Load Specifications
Load data in caliber .308 Marlin Express with .308 | 150gr | Sierra GameKing bullet and 41 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 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>> | 92% | 41,365 psi | 86% | 2487 fps | 99.5% |
| Accurate 2460 | <<locked>> | 90% | 42,424 psi | 89% | 2530 fps | 97.7% |
| Accurate 2495ᴾ | <<locked>> | 100% | 40,973 psi | 86% | 2556 fps | 99.7% |
| Accurate 2520 | <<locked>> | 94% | 42,293 psi | 88% | 2566 fps | 97.3% |
| Accurate 4064ᴾ | <<locked>> | 100% | 38,116 psi | 80% | 2520 fps | 97.5% |
| Accurate LT-30 | <<locked>> | 84% | 42,105 psi | 88% | 2415 fps | 98.7% |
| Accurate LT-32 | <<locked>> | 84% | 42,525 psi | 89% | 2421 fps | 97.1% |
| ADI AR 2207 | <<locked>> | 82% | 41,684 psi | 87% | 2461 fps | 100% |
| ADI AR 2219 | <<locked>> | 86% | 42,032 psi | 88% | 2539 fps | 98.6% |
| Alliant AR-Comp | <<locked>> | 96% | 43,120 psi | 90% | 2598 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 88% | 42,003 psi | 88% | 2510 fps | 99.9% |
| Alliant Reloder-7 | <<locked>> | 82% | 43,236 psi | 90% | 2470 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 86% | 42,873 psi | 90% | 2451 fps | 99% |
| Hodgdon BL-C2 | <<locked>> | 96% | 42,960 psi | 90% | 2595 fps | 96.2% |
| Hodgdon H322 | <<locked>> | 88% | 40,727 psi | 85% | 2516 fps | 98.4% |
| Hodgdon H335 | <<locked>> | 88% | 41,568 psi | 87% | 2536 fps | 97.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 32,329 psi | 68% | 1575 fps | 100% |
| IMR 3031 | <<locked>> | 96% | 41,162 psi | 86% | 2585 fps | 99.2% |
| IMR 4198 | <<locked>> | 86% | 41,423 psi | 87% | 2454 fps | 100% |
| Lovex D073.4 | <<locked>> | 84% | 42,844 psi | 90% | 2536 fps | 97.1% |
| Lovex D073.5 | <<locked>> | 90% | 42,308 psi | 88% | 2526 fps | 96.3% |
| Lovex D073.6 | <<locked>> | 98% | 42,757 psi | 89% | 2585 fps | 97.4% |
| Norma 200 | <<locked>> | 84% | 42,177 psi | 88% | 2493 fps | 100% |
| Norma 202 | <<locked>> | 96% | 41,727 psi | 87% | 2539 fps | 97.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 32,387 psi | 68% | 1614 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 88% | 40,756 psi | 85% | 2493 fps | 96.4% |
| Rottweil R 901 | <<locked>> | 92% | 40,814 psi | 85% | 2484 fps | 97.3% |
| Shooters World AR Plus | <<locked>> | 84% | 42,844 psi | 90% | 2536 fps | 97.1% |
| Shooters World Match Rifle | <<locked>> | 98% | 42,757 psi | 89% | 2585 fps | 97.4% |
| SNPE Vectan SP 10 | <<locked>> | 86% | 42,438 psi | 89% | 2543 fps | 97.8% |
| SNPE Vectan SP 3 | <<locked>> | 88% | 42,873 psi | 90% | 2516 fps | 99.3% |
| SNPE Vectan Tubal 3000 | <<locked>> | 94% | 42,511 psi | 89% | 2457 fps | 97.7% |
| SNPE Vectan Tubal 5000ᴾ | <<locked>> | 100% | 41,075 psi | 86% | 2451 fps | 98.4% |
| Somchem S335 | <<locked>> | 94% | 41,408 psi | 87% | 2464 fps | 98.3% |
| Vihtavuori N120 | <<locked>> | 82% | 41,814 psi | 87% | 2421 fps | 100% |
| Vihtavuori N130 | <<locked>> | 90% | 42,612 psi | 89% | 2464 fps | 99.9% |
| Vihtavuori N133 | <<locked>> | 94% | 41,858 psi | 87% | 2467 fps | 99.5% |
| Vihtavuori N135ᴾ | <<locked>> | 100% | 42,264 psi | 88% | 2559 fps | 99.8% |
| Vihtavuori N140 | <<locked>> | 98% | 42,061 psi | 88% | 2520 fps | 98.1% |
| Vihtavuori N540 | <<locked>> | 98% | 40,683 psi | 85% | 2513 fps | 97.3% |
| Winchester 748 | <<locked>> | 94% | 41,582 psi | 87% | 2562 fps | 96% |
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% | 28,311 psi | 59% | 2211 fps | 96.5% |
| Accurate 2460 | <<locked>> | 84% | 34,679 psi | 72% | 2379 fps | 95.5% |
| Accurate 2495 | <<locked>> | 84% | 24,033 psi | 50% | 2175 fps | 95.2% |
| Accurate 2520 | <<locked>> | 90% | 36,709 psi | 77% | 2461 fps | 95.8% |
| Accurate 4064 | <<locked>> | 94% | 31,502 psi | 66% | 2379 fps | 95.5% |
| Accurate LT-30 | <<locked>> | 80% | 37,347 psi | 78% | 2326 fps | 97.8% |
| Accurate LT-32 | <<locked>> | 80% | 37,739 psi | 79% | 2329 fps | 95.9% |
| ADI AR 2207 | <<locked>> | 80% | 39,334 psi | 82% | 2421 fps | 100% |
| ADI AR 2219 | <<locked>> | 80% | 34,606 psi | 72% | 2388 fps | 96.9% |
| Alliant AR-Comp | 30.6 gr | 80% | 26,136 psi | 55% | 2228 fps | 98.2% |
| Alliant Reloder-10x | <<locked>> | 80% | 32,779 psi | 68% | 2329 fps | 98.9% |
| Alliant Reloder-7 | <<locked>> | 80% | 40,538 psi | 85% | 2425 fps | 99.9% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 35,244 psi | 74% | 2310 fps | 97.5% |
| Hodgdon BL-C2 | <<locked>> | 94% | 40,277 psi | 84% | 2546 fps | 95.4% |
| Hodgdon H322 | <<locked>> | 80% | 31,647 psi | 66% | 2320 fps | 95.8% |
| Hodgdon H335 | 34.6 gr | 82% | 33,852 psi | 71% | 2375 fps | 95.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 24,018 psi | 50% | 1411 fps | 100% |
| IMR 3031 | 32.1 gr | 84% | 28,297 psi | 59% | 2290 fps | 95.3% |
| IMR 4198 | <<locked>> | 80% | 34,824 psi | 73% | 2326 fps | 99.7% |
| Lovex D073.4 | <<locked>> | 80% | 37,217 psi | 78% | 2431 fps | 95.6% |
| Lovex D073.5 | <<locked>> | 88% | 39,363 psi | 82% | 2470 fps | 95.5% |
| Lovex D073.6 | <<locked>> | 92% | 34,911 psi | 73% | 2438 fps | 95.1% |
| Norma 200 | <<locked>> | 80% | 37,014 psi | 77% | 2402 fps | 99.8% |
| Norma 202 | <<locked>> | 88% | 32,460 psi | 68% | 2349 fps | 95.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 23,917 psi | 50% | 1444 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 86% | 38,261 psi | 80% | 2444 fps | 95.7% |
| Rottweil R 901 | <<locked>> | 86% | 34,330 psi | 72% | 2349 fps | 95.4% |
| Shooters World AR Plus | <<locked>> | 80% | 37,217 psi | 78% | 2431 fps | 95.6% |
| Shooters World Match Rifle | <<locked>> | 92% | 34,911 psi | 73% | 2438 fps | 95.1% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 34,838 psi | 73% | 2392 fps | 95.7% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 33,388 psi | 70% | 2333 fps | 97.4% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 33,228 psi | 69% | 2277 fps | 95.1% |
| SNPE Vectan Tubal 5000 | <<locked>> | 90% | 30,284 psi | 63% | 2228 fps | 95.2% |
| Somchem S335 | <<locked>> | 84% | 30,530 psi | 64% | 2241 fps | 95.3% |
| Vihtavuori N120 | <<locked>> | 80% | 39,494 psi | 83% | 2382 fps | 100% |
| Vihtavuori N130 | <<locked>> | 80% | 31,633 psi | 66% | 2251 fps | 98.4% |
| Vihtavuori N133 | <<locked>> | 80% | 27,456 psi | 57% | 2162 fps | 95.9% |
| Vihtavuori N135 | <<locked>> | 84% | 25,773 psi | 54% | 2195 fps | 95.5% |
| Vihtavuori N140 | <<locked>> | 90% | 32,909 psi | 69% | 2336 fps | 95.6% |
| Vihtavuori N540 | <<locked>> | 92% | 33,721 psi | 70% | 2369 fps | 95.2% |
| Winchester 748 | <<locked>> | 92% | 39,059 psi | 82% | 2513 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 41 powders for .308 Marlin Express loaded with the .308 | 150gr | Sierra GameKing. Alliant AR-Comp delivers the highest muzzle velocity at 2,598 fps; across all powders the maximum-charge window runs from 1,575 fps to 2,598 fps. Accurate 2495 gives the best case fill at 100 %, and 41 of the 41 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 150.0 gr projectile in 0.308" calls for a 1:14.5 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, Hodgdon H335 rank at the top here: for .308 Marlin Express with the .308 | 150gr | Sierra GameKing 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.