 psi | 90% | 2477 fps | 95.9% |
| Hodgdon BL-C2 | <<locked>> | 96% | 42,105 psi | 88% | 2569 fps | 95.8% |
| Hodgdon H322 | <<locked>> | 90% | 42,786 psi | 89% | 2543 fps | 98.7% |
| Hodgdon H335 | <<locked>> | 88% | 40,698 psi | 85% | 2510 fps | 97.4% |
| Hodgdon H4198 | <<locked>> | 82% | 43,178 psi | 90% | 2438 fps | 98.4% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 32,343 psi | 68% | 1568 fps | 100% |
| IMR 3031 | <<locked>> | 98% | 42,931 psi | 90% | 2608 fps | 99.3% |
| IMR 4198 | <<locked>> | 88% | 43,004 psi | 90% | 2474 fps | 100% |
| Lovex D073.4 | <<locked>> | 84% | 41,771 psi | 87% | 2510 fps | 96.7% |
| Lovex D073.5 | <<locked>> | 90% | 41,437 psi | 87% | 2500 fps | 95.9% |
| Lovex D073.6 | <<locked>> | 98% | 41,771 psi | 87% | 2562 fps | 97% |
| Norma 200 | <<locked>> | 84% | 41,350 psi | 86% | 2474 fps | 100% |
| Norma 202 | <<locked>> | 96% | 41,089 psi | 86% | 2520 fps | 97.5% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 32,068 psi | 67% | 1604 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 90% | 42,467 psi | 89% | 2516 fps | 96.7% |
| Rottweil R 901 | <<locked>> | 94% | 42,743 psi | 89% | 2510 fps | 97.6% |
| Shooters World AR Plus | <<locked>> | 84% | 41,771 psi | 87% | 2510 fps | 96.7% |
| Shooters World Match Rifle | <<locked>> | 98% | 41,771 psi | 87% | 2562 fps | 97% |
| SNPE Vectan SP 10 | <<locked>> | 86% | 41,858 psi | 87% | 2523 fps | 97.5% |
| SNPE Vectan SP 3 | <<locked>> | 88% | 42,047 psi | 88% | 2497 fps | 99.1% |
| SNPE Vectan Tubal 3000 | <<locked>> | 94% | 41,901 psi | 88% | 2438 fps | 97.5% |
| SNPE Vectan Tubal 5000ᴾ | <<locked>> | 100% | 40,248 psi | 84% | 2428 fps | 98.1% |
| Somchem S335 | <<locked>> | 96% | 43,120 psi | 90% | 2487 fps | 98.5% |
| Vihtavuori N120 | <<locked>> | 82% | 41,307 psi | 86% | 2405 fps | 100% |
| Vihtavuori N130 | <<locked>> | 90% | 41,901 psi | 88% | 2444 fps | 99.8% |
| Vihtavuori N133 | <<locked>> | 94% | 41,220 psi | 86% | 2448 fps | 99.4% |
| Vihtavuori N135ᴾ | <<locked>> | 100% | 41,278 psi | 86% | 2536 fps | 99.6% |
| Vihtavuori N140 | <<locked>> | 98% | 41,278 psi | 86% | 2497 fps | 97.8% |
| Vihtavuori N540ᴾ | <<locked>> | 100% | 42,540 psi | 89% | 2536 fps | 97.6% |
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% | 27,862 psi | 58% | 2195 fps | 96.2% |
| Accurate 2460 | <<locked>> | 84% | 33,736 psi | 70% | 2349 fps | 95.1% |
| Accurate 2495 | <<locked>> | 86% | 25,106 psi | 52% | 2201 fps | 95.6% |
| Accurate 2520 | 36.8 gr | 90% | 35,781 psi | 75% | 2434 fps | 95.3% |
| Accurate 4064 | <<locked>> | 94% | 30,603 psi | 64% | 2352 fps | 95% |
| Accurate LT-30 | <<locked>> | 80% | 36,651 psi | 77% | 2303 fps | 97.5% |
| Accurate LT-32 | <<locked>> | 80% | 37,014 psi | 77% | 2306 fps | 95.5% |
| ADI AR 2207 | <<locked>> | 80% | 38,392 psi | 80% | 2398 fps | 100% |
| ADI AR 2219 | <<locked>> | 80% | 33,968 psi | 71% | 2365 fps | 96.5% |
| Alliant AR-Comp | 30 gr | 80% | 25,556 psi | 53% | 2201 fps | 97.8% |
| Alliant Reloder-10x | <<locked>> | 80% | 32,256 psi | 67% | 2310 fps | 98.7% |
| Alliant Reloder-7 | <<locked>> | 80% | 39,726 psi | 83% | 2402 fps | 99.9% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 34,708 psi | 73% | 2290 fps | 97.3% |
| Hodgdon Benchmark | <<locked>> | 90% | 40,538 psi | 85% | 2431 fps | 95.2% |
| Hodgdon BL-C2 | <<locked>> | 94% | 39,465 psi | 82% | 2520 fps | 95% |
| Hodgdon H322 | <<locked>> | 80% | 30,995 psi | 65% | 2297 fps | 95.4% |
| Hodgdon H335 | <<locked>> | 82% | 33,286 psi | 70% | 2356 fps | 95% |
| Hodgdon H4198 | <<locked>> | 80% | 40,422 psi | 84% | 2388 fps | 97.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 23,902 psi | 50% | 1401 fps | 100% |
| IMR 3031 | 32.3 gr | 86% | 29,602 psi | 62% | 2320 fps | 95.8% |
| IMR 4198 | <<locked>> | 80% | 34,011 psi | 71% | 2303 fps | 99.5% |
| Lovex D073.4 | <<locked>> | 80% | 36,448 psi | 76% | 2408 fps | 95.2% |
| Lovex D073.5 | <<locked>> | 88% | 38,464 psi | 80% | 2444 fps | 95.1% |
| Lovex D073.6 | <<locked>> | 94% | 36,463 psi | 76% | 2461 fps | 95.5% |
| Norma 200 | <<locked>> | 80% | 36,535 psi | 76% | 2385 fps | 99.7% |
| Norma 202 | <<locked>> | 90% | 34,026 psi | 71% | 2379 fps | 95.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 23,801 psi | 50% | 1434 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 86% | 37,333 psi | 78% | 2418 fps | 95.2% |
| Rottweil R 901 | <<locked>> | 86% | 33,663 psi | 70% | 2326 fps | 95% |
| Shooters World AR Plus | <<locked>> | 80% | 36,448 psi | 76% | 2408 fps | 95.2% |
| Shooters World Match Rifle | <<locked>> | 94% | 36,463 psi | 76% | 2461 fps | 95.5% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 34,214 psi | 71% | 2369 fps | 95.3% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 32,924 psi | 69% | 2313 fps | 97.1% |
| SNPE Vectan Tubal 3000 | <<locked>> | 88% | 34,867 psi | 73% | 2303 fps | 95.5% |
| SNPE Vectan Tubal 5000 | <<locked>> | 92% | 31,734 psi | 66% | 2254 fps | 95.6% |
| Somchem S335 | <<locked>> | 86% | 31,894 psi | 67% | 2264 fps | 95.6% |
| Vihtavuori N120 | <<locked>> | 80% | 38,566 psi | 81% | 2362 fps | 100% |
| Vihtavuori N130 | <<locked>> | 80% | 31,169 psi | 65% | 2234 fps | 98.2% |
| Vihtavuori N133 | <<locked>> | 80% | 27,122 psi | 57% | 2142 fps | 95.6% |
| Vihtavuori N135 | <<locked>> | 84% | 25,208 psi | 53% | 2169 fps | 95.1% |
| Vihtavuori N140 | <<locked>> | 90% | 32,416 psi | 68% | 2316 fps | 95.2% |
| Vihtavuori N540 | <<locked>> | 94% | 35,157 psi | 73% | 2392 fps | 95.5% |
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 42 powders for .308 Marlin Express loaded with the .308 | 150gr | Speer BT FMJ. IMR 3031 delivers the highest muzzle velocity at 2,608 fps; across all powders the maximum-charge window runs from 1,568 fps to 2,608 fps. Accurate 2495 gives the best case fill at 100 %, and 42 of the 42 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (330 MPa), the top charges use 67–90 %, leaving at least 10 % headroom. The 150.0 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, Accurate 2520, Alliant AR-Comp rank at the top here: for .308 Marlin Express with the .308 | 150gr | Speer BT FMJ 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.