Load Specifications
Load data in caliber .308 Marlin Express with .308 | 150gr | Swift Scirocco bullet and 40 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant AR-Comp, SNPE Vectan SP 10 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 2015 | <<locked>> | 96% | 42,946 psi | 90% | 2480 fps | 99.4% |
| Accurate 2460 | <<locked>> | 92% | 41,568 psi | 87% | 2477 fps | 96.9% |
| Accurate 2495ᴾ | <<locked>> | 100% | 36,666 psi | 77% | 2451 fps | 98.9% |
| Accurate 2520 | <<locked>> | 96% | 41,191 psi | 86% | 2510 fps | 96.4% |
| Accurate 4064ᴾ | <<locked>> | 100% | 34,200 psi | 71% | 2411 fps | 95.8% |
| Accurate LT-30 | <<locked>> | 86% | 41,916 psi | 88% | 2375 fps | 98.2% |
| Accurate LT-32 | <<locked>> | 86% | 42,351 psi | 88% | 2379 fps | 96.4% |
| ADI AR 2207 | <<locked>> | 84% | 41,452 psi | 87% | 2428 fps | 100% |
| ADI AR 2219 | <<locked>> | 88% | 41,727 psi | 87% | 2497 fps | 98.1% |
| Alliant AR-Comp | <<locked>> | 98% | 42,192 psi | 88% | 2549 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 90% | 41,394 psi | 86% | 2470 fps | 99.8% |
| Alliant Reloder-7 | <<locked>> | 84% | 43,004 psi | 90% | 2431 fps | 99.9% |
| Baschieri & Pellagri 106 | <<locked>> | 88% | 42,656 psi | 89% | 2411 fps | 98.6% |
| Hodgdon H322 | <<locked>> | 92% | 43,221 psi | 90% | 2523 fps | 98.4% |
| Hodgdon H335 | <<locked>> | 90% | 40,901 psi | 85% | 2487 fps | 96.9% |
| Hodgdon H4198 | <<locked>> | 82% | 41,046 psi | 86% | 2369 fps | 97.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 31,966 psi | 67% | 1539 fps | 100% |
| IMR 3031ᴾ | <<locked>> | 100% | 42,786 psi | 89% | 2579 fps | 99% |
| IMR 4198 | <<locked>> | 88% | 41,075 psi | 86% | 2415 fps | 100% |
| Lovex D073.4 | <<locked>> | 86% | 42,337 psi | 88% | 2490 fps | 96.3% |
| Lovex D073.6ᴾ | <<locked>> | 100% | 41,727 psi | 87% | 2533 fps | 96.5% |
| Norma 200 | <<locked>> | 86% | 41,452 psi | 87% | 2451 fps | 99.9% |
| Norma 202 | <<locked>> | 98% | 40,872 psi | 85% | 2487 fps | 97% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 31,662 psi | 66% | 1575 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 92% | 43,004 psi | 90% | 2497 fps | 96.3% |
| Rottweil R 901 | <<locked>> | 96% | 42,627 psi | 89% | 2480 fps | 97.1% |
| Shooters World AR Plus | <<locked>> | 86% | 42,337 psi | 88% | 2490 fps | 96.3% |
| Shooters World Match Rifleᴾ | <<locked>> | 100% | 41,727 psi | 87% | 2533 fps | 96.5% |
| SNPE Vectan BA6 1/2 | <<locked>> | 82% | 42,090 psi | 88% | 2201 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 88% | 41,858 psi | 87% | 2497 fps | 97.1% |
| SNPE Vectan SP 3 | <<locked>> | 90% | 42,438 psi | 89% | 2474 fps | 98.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 96% | 42,351 psi | 88% | 2418 fps | 97.1% |
| SNPE Vectan Tubal 5000ᴾ | <<locked>> | 100% | 37,971 psi | 79% | 2356 fps | 97.1% |
| Somchem S335 | <<locked>> | 98% | 43,018 psi | 90% | 2454 fps | 98.2% |
| Vihtavuori N120 | <<locked>> | 84% | 41,626 psi | 87% | 2388 fps | 100% |
| Vihtavuori N130 | <<locked>> | 92% | 42,424 psi | 89% | 2428 fps | 99.7% |
| Vihtavuori N133 | <<locked>> | 96% | 41,539 psi | 87% | 2425 fps | 99.1% |
| Vihtavuori N135ᴾ | <<locked>> | 100% | 38,464 psi | 80% | 2461 fps | 99% |
| Vihtavuori N140ᴾ | <<locked>> | 100% | 41,263 psi | 86% | 2467 fps | 97.4% |
| Vihtavuori N540ᴾ | <<locked>> | 100% | 39,813 psi | 83% | 2457 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% | 26,165 psi | 55% | 2129 fps | 95% |
| Accurate 2460 | <<locked>> | 88% | 36,448 psi | 76% | 2382 fps | 95.5% |
| Accurate 2495 | <<locked>> | 90% | 26,237 psi | 55% | 2218 fps | 95.7% |
| Accurate 2520 | <<locked>> | 94% | 38,319 psi | 80% | 2457 fps | 95.6% |
| Accurate 4064 | <<locked>> | 98% | 32,082 psi | 67% | 2365 fps | 95% |
| Accurate LT-30 | <<locked>> | 80% | 35,012 psi | 73% | 2241 fps | 96.6% |
| Accurate LT-32 | <<locked>> | 82% | 37,579 psi | 79% | 2287 fps | 95.1% |
| ADI AR 2207 | <<locked>> | 80% | 36,535 psi | 76% | 2343 fps | 100% |
| ADI AR 2219 | 30.4 gr | 80% | 32,227 psi | 67% | 2300 fps | 95.3% |
| Alliant AR-Comp | 28.4 gr | 80% | 24,207 psi | 51% | 2133 fps | 96.6% |
| Alliant Reloder-10x | <<locked>> | 80% | 30,371 psi | 63% | 2244 fps | 97.9% |
| Alliant Reloder-7 | <<locked>> | 80% | 37,797 psi | 79% | 2339 fps | 99.6% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 32,924 psi | 69% | 2228 fps | 96.2% |
| Hodgdon H322 | <<locked>> | 84% | 33,344 psi | 70% | 2326 fps | 95.7% |
| Hodgdon H335 | <<locked>> | 86% | 36,056 psi | 75% | 2388 fps | 95.5% |
| Hodgdon H4198 | <<locked>> | 80% | 38,609 psi | 81% | 2323 fps | 96.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 23,467 psi | 49% | 1371 fps | 100% |
| IMR 3031 | <<locked>> | 88% | 29,501 psi | 62% | 2287 fps | 95.1% |
| IMR 4198 | <<locked>> | 80% | 32,721 psi | 68% | 2247 fps | 99.1% |
| Lovex D073.4 | <<locked>> | 84% | 39,421 psi | 82% | 2438 fps | 95.5% |
| Lovex D073.6 | <<locked>> | 98% | 38,812 psi | 81% | 2480 fps | 95.7% |
| Norma 200 | <<locked>> | 80% | 34,519 psi | 72% | 2320 fps | 99.3% |
| Norma 202 | <<locked>> | 92% | 34,113 psi | 71% | 2356 fps | 95% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 23,351 psi | 49% | 1407 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 90% | 40,118 psi | 84% | 2444 fps | 95.5% |
| Rottweil R 901 | <<locked>> | 90% | 35,737 psi | 75% | 2349 fps | 95.2% |
| Shooters World AR Plus | <<locked>> | 84% | 39,421 psi | 82% | 2438 fps | 95.5% |
| Shooters World Match Rifle | <<locked>> | 98% | 38,812 psi | 81% | 2480 fps | 95.7% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 39,914 psi | 83% | 2172 fps | 100% |
| SNPE Vectan SP 10 | 33 gr | 84% | 36,883 psi | 77% | 2402 fps | 95.7% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 31,140 psi | 65% | 2244 fps | 96% |
| SNPE Vectan Tubal 3000 | <<locked>> | 90% | 35,215 psi | 74% | 2283 fps | 95.1% |
| SNPE Vectan Tubal 5000 | <<locked>> | 94% | 32,010 psi | 67% | 2231 fps | 95.1% |
| Somchem S335 | <<locked>> | 88% | 31,865 psi | 67% | 2238 fps | 95.1% |
| Vihtavuori N120 | <<locked>> | 80% | 36,724 psi | 77% | 2310 fps | 100% |
| Vihtavuori N130 | <<locked>> | 80% | 29,443 psi | 62% | 2169 fps | 97.3% |
| Vihtavuori N133 | <<locked>> | 82% | 27,267 psi | 57% | 2123 fps | 95.1% |
| Vihtavuori N135 | <<locked>> | 88% | 26,905 psi | 56% | 2195 fps | 95.4% |
| Vihtavuori N140 | <<locked>> | 94% | 34,577 psi | 72% | 2336 fps | 95.4% |
| Vihtavuori N540 | <<locked>> | 98% | 37,492 psi | 78% | 2415 fps | 95.7% |
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 72 powders for .308 Marlin Express loaded with the .308 | 150gr | Swift Scirocco. IMR 3031 delivers the highest muzzle velocity at 2,579 fps; across all powders the maximum-charge window runs from 1,539 fps to 2,579 fps. Accurate 2495 gives the best case fill at 100 %, and 72 of the 72 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 150.0 gr projectile in 0.308" calls for a 1:12.0 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. Alliant AR-Comp, SNPE Vectan SP 10, ADI AR 2219 rank at the top here: for .308 Marlin Express with the .308 | 150gr | Swift Scirocco 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.