Load Specifications
Load data in caliber .308 Win. Ackley Improved with .308 | 150gr | Swift Scirocco bullet and 83 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Power Pro 1200-R, Winchester 748 and Ramshot Wild Boar.
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 1680 | <<locked>> | 82% | 52,330 psi | 87% | 2648 fps | 100% |
| Accurate 2015 | <<locked>> | 96% | 54,186 psi | 90% | 2749 fps | 100% |
| Accurate 2200 | <<locked>> | 86% | 52,605 psi | 87% | 2782 fps | 96.5% |
| Accurate 2230 | <<locked>> | 86% | 52,750 psi | 88% | 2789 fps | 96.9% |
| Accurate 2460 | <<locked>> | 92% | 53,011 psi | 88% | 2769 fps | 99.8% |
| Accurate 2495ᴾ | <<locked>> | 100% | 49,676 psi | 83% | 2749 fps | 100% |
| Accurate 2520 | <<locked>> | 96% | 53,737 psi | 89% | 2818 fps | 99.7% |
| Accurate 4064ᴾ | <<locked>> | 100% | 46,151 psi | 77% | 2726 fps | 99.6% |
| Accurate LT-30 | <<locked>> | 88% | 53,185 psi | 88% | 2667 fps | 100% |
| Accurate LT-32 | <<locked>> | 88% | 53,592 psi | 89% | 2684 fps | 99.6% |
| ADI AR 2206H | <<locked>> | 98% | 53,171 psi | 88% | 2808 fps | 97.6% |
| ADI AR 2207 | <<locked>> | 86% | 53,664 psi | 89% | 2697 fps | 100% |
| ADI AR 2219 | <<locked>> | 88% | 52,127 psi | 87% | 2779 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 96% | 53,011 psi | 88% | 2779 fps | 98.6% |
| Alliant AR-Comp | <<locked>> | 98% | 54,375 psi | 90% | 2825 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 92% | 53,940 psi | 90% | 2881 fps | 98.3% |
| Alliant Power Pro 2000-MRᴾ | <<locked>> | 100% | 53,040 psi | 88% | 2894 fps | 96.2% |
| Alliant Reloder- TS 15.5ᴾ | <<locked>> | 100% | 45,876 psi | 76% | 2717 fps | 97.2% |
| Alliant Reloder-10x | <<locked>> | 90% | 51,547 psi | 86% | 2726 fps | 100% |
| Alliant Reloder-15ᴾ | <<locked>> | 100% | 50,430 psi | 84% | 2789 fps | 96.5% |
| Alliant Reloder-7 | <<locked>> | 84% | 51,822 psi | 86% | 2671 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 88% | 51,692 psi | 86% | 2664 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 98% | 52,924 psi | 88% | 2815 fps | 96.3% |
| Bofors RP3ᴾ | <<locked>> | 100% | 45,745 psi | 76% | 2723 fps | 97.2% |
| Hodgdon Benchmark | <<locked>> | 94% | 52,881 psi | 88% | 2730 fps | 99% |
| Hodgdon BL-C2 | <<locked>> | 96% | 50,981 psi | 85% | 2802 fps | 98.8% |
| Hodgdon CFE223 | <<locked>> | 94% | 53,069 psi | 88% | 2884 fps | 97% |
| Hodgdon H322 | <<locked>> | 92% | 54,012 psi | 90% | 2805 fps | 100% |
| Hodgdon H335 | <<locked>> | 90% | 51,561 psi | 86% | 2776 fps | 99.8% |
| Hodgdon H4198 | <<locked>> | 84% | 52,127 psi | 87% | 2671 fps | 99.9% |
| Hodgdon H4895 | <<locked>> | 98% | 53,476 psi | 89% | 2822 fps | 98.2% |
| Hodgdon LEVERevolutionᴾ | <<locked>> | 100% | 51,735 psi | 86% | 2844 fps | 98.3% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 33,446 psi | 56% | 1657 fps | 100% |
| Hodgdon VARGET | <<locked>> | 98% | 52,185 psi | 87% | 2779 fps | 97.8% |
| IMR 3031 | <<locked>> | 98% | 51,387 psi | 85% | 2825 fps | 100% |
| IMR 4064ᴾ | <<locked>> | 100% | 50,401 psi | 84% | 2733 fps | 96.5% |
| IMR 4198 | <<locked>> | 90% | 52,692 psi | 88% | 2697 fps | 100% |
| IMR 4895ᴾ | <<locked>> | 100% | 51,619 psi | 86% | 2825 fps | 97.4% |
| IMR 8208 XBR | <<locked>> | 96% | 53,011 psi | 88% | 2779 fps | 98.6% |
| Lovex D073.4 | <<locked>> | 86% | 53,548 psi | 89% | 2785 fps | 99.6% |
| Lovex D073.5 | <<locked>> | 92% | 53,229 psi | 88% | 2776 fps | 99.2% |
| Lovex D073.6 | <<locked>> | 98% | 51,140 psi | 85% | 2792 fps | 99.5% |
| Lovex S053 | <<locked>> | 82% | 53,838 psi | 89% | 2602 fps | 100% |
| Lovex S060 | <<locked>> | 96% | 51,416 psi | 85% | 2703 fps | 97.2% |
| Lovex S062ᴾ | <<locked>> | 100% | 49,197 psi | 82% | 2736 fps | 98.1% |
| Norma 200 | <<locked>> | 86% | 51,547 psi | 86% | 2703 fps | 100% |
| Norma 201 | <<locked>> | 98% | 52,098 psi | 87% | 2766 fps | 98.5% |
| Norma 202 | <<locked>> | 98% | 51,996 psi | 86% | 2779 fps | 99.8% |
| Norma 203Bᴾ | <<locked>> | 100% | 49,501 psi | 82% | 2779 fps | 97% |
| Ramshot Big Gameᴾ | <<locked>> | 100% | 49,908 psi | 83% | 2792 fps | 96.6% |
| Ramshot Wild Boar | <<locked>> | 96% | 52,315 psi | 87% | 2802 fps | 97.3% |
| Ramshot X-Terminator | <<locked>> | 92% | 51,706 psi | 86% | 2733 fps | 97% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 33,228 psi | 55% | 1693 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 92% | 53,185 psi | 88% | 2779 fps | 99.5% |
| ReloadSwiss RS 52ᴾ | <<locked>> | 100% | 52,736 psi | 88% | 2890 fps | 96.9% |
| ReloadSwiss RS 60ᴾ | <<locked>> | 100% | 44,106 psi | 73% | 2756 fps | 98.1% |
| Rottweil R 901 | <<locked>> | 96% | 53,359 psi | 89% | 2766 fps | 99.8% |
| Rottweil R 902ᴾ | <<locked>> | 100% | 52,098 psi | 87% | 2756 fps | 98.5% |
| Rottweil R 903ᴾ | <<locked>> | 100% | 42,380 psi | 70% | 2654 fps | 96% |
| Shooters World AR Plus | <<locked>> | 86% | 53,548 psi | 89% | 2785 fps | 99.6% |
| Shooters World Match Rifle | <<locked>> | 98% | 51,140 psi | 85% | 2792 fps | 99.5% |
| Shooters World Precisionᴾ | <<locked>> | 100% | 49,197 psi | 82% | 2736 fps | 98.1% |
| Shooters World Tactical Rifle | <<locked>> | 90% | 54,070 psi | 90% | 2749 fps | 98.4% |
| SNPE Vectan BA6 1/2 | <<locked>> | 84% | 51,605 psi | 86% | 2421 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 88% | 52,446 psi | 87% | 2782 fps | 99.8% |
| SNPE Vectan SP 3 | <<locked>> | 90% | 52,591 psi | 87% | 2743 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 98% | 51,779 psi | 86% | 2782 fps | 97.3% |
| SNPE Vectan Tubal 3000 | <<locked>> | 96% | 52,112 psi | 87% | 2687 fps | 99.7% |
| SNPE Vectan Tubal 5000ᴾ | <<locked>> | 100% | 47,587 psi | 79% | 2631 fps | 99.8% |
| Somchem S321 | <<locked>> | 92% | 50,908 psi | 85% | 2769 fps | 98.6% |
| Somchem S335 | <<locked>> | 98% | 53,708 psi | 89% | 2730 fps | 100% |
| Somchem S341 | <<locked>> | 98% | 54,215 psi | 90% | 2802 fps | 97.5% |
| Somchem S355ᴾ | <<locked>> | 100% | 43,874 psi | 73% | 2667 fps | 96.2% |
| Vihtavuori N120 | <<locked>> | 86% | 53,664 psi | 89% | 2648 fps | 100% |
| Vihtavuori N130 | <<locked>> | 92% | 51,735 psi | 86% | 2674 fps | 100% |
| Vihtavuori N133 | <<locked>> | 98% | 54,447 psi | 90% | 2723 fps | 100% |
| Vihtavuori N135ᴾ | <<locked>> | 100% | 50,154 psi | 83% | 2743 fps | 100% |
| Vihtavuori N140ᴾ | <<locked>> | 100% | 52,634 psi | 87% | 2762 fps | 99.9% |
| Vihtavuori N150ᴾ | <<locked>> | 100% | 42,221 psi | 70% | 2608 fps | 97.2% |
| Vihtavuori N530 | <<locked>> | 96% | 53,780 psi | 89% | 2782 fps | 98.7% |
| Vihtavuori N540ᴾ | <<locked>> | 100% | 50,937 psi | 85% | 2756 fps | 99.7% |
| Winchester 748 | <<locked>> | 96% | 51,924 psi | 86% | 2825 fps | 99.2% |
| Winchester StaBALL Matchᴾ | <<locked>> | 100% | 54,360 psi | 90% | 2841 fps | 98.3% |
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 1680 | <<locked>> | 80% | 48,834 psi | 81% | 2598 fps | 100% |
| Accurate 2015 | <<locked>> | 80% | 33,141 psi | 55% | 2388 fps | 98.9% |
| Accurate 2200 | <<locked>> | 82% | 45,919 psi | 76% | 2671 fps | 95% |
| Accurate 2230 | <<locked>> | 82% | 45,716 psi | 76% | 2674 fps | 95.4% |
| Accurate 2460 | <<locked>> | 80% | 35,505 psi | 59% | 2461 fps | 97.1% |
| Accurate 2495 | <<locked>> | 80% | 25,599 psi | 43% | 2267 fps | 97% |
| Accurate 2520 | <<locked>> | 80% | 30,893 psi | 51% | 2392 fps | 95% |
| Accurate 4064 | <<locked>> | 86% | 29,312 psi | 49% | 2379 fps | 95.8% |
| Accurate LT-30 | <<locked>> | 80% | 41,742 psi | 69% | 2487 fps | 99.4% |
| Accurate LT-32 | <<locked>> | 80% | 42,105 psi | 70% | 2497 fps | 98.2% |
| ADI AR 2206H | <<locked>> | 92% | 44,222 psi | 73% | 2657 fps | 95.6% |
| ADI AR 2207 | <<locked>> | 80% | 44,860 psi | 75% | 2572 fps | 100% |
| ADI AR 2219 | <<locked>> | 80% | 39,653 psi | 66% | 2569 fps | 99% |
| ADI Benchmark 8208 | <<locked>> | 86% | 38,972 psi | 65% | 2530 fps | 95.6% |
| Alliant AR-Comp | <<locked>> | 80% | 30,371 psi | 50% | 2405 fps | 99.9% |
| Alliant Power Pro 1200-R | 37.4 gr | 82% | 38,986 psi | 65% | 2608 fps | 95% |
| Alliant Power Pro 2000-MR | <<locked>> | 98% | 49,792 psi | 83% | 2835 fps | 95.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 94% | 37,927 psi | 63% | 2562 fps | 95% |
| Alliant Reloder-10x | <<locked>> | 80% | 37,956 psi | 63% | 2500 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 96% | 44,208 psi | 73% | 2680 fps | 95% |
| Alliant Reloder-7 | <<locked>> | 80% | 46,021 psi | 76% | 2582 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 40,103 psi | 67% | 2477 fps | 99.4% |
| Baschieri & Pellagri 107 | <<locked>> | 96% | 49,821 psi | 83% | 2766 fps | 95.6% |
| Bofors RP3 | <<locked>> | 96% | 39,798 psi | 66% | 2615 fps | 95.7% |
| Hodgdon Benchmark | <<locked>> | 82% | 36,840 psi | 61% | 2441 fps | 95.6% |
| Hodgdon BL-C2 | <<locked>> | 86% | 36,100 psi | 60% | 2533 fps | 95.5% |
| Hodgdon CFE223 | <<locked>> | 90% | 46,253 psi | 77% | 2769 fps | 95.4% |
| Hodgdon H322 | <<locked>> | 80% | 36,361 psi | 60% | 2500 fps | 98.4% |
| Hodgdon H335 | <<locked>> | 80% | 36,695 psi | 61% | 2510 fps | 97.6% |
| Hodgdon H4198 | <<locked>> | 80% | 46,006 psi | 76% | 2575 fps | 99.6% |
| Hodgdon H4895 | <<locked>> | 90% | 41,756 psi | 69% | 2621 fps | 95.7% |
| Hodgdon LEVERevolution | <<locked>> | 92% | 39,929 psi | 66% | 2628 fps | 95.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 24,671 psi | 41% | 1480 fps | 100% |
| Hodgdon VARGET | <<locked>> | 90% | 40,698 psi | 68% | 2579 fps | 95.2% |
| IMR 3031 | <<locked>> | 80% | 28,877 psi | 48% | 2375 fps | 97% |
| IMR 4064 | <<locked>> | 96% | 44,788 psi | 74% | 2638 fps | 95.1% |
| IMR 4198 | <<locked>> | 80% | 39,247 psi | 65% | 2484 fps | 100% |
| IMR 4895 | <<locked>> | 94% | 42,409 psi | 70% | 2661 fps | 95.3% |
| IMR 8208 XBR | <<locked>> | 86% | 38,972 psi | 65% | 2530 fps | 95.6% |
| Lovex D073.4 | <<locked>> | 80% | 43,482 psi | 72% | 2621 fps | 98.3% |
| Lovex D073.5 | <<locked>> | 80% | 35,201 psi | 58% | 2454 fps | 95.6% |
| Lovex D073.6 | <<locked>> | 84% | 31,720 psi | 53% | 2425 fps | 95.3% |
| Lovex S053 | <<locked>> | 80% | 50,894 psi | 85% | 2562 fps | 100% |
| Lovex S060 | <<locked>> | 90% | 43,149 psi | 72% | 2562 fps | 95.3% |
| Lovex S062 | <<locked>> | 92% | 38,551 psi | 64% | 2543 fps | 95.7% |
| Norma 200 | <<locked>> | 80% | 42,975 psi | 71% | 2569 fps | 100% |
| Norma 201 | <<locked>> | 88% | 38,159 psi | 63% | 2516 fps | 95.5% |
| Norma 202 | <<locked>> | 80% | 29,559 psi | 49% | 2339 fps | 95.2% |
| Norma 203B | <<locked>> | 96% | 43,323 psi | 72% | 2667 fps | 95.5% |
| Ramshot Big Game | <<locked>> | 96% | 43,845 psi | 73% | 2684 fps | 95% |
| Ramshot Wild Boar | 43.8 gr | 90% | 42,931 psi | 71% | 2641 fps | 95.2% |
| Ramshot X-Terminator | <<locked>> | 88% | 45,614 psi | 76% | 2631 fps | 95.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 24,598 psi | 41% | 1512 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 36,318 psi | 60% | 2474 fps | 96.4% |
| ReloadSwiss RS 52 | <<locked>> | 96% | 46,456 psi | 77% | 2785 fps | 95.5% |
| ReloadSwiss RS 60 | <<locked>> | 94% | 36,245 psi | 60% | 2579 fps | 95.4% |
| Rottweil R 901 | <<locked>> | 80% | 33,054 psi | 55% | 2385 fps | 96.2% |
| Rottweil R 902 | <<locked>> | 90% | 38,392 psi | 64% | 2513 fps | 95.5% |
| Rottweil R 903 | <<locked>> | 98% | 39,682 psi | 66% | 2605 fps | 95.3% |
| Shooters World AR Plus | <<locked>> | 80% | 43,482 psi | 72% | 2621 fps | 98.3% |
| Shooters World Match Rifle | <<locked>> | 84% | 31,720 psi | 53% | 2425 fps | 95.3% |
| Shooters World Precision | <<locked>> | 92% | 38,551 psi | 64% | 2543 fps | 95.7% |
| Shooters World Tactical Rifle | <<locked>> | 82% | 41,118 psi | 68% | 2536 fps | 95.8% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 46,470 psi | 77% | 2352 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 40,190 psi | 67% | 2572 fps | 98.3% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 38,508 psi | 64% | 2507 fps | 99.4% |
| SNPE Vectan SP 9 | <<locked>> | 92% | 42,801 psi | 71% | 2628 fps | 95.2% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 31,807 psi | 53% | 2313 fps | 96% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 27,282 psi | 45% | 2218 fps | 95.3% |
| Somchem S321 | <<locked>> | 82% | 36,361 psi | 60% | 2500 fps | 95.2% |
| Somchem S335 | <<locked>> | 80% | 31,169 psi | 52% | 2316 fps | 96.8% |
| Somchem S341 | <<locked>> | 92% | 44,338 psi | 74% | 2641 fps | 95.4% |
| Somchem S355 | <<locked>> | 98% | 41,133 psi | 68% | 2615 fps | 95.4% |
| Vihtavuori N120 | <<locked>> | 80% | 44,933 psi | 75% | 2526 fps | 100% |
| Vihtavuori N130 | <<locked>> | 80% | 36,216 psi | 60% | 2415 fps | 99.8% |
| Vihtavuori N133 | <<locked>> | 80% | 31,604 psi | 53% | 2326 fps | 98.5% |
| Vihtavuori N135 | <<locked>> | 80% | 26,614 psi | 44% | 2280 fps | 97.2% |
| Vihtavuori N140 | <<locked>> | 82% | 29,820 psi | 50% | 2329 fps | 95.7% |
| Vihtavuori N150 | <<locked>> | 96% | 37,115 psi | 62% | 2510 fps | 95.7% |
| Vihtavuori N530 | <<locked>> | 86% | 38,812 psi | 64% | 2523 fps | 95.7% |
| Vihtavuori N540 | <<locked>> | 84% | 30,385 psi | 50% | 2359 fps | 95.3% |
| Winchester 748 | 40.1 gr | 84% | 34,983 psi | 58% | 2503 fps | 95.3% |
| Winchester StaBALL Match | <<locked>> | 92% | 41,756 psi | 69% | 2628 fps | 95.6% |
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 83 powders for .308 Win. Ackley Improved loaded with the .308 | 150gr | Swift Scirocco. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,894 fps; across all powders the maximum-charge window runs from 1,657 fps to 2,894 fps. Accurate 2495 gives the best case fill at 100 %, and 83 of the 83 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (415 MPa), the top charges use 55–90 %, leaving at least 10 % headroom. The 150.0 gr projectile in 0.308" calls for a 1:12.0 twist; slower twists will usually not stabilise this weight. Accurate 2495, Accurate 4064, Alliant Power Pro 2000-MR 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 1200-R, Winchester 748, Ramshot Wild Boar rank at the top here: for .308 Win. Ackley Improved with the .308 | 150gr | Swift Scirocco 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.