Load Specifications
Load data in caliber .308 Marlin Express with .308 | 150gr | Barnes MRX BT bullet and 36 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Hodgdon H335, Accurate 2460 and Hodgdon H322.
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% | 41,684 psi | 87% | 2375 fps | 99.6% |
| Accurate 2015 | <<locked>> | 98% | 43,265 psi | 90% | 2487 fps | 99.4% |
| Accurate 2460 | <<locked>> | 94% | 41,756 psi | 87% | 2480 fps | 96.8% |
| Accurate 2495ᴾ | <<locked>> | 100% | 33,895 psi | 71% | 2398 fps | 98.2% |
| Accurate 2520 | <<locked>> | 98% | 41,626 psi | 87% | 2516 fps | 96.3% |
| Accurate LT-30 | <<locked>> | 88% | 42,873 psi | 90% | 2385 fps | 98.3% |
| Accurate LT-32 | <<locked>> | 88% | 43,308 psi | 90% | 2392 fps | 96.5% |
| ADI AR 2207 | <<locked>> | 86% | 41,669 psi | 87% | 2431 fps | 100% |
| ADI AR 2219 | <<locked>> | 90% | 42,656 psi | 89% | 2510 fps | 98.2% |
| Alliant AR-Compᴾ | <<locked>> | 100% | 42,772 psi | 89% | 2556 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 92% | 41,626 psi | 87% | 2470 fps | 99.8% |
| Alliant Reloder-7 | <<locked>> | 84% | 40,988 psi | 86% | 2398 fps | 99.8% |
| Baschieri & Pellagri 106 | <<locked>> | 88% | 40,828 psi | 85% | 2375 fps | 98.2% |
| Hodgdon H322 | <<locked>> | 92% | 41,147 psi | 86% | 2484 fps | 97.8% |
| Hodgdon H335 | <<locked>> | 92% | 41,742 psi | 87% | 2497 fps | 97% |
| Hodgdon H4198 | <<locked>> | 84% | 41,872 psi | 87% | 2379 fps | 97.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 31,256 psi | 65% | 1526 fps | 100% |
| IMR 3031ᴾ | <<locked>> | 100% | 40,727 psi | 85% | 2536 fps | 98.6% |
| IMR 4198 | <<locked>> | 90% | 41,916 psi | 88% | 2428 fps | 100% |
| Lovex D073.4 | <<locked>> | 88% | 43,047 psi | 90% | 2500 fps | 96.4% |
| Norma 200 | <<locked>> | 88% | 41,713 psi | 87% | 2457 fps | 99.9% |
| Norma 202ᴾ | <<locked>> | 100% | 41,321 psi | 86% | 2493 fps | 97% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 31,212 psi | 65% | 1565 fps | 100% |
| Rottweil R 901 | <<locked>> | 98% | 42,525 psi | 89% | 2480 fps | 97% |
| Shooters World AR Plus | <<locked>> | 88% | 43,047 psi | 90% | 2500 fps | 96.4% |
| SNPE Vectan BA6 1/2 | <<locked>> | 84% | 42,786 psi | 89% | 2211 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 90% | 42,685 psi | 89% | 2507 fps | 97.1% |
| SNPE Vectan SP 3 | <<locked>> | 92% | 42,902 psi | 90% | 2480 fps | 98.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 98% | 42,931 psi | 90% | 2425 fps | 97.1% |
| SNPE Vectan Tubal 5000ᴾ | <<locked>> | 100% | 36,172 psi | 76% | 2316 fps | 96.4% |
| Somchem S335 | <<locked>> | 98% | 40,872 psi | 85% | 2418 fps | 97.6% |
| Vihtavuori N120 | <<locked>> | 86% | 41,858 psi | 87% | 2392 fps | 100% |
| Vihtavuori N130 | <<locked>> | 94% | 42,830 psi | 89% | 2434 fps | 99.7% |
| Vihtavuori N133 | <<locked>> | 98% | 42,090 psi | 88% | 2431 fps | 99.1% |
| Vihtavuori N135ᴾ | <<locked>> | 100% | 36,361 psi | 76% | 2418 fps | 98.5% |
| Vihtavuori N140ᴾ | <<locked>> | 100% | 39,363 psi | 82% | 2431 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% | 39,204 psi | 82% | 2333 fps | 99.4% |
| Accurate 2015 | <<locked>> | 84% | 27,688 psi | 58% | 2175 fps | 95.6% |
| Accurate 2460 | 34 gr | 90% | 36,361 psi | 76% | 2382 fps | 95.3% |
| Accurate 2495 | <<locked>> | 92% | 25,686 psi | 54% | 2208 fps | 95.4% |
| Accurate 2520 | <<locked>> | 96% | 38,580 psi | 81% | 2461 fps | 95.5% |
| Accurate LT-30 | <<locked>> | 80% | 33,417 psi | 70% | 2205 fps | 95.9% |
| Accurate LT-32 | <<locked>> | 84% | 38,290 psi | 80% | 2300 fps | 95.1% |
| ADI AR 2207 | <<locked>> | 80% | 34,476 psi | 72% | 2306 fps | 100% |
| ADI AR 2219 | <<locked>> | 82% | 32,590 psi | 68% | 2306 fps | 95.3% |
| Alliant AR-Comp | <<locked>> | 80% | 22,843 psi | 48% | 2090 fps | 95.5% |
| Alliant Reloder-10x | <<locked>> | 80% | 28,660 psi | 60% | 2205 fps | 97.2% |
| Alliant Reloder-7 | <<locked>> | 80% | 36,143 psi | 76% | 2310 fps | 99.3% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 31,473 psi | 66% | 2195 fps | 95.5% |
| Hodgdon H322 | 30.9 gr | 86% | 33,779 psi | 71% | 2333 fps | 95.7% |
| Hodgdon H335 | 33.8 gr | 88% | 36,303 psi | 76% | 2392 fps | 95.4% |
| Hodgdon H4198 | <<locked>> | 80% | 36,927 psi | 77% | 2287 fps | 96.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 22,945 psi | 48% | 1362 fps | 100% |
| IMR 3031 | <<locked>> | 90% | 29,704 psi | 62% | 2293 fps | 95% |
| IMR 4198 | <<locked>> | 80% | 31,038 psi | 65% | 2211 fps | 98.6% |
| Lovex D073.4 | <<locked>> | 86% | 39,929 psi | 83% | 2448 fps | 95.5% |
| Norma 200 | <<locked>> | 80% | 32,285 psi | 67% | 2277 fps | 98.9% |
| Norma 202 | <<locked>> | 96% | 36,419 psi | 76% | 2402 fps | 95.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 22,742 psi | 48% | 1394 fps | 100% |
| Rottweil R 901 | <<locked>> | 92% | 35,679 psi | 75% | 2349 fps | 95.1% |
| Shooters World AR Plus | <<locked>> | 86% | 39,929 psi | 83% | 2448 fps | 95.5% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 38,305 psi | 80% | 2146 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 86% | 37,405 psi | 78% | 2408 fps | 95.7% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 29,385 psi | 61% | 2201 fps | 95.2% |
| SNPE Vectan Tubal 3000 | <<locked>> | 92% | 35,346 psi | 74% | 2287 fps | 95% |
| SNPE Vectan Tubal 5000 | <<locked>> | 96% | 32,198 psi | 67% | 2234 fps | 95% |
| Somchem S335 | <<locked>> | 90% | 32,010 psi | 67% | 2244 fps | 95% |
| Vihtavuori N120 | <<locked>> | 80% | 34,751 psi | 73% | 2274 fps | 100% |
| Vihtavuori N130 | <<locked>> | 80% | 27,673 psi | 58% | 2129 fps | 96.5% |
| Vihtavuori N133 | <<locked>> | 84% | 27,354 psi | 57% | 2126 fps | 95% |
| Vihtavuori N135 | <<locked>> | 90% | 26,672 psi | 56% | 2192 fps | 95.1% |
| Vihtavuori N140 | <<locked>> | 96% | 34,795 psi | 73% | 2339 fps | 95.3% |
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 36 powders for .308 Marlin Express loaded with the .308 | 150gr | Barnes MRX BT. Alliant AR-Comp delivers the highest muzzle velocity at 2,556 fps; across all powders the maximum-charge window runs from 1,526 fps to 2,556 fps. Accurate 2495 gives the best case fill at 100 %, and 36 of the 36 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (330 MPa), the top charges use 65–90 %, leaving at least 10 % headroom. The 150.0 gr projectile in 0.308" calls for a 1:11.5 twist; slower twists will usually not stabilise this weight. Accurate 2495, Alliant AR-Comp, 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. Hodgdon H335, Accurate 2460, Hodgdon H322 rank at the top here: for .308 Marlin Express with the .308 | 150gr | Barnes MRX BT 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.