Load Specifications
Load data in caliber .308 Win. Ackley Improved with .308 | 165gr | Geco EXPRESS bullet and 89 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>> | 92% | 53,287 psi | 89% | 2618 fps | 100% |
| Accurate 2200 | <<locked>> | 84% | 54,012 psi | 90% | 2697 fps | 98% |
| Accurate 2230 | <<locked>> | 82% | 50,908 psi | 85% | 2654 fps | 97.9% |
| Accurate 2460 | <<locked>> | 88% | 51,619 psi | 86% | 2635 fps | 100% |
| Accurate 2495 | <<locked>> | 98% | 52,547 psi | 87% | 2664 fps | 100% |
| Accurate 2520 | <<locked>> | 92% | 52,475 psi | 87% | 2684 fps | 100% |
| Accurate 4064ᴾ | <<locked>> | 100% | 52,040 psi | 86% | 2697 fps | 100% |
| Accurate LT-30 | <<locked>> | 86% | 54,114 psi | 90% | 2569 fps | 100% |
| Accurate LT-32 | <<locked>> | 84% | 51,343 psi | 85% | 2546 fps | 99.9% |
| ADI AR 2206H | <<locked>> | 94% | 51,924 psi | 86% | 2684 fps | 98.5% |
| ADI AR 2207 | <<locked>> | 82% | 52,228 psi | 87% | 2552 fps | 100% |
| ADI AR 2208ᴾ | <<locked>> | 100% | 53,055 psi | 88% | 2677 fps | 98% |
| ADI AR 2219 | <<locked>> | 86% | 53,838 psi | 89% | 2680 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 92% | 51,692 psi | 86% | 2651 fps | 99.3% |
| Alliant AR-Comp | <<locked>> | 94% | 53,621 psi | 89% | 2684 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 88% | 52,968 psi | 88% | 2749 fps | 99.1% |
| Alliant Power Pro 2000-MR | <<locked>> | 96% | 51,474 psi | 86% | 2772 fps | 97.5% |
| Alliant Reloder- TS 15.5ᴾ | <<locked>> | 100% | 51,561 psi | 86% | 2697 fps | 99.1% |
| Alliant Reloder-10x | <<locked>> | 88% | 53,243 psi | 88% | 2625 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 98% | 52,591 psi | 87% | 2713 fps | 98.2% |
| Alliant Reloder-17ᴾ | <<locked>> | 100% | 45,643 psi | 76% | 2677 fps | 97.7% |
| Alliant Reloder-7 | <<locked>> | 82% | 53,098 psi | 88% | 2569 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 86% | 53,200 psi | 88% | 2572 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 94% | 51,663 psi | 86% | 2694 fps | 97.4% |
| Bofors RP3ᴾ | <<locked>> | 100% | 51,358 psi | 85% | 2703 fps | 99.1% |
| Hodgdon Benchmark | <<locked>> | 92% | 54,404 psi | 90% | 2644 fps | 99.7% |
| Hodgdon BL-C2 | <<locked>> | 94% | 53,229 psi | 88% | 2723 fps | 99.7% |
| Hodgdon CFE223 | <<locked>> | 90% | 51,663 psi | 86% | 2756 fps | 98% |
| Hodgdon H322 | <<locked>> | 88% | 52,330 psi | 87% | 2661 fps | 100% |
| Hodgdon H335 | <<locked>> | 88% | 53,621 psi | 89% | 2690 fps | 100% |
| Hodgdon H380ᴾ | <<locked>> | 100% | 53,490 psi | 89% | 2713 fps | 97% |
| Hodgdon H4198 | <<locked>> | 82% | 53,142 psi | 88% | 2575 fps | 100% |
| Hodgdon H4895 | <<locked>> | 94% | 52,344 psi | 87% | 2694 fps | 98.9% |
| Hodgdon LEVERevolution | <<locked>> | 98% | 53,795 psi | 89% | 2769 fps | 99.4% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,011 psi | 57% | 1594 fps | 100% |
| Hodgdon VARGET | <<locked>> | 96% | 53,983 psi | 90% | 2700 fps | 99% |
| IMR 3031 | <<locked>> | 96% | 54,462 psi | 90% | 2740 fps | 100% |
| IMR 4064 | <<locked>> | 98% | 52,562 psi | 87% | 2664 fps | 98.1% |
| IMR 4198 | <<locked>> | 88% | 54,070 psi | 90% | 2592 fps | 100% |
| IMR 4895 | <<locked>> | 98% | 53,809 psi | 89% | 2746 fps | 98.8% |
| IMR 8208 XBR | <<locked>> | 92% | 51,692 psi | 86% | 2651 fps | 99.3% |
| Lovex D073.4 | <<locked>> | 82% | 51,619 psi | 86% | 2641 fps | 99.9% |
| Lovex D073.5 | <<locked>> | 88% | 51,430 psi | 85% | 2638 fps | 99.7% |
| Lovex D073.6 | <<locked>> | 96% | 53,751 psi | 89% | 2713 fps | 100% |
| Lovex S060 | <<locked>> | 94% | 53,142 psi | 88% | 2628 fps | 98.6% |
| Lovex S062 | <<locked>> | 98% | 51,605 psi | 86% | 2661 fps | 99.3% |
| Norma 200 | <<locked>> | 84% | 53,243 psi | 88% | 2602 fps | 100% |
| Norma 201 | <<locked>> | 96% | 54,099 psi | 90% | 2684 fps | 99.5% |
| Norma 202 | <<locked>> | 96% | 54,099 psi | 90% | 2694 fps | 100% |
| Norma 203B | <<locked>> | 98% | 51,677 psi | 86% | 2703 fps | 98.5% |
| Ramshot Big Game | <<locked>> | 98% | 52,098 psi | 87% | 2723 fps | 98.3% |
| Ramshot TAC | <<locked>> | 92% | 52,547 psi | 87% | 2657 fps | 96.1% |
| Ramshot Wild Boar | <<locked>> | 94% | 54,331 psi | 90% | 2723 fps | 98.7% |
| Ramshot X-Terminator | <<locked>> | 90% | 53,316 psi | 89% | 2654 fps | 98.5% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 34,171 psi | 57% | 1634 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 88% | 51,793 psi | 86% | 2648 fps | 99.8% |
| ReloadSwiss RS 52 | <<locked>> | 96% | 51,851 psi | 86% | 2769 fps | 98.1% |
| ReloadSwiss RS 60ᴾ | <<locked>> | 100% | 48,863 psi | 81% | 2749 fps | 99.8% |
| Rottweil R 901 | <<locked>> | 92% | 52,214 psi | 87% | 2635 fps | 100% |
| Rottweil R 902 | <<locked>> | 98% | 54,404 psi | 90% | 2680 fps | 99.5% |
| Rottweil R 903ᴾ | <<locked>> | 100% | 47,688 psi | 79% | 2638 fps | 98.4% |
| Shooters World AR Plus | <<locked>> | 82% | 51,619 psi | 86% | 2641 fps | 99.9% |
| Shooters World Match Rifle | <<locked>> | 96% | 53,751 psi | 89% | 2713 fps | 100% |
| Shooters World Precision | <<locked>> | 98% | 51,605 psi | 86% | 2661 fps | 99.3% |
| Shooters World Tactical Rifle | <<locked>> | 86% | 51,677 psi | 86% | 2608 fps | 99% |
| SNPE Vectan BA6 1/2 | <<locked>> | 82% | 52,373 psi | 87% | 2313 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 84% | 50,966 psi | 85% | 2644 fps | 100% |
| SNPE Vectan SP 11ᴾ | <<locked>> | 100% | 50,198 psi | 83% | 2703 fps | 98.1% |
| SNPE Vectan SP 3 | <<locked>> | 88% | 54,259 psi | 90% | 2644 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 94% | 53,417 psi | 89% | 2677 fps | 96.8% |
| SNPE Vectan SP 9 | <<locked>> | 96% | 53,679 psi | 89% | 2703 fps | 98.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 94% | 53,693 psi | 89% | 2598 fps | 100% |
| SNPE Vectan Tubal 5000ᴾ | <<locked>> | 100% | 52,518 psi | 87% | 2592 fps | 100% |
| Somchem S321 | <<locked>> | 90% | 52,837 psi | 88% | 2687 fps | 99.5% |
| Somchem S335 | <<locked>> | 94% | 52,286 psi | 87% | 2598 fps | 100% |
| Somchem S341 | <<locked>> | 94% | 52,910 psi | 88% | 2677 fps | 98.5% |
| Somchem S355ᴾ | <<locked>> | 100% | 48,834 psi | 81% | 2644 fps | 98.4% |
| Somchem S365ᴾ | <<locked>> | 100% | 35,114 psi | 58% | 2467 fps | 96.1% |
| Vihtavuori N120 | <<locked>> | 82% | 52,170 psi | 87% | 2507 fps | 100% |
| Vihtavuori N130 | <<locked>> | 90% | 53,476 psi | 89% | 2579 fps | 100% |
| Vihtavuori N133 | <<locked>> | 94% | 53,330 psi | 89% | 2592 fps | 100% |
| Vihtavuori N135 | <<locked>> | 98% | 52,707 psi | 88% | 2657 fps | 100% |
| Vihtavuori N140 | <<locked>> | 96% | 51,474 psi | 86% | 2631 fps | 100% |
| Vihtavuori N150ᴾ | <<locked>> | 100% | 47,108 psi | 78% | 2585 fps | 99.1% |
| Vihtavuori N530 | <<locked>> | 92% | 52,286 psi | 87% | 2651 fps | 99.3% |
| Vihtavuori N540 | <<locked>> | 98% | 52,953 psi | 88% | 2671 fps | 100% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 43,439 psi | 72% | 2523 fps | 97% |
| Winchester 748 | <<locked>> | 94% | 54,215 psi | 90% | 2743 fps | 99.9% |
| Winchester StaBALL Match | <<locked>> | 96% | 53,156 psi | 88% | 2713 fps | 99% |
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% | 36,637 psi | 61% | 2356 fps | 99.9% |
| Accurate 2200 | <<locked>> | 80% | 47,326 psi | 79% | 2592 fps | 96.8% |
| Accurate 2230 | <<locked>> | 80% | 47,427 psi | 79% | 2598 fps | 97.2% |
| Accurate 2460 | <<locked>> | 80% | 39,508 psi | 66% | 2438 fps | 99% |
| Accurate 2495 | <<locked>> | 80% | 29,066 psi | 48% | 2254 fps | 99.1% |
| Accurate 2520 | <<locked>> | 80% | 34,969 psi | 58% | 2385 fps | 97.8% |
| Accurate 4064 | <<locked>> | 80% | 27,514 psi | 46% | 2228 fps | 96.4% |
| Accurate LT-30 | <<locked>> | 80% | 45,382 psi | 75% | 2444 fps | 100% |
| Accurate LT-32 | <<locked>> | 80% | 45,759 psi | 76% | 2457 fps | 99.5% |
| ADI AR 2206H | <<locked>> | 84% | 38,174 psi | 63% | 2438 fps | 95.4% |
| ADI AR 2207 | <<locked>> | 80% | 49,023 psi | 81% | 2510 fps | 100% |
| ADI AR 2208 | <<locked>> | 92% | 41,698 psi | 69% | 2487 fps | 95.5% |
| ADI AR 2219 | <<locked>> | 80% | 43,932 psi | 73% | 2533 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 80% | 35,491 psi | 59% | 2359 fps | 96% |
| Alliant AR-Comp | <<locked>> | 80% | 33,779 psi | 56% | 2375 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 40,524 psi | 67% | 2533 fps | 96.9% |
| Alliant Power Pro 2000-MR | 45.6 gr | 92% | 44,962 psi | 75% | 2657 fps | 95.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 35,288 psi | 59% | 2405 fps | 95.6% |
| Alliant Reloder-10x | <<locked>> | 80% | 41,713 psi | 69% | 2454 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 90% | 40,944 psi | 68% | 2516 fps | 95.6% |
| Alliant Reloder-17 | <<locked>> | 94% | 37,652 psi | 63% | 2513 fps | 95.2% |
| Alliant Reloder-7 | <<locked>> | 80% | 49,966 psi | 83% | 2523 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 43,932 psi | 73% | 2438 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 88% | 42,395 psi | 70% | 2536 fps | 95.3% |
| Bofors RP3 | <<locked>> | 88% | 34,519 psi | 57% | 2402 fps | 95.5% |
| Hodgdon Benchmark | <<locked>> | 80% | 37,913 psi | 63% | 2365 fps | 97.3% |
| Hodgdon BL-C2 | <<locked>> | 80% | 33,257 psi | 55% | 2365 fps | 96% |
| Hodgdon CFE223 | 42.6 gr | 84% | 41,901 psi | 70% | 2585 fps | 95.8% |
| Hodgdon H322 | <<locked>> | 80% | 40,350 psi | 67% | 2470 fps | 99.7% |
| Hodgdon H335 | <<locked>> | 80% | 40,930 psi | 68% | 2487 fps | 99.3% |
| Hodgdon H380 | <<locked>> | 96% | 46,847 psi | 78% | 2608 fps | 95.6% |
| Hodgdon H4198 | <<locked>> | 80% | 49,980 psi | 83% | 2530 fps | 100% |
| Hodgdon H4895 | <<locked>> | 82% | 36,129 psi | 60% | 2402 fps | 95.4% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 34,185 psi | 57% | 2405 fps | 95.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,034 psi | 42% | 1421 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 37,217 psi | 62% | 2408 fps | 95.6% |
| IMR 3031 | <<locked>> | 80% | 32,387 psi | 54% | 2362 fps | 99.1% |
| IMR 4064 | <<locked>> | 90% | 41,133 psi | 68% | 2470 fps | 95.7% |
| IMR 4198 | <<locked>> | 80% | 42,888 psi | 71% | 2431 fps | 100% |
| IMR 4895 | <<locked>> | 86% | 36,782 psi | 61% | 2444 fps | 95.1% |
| IMR 8208 XBR | <<locked>> | 80% | 35,491 psi | 59% | 2359 fps | 96% |
| Lovex D073.4 | <<locked>> | 80% | 48,167 psi | 80% | 2592 fps | 99.7% |
| Lovex D073.5 | <<locked>> | 80% | 39,117 psi | 65% | 2434 fps | 98% |
| Lovex D073.6 | <<locked>> | 80% | 31,473 psi | 52% | 2320 fps | 96.6% |
| Lovex S060 | <<locked>> | 82% | 36,999 psi | 61% | 2343 fps | 95% |
| Lovex S062 | <<locked>> | 84% | 33,446 psi | 56% | 2329 fps | 95.4% |
| Norma 200 | <<locked>> | 80% | 47,137 psi | 78% | 2516 fps | 100% |
| Norma 201 | <<locked>> | 80% | 32,967 psi | 55% | 2300 fps | 95.2% |
| Norma 202 | <<locked>> | 80% | 32,764 psi | 54% | 2320 fps | 97.7% |
| Norma 203B | <<locked>> | 88% | 37,782 psi | 63% | 2457 fps | 95.3% |
| Ramshot Big Game | <<locked>> | 90% | 39,943 psi | 66% | 2513 fps | 95.6% |
| Ramshot TAC | <<locked>> | 90% | 49,255 psi | 82% | 2605 fps | 95.3% |
| Ramshot Wild Boar | <<locked>> | 84% | 39,189 psi | 65% | 2470 fps | 95.6% |
| Ramshot X-Terminator | <<locked>> | 80% | 38,566 psi | 64% | 2398 fps | 95.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 25,295 psi | 42% | 1457 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 40,074 psi | 67% | 2451 fps | 98.5% |
| ReloadSwiss RS 52 | 42.3 gr | 88% | 39,755 psi | 66% | 2552 fps | 95.2% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 31,125 psi | 52% | 2362 fps | 95% |
| Rottweil R 901 | <<locked>> | 80% | 36,637 psi | 61% | 2365 fps | 98.4% |
| Rottweil R 902 | <<locked>> | 82% | 33,417 psi | 56% | 2306 fps | 95.3% |
| Rottweil R 903 | <<locked>> | 90% | 34,403 psi | 57% | 2392 fps | 95.1% |
| Shooters World AR Plus | <<locked>> | 80% | 48,167 psi | 80% | 2592 fps | 99.7% |
| Shooters World Match Rifle | <<locked>> | 80% | 31,473 psi | 52% | 2320 fps | 96.6% |
| Shooters World Precision | <<locked>> | 84% | 33,446 psi | 56% | 2329 fps | 95.4% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 42,395 psi | 70% | 2461 fps | 97.5% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 49,937 psi | 83% | 2283 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 44,599 psi | 74% | 2543 fps | 99.7% |
| SNPE Vectan SP 11 | <<locked>> | 92% | 38,754 psi | 64% | 2497 fps | 95.3% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 42,380 psi | 70% | 2467 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 90% | 46,543 psi | 77% | 2569 fps | 95.3% |
| SNPE Vectan SP 9 | <<locked>> | 86% | 39,059 psi | 65% | 2454 fps | 95.6% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 34,824 psi | 58% | 2287 fps | 98.2% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 28,282 psi | 47% | 2156 fps | 97.3% |
| Somchem S321 | <<locked>> | 80% | 37,855 psi | 63% | 2431 fps | 97.1% |
| Somchem S335 | <<locked>> | 80% | 34,200 psi | 57% | 2290 fps | 98.7% |
| Somchem S341 | <<locked>> | 84% | 37,782 psi | 63% | 2421 fps | 95% |
| Somchem S355 | <<locked>> | 90% | 35,911 psi | 60% | 2408 fps | 95.3% |
| Somchem S365 | <<locked>> | 98% | 33,069 psi | 55% | 2418 fps | 95.2% |
| Vihtavuori N120 | <<locked>> | 80% | 49,008 psi | 81% | 2464 fps | 100% |
| Vihtavuori N130 | <<locked>> | 80% | 39,639 psi | 66% | 2372 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 34,737 psi | 58% | 2293 fps | 99.7% |
| Vihtavuori N135 | <<locked>> | 80% | 29,820 psi | 50% | 2260 fps | 99.2% |
| Vihtavuori N140 | <<locked>> | 80% | 30,922 psi | 51% | 2260 fps | 97.5% |
| Vihtavuori N150 | <<locked>> | 88% | 32,039 psi | 53% | 2303 fps | 95.5% |
| Vihtavuori N530 | <<locked>> | 80% | 35,201 psi | 58% | 2349 fps | 96% |
| Vihtavuori N540 | <<locked>> | 80% | 29,631 psi | 49% | 2244 fps | 96.5% |
| Winchester 6.5 StaBALL | <<locked>> | 96% | 38,101 psi | 63% | 2421 fps | 95.4% |
| Winchester 748 | <<locked>> | 80% | 34,011 psi | 57% | 2382 fps | 96.5% |
| Winchester StaBALL Match | <<locked>> | 84% | 35,650 psi | 59% | 2405 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 89 powders for .308 Win. Ackley Improved loaded with the .308 | 165gr | Geco EXPRESS. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,772 fps; across all powders the maximum-charge window runs from 1,594 fps to 2,772 fps. Accurate 4064 gives the best case fill at 100 %, and 89 of the 89 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 165.0 gr projectile in 0.308" calls for a 1:13.5 twist; slower twists will usually not stabilise this weight. Accurate 4064, ADI AR 2208, Alliant Reloder- TS 15.5 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 | 165gr | Geco EXPRESS 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.