Load Specifications
Load data in caliber .308 Win. Ackley Improved with .308 | 165gr | Geco STAR bullet and 88 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>> | 94% | 54,418 psi | 90% | 2635 fps | 100% |
| Accurate 2200 | <<locked>> | 84% | 52,388 psi | 87% | 2674 fps | 97.7% |
| Accurate 2230 | <<locked>> | 84% | 52,736 psi | 88% | 2680 fps | 98.1% |
| Accurate 2460 | <<locked>> | 90% | 52,939 psi | 88% | 2654 fps | 100% |
| Accurate 2495ᴾ | <<locked>> | 100% | 53,214 psi | 88% | 2677 fps | 100% |
| Accurate 2520 | <<locked>> | 94% | 53,998 psi | 90% | 2707 fps | 100% |
| Accurate 4064ᴾ | <<locked>> | 100% | 49,356 psi | 82% | 2664 fps | 100% |
| Accurate LT-30 | <<locked>> | 86% | 52,634 psi | 87% | 2549 fps | 100% |
| Accurate LT-32 | <<locked>> | 86% | 53,113 psi | 88% | 2569 fps | 99.9% |
| ADI AR 2206H | <<locked>> | 96% | 53,534 psi | 89% | 2707 fps | 98.6% |
| ADI AR 2207 | <<locked>> | 84% | 53,722 psi | 89% | 2575 fps | 100% |
| ADI AR 2208ᴾ | <<locked>> | 100% | 51,256 psi | 85% | 2648 fps | 97.6% |
| ADI AR 2219 | <<locked>> | 86% | 52,156 psi | 87% | 2661 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 94% | 53,272 psi | 89% | 2671 fps | 99.4% |
| Alliant AR-Comp | <<locked>> | 94% | 51,721 psi | 86% | 2664 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 90% | 54,128 psi | 90% | 2769 fps | 99.2% |
| Alliant Power Pro 2000-MR | <<locked>> | 98% | 52,982 psi | 88% | 2795 fps | 97.7% |
| Alliant Reloder- TS 15.5ᴾ | <<locked>> | 100% | 49,559 psi | 82% | 2664 fps | 98.8% |
| Alliant Reloder-10x | <<locked>> | 88% | 51,314 psi | 85% | 2602 fps | 100% |
| Alliant Reloder-15ᴾ | <<locked>> | 100% | 53,882 psi | 90% | 2733 fps | 98.3% |
| Alliant Reloder-17ᴾ | <<locked>> | 100% | 44,005 psi | 73% | 2644 fps | 97.2% |
| Alliant Reloder-7 | <<locked>> | 82% | 51,300 psi | 85% | 2546 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 86% | 51,459 psi | 85% | 2549 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 96% | 53,040 psi | 88% | 2713 fps | 97.6% |
| Bofors RP3ᴾ | <<locked>> | 100% | 49,124 psi | 82% | 2671 fps | 98.8% |
| Hodgdon Benchmark | <<locked>> | 92% | 52,591 psi | 87% | 2618 fps | 99.6% |
| Hodgdon BL-C2 | <<locked>> | 94% | 51,198 psi | 85% | 2694 fps | 99.5% |
| Hodgdon CFE223 | <<locked>> | 92% | 53,301 psi | 89% | 2782 fps | 98.2% |
| Hodgdon H322 | <<locked>> | 90% | 54,085 psi | 90% | 2684 fps | 100% |
| Hodgdon H335 | <<locked>> | 88% | 51,634 psi | 86% | 2661 fps | 100% |
| Hodgdon H380ᴾ | <<locked>> | 100% | 51,459 psi | 85% | 2680 fps | 96.6% |
| Hodgdon H4198 | <<locked>> | 82% | 51,634 psi | 86% | 2552 fps | 100% |
| Hodgdon H4895 | <<locked>> | 96% | 53,896 psi | 90% | 2717 fps | 99.1% |
| Hodgdon LEVERevolution | <<locked>> | 98% | 51,967 psi | 86% | 2740 fps | 99.2% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 33,649 psi | 56% | 1588 fps | 100% |
| Hodgdon VARGET | <<locked>> | 96% | 52,170 psi | 87% | 2674 fps | 98.8% |
| IMR 3031 | <<locked>> | 96% | 52,228 psi | 87% | 2713 fps | 100% |
| IMR 4064ᴾ | <<locked>> | 100% | 53,983 psi | 90% | 2680 fps | 98.3% |
| IMR 4198 | <<locked>> | 88% | 52,431 psi | 87% | 2572 fps | 100% |
| IMR 4895 | <<locked>> | 98% | 51,822 psi | 86% | 2717 fps | 98.5% |
| IMR 8208 XBR | <<locked>> | 94% | 53,272 psi | 89% | 2671 fps | 99.4% |
| Lovex D073.4 | <<locked>> | 84% | 53,055 psi | 88% | 2664 fps | 99.9% |
| Lovex D073.5 | <<locked>> | 90% | 52,808 psi | 88% | 2657 fps | 99.7% |
| Lovex D073.6 | <<locked>> | 96% | 51,459 psi | 85% | 2684 fps | 99.9% |
| Lovex S060 | <<locked>> | 94% | 51,387 psi | 85% | 2598 fps | 98.3% |
| Lovex S062ᴾ | <<locked>> | 100% | 52,794 psi | 88% | 2680 fps | 99.4% |
| Norma 200 | <<locked>> | 86% | 54,375 psi | 90% | 2621 fps | 100% |
| Norma 201 | <<locked>> | 96% | 51,837 psi | 86% | 2654 fps | 99.3% |
| Norma 202 | <<locked>> | 96% | 52,388 psi | 87% | 2671 fps | 100% |
| Norma 203Bᴾ | <<locked>> | 100% | 52,866 psi | 88% | 2720 fps | 98.6% |
| Ramshot Big Gameᴾ | <<locked>> | 100% | 53,563 psi | 89% | 2746 fps | 98.5% |
| Ramshot TAC | <<locked>> | 94% | 53,940 psi | 90% | 2677 fps | 96.3% |
| Ramshot Wild Boar | <<locked>> | 94% | 52,489 psi | 87% | 2697 fps | 98.4% |
| Ramshot X-Terminator | <<locked>> | 90% | 51,532 psi | 86% | 2625 fps | 98.1% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 33,736 psi | 56% | 1624 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 90% | 53,040 psi | 88% | 2664 fps | 99.9% |
| ReloadSwiss RS 52 | <<locked>> | 98% | 53,548 psi | 89% | 2795 fps | 98.3% |
| ReloadSwiss RS 60ᴾ | <<locked>> | 100% | 47,137 psi | 78% | 2720 fps | 99.7% |
| Rottweil R 901 | <<locked>> | 94% | 52,852 psi | 88% | 2648 fps | 100% |
| Rottweil R 902 | <<locked>> | 98% | 52,214 psi | 87% | 2648 fps | 99.3% |
| Rottweil R 903ᴾ | <<locked>> | 100% | 45,527 psi | 76% | 2605 fps | 98% |
| Shooters World AR Plus | <<locked>> | 84% | 53,055 psi | 88% | 2664 fps | 99.9% |
| Shooters World Match Rifle | <<locked>> | 96% | 51,459 psi | 85% | 2684 fps | 99.9% |
| Shooters World Precisionᴾ | <<locked>> | 100% | 52,794 psi | 88% | 2680 fps | 99.4% |
| Shooters World Tactical Rifle | <<locked>> | 88% | 53,795 psi | 89% | 2638 fps | 99.2% |
| SNPE Vectan BA6 1/2 | <<locked>> | 84% | 53,983 psi | 90% | 2333 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 86% | 52,431 psi | 87% | 2664 fps | 100% |
| SNPE Vectan SP 11ᴾ | <<locked>> | 100% | 48,080 psi | 80% | 2667 fps | 97.6% |
| SNPE Vectan SP 3 | <<locked>> | 88% | 52,518 psi | 87% | 2621 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 94% | 51,401 psi | 85% | 2648 fps | 96.3% |
| SNPE Vectan SP 9 | <<locked>> | 96% | 51,808 psi | 86% | 2677 fps | 98.3% |
| SNPE Vectan Tubal 3000 | <<locked>> | 94% | 51,677 psi | 86% | 2572 fps | 100% |
| SNPE Vectan Tubal 5000ᴾ | <<locked>> | 100% | 50,676 psi | 84% | 2566 fps | 100% |
| Somchem S321 | <<locked>> | 90% | 50,879 psi | 85% | 2657 fps | 99.3% |
| Somchem S335 | <<locked>> | 96% | 53,403 psi | 89% | 2615 fps | 100% |
| Somchem S341 | <<locked>> | 96% | 54,375 psi | 90% | 2697 fps | 98.6% |
| Somchem S355ᴾ | <<locked>> | 100% | 46,833 psi | 78% | 2615 fps | 98% |
| Vihtavuori N120 | <<locked>> | 84% | 53,664 psi | 89% | 2526 fps | 100% |
| Vihtavuori N130 | <<locked>> | 90% | 51,750 psi | 86% | 2556 fps | 100% |
| Vihtavuori N133 | <<locked>> | 94% | 51,343 psi | 85% | 2566 fps | 100% |
| Vihtavuori N135ᴾ | <<locked>> | 100% | 53,867 psi | 89% | 2671 fps | 100% |
| Vihtavuori N140 | <<locked>> | 98% | 52,736 psi | 88% | 2648 fps | 100% |
| Vihtavuori N150ᴾ | <<locked>> | 100% | 45,165 psi | 75% | 2556 fps | 98.8% |
| Vihtavuori N530 | <<locked>> | 94% | 53,635 psi | 89% | 2671 fps | 99.4% |
| Vihtavuori N540ᴾ | <<locked>> | 100% | 54,331 psi | 90% | 2690 fps | 100% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 41,669 psi | 69% | 2490 fps | 96.4% |
| Winchester 748 | <<locked>> | 94% | 52,243 psi | 87% | 2713 fps | 99.7% |
| Winchester StaBALL Match | <<locked>> | 96% | 51,256 psi | 85% | 2687 fps | 98.8% |
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% | 34,751 psi | 58% | 2323 fps | 99.7% |
| Accurate 2200 | <<locked>> | 80% | 45,687 psi | 76% | 2562 fps | 96.3% |
| Accurate 2230 | <<locked>> | 80% | 45,571 psi | 76% | 2569 fps | 96.8% |
| Accurate 2460 | <<locked>> | 80% | 37,623 psi | 63% | 2408 fps | 98.6% |
| Accurate 2495 | <<locked>> | 80% | 26,832 psi | 45% | 2208 fps | 98.6% |
| Accurate 2520 | <<locked>> | 80% | 32,909 psi | 55% | 2346 fps | 97.1% |
| Accurate 4064 | <<locked>> | 80% | 25,454 psi | 42% | 2182 fps | 95.4% |
| Accurate LT-30 | <<locked>> | 80% | 43,947 psi | 73% | 2421 fps | 99.9% |
| Accurate LT-32 | <<locked>> | 80% | 44,309 psi | 74% | 2434 fps | 99.3% |
| ADI AR 2206H | <<locked>> | 86% | 38,928 psi | 65% | 2454 fps | 95.5% |
| ADI AR 2207 | <<locked>> | 80% | 47,195 psi | 78% | 2487 fps | 100% |
| ADI AR 2208 | <<locked>> | 94% | 42,511 psi | 71% | 2503 fps | 95.7% |
| ADI AR 2219 | <<locked>> | 80% | 42,279 psi | 70% | 2507 fps | 99.9% |
| ADI Benchmark 8208 | <<locked>> | 80% | 33,939 psi | 56% | 2326 fps | 95.3% |
| Alliant AR-Comp | <<locked>> | 80% | 32,068 psi | 53% | 2346 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 38,696 psi | 64% | 2500 fps | 96.3% |
| Alliant Power Pro 2000-MR | 45 gr | 92% | 43,279 psi | 72% | 2621 fps | 95.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 33,649 psi | 56% | 2372 fps | 95% |
| Alliant Reloder-10x | <<locked>> | 80% | 40,161 psi | 67% | 2431 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 90% | 39,059 psi | 65% | 2480 fps | 95% |
| Alliant Reloder-17 | <<locked>> | 96% | 38,319 psi | 64% | 2526 fps | 95.3% |
| Alliant Reloder-7 | <<locked>> | 80% | 48,153 psi | 80% | 2500 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 42,293 psi | 70% | 2411 fps | 99.9% |
| Baschieri & Pellagri 107 | <<locked>> | 90% | 43,540 psi | 72% | 2559 fps | 95.5% |
| Bofors RP3 | <<locked>> | 90% | 34,925 psi | 58% | 2415 fps | 95.6% |
| Hodgdon Benchmark | <<locked>> | 80% | 36,419 psi | 61% | 2339 fps | 96.8% |
| Hodgdon BL-C2 | <<locked>> | 80% | 31,357 psi | 52% | 2326 fps | 95.2% |
| Hodgdon CFE223 | 42.1 gr | 84% | 40,364 psi | 67% | 2556 fps | 95.2% |
| Hodgdon H322 | <<locked>> | 80% | 38,696 psi | 64% | 2441 fps | 99.5% |
| Hodgdon H335 | <<locked>> | 80% | 39,276 psi | 65% | 2461 fps | 99.1% |
| Hodgdon H380 | <<locked>> | 96% | 44,831 psi | 74% | 2575 fps | 95% |
| Hodgdon H4198 | <<locked>> | 80% | 48,457 psi | 81% | 2507 fps | 100% |
| Hodgdon H4895 | <<locked>> | 84% | 36,724 psi | 61% | 2418 fps | 95.6% |
| Hodgdon LEVERevolution | <<locked>> | 86% | 35,056 psi | 58% | 2428 fps | 95.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 24,816 psi | 41% | 1417 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 35,752 psi | 59% | 2379 fps | 95% |
| IMR 3031 | <<locked>> | 80% | 30,705 psi | 51% | 2329 fps | 98.7% |
| IMR 4064 | <<locked>> | 90% | 39,349 psi | 65% | 2438 fps | 95% |
| IMR 4198 | <<locked>> | 80% | 41,278 psi | 69% | 2408 fps | 100% |
| IMR 4895 | <<locked>> | 88% | 37,449 psi | 62% | 2461 fps | 95.2% |
| IMR 8208 XBR | <<locked>> | 80% | 33,939 psi | 56% | 2326 fps | 95.3% |
| Lovex D073.4 | <<locked>> | 80% | 46,195 psi | 77% | 2562 fps | 99.5% |
| Lovex D073.5 | <<locked>> | 80% | 37,275 psi | 62% | 2402 fps | 97.5% |
| Lovex D073.6 | <<locked>> | 80% | 29,660 psi | 49% | 2280 fps | 95.9% |
| Lovex S060 | <<locked>> | 84% | 37,840 psi | 63% | 2362 fps | 95.2% |
| Lovex S062 | <<locked>> | 86% | 33,852 psi | 56% | 2343 fps | 95.5% |
| Norma 200 | <<locked>> | 80% | 44,962 psi | 75% | 2490 fps | 100% |
| Norma 201 | <<locked>> | 82% | 33,257 psi | 55% | 2313 fps | 95.3% |
| Norma 202 | <<locked>> | 80% | 31,111 psi | 52% | 2287 fps | 97.2% |
| Norma 203B | <<locked>> | 90% | 38,261 psi | 64% | 2470 fps | 95.4% |
| Ramshot Big Game | <<locked>> | 92% | 40,973 psi | 68% | 2536 fps | 95.8% |
| Ramshot TAC | <<locked>> | 92% | 50,792 psi | 84% | 2628 fps | 95.6% |
| Ramshot Wild Boar | <<locked>> | 86% | 40,089 psi | 67% | 2487 fps | 95.8% |
| Ramshot X-Terminator | <<locked>> | 82% | 39,682 psi | 66% | 2421 fps | 95.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 24,743 psi | 41% | 1450 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 38,464 psi | 64% | 2421 fps | 98.1% |
| ReloadSwiss RS 52 | 42.7 gr | 90% | 40,712 psi | 68% | 2575 fps | 95.4% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 31,691 psi | 53% | 2379 fps | 95.2% |
| Rottweil R 901 | <<locked>> | 80% | 34,563 psi | 57% | 2329 fps | 97.9% |
| Rottweil R 902 | <<locked>> | 84% | 33,750 psi | 56% | 2316 fps | 95.4% |
| Rottweil R 903 | <<locked>> | 92% | 34,853 psi | 58% | 2405 fps | 95.2% |
| Shooters World AR Plus | <<locked>> | 80% | 46,195 psi | 77% | 2562 fps | 99.5% |
| Shooters World Match Rifle | <<locked>> | 80% | 29,660 psi | 49% | 2280 fps | 95.9% |
| Shooters World Precision | <<locked>> | 86% | 33,852 psi | 56% | 2343 fps | 95.5% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 40,538 psi | 67% | 2428 fps | 97% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 48,631 psi | 81% | 2270 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 42,931 psi | 71% | 2516 fps | 99.5% |
| SNPE Vectan SP 11 | <<locked>> | 94% | 39,726 psi | 66% | 2516 fps | 95.5% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 40,669 psi | 68% | 2438 fps | 99.9% |
| SNPE Vectan SP 7 | <<locked>> | 92% | 47,834 psi | 79% | 2592 fps | 95.6% |
| SNPE Vectan SP 9 | <<locked>> | 86% | 37,521 psi | 62% | 2425 fps | 95% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 33,228 psi | 55% | 2254 fps | 97.7% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 26,861 psi | 45% | 2123 fps | 96.6% |
| Somchem S321 | <<locked>> | 80% | 35,955 psi | 60% | 2395 fps | 96.4% |
| Somchem S335 | <<locked>> | 80% | 32,561 psi | 54% | 2257 fps | 98.3% |
| Somchem S341 | <<locked>> | 86% | 38,638 psi | 64% | 2441 fps | 95.2% |
| Somchem S355 | <<locked>> | 92% | 36,260 psi | 60% | 2418 fps | 95.3% |
| Vihtavuori N120 | <<locked>> | 80% | 47,224 psi | 78% | 2444 fps | 100% |
| Vihtavuori N130 | <<locked>> | 80% | 37,927 psi | 63% | 2343 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 33,185 psi | 55% | 2267 fps | 99.5% |
| Vihtavuori N135 | <<locked>> | 80% | 28,079 psi | 47% | 2224 fps | 98.8% |
| Vihtavuori N140 | <<locked>> | 80% | 29,385 psi | 49% | 2228 fps | 96.9% |
| Vihtavuori N150 | <<locked>> | 90% | 32,532 psi | 54% | 2316 fps | 95.6% |
| Vihtavuori N530 | <<locked>> | 80% | 33,620 psi | 56% | 2316 fps | 95.4% |
| Vihtavuori N540 | <<locked>> | 80% | 28,123 psi | 47% | 2208 fps | 95.8% |
| Winchester 6.5 StaBALL | <<locked>> | 98% | 38,943 psi | 65% | 2438 fps | 95.6% |
| Winchester 748 | <<locked>> | 80% | 32,489 psi | 54% | 2352 fps | 95.9% |
| Winchester StaBALL Match | <<locked>> | 86% | 36,332 psi | 60% | 2421 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 88 powders for .308 Win. Ackley Improved loaded with the .308 | 165gr | Geco STAR. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,795 fps; across all powders the maximum-charge window runs from 1,588 fps to 2,795 fps. Accurate 2495 gives the best case fill at 100 %, and 88 of the 88 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (415 MPa), the top charges use 56–90 %, leaving at least 10 % headroom. The 165.0 gr projectile in 0.308" calls for a 1:13.0 twist; slower twists will usually not stabilise this weight. Accurate 2495, Accurate 4064, ADI AR 2208 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 STAR 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.