Load Specifications
Load data in caliber .308 Win. Ackley Improved with .308 | 170gr | Geco PLUS bullet and 85 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Power Pro 2000-MR, ReloadSwiss RS 52 and Hodgdon CFE223.
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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You can find more information in our FAQ: How can I use the Personalized Load Calculator?
Max Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 90% | 53,026 psi | 88% | 2589 fps | 100% |
| Accurate 2200 | <<locked>> | 82% | 53,272 psi | 89% | 2667 fps | 98.4% |
| Accurate 2230 | <<locked>> | 82% | 54,099 psi | 90% | 2680 fps | 98.8% |
| Accurate 2460 | <<locked>> | 86% | 51,300 psi | 85% | 2605 fps | 100% |
| Accurate 2495 | <<locked>> | 96% | 53,069 psi | 88% | 2641 fps | 100% |
| Accurate 2520 | <<locked>> | 90% | 52,750 psi | 88% | 2664 fps | 100% |
| Accurate 4064 | <<locked>> | 98% | 52,460 psi | 87% | 2677 fps | 100% |
| Accurate LT-30 | <<locked>> | 84% | 53,505 psi | 89% | 2539 fps | 100% |
| Accurate LT-32 | <<locked>> | 84% | 53,969 psi | 90% | 2562 fps | 100% |
| ADI AR 2206H | <<locked>> | 92% | 52,112 psi | 87% | 2667 fps | 98.9% |
| ADI AR 2208 | <<locked>> | 98% | 52,924 psi | 88% | 2657 fps | 98.5% |
| ADI AR 2219 | <<locked>> | 84% | 53,403 psi | 89% | 2651 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 90% | 51,503 psi | 86% | 2628 fps | 99.5% |
| Alliant AR-Comp | <<locked>> | 92% | 53,896 psi | 90% | 2657 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 86% | 52,765 psi | 88% | 2723 fps | 99.4% |
| Alliant Power Pro 2000-MR | <<locked>> | 94% | 51,198 psi | 85% | 2756 fps | 98.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 98% | 51,721 psi | 86% | 2677 fps | 99.5% |
| Alliant Reloder-10x | <<locked>> | 86% | 53,011 psi | 88% | 2595 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 96% | 52,736 psi | 88% | 2697 fps | 98.7% |
| Alliant Reloder-17ᴾ | <<locked>> | 100% | 48,849 psi | 81% | 2720 fps | 98.9% |
| Baschieri & Pellagri 106 | <<locked>> | 84% | 52,417 psi | 87% | 2539 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 92% | 51,271 psi | 85% | 2671 fps | 98% |
| Bofors RP3 | <<locked>> | 98% | 51,909 psi | 86% | 2690 fps | 99.5% |
| Hodgdon Benchmark | <<locked>> | 90% | 53,780 psi | 89% | 2615 fps | 99.9% |
| Hodgdon BL-C2 | <<locked>> | 92% | 53,374 psi | 89% | 2703 fps | 99.9% |
| Hodgdon CFE223 | <<locked>> | 88% | 51,445 psi | 85% | 2733 fps | 98.5% |
| Hodgdon H322 | <<locked>> | 86% | 52,025 psi | 86% | 2631 fps | 100% |
| Hodgdon H335 | <<locked>> | 86% | 53,084 psi | 88% | 2657 fps | 100% |
| Hodgdon H380 | <<locked>> | 98% | 53,708 psi | 89% | 2697 fps | 97.7% |
| Hodgdon H4895 | <<locked>> | 92% | 52,489 psi | 87% | 2677 fps | 99.3% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 38,624 psi | 64% | 2464 fps | 96.5% |
| Hodgdon LEVERevolution | <<locked>> | 96% | 54,143 psi | 90% | 2749 fps | 99.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,156 psi | 57% | 1588 fps | 100% |
| Hodgdon VARGET | <<locked>> | 94% | 53,969 psi | 90% | 2680 fps | 99.4% |
| IMR 3031 | <<locked>> | 92% | 51,271 psi | 85% | 2671 fps | 100% |
| IMR 4064 | <<locked>> | 96% | 52,257 psi | 87% | 2641 fps | 98.6% |
| IMR 4198 | <<locked>> | 86% | 53,824 psi | 89% | 2562 fps | 100% |
| IMR 4895 | <<locked>> | 96% | 53,983 psi | 90% | 2726 fps | 99.2% |
| IMR 8208 XBR | <<locked>> | 90% | 51,503 psi | 86% | 2628 fps | 99.5% |
| Lovex D073.5 | <<locked>> | 86% | 51,387 psi | 85% | 2615 fps | 99.9% |
| Lovex D073.6 | <<locked>> | 94% | 53,983 psi | 90% | 2694 fps | 100% |
| Lovex S060 | <<locked>> | 92% | 52,808 psi | 88% | 2602 fps | 99% |
| Lovex S062 | <<locked>> | 96% | 51,488 psi | 86% | 2638 fps | 99.6% |
| Norma 200 | <<locked>> | 82% | 53,185 psi | 88% | 2575 fps | 100% |
| Norma 201 | <<locked>> | 94% | 53,853 psi | 89% | 2661 fps | 99.7% |
| Norma 202 | <<locked>> | 94% | 54,317 psi | 90% | 2674 fps | 100% |
| Norma 203B | <<locked>> | 96% | 51,793 psi | 86% | 2684 fps | 98.9% |
| Ramshot Big Game | <<locked>> | 96% | 51,996 psi | 86% | 2703 fps | 98.8% |
| Ramshot TAC | <<locked>> | 90% | 52,025 psi | 86% | 2631 fps | 96.7% |
| Ramshot Wild Boar | <<locked>> | 92% | 54,288 psi | 90% | 2703 fps | 99.1% |
| Ramshot X-Terminator | <<locked>> | 88% | 52,953 psi | 88% | 2628 fps | 98.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 34,664 psi | 58% | 1631 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 86% | 51,358 psi | 85% | 2618 fps | 100% |
| ReloadSwiss RS 52 | <<locked>> | 94% | 52,112 psi | 87% | 2753 fps | 98.6% |
| ReloadSwiss RS 60ᴾ | <<locked>> | 100% | 52,272 psi | 87% | 2789 fps | 100% |
| Rottweil R 901 | <<locked>> | 90% | 51,895 psi | 86% | 2608 fps | 100% |
| Rottweil R 902 | <<locked>> | 96% | 54,172 psi | 90% | 2654 fps | 99.7% |
| Rottweil R 903ᴾ | <<locked>> | 100% | 51,372 psi | 85% | 2674 fps | 99.3% |
| Shooters World Match Rifle | <<locked>> | 94% | 53,983 psi | 90% | 2694 fps | 100% |
| Shooters World Precision | <<locked>> | 96% | 51,488 psi | 86% | 2638 fps | 99.6% |
| Shooters World Tactical Rifle | <<locked>> | 84% | 51,068 psi | 85% | 2582 fps | 99.3% |
| SNPE Vectan BA6 1/2 | <<locked>> | 82% | 54,259 psi | 90% | 2313 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 84% | 53,969 psi | 90% | 2664 fps | 100% |
| SNPE Vectan SP 11ᴾ | <<locked>> | 100% | 53,476 psi | 89% | 2733 fps | 99.1% |
| SNPE Vectan SP 3 | <<locked>> | 86% | 54,012 psi | 90% | 2615 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 92% | 53,287 psi | 89% | 2657 fps | 97.5% |
| SNPE Vectan SP 9 | <<locked>> | 94% | 53,621 psi | 89% | 2684 fps | 99.1% |
| SNPE Vectan Tubal 3000 | <<locked>> | 92% | 53,432 psi | 89% | 2575 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 98% | 52,504 psi | 87% | 2566 fps | 100% |
| Somchem S321 | <<locked>> | 88% | 52,605 psi | 87% | 2664 fps | 99.8% |
| Somchem S335 | <<locked>> | 92% | 52,083 psi | 87% | 2572 fps | 100% |
| Somchem S341 | <<locked>> | 92% | 52,460 psi | 87% | 2651 fps | 98.9% |
| Somchem S355ᴾ | <<locked>> | 100% | 52,431 psi | 87% | 2677 fps | 99.3% |
| Somchem S365ᴾ | <<locked>> | 100% | 37,681 psi | 63% | 2513 fps | 97.8% |
| Vihtavuori N130 | <<locked>> | 88% | 53,084 psi | 88% | 2549 fps | 100% |
| Vihtavuori N133 | <<locked>> | 92% | 53,214 psi | 88% | 2566 fps | 100% |
| Vihtavuori N135 | <<locked>> | 96% | 53,127 psi | 88% | 2635 fps | 100% |
| Vihtavuori N140 | <<locked>> | 94% | 51,285 psi | 85% | 2605 fps | 100% |
| Vihtavuori N150ᴾ | <<locked>> | 100% | 50,560 psi | 84% | 2615 fps | 99.7% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 44,570 psi | 74% | 2566 fps | 96.1% |
| Vihtavuori N530 | <<locked>> | 90% | 52,040 psi | 86% | 2628 fps | 99.6% |
| Vihtavuori N540 | <<locked>> | 96% | 52,895 psi | 88% | 2648 fps | 100% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 46,108 psi | 77% | 2559 fps | 98.3% |
| Winchester 748 | <<locked>> | 92% | 54,041 psi | 90% | 2717 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 94% | 53,171 psi | 88% | 2694 fps | 99.4% |
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% | 38,972 psi | 65% | 2375 fps | 100% |
| Accurate 2200 | <<locked>> | 80% | 50,125 psi | 83% | 2618 fps | 98% |
| Accurate 2230 | <<locked>> | 80% | 50,546 psi | 84% | 2628 fps | 98.3% |
| Accurate 2460 | <<locked>> | 80% | 42,105 psi | 70% | 2464 fps | 99.6% |
| Accurate 2495 | <<locked>> | 80% | 31,299 psi | 52% | 2280 fps | 99.8% |
| Accurate 2520 | <<locked>> | 80% | 37,463 psi | 62% | 2415 fps | 98.8% |
| Accurate 4064 | <<locked>> | 80% | 29,646 psi | 49% | 2260 fps | 97.8% |
| Accurate LT-30 | <<locked>> | 80% | 47,587 psi | 79% | 2457 fps | 100% |
| Accurate LT-32 | <<locked>> | 80% | 47,964 psi | 80% | 2474 fps | 99.9% |
| ADI AR 2206H | <<locked>> | 80% | 35,795 psi | 59% | 2369 fps | 95.3% |
| ADI AR 2208 | <<locked>> | 88% | 39,044 psi | 65% | 2418 fps | 95.5% |
| ADI AR 2219 | <<locked>> | 80% | 46,702 psi | 78% | 2552 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 80% | 37,724 psi | 63% | 2385 fps | 97.3% |
| Alliant AR-Comp | <<locked>> | 80% | 36,172 psi | 60% | 2395 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 43,352 psi | 72% | 2566 fps | 98.1% |
| Alliant Power Pro 2000-MR | 45.2 gr | 88% | 41,887 psi | 70% | 2582 fps | 95.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 33,156 psi | 55% | 2336 fps | 95.6% |
| Alliant Reloder-10x | <<locked>> | 80% | 44,280 psi | 74% | 2470 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 86% | 38,508 psi | 64% | 2448 fps | 95.6% |
| Alliant Reloder-17 | <<locked>> | 90% | 35,157 psi | 58% | 2444 fps | 95.1% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 46,122 psi | 77% | 2451 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 39,465 psi | 66% | 2464 fps | 95.1% |
| Bofors RP3 | <<locked>> | 84% | 32,358 psi | 54% | 2333 fps | 95.4% |
| Hodgdon Benchmark | <<locked>> | 80% | 39,900 psi | 66% | 2388 fps | 98.3% |
| Hodgdon BL-C2 | <<locked>> | 80% | 35,476 psi | 59% | 2392 fps | 97.3% |
| Hodgdon CFE223 | 42.1 gr | 80% | 39,117 psi | 65% | 2510 fps | 95.7% |
| Hodgdon H322 | <<locked>> | 80% | 42,757 psi | 71% | 2490 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 43,366 psi | 72% | 2507 fps | 99.8% |
| Hodgdon H380 | <<locked>> | 92% | 43,976 psi | 73% | 2543 fps | 95.7% |
| Hodgdon H4895 | <<locked>> | 80% | 35,984 psi | 60% | 2379 fps | 96.1% |
| Hodgdon Hybrid 100V | <<locked>> | 98% | 36,419 psi | 61% | 2418 fps | 95.8% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 32,024 psi | 53% | 2336 fps | 95% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,454 psi | 42% | 1421 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 34,563 psi | 57% | 2333 fps | 95.5% |
| IMR 3031 | <<locked>> | 80% | 34,635 psi | 58% | 2388 fps | 99.8% |
| IMR 4064 | <<locked>> | 86% | 38,609 psi | 64% | 2405 fps | 95.7% |
| IMR 4198 | <<locked>> | 80% | 45,121 psi | 75% | 2441 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 34,490 psi | 57% | 2375 fps | 95% |
| IMR 8208 XBR | <<locked>> | 80% | 37,724 psi | 63% | 2385 fps | 97.3% |
| Lovex D073.5 | <<locked>> | 80% | 41,872 psi | 70% | 2464 fps | 99% |
| Lovex D073.6 | <<locked>> | 80% | 33,620 psi | 56% | 2346 fps | 97.9% |
| Lovex S060 | <<locked>> | 80% | 36,666 psi | 61% | 2320 fps | 95.6% |
| Lovex S062 | <<locked>> | 80% | 31,459 psi | 52% | 2264 fps | 95.4% |
| Norma 200 | <<locked>> | 80% | 49,763 psi | 83% | 2526 fps | 100% |
| Norma 201 | <<locked>> | 80% | 34,969 psi | 58% | 2326 fps | 96.6% |
| Norma 202 | <<locked>> | 80% | 34,867 psi | 58% | 2346 fps | 98.7% |
| Norma 203B | <<locked>> | 84% | 35,375 psi | 59% | 2385 fps | 95.2% |
| Ramshot Big Game | <<locked>> | 86% | 37,478 psi | 62% | 2444 fps | 95.5% |
| Ramshot TAC | <<locked>> | 86% | 45,643 psi | 76% | 2530 fps | 95.2% |
| Ramshot Wild Boar | <<locked>> | 80% | 36,419 psi | 61% | 2392 fps | 95.5% |
| Ramshot X-Terminator | <<locked>> | 80% | 40,944 psi | 68% | 2428 fps | 96.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 25,469 psi | 42% | 1450 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 42,221 psi | 70% | 2470 fps | 99.3% |
| ReloadSwiss RS 52 | 41.8 gr | 84% | 37,130 psi | 62% | 2480 fps | 95.1% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 31,009 psi | 52% | 2349 fps | 96% |
| Rottweil R 901 | <<locked>> | 80% | 38,580 psi | 64% | 2382 fps | 99.2% |
| Rottweil R 902 | <<locked>> | 80% | 33,388 psi | 55% | 2283 fps | 96% |
| Rottweil R 903 | <<locked>> | 86% | 32,518 psi | 54% | 2329 fps | 95.1% |
| Shooters World Match Rifle | <<locked>> | 80% | 33,620 psi | 56% | 2346 fps | 97.9% |
| Shooters World Precision | <<locked>> | 80% | 31,459 psi | 52% | 2264 fps | 95.4% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 44,773 psi | 74% | 2484 fps | 98.5% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 51,851 psi | 86% | 2283 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 47,181 psi | 78% | 2562 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 36,376 psi | 60% | 2428 fps | 95.3% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 44,933 psi | 75% | 2484 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 86% | 43,410 psi | 72% | 2500 fps | 95.3% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 36,477 psi | 61% | 2382 fps | 95.5% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 36,854 psi | 61% | 2310 fps | 99% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 30,066 psi | 50% | 2182 fps | 98.4% |
| Somchem S321 | <<locked>> | 80% | 40,103 psi | 67% | 2454 fps | 98.2% |
| Somchem S335 | <<locked>> | 80% | 36,143 psi | 60% | 2310 fps | 99.4% |
| Somchem S341 | <<locked>> | 82% | 37,405 psi | 62% | 2395 fps | 95.7% |
| Somchem S355 | <<locked>> | 86% | 33,895 psi | 56% | 2343 fps | 95.3% |
| Somchem S365 | <<locked>> | 94% | 31,227 psi | 52% | 2359 fps | 95.3% |
| Vihtavuori N130 | <<locked>> | 80% | 41,887 psi | 70% | 2385 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 36,869 psi | 61% | 2313 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 32,053 psi | 53% | 2287 fps | 99.8% |
| Vihtavuori N140 | <<locked>> | 80% | 33,083 psi | 55% | 2290 fps | 98.6% |
| Vihtavuori N150 | <<locked>> | 84% | 30,240 psi | 50% | 2241 fps | 95.5% |
| Vihtavuori N160 | <<locked>> | 98% | 41,989 psi | 70% | 2516 fps | 95.4% |
| Vihtavuori N530 | <<locked>> | 80% | 37,507 psi | 62% | 2379 fps | 97.3% |
| Vihtavuori N540 | <<locked>> | 80% | 31,662 psi | 53% | 2270 fps | 97.8% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 35,389 psi | 59% | 2352 fps | 95.3% |
| Winchester 748 | <<locked>> | 80% | 36,274 psi | 60% | 2415 fps | 97.9% |
| Winchester StaBALL Match | <<locked>> | 80% | 33,359 psi | 55% | 2336 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 85 powders for .308 Win. Ackley Improved loaded with the .308 | 170gr | Geco PLUS. ReloadSwiss RS 60 delivers the highest muzzle velocity at 2,789 fps; across all powders the maximum-charge window runs from 1,588 fps to 2,789 fps. Alliant Reloder-17 gives the best case fill at 100 %, and 85 of the 85 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (415 MPa), the top charges use 57–90 %, leaving at least 10 % headroom. The 170.0 gr projectile in 0.308" calls for a 1:15.5 twist; slower twists will usually not stabilise this weight. Alliant Reloder-17, Hodgdon Hybrid 100V, 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. Alliant Power Pro 2000-MR, ReloadSwiss RS 52, Hodgdon CFE223 rank at the top here: for .308 Win. Ackley Improved with the .308 | 170gr | Geco PLUS 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.