Load Specifications
Load data in caliber .308 Win. Ackley Improved with .308 | 155gr | Frontier RSBT bullet and 86 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.
A valid access license is required to use the Personalized Load Calculator.
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% | 52,620 psi | 87% | 2598 fps | 100% |
| Accurate 2015 | <<locked>> | 94% | 51,387 psi | 85% | 2661 fps | 100% |
| Accurate 2200 | <<locked>> | 86% | 52,605 psi | 87% | 2733 fps | 96.8% |
| Accurate 2230 | <<locked>> | 86% | 53,069 psi | 88% | 2743 fps | 97.2% |
| Accurate 2460 | <<locked>> | 92% | 53,432 psi | 89% | 2723 fps | 99.8% |
| Accurate 2495ᴾ | <<locked>> | 100% | 49,792 psi | 83% | 2700 fps | 100% |
| Accurate 2520 | <<locked>> | 96% | 54,302 psi | 90% | 2776 fps | 99.8% |
| Accurate 4064ᴾ | <<locked>> | 100% | 46,180 psi | 77% | 2677 fps | 99.7% |
| Accurate LT-30 | <<locked>> | 88% | 53,461 psi | 89% | 2621 fps | 100% |
| Accurate LT-32 | <<locked>> | 88% | 53,867 psi | 89% | 2638 fps | 99.7% |
| ADI AR 2206H | <<locked>> | 98% | 53,577 psi | 89% | 2766 fps | 97.8% |
| ADI AR 2207 | <<locked>> | 86% | 54,215 psi | 90% | 2651 fps | 100% |
| ADI AR 2208ᴾ | <<locked>> | 100% | 48,225 psi | 80% | 2654 fps | 95.9% |
| ADI AR 2219 | <<locked>> | 88% | 52,315 psi | 87% | 2726 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 96% | 53,359 psi | 89% | 2733 fps | 98.8% |
| Alliant AR-Comp | <<locked>> | 96% | 51,082 psi | 85% | 2730 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 92% | 54,128 psi | 90% | 2831 fps | 98.6% |
| Alliant Power Pro 2000-MRᴾ | <<locked>> | 100% | 53,374 psi | 89% | 2848 fps | 96.6% |
| Alliant Power Pro Varmint | <<locked>> | 98% | 54,099 psi | 90% | 2779 fps | 98.4% |
| Alliant Reloder- TS 15.5ᴾ | <<locked>> | 100% | 46,253 psi | 77% | 2674 fps | 97.5% |
| Alliant Reloder-10x | <<locked>> | 90% | 51,880 psi | 86% | 2677 fps | 100% |
| Alliant Reloder-15ᴾ | <<locked>> | 100% | 50,589 psi | 84% | 2740 fps | 96.8% |
| Alliant Reloder-7 | <<locked>> | 84% | 52,344 psi | 87% | 2625 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 88% | 51,924 psi | 86% | 2615 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 98% | 53,214 psi | 88% | 2772 fps | 96.6% |
| Bofors RP3ᴾ | <<locked>> | 100% | 45,876 psi | 76% | 2680 fps | 97.5% |
| Hodgdon Benchmark | <<locked>> | 94% | 53,084 psi | 88% | 2684 fps | 99.1% |
| Hodgdon BL-C2 | <<locked>> | 96% | 51,213 psi | 85% | 2756 fps | 99% |
| Hodgdon CFE223 | <<locked>> | 94% | 53,229 psi | 88% | 2838 fps | 97.3% |
| Hodgdon H322 | <<locked>> | 92% | 54,230 psi | 90% | 2753 fps | 100% |
| Hodgdon H335 | <<locked>> | 90% | 51,924 psi | 86% | 2730 fps | 99.9% |
| Hodgdon H4198 | <<locked>> | 84% | 52,272 psi | 87% | 2621 fps | 100% |
| Hodgdon H4895 | <<locked>> | 98% | 53,896 psi | 90% | 2779 fps | 98.4% |
| Hodgdon LEVERevolutionᴾ | <<locked>> | 100% | 51,982 psi | 86% | 2799 fps | 98.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 33,272 psi | 55% | 1617 fps | 100% |
| Hodgdon VARGET | <<locked>> | 98% | 52,605 psi | 87% | 2736 fps | 98.1% |
| IMR 3031 | <<locked>> | 98% | 51,721 psi | 86% | 2776 fps | 100% |
| IMR 4064ᴾ | <<locked>> | 100% | 50,749 psi | 84% | 2690 fps | 96.8% |
| IMR 4198 | <<locked>> | 90% | 52,852 psi | 88% | 2644 fps | 100% |
| IMR 4895ᴾ | <<locked>> | 100% | 51,706 psi | 86% | 2772 fps | 97.7% |
| IMR 8208 XBR | <<locked>> | 96% | 53,359 psi | 89% | 2733 fps | 98.8% |
| Lovex D073.4 | <<locked>> | 86% | 53,766 psi | 89% | 2736 fps | 99.7% |
| Lovex D073.5 | <<locked>> | 92% | 53,301 psi | 89% | 2726 fps | 99.3% |
| Lovex D073.6 | <<locked>> | 98% | 51,372 psi | 85% | 2746 fps | 99.6% |
| Lovex S053 | <<locked>> | 82% | 54,099 psi | 90% | 2552 fps | 100% |
| Lovex S060 | <<locked>> | 96% | 51,895 psi | 86% | 2661 fps | 97.5% |
| Lovex S062ᴾ | <<locked>> | 100% | 49,559 psi | 82% | 2690 fps | 98.4% |
| Norma 200 | <<locked>> | 86% | 51,837 psi | 86% | 2654 fps | 100% |
| Norma 201 | <<locked>> | 98% | 52,446 psi | 87% | 2720 fps | 98.7% |
| Norma 202 | <<locked>> | 98% | 52,388 psi | 87% | 2733 fps | 99.9% |
| Norma 203Bᴾ | <<locked>> | 100% | 49,574 psi | 82% | 2730 fps | 97.2% |
| Ramshot Big Gameᴾ | <<locked>> | 100% | 50,183 psi | 83% | 2749 fps | 96.9% |
| Ramshot Wild Boar | <<locked>> | 96% | 52,910 psi | 88% | 2762 fps | 97.6% |
| Ramshot X-Terminator | <<locked>> | 92% | 52,098 psi | 87% | 2687 fps | 97.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 33,359 psi | 55% | 1657 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 92% | 53,417 psi | 89% | 2730 fps | 99.6% |
| ReloadSwiss RS 52ᴾ | <<locked>> | 100% | 53,359 psi | 89% | 2851 fps | 97.3% |
| ReloadSwiss RS 60ᴾ | <<locked>> | 100% | 44,309 psi | 74% | 2713 fps | 98.4% |
| Rottweil R 901 | <<locked>> | 96% | 53,505 psi | 89% | 2717 fps | 99.9% |
| Rottweil R 902ᴾ | <<locked>> | 100% | 52,475 psi | 87% | 2710 fps | 98.7% |
| Rottweil R 903ᴾ | <<locked>> | 100% | 42,482 psi | 71% | 2608 fps | 96.3% |
| Shooters World AR Plus | <<locked>> | 86% | 53,766 psi | 89% | 2736 fps | 99.7% |
| Shooters World Match Rifle | <<locked>> | 98% | 51,372 psi | 85% | 2746 fps | 99.6% |
| Shooters World Precisionᴾ | <<locked>> | 100% | 49,559 psi | 82% | 2690 fps | 98.4% |
| Shooters World Tactical Rifle | <<locked>> | 90% | 54,331 psi | 90% | 2703 fps | 98.6% |
| SNPE Vectan BA6 1/2 | <<locked>> | 84% | 52,083 psi | 87% | 2375 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 88% | 52,736 psi | 88% | 2733 fps | 99.9% |
| SNPE Vectan SP 11ᴾ | <<locked>> | 100% | 45,397 psi | 75% | 2674 fps | 95.9% |
| SNPE Vectan SP 3 | <<locked>> | 90% | 52,953 psi | 88% | 2694 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 98% | 51,895 psi | 86% | 2733 fps | 97.5% |
| SNPE Vectan Tubal 3000 | <<locked>> | 96% | 52,272 psi | 87% | 2641 fps | 99.8% |
| SNPE Vectan Tubal 5000ᴾ | <<locked>> | 100% | 47,834 psi | 79% | 2585 fps | 99.9% |
| Somchem S321 | <<locked>> | 92% | 51,314 psi | 85% | 2726 fps | 98.8% |
| Somchem S335 | <<locked>> | 98% | 53,969 psi | 90% | 2684 fps | 100% |
| Somchem S341 | <<locked>> | 96% | 51,126 psi | 85% | 2707 fps | 97.2% |
| Somchem S355ᴾ | <<locked>> | 100% | 43,918 psi | 73% | 2618 fps | 96.4% |
| Vihtavuori N120 | <<locked>> | 86% | 54,201 psi | 90% | 2602 fps | 100% |
| Vihtavuori N130 | <<locked>> | 92% | 52,112 psi | 87% | 2628 fps | 100% |
| Vihtavuori N133 | <<locked>> | 96% | 51,634 psi | 86% | 2635 fps | 100% |
| Vihtavuori N135ᴾ | <<locked>> | 100% | 50,473 psi | 84% | 2697 fps | 100% |
| Vihtavuori N140ᴾ | <<locked>> | 100% | 52,707 psi | 88% | 2710 fps | 100% |
| Vihtavuori N150ᴾ | <<locked>> | 100% | 42,308 psi | 70% | 2562 fps | 97.4% |
| Vihtavuori N530 | <<locked>> | 96% | 54,157 psi | 90% | 2736 fps | 98.9% |
| Vihtavuori N540ᴾ | <<locked>> | 100% | 51,155 psi | 85% | 2707 fps | 99.8% |
| Winchester 748 | <<locked>> | 96% | 52,069 psi | 87% | 2776 fps | 99.3% |
| Winchester StaBALL Match | <<locked>> | 98% | 51,285 psi | 85% | 2743 fps | 98% |
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% | 49,037 psi | 81% | 2549 fps | 100% |
| Accurate 2015 | <<locked>> | 80% | 33,170 psi | 55% | 2343 fps | 99.1% |
| Accurate 2200 | <<locked>> | 82% | 46,209 psi | 77% | 2625 fps | 95.3% |
| Accurate 2230 | <<locked>> | 82% | 46,108 psi | 77% | 2631 fps | 95.8% |
| Accurate 2460 | <<locked>> | 80% | 35,737 psi | 59% | 2421 fps | 97.4% |
| Accurate 2495 | <<locked>> | 80% | 25,744 psi | 43% | 2228 fps | 97.4% |
| Accurate 2520 | <<locked>> | 80% | 31,125 psi | 52% | 2356 fps | 95.4% |
| Accurate 4064 | <<locked>> | 84% | 27,876 psi | 46% | 2297 fps | 95.5% |
| Accurate LT-30 | <<locked>> | 80% | 42,061 psi | 70% | 2444 fps | 99.5% |
| Accurate LT-32 | <<locked>> | 80% | 42,409 psi | 70% | 2454 fps | 98.4% |
| ADI AR 2206H | <<locked>> | 90% | 41,698 psi | 69% | 2562 fps | 95.2% |
| ADI AR 2207 | <<locked>> | 80% | 45,194 psi | 75% | 2526 fps | 100% |
| ADI AR 2208 | <<locked>> | 98% | 45,324 psi | 75% | 2605 fps | 95.2% |
| ADI AR 2219 | <<locked>> | 80% | 40,161 psi | 67% | 2530 fps | 99.3% |
| ADI Benchmark 8208 | <<locked>> | 84% | 36,854 psi | 61% | 2441 fps | 95.2% |
| Alliant AR-Comp | <<locked>> | 80% | 30,414 psi | 51% | 2362 fps | 99.9% |
| Alliant Power Pro 1200-R | 36.6 gr | 82% | 39,233 psi | 65% | 2566 fps | 95.3% |
| Alliant Power Pro 2000-MR | <<locked>> | 98% | 50,053 psi | 83% | 2792 fps | 95.8% |
| Alliant Power Pro Varmint | <<locked>> | 88% | 39,726 psi | 66% | 2533 fps | 95.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 94% | 38,145 psi | 63% | 2523 fps | 95.4% |
| Alliant Reloder-10x | <<locked>> | 80% | 38,218 psi | 63% | 2457 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 96% | 44,527 psi | 74% | 2638 fps | 95.4% |
| Alliant Reloder-7 | <<locked>> | 80% | 46,093 psi | 77% | 2533 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 40,364 psi | 67% | 2434 fps | 99.5% |
| Baschieri & Pellagri 107 | <<locked>> | 94% | 46,673 psi | 78% | 2664 fps | 95.1% |
| Bofors RP3 | <<locked>> | 94% | 37,507 psi | 62% | 2523 fps | 95.3% |
| Hodgdon Benchmark | <<locked>> | 80% | 34,708 psi | 58% | 2349 fps | 95.2% |
| Hodgdon BL-C2 | <<locked>> | 84% | 33,997 psi | 56% | 2438 fps | 95% |
| Hodgdon CFE223 | <<locked>> | 90% | 46,630 psi | 77% | 2726 fps | 95.8% |
| Hodgdon H322 | <<locked>> | 80% | 36,477 psi | 61% | 2457 fps | 98.6% |
| Hodgdon H335 | <<locked>> | 80% | 36,912 psi | 61% | 2467 fps | 97.9% |
| Hodgdon H4198 | <<locked>> | 80% | 46,325 psi | 77% | 2530 fps | 99.7% |
| Hodgdon H4895 | <<locked>> | 88% | 39,566 psi | 66% | 2530 fps | 95.3% |
| Hodgdon LEVERevolution | <<locked>> | 92% | 40,219 psi | 67% | 2589 fps | 95.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 24,613 psi | 41% | 1444 fps | 100% |
| Hodgdon VARGET | <<locked>> | 90% | 40,785 psi | 68% | 2533 fps | 95.5% |
| IMR 3031 | <<locked>> | 80% | 29,182 psi | 48% | 2339 fps | 97.4% |
| IMR 4064 | <<locked>> | 96% | 44,976 psi | 75% | 2595 fps | 95.5% |
| IMR 4198 | <<locked>> | 80% | 39,407 psi | 65% | 2438 fps | 100% |
| IMR 4895 | <<locked>> | 94% | 42,714 psi | 71% | 2621 fps | 95.7% |
| IMR 8208 XBR | <<locked>> | 84% | 36,854 psi | 61% | 2441 fps | 95.2% |
| Lovex D073.4 | <<locked>> | 80% | 43,468 psi | 72% | 2575 fps | 98.5% |
| Lovex D073.5 | <<locked>> | 80% | 35,447 psi | 59% | 2415 fps | 96% |
| Lovex D073.6 | <<locked>> | 84% | 32,010 psi | 53% | 2392 fps | 95.7% |
| Lovex S053 | <<locked>> | 80% | 51,126 psi | 85% | 2513 fps | 100% |
| Lovex S060 | <<locked>> | 90% | 43,482 psi | 72% | 2520 fps | 95.7% |
| Lovex S062 | <<locked>> | 90% | 36,535 psi | 61% | 2454 fps | 95.3% |
| Norma 200 | <<locked>> | 80% | 43,047 psi | 72% | 2523 fps | 100% |
| Norma 201 | <<locked>> | 86% | 36,042 psi | 60% | 2425 fps | 95.1% |
| Norma 202 | <<locked>> | 80% | 29,646 psi | 49% | 2300 fps | 95.6% |
| Norma 203B | <<locked>> | 94% | 40,915 psi | 68% | 2575 fps | 95.1% |
| Ramshot Big Game | <<locked>> | 96% | 43,990 psi | 73% | 2641 fps | 95.4% |
| Ramshot Wild Boar | 42.9 gr | 90% | 43,207 psi | 72% | 2602 fps | 95.5% |
| Ramshot X-Terminator | <<locked>> | 86% | 42,815 psi | 71% | 2533 fps | 95.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 24,816 psi | 41% | 1483 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 36,477 psi | 61% | 2434 fps | 96.7% |
| ReloadSwiss RS 52 | <<locked>> | 94% | 43,584 psi | 72% | 2684 fps | 95% |
| ReloadSwiss RS 60 | <<locked>> | 94% | 36,550 psi | 61% | 2543 fps | 95.9% |
| Rottweil R 901 | <<locked>> | 80% | 33,330 psi | 55% | 2349 fps | 96.6% |
| Rottweil R 902 | <<locked>> | 88% | 36,318 psi | 60% | 2425 fps | 95.1% |
| Rottweil R 903 | <<locked>> | 98% | 39,726 psi | 66% | 2559 fps | 95.6% |
| Shooters World AR Plus | <<locked>> | 80% | 43,468 psi | 72% | 2575 fps | 98.5% |
| Shooters World Match Rifle | <<locked>> | 84% | 32,010 psi | 53% | 2392 fps | 95.7% |
| Shooters World Precision | <<locked>> | 90% | 36,535 psi | 61% | 2454 fps | 95.3% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 38,580 psi | 64% | 2438 fps | 95.3% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 46,804 psi | 78% | 2306 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 40,437 psi | 67% | 2530 fps | 98.5% |
| SNPE Vectan SP 11 | <<locked>> | 98% | 42,322 psi | 70% | 2615 fps | 95% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 38,566 psi | 64% | 2461 fps | 99.5% |
| SNPE Vectan SP 9 | <<locked>> | 92% | 42,975 psi | 71% | 2585 fps | 95.5% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 31,821 psi | 53% | 2270 fps | 96.3% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 27,499 psi | 46% | 2185 fps | 95.8% |
| Somchem S321 | <<locked>> | 82% | 36,651 psi | 61% | 2461 fps | 95.6% |
| Somchem S335 | <<locked>> | 80% | 31,227 psi | 52% | 2277 fps | 97% |
| Somchem S341 | <<locked>> | 92% | 44,672 psi | 74% | 2602 fps | 95.8% |
| Somchem S355 | <<locked>> | 96% | 38,870 psi | 65% | 2523 fps | 95% |
| Vihtavuori N120 | <<locked>> | 80% | 45,252 psi | 75% | 2480 fps | 100% |
| Vihtavuori N130 | <<locked>> | 80% | 36,216 psi | 60% | 2369 fps | 99.8% |
| Vihtavuori N133 | <<locked>> | 80% | 31,604 psi | 53% | 2283 fps | 98.6% |
| Vihtavuori N135 | <<locked>> | 80% | 26,658 psi | 44% | 2238 fps | 97.5% |
| Vihtavuori N140 | <<locked>> | 80% | 28,065 psi | 47% | 2241 fps | 95.2% |
| Vihtavuori N150 | <<locked>> | 94% | 34,998 psi | 58% | 2421 fps | 95.3% |
| Vihtavuori N530 | <<locked>> | 84% | 36,622 psi | 61% | 2434 fps | 95.2% |
| Vihtavuori N540 | <<locked>> | 84% | 30,603 psi | 51% | 2323 fps | 95.7% |
| Winchester 748 | 39.2 gr | 84% | 35,041 psi | 58% | 2461 fps | 95.7% |
| Winchester StaBALL Match | <<locked>> | 90% | 39,189 psi | 65% | 2533 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 97 powders for .308 Win. Ackley Improved loaded with the .308 | 155gr | Frontier RSBT. ReloadSwiss RS 52 delivers the highest muzzle velocity at 2,851 fps; across all powders the maximum-charge window runs from 1,617 fps to 2,851 fps. Accurate 2495 gives the best case fill at 100 %, and 97 of the 97 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (415 MPa), the top charges use 53–90 %, leaving at least 10 % headroom. The 155.0 gr projectile in 0.308" calls for a 1:10.5 twist; slower twists will usually not stabilise this weight. Accurate 2495, Accurate 2700, Accurate 4064 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 | 155gr | Frontier RSBT they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate 2700, Alliant Reloder-17, Hodgdon H380 burn incompletely and react more sensitively to barrel length and temperature. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.