Load Specifications
Load data in caliber .308 Marlin Express with .308 | 170gr | Impala RNFP KO bullet and 47 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Lovex D073.6, Shooters World Match Rifle 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>> | 88% | 41,292 psi | 86% | 2270 fps | 99.8% |
| Accurate 2460 | <<locked>> | 86% | 41,945 psi | 88% | 2306 fps | 98.2% |
| Accurate 2495 | <<locked>> | 96% | 41,872 psi | 87% | 2346 fps | 99.9% |
| Accurate 2520 | <<locked>> | 90% | 41,727 psi | 87% | 2343 fps | 97.8% |
| Accurate 4064 | <<locked>> | 98% | 41,336 psi | 86% | 2362 fps | 98.8% |
| Accurate LT-30 | <<locked>> | 82% | 43,047 psi | 90% | 2228 fps | 99.3% |
| ADI AR 2219 | <<locked>> | 82% | 40,915 psi | 85% | 2310 fps | 99% |
| ADI Benchmark 8208 | <<locked>> | 90% | 42,221 psi | 88% | 2310 fps | 96% |
| Alliant AR-Comp | <<locked>> | 92% | 42,177 psi | 88% | 2365 fps | 100% |
| Alliant Reloder- TS 15.5ᴾ | <<locked>> | 100% | 43,149 psi | 90% | 2382 fps | 96% |
| Alliant Reloder-10x | <<locked>> | 84% | 41,655 psi | 87% | 2287 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 82% | 40,959 psi | 86% | 2218 fps | 99.2% |
| Bofors RP3ᴾ | <<locked>> | 100% | 42,714 psi | 89% | 2388 fps | 95.9% |
| Hodgdon Benchmark | <<locked>> | 88% | 42,699 psi | 89% | 2274 fps | 96.7% |
| Hodgdon BL-C2 | <<locked>> | 92% | 41,959 psi | 88% | 2369 fps | 96.7% |
| Hodgdon H322 | <<locked>> | 86% | 42,264 psi | 88% | 2333 fps | 99.2% |
| Hodgdon H335 | <<locked>> | 86% | 42,873 psi | 90% | 2349 fps | 98.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 33,417 psi | 70% | 1444 fps | 100% |
| IMR 3031 | <<locked>> | 94% | 42,844 psi | 90% | 2402 fps | 99.7% |
| IMR 4198 | <<locked>> | 84% | 42,670 psi | 89% | 2260 fps | 100% |
| IMR 8208 XBR | <<locked>> | 90% | 42,221 psi | 88% | 2310 fps | 96% |
| Lovex D073.5 | <<locked>> | 86% | 41,669 psi | 87% | 2303 fps | 96.9% |
| Lovex D073.6 | <<locked>> | 94% | 42,337 psi | 88% | 2365 fps | 97.9% |
| Lovex S062 | <<locked>> | 96% | 41,640 psi | 87% | 2320 fps | 96% |
| Norma 201 | <<locked>> | 92% | 41,901 psi | 88% | 2303 fps | 96% |
| Norma 202 | <<locked>> | 92% | 41,263 psi | 86% | 2323 fps | 98.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 33,779 psi | 71% | 1483 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 86% | 41,959 psi | 88% | 2306 fps | 97.4% |
| ReloadSwiss RS 60ᴾ | <<locked>> | 100% | 41,843 psi | 87% | 2405 fps | 96.6% |
| Rottweil R 901 | <<locked>> | 88% | 41,669 psi | 87% | 2280 fps | 98.1% |
| Rottweil R 902 | <<locked>> | 94% | 42,061 psi | 88% | 2300 fps | 96% |
| Shooters World Match Rifle | <<locked>> | 94% | 42,337 psi | 88% | 2365 fps | 97.9% |
| Shooters World Precision | <<locked>> | 96% | 41,640 psi | 87% | 2320 fps | 96% |
| SNPE Vectan SP 10 | <<locked>> | 82% | 41,220 psi | 86% | 2310 fps | 98.2% |
| SNPE Vectan SP 3 | <<locked>> | 84% | 41,597 psi | 87% | 2283 fps | 99.5% |
| SNPE Vectan Tubal 3000 | <<locked>> | 90% | 41,756 psi | 87% | 2241 fps | 98.2% |
| SNPE Vectan Tubal 5000 | <<locked>> | 98% | 42,598 psi | 89% | 2274 fps | 99.1% |
| Somchem S321 | <<locked>> | 88% | 42,424 psi | 89% | 2339 fps | 96.4% |
| Somchem S335 | <<locked>> | 92% | 43,250 psi | 90% | 2287 fps | 99.1% |
| Vihtavuori N130 | <<locked>> | 86% | 41,916 psi | 88% | 2241 fps | 100% |
| Vihtavuori N133 | <<locked>> | 90% | 41,060 psi | 86% | 2244 fps | 99.7% |
| Vihtavuori N135 | <<locked>> | 96% | 41,858 psi | 87% | 2339 fps | 99.9% |
| Vihtavuori N140 | <<locked>> | 94% | 41,379 psi | 86% | 2303 fps | 98.6% |
| Vihtavuori N150ᴾ | <<locked>> | 100% | 39,929 psi | 83% | 2287 fps | 95.9% |
| Vihtavuori N530 | <<locked>> | 90% | 42,090 psi | 88% | 2303 fps | 96% |
| Vihtavuori N540 | <<locked>> | 96% | 42,221 psi | 88% | 2336 fps | 98.3% |
| Winchester 748 | <<locked>> | 92% | 43,062 psi | 90% | 2382 fps | 97.2% |
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% | 32,837 psi | 69% | 2113 fps | 98.6% |
| Accurate 2460 | <<locked>> | 80% | 34,867 psi | 73% | 2175 fps | 96.4% |
| Accurate 2495 | <<locked>> | 80% | 26,194 psi | 55% | 2028 fps | 97% |
| Accurate 2520 | <<locked>> | 82% | 32,256 psi | 67% | 2162 fps | 95.1% |
| Accurate 4064 | <<locked>> | 86% | 29,530 psi | 62% | 2123 fps | 95.5% |
| Accurate LT-30 | <<locked>> | 80% | 40,625 psi | 85% | 2185 fps | 99% |
| ADI AR 2219 | <<locked>> | 80% | 38,261 psi | 80% | 2260 fps | 98.5% |
| ADI Benchmark 8208 | <<locked>> | 88% | 39,900 psi | 83% | 2267 fps | 95.3% |
| Alliant AR-Comp | 28.1 gr | 80% | 29,805 psi | 62% | 2126 fps | 99.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 98% | 40,799 psi | 85% | 2339 fps | 95.3% |
| Alliant Reloder-10x | <<locked>> | 80% | 37,115 psi | 78% | 2205 fps | 99.8% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 38,827 psi | 81% | 2182 fps | 98.9% |
| Bofors RP3 | <<locked>> | 98% | 40,292 psi | 84% | 2346 fps | 95.3% |
| Hodgdon Benchmark | <<locked>> | 84% | 37,942 psi | 79% | 2188 fps | 95.4% |
| Hodgdon BL-C2 | <<locked>> | 88% | 36,985 psi | 77% | 2274 fps | 95.3% |
| Hodgdon H322 | <<locked>> | 80% | 35,201 psi | 74% | 2201 fps | 97.8% |
| Hodgdon H335 | <<locked>> | 80% | 35,447 psi | 74% | 2211 fps | 96.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,077 psi | 52% | 1293 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 28,761 psi | 60% | 2103 fps | 96.5% |
| IMR 4198 | <<locked>> | 80% | 38,203 psi | 80% | 2188 fps | 100% |
| IMR 8208 XBR | <<locked>> | 88% | 39,900 psi | 83% | 2267 fps | 95.3% |
| Lovex D073.5 | <<locked>> | 82% | 36,680 psi | 77% | 2211 fps | 95.5% |
| Lovex D073.6 | 32.2 gr | 86% | 33,025 psi | 69% | 2192 fps | 95.4% |
| Lovex S062 | <<locked>> | 94% | 39,378 psi | 82% | 2277 fps | 95.4% |
| Norma 201 | <<locked>> | 90% | 39,624 psi | 83% | 2264 fps | 95.4% |
| Norma 202 | <<locked>> | 82% | 30,806 psi | 64% | 2113 fps | 95.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 25,193 psi | 53% | 1325 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 35,128 psi | 73% | 2175 fps | 95.5% |
| ReloadSwiss RS 60 | <<locked>> | 98% | 39,334 psi | 82% | 2352 fps | 95.7% |
| Rottweil R 901 | <<locked>> | 80% | 33,504 psi | 70% | 2119 fps | 95.9% |
| Rottweil R 902 | <<locked>> | 92% | 39,726 psi | 83% | 2257 fps | 95.3% |
| Shooters World Match Rifle | 32.2 gr | 86% | 33,025 psi | 69% | 2192 fps | 95.4% |
| Shooters World Precision | <<locked>> | 94% | 39,378 psi | 82% | 2277 fps | 95.4% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 38,638 psi | 81% | 2264 fps | 97.6% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 37,304 psi | 78% | 2205 fps | 98.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 31,546 psi | 66% | 2044 fps | 95.4% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 28,660 psi | 60% | 2001 fps | 95.5% |
| Somchem S321 | <<locked>> | 84% | 37,362 psi | 78% | 2247 fps | 95% |
| Somchem S335 | <<locked>> | 80% | 30,864 psi | 64% | 2047 fps | 96.2% |
| Vihtavuori N130 | <<locked>> | 80% | 35,563 psi | 74% | 2129 fps | 99.6% |
| Vihtavuori N133 | <<locked>> | 80% | 31,111 psi | 65% | 2054 fps | 98% |
| Vihtavuori N135 | <<locked>> | 80% | 26,658 psi | 56% | 2021 fps | 96.9% |
| Vihtavuori N140 | <<locked>> | 82% | 29,428 psi | 61% | 2057 fps | 95% |
| Vihtavuori N150 | <<locked>> | 98% | 37,666 psi | 79% | 2244 fps | 95.3% |
| Vihtavuori N530 | <<locked>> | 88% | 39,711 psi | 83% | 2264 fps | 95.4% |
| Vihtavuori N540 | <<locked>> | 86% | 31,604 psi | 66% | 2126 fps | 95.3% |
| Winchester 748 | <<locked>> | 86% | 35,969 psi | 75% | 2247 fps | 95.1% |
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 47 powders for .308 Marlin Express loaded with the .308 | 170gr | Impala RNFP KO. ReloadSwiss RS 60 delivers the highest muzzle velocity at 2,405 fps; across all powders the maximum-charge window runs from 1,444 fps to 2,405 fps. Alliant Reloder- TS 15.5 gives the best case fill at 100 %, and 47 of the 47 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (330 MPa), the top charges use 70–90 %, leaving at least 10 % headroom. The 170.0 gr projectile in 0.308" calls for a 1:12.5 twist; slower twists will usually not stabilise this weight. Alliant Reloder- TS 15.5, Bofors RP3, 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. Lovex D073.6, Shooters World Match Rifle, Alliant AR-Comp rank at the top here: for .308 Marlin Express with the .308 | 170gr | Impala RNFP KO 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.