Load Specifications
Load data in caliber .308 Marlin Express with .308 | 170gr | Swift A-Frame bullet and 58 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are IMR 3031, Winchester 748 and ReloadSwiss RS 60.
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>> | 88% | 42,163 psi | 88% | 2359 fps | 100% |
| Accurate 2460 | <<locked>> | 86% | 43,033 psi | 90% | 2405 fps | 99.1% |
| Accurate 2495 | <<locked>> | 96% | 43,018 psi | 90% | 2441 fps | 100% |
| Accurate 2520 | <<locked>> | 88% | 40,393 psi | 84% | 2398 fps | 98.4% |
| Accurate 4064 | <<locked>> | 98% | 42,757 psi | 89% | 2461 fps | 99.5% |
| ADI AR 2219 | <<locked>> | 82% | 42,250 psi | 88% | 2405 fps | 99.7% |
| ADI Benchmark 8208 | <<locked>> | 88% | 41,249 psi | 86% | 2372 fps | 96.9% |
| Alliant AR-Comp | <<locked>> | 90% | 41,553 psi | 87% | 2425 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 84% | 41,510 psi | 87% | 2451 fps | 96.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 98% | 42,670 psi | 89% | 2451 fps | 97% |
| Alliant Reloder-10x | <<locked>> | 84% | 42,670 psi | 89% | 2375 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 82% | 42,670 psi | 89% | 2320 fps | 99.8% |
| Bofors RP3 | <<locked>> | 98% | 42,163 psi | 88% | 2457 fps | 97% |
| Hodgdon Benchmark | <<locked>> | 86% | 41,220 psi | 86% | 2329 fps | 97.4% |
| Hodgdon BL-C2 | <<locked>> | 90% | 41,147 psi | 86% | 2431 fps | 97.6% |
| Hodgdon H322 | <<locked>> | 84% | 41,249 psi | 86% | 2388 fps | 99.6% |
| Hodgdon H335 | <<locked>> | 84% | 41,901 psi | 88% | 2408 fps | 99.1% |
| Hodgdon H4895 | <<locked>> | 90% | 41,495 psi | 87% | 2411 fps | 96.2% |
| Hodgdon LEVERevolution | <<locked>> | 94% | 42,409 psi | 89% | 2470 fps | 96.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 33,199 psi | 69% | 1499 fps | 100% |
| Hodgdon VARGET | <<locked>> | 92% | 42,960 psi | 90% | 2418 fps | 96.5% |
| IMR 3031 | <<locked>> | 92% | 42,366 psi | 89% | 2467 fps | 100% |
| IMR 4198 | <<locked>> | 82% | 41,568 psi | 87% | 2313 fps | 100% |
| IMR 4895 | <<locked>> | 94% | 42,105 psi | 88% | 2451 fps | 95.9% |
| IMR 8208 XBR | <<locked>> | 88% | 41,249 psi | 86% | 2372 fps | 96.9% |
| Lovex D073.5 | <<locked>> | 86% | 42,844 psi | 90% | 2402 fps | 98.1% |
| Lovex D073.6 | <<locked>> | 92% | 41,524 psi | 87% | 2431 fps | 98.6% |
| Lovex S060 | <<locked>> | 90% | 42,888 psi | 90% | 2352 fps | 95.8% |
| Lovex S062 | <<locked>> | 96% | 43,308 psi | 90% | 2428 fps | 97.5% |
| Norma 201 | <<locked>> | 92% | 42,946 psi | 90% | 2405 fps | 97.4% |
| Norma 202 | <<locked>> | 92% | 42,830 psi | 89% | 2425 fps | 99.3% |
| Norma 203B | <<locked>> | 96% | 43,294 psi | 90% | 2461 fps | 96.1% |
| Ramshot Wild Boar | <<locked>> | 90% | 42,569 psi | 89% | 2431 fps | 95.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 33,388 psi | 70% | 1539 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 84% | 40,944 psi | 86% | 2365 fps | 98.1% |
| ReloadSwiss RS 60 | <<locked>> | 98% | 40,857 psi | 85% | 2484 fps | 97.8% |
| Rottweil R 901 | <<locked>> | 88% | 41,829 psi | 87% | 2369 fps | 98.9% |
| Rottweil R 902 | <<locked>> | 92% | 40,756 psi | 85% | 2359 fps | 96.8% |
| Rottweil R 903ᴾ | <<locked>> | 100% | 41,727 psi | 87% | 2441 fps | 96.5% |
| Shooters World Match Rifle | <<locked>> | 92% | 41,524 psi | 87% | 2431 fps | 98.6% |
| Shooters World Precision | <<locked>> | 96% | 43,308 psi | 90% | 2428 fps | 97.5% |
| Shooters World Tactical Rifle | <<locked>> | 82% | 40,799 psi | 85% | 2329 fps | 96.3% |
| SNPE Vectan SP 10 | <<locked>> | 82% | 42,786 psi | 89% | 2411 fps | 99.1% |
| SNPE Vectan SP 3 | <<locked>> | 82% | 40,756 psi | 85% | 2343 fps | 99.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 90% | 43,004 psi | 90% | 2339 fps | 99.1% |
| SNPE Vectan Tubal 5000 | <<locked>> | 96% | 41,684 psi | 87% | 2333 fps | 99.6% |
| Somchem S321 | <<locked>> | 86% | 41,176 psi | 86% | 2395 fps | 97.2% |
| Somchem S335 | <<locked>> | 90% | 41,901 psi | 88% | 2343 fps | 99.5% |
| Somchem S355 | <<locked>> | 98% | 40,770 psi | 85% | 2405 fps | 96% |
| Vihtavuori N130 | <<locked>> | 86% | 43,308 psi | 90% | 2336 fps | 100% |
| Vihtavuori N133 | <<locked>> | 90% | 42,641 psi | 89% | 2343 fps | 100% |
| Vihtavuori N135 | <<locked>> | 94% | 41,365 psi | 86% | 2398 fps | 100% |
| Vihtavuori N140 | <<locked>> | 94% | 43,062 psi | 90% | 2405 fps | 99.4% |
| Vihtavuori N150ᴾ | <<locked>> | 100% | 41,582 psi | 87% | 2395 fps | 97.5% |
| Vihtavuori N530 | <<locked>> | 88% | 41,278 psi | 86% | 2369 fps | 97% |
| Vihtavuori N540 | <<locked>> | 94% | 41,640 psi | 87% | 2398 fps | 98.9% |
| Winchester 748 | <<locked>> | 90% | 42,105 psi | 88% | 2448 fps | 98% |
| Winchester StaBALL Match | <<locked>> | 92% | 41,553 psi | 87% | 2421 fps | 96.2% |
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% | 32,924 psi | 69% | 2192 fps | 99.3% |
| Accurate 2460 | <<locked>> | 80% | 35,404 psi | 74% | 2264 fps | 97.6% |
| Accurate 2495 | <<locked>> | 80% | 25,367 psi | 53% | 2083 fps | 97.6% |
| Accurate 2520 | <<locked>> | 80% | 30,777 psi | 64% | 2205 fps | 95.7% |
| Accurate 4064 | <<locked>> | 84% | 27,398 psi | 57% | 2146 fps | 95.7% |
| ADI AR 2219 | <<locked>> | 80% | 39,653 psi | 83% | 2362 fps | 99.4% |
| ADI Benchmark 8208 | <<locked>> | 84% | 36,535 psi | 76% | 2283 fps | 95.5% |
| Alliant AR-Comp | <<locked>> | 80% | 30,269 psi | 63% | 2211 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 82% | 38,595 psi | 81% | 2395 fps | 95.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 94% | 37,724 psi | 79% | 2359 fps | 95.6% |
| Alliant Reloder-10x | <<locked>> | 80% | 37,869 psi | 79% | 2293 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 39,929 psi | 83% | 2274 fps | 99.6% |
| Bofors RP3 | <<locked>> | 94% | 37,072 psi | 77% | 2362 fps | 95.5% |
| Hodgdon Benchmark | <<locked>> | 80% | 34,447 psi | 72% | 2195 fps | 95.5% |
| Hodgdon BL-C2 | <<locked>> | 84% | 33,649 psi | 70% | 2283 fps | 95.3% |
| Hodgdon H322 | <<locked>> | 80% | 36,260 psi | 76% | 2297 fps | 98.8% |
| Hodgdon H335 | <<locked>> | 80% | 36,695 psi | 77% | 2313 fps | 98.1% |
| Hodgdon H4895 | <<locked>> | 88% | 39,059 psi | 82% | 2365 fps | 95.5% |
| Hodgdon LEVERevolution | <<locked>> | 90% | 37,072 psi | 77% | 2365 fps | 95.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 24,671 psi | 52% | 1342 fps | 100% |
| Hodgdon VARGET | <<locked>> | 88% | 38,029 psi | 79% | 2326 fps | 95% |
| IMR 3031 | 31.5 gr | 80% | 28,805 psi | 60% | 2185 fps | 97.6% |
| IMR 4198 | <<locked>> | 80% | 39,291 psi | 82% | 2277 fps | 100% |
| IMR 4895 | <<locked>> | 92% | 39,566 psi | 83% | 2405 fps | 95.1% |
| IMR 8208 XBR | <<locked>> | 84% | 36,535 psi | 76% | 2283 fps | 95.5% |
| Lovex D073.5 | <<locked>> | 80% | 34,998 psi | 73% | 2257 fps | 96.2% |
| Lovex D073.6 | <<locked>> | 82% | 29,646 psi | 62% | 2188 fps | 95.2% |
| Lovex S060 | <<locked>> | 88% | 40,422 psi | 84% | 2310 fps | 95.1% |
| Lovex S062 | <<locked>> | 90% | 35,969 psi | 75% | 2290 fps | 95.5% |
| Norma 201 | <<locked>> | 86% | 35,694 psi | 75% | 2267 fps | 95.4% |
| Norma 202 | <<locked>> | 80% | 29,370 psi | 61% | 2152 fps | 95.9% |
| Norma 203B | <<locked>> | 94% | 40,335 psi | 84% | 2408 fps | 95.3% |
| Ramshot Wild Boar | <<locked>> | 88% | 40,103 psi | 84% | 2385 fps | 95% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 24,671 psi | 52% | 1371 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 36,172 psi | 76% | 2277 fps | 97% |
| ReloadSwiss RS 60 | 39.4 gr | 92% | 33,939 psi | 71% | 2326 fps | 95.2% |
| Rottweil R 901 | <<locked>> | 80% | 33,054 psi | 69% | 2195 fps | 96.9% |
| Rottweil R 902 | <<locked>> | 88% | 36,027 psi | 75% | 2267 fps | 95.4% |
| Rottweil R 903 | <<locked>> | 96% | 36,695 psi | 77% | 2346 fps | 95% |
| Shooters World Match Rifle | <<locked>> | 82% | 29,646 psi | 62% | 2188 fps | 95.2% |
| Shooters World Precision | <<locked>> | 90% | 35,969 psi | 75% | 2290 fps | 95.5% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 38,348 psi | 80% | 2283 fps | 95.6% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 40,219 psi | 84% | 2369 fps | 98.7% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 38,464 psi | 80% | 2300 fps | 99.6% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 31,763 psi | 66% | 2126 fps | 96.6% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 25,701 psi | 54% | 2001 fps | 95.3% |
| Somchem S321 | <<locked>> | 80% | 33,779 psi | 71% | 2251 fps | 95% |
| Somchem S335 | <<locked>> | 80% | 30,922 psi | 65% | 2129 fps | 97.3% |
| Somchem S355 | <<locked>> | 96% | 38,319 psi | 80% | 2359 fps | 95.2% |
| Vihtavuori N130 | <<locked>> | 80% | 36,187 psi | 76% | 2215 fps | 99.9% |
| Vihtavuori N133 | <<locked>> | 80% | 31,531 psi | 66% | 2139 fps | 98.9% |
| Vihtavuori N135 | <<locked>> | 80% | 26,571 psi | 56% | 2096 fps | 97.8% |
| Vihtavuori N140 | <<locked>> | 80% | 27,862 psi | 58% | 2096 fps | 95.6% |
| Vihtavuori N150 | <<locked>> | 94% | 34,447 psi | 72% | 2260 fps | 95.5% |
| Vihtavuori N530 | <<locked>> | 84% | 36,085 psi | 75% | 2274 fps | 95.5% |
| Vihtavuori N540 | <<locked>> | 82% | 28,427 psi | 59% | 2126 fps | 95.2% |
| Winchester 748 | 35 gr | 82% | 32,518 psi | 68% | 2251 fps | 95.1% |
| Winchester StaBALL Match | <<locked>> | 90% | 38,798 psi | 81% | 2372 fps | 95.4% |
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 58 powders for .308 Marlin Express loaded with the .308 | 170gr | Swift A-Frame. ReloadSwiss RS 60 delivers the highest muzzle velocity at 2,484 fps; across all powders the maximum-charge window runs from 1,499 fps to 2,484 fps. Hodgdon TrailBoss gives the best case fill at 100 %, and 58 of the 58 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (330 MPa), the top charges use 69–90 %, leaving at least 10 % headroom. The 170.0 gr projectile in 0.308" calls for a 1:6.0 twist; slower twists will usually not stabilise this weight. Hodgdon TrailBoss, ReloadSwiss RS 14, Rottweil R 903 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, Winchester 748, ReloadSwiss RS 60 rank at the top here: for .308 Marlin Express with the .308 | 170gr | Swift A-Frame 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.