Load Specifications
Load data in caliber .308 Win. Ackley Improved with .311 | 155gr | Frontier FBSP bullet and 84 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 Hodgdon BL-C2.
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% | 52,214 psi | 87% | 2592 fps | 100% |
| Accurate 2015 | <<locked>> | 96% | 54,375 psi | 90% | 2697 fps | 100% |
| Accurate 2200 | <<locked>> | 86% | 52,605 psi | 87% | 2730 fps | 96.7% |
| Accurate 2230 | <<locked>> | 86% | 53,026 psi | 88% | 2740 fps | 97.2% |
| Accurate 2460 | <<locked>> | 92% | 52,997 psi | 88% | 2713 fps | 99.8% |
| Accurate 2495ᴾ | <<locked>> | 100% | 49,748 psi | 83% | 2697 fps | 100% |
| Accurate 2520 | <<locked>> | 96% | 53,940 psi | 90% | 2766 fps | 99.8% |
| Accurate 4064ᴾ | <<locked>> | 100% | 46,122 psi | 77% | 2674 fps | 99.7% |
| Accurate LT-30 | <<locked>> | 88% | 53,388 psi | 89% | 2618 fps | 100% |
| Accurate LT-32 | <<locked>> | 88% | 53,838 psi | 89% | 2631 fps | 99.7% |
| ADI AR 2206H | <<locked>> | 98% | 53,563 psi | 89% | 2762 fps | 97.8% |
| ADI AR 2207 | <<locked>> | 86% | 53,722 psi | 89% | 2641 fps | 100% |
| ADI AR 2208ᴾ | <<locked>> | 100% | 48,254 psi | 80% | 2651 fps | 95.9% |
| ADI AR 2219 | <<locked>> | 88% | 52,257 psi | 87% | 2723 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 96% | 53,301 psi | 89% | 2726 fps | 98.7% |
| Alliant AR-Comp | <<locked>> | 98% | 54,317 psi | 90% | 2766 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 92% | 54,056 psi | 90% | 2828 fps | 98.5% |
| Alliant Power Pro 2000-MRᴾ | <<locked>> | 100% | 53,374 psi | 89% | 2844 fps | 96.5% |
| Alliant Reloder- TS 15.5ᴾ | <<locked>> | 100% | 45,890 psi | 76% | 2664 fps | 97.3% |
| Alliant Reloder-10x | <<locked>> | 90% | 51,837 psi | 86% | 2674 fps | 100% |
| Alliant Reloder-15ᴾ | <<locked>> | 100% | 50,546 psi | 84% | 2736 fps | 96.7% |
| Alliant Reloder-7 | <<locked>> | 84% | 51,924 psi | 86% | 2615 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 88% | 51,909 psi | 86% | 2612 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 98% | 53,200 psi | 88% | 2766 fps | 96.5% |
| Bofors RP3ᴾ | <<locked>> | 100% | 45,542 psi | 76% | 2671 fps | 97.3% |
| Hodgdon Benchmark | <<locked>> | 94% | 53,040 psi | 88% | 2677 fps | 99.1% |
| Hodgdon BL-C2 | <<locked>> | 96% | 51,184 psi | 85% | 2753 fps | 99% |
| Hodgdon CFE223 | <<locked>> | 94% | 53,243 psi | 88% | 2835 fps | 97.2% |
| Hodgdon H322 | <<locked>> | 92% | 54,215 psi | 90% | 2749 fps | 100% |
| Hodgdon H335 | <<locked>> | 90% | 51,851 psi | 86% | 2723 fps | 99.8% |
| Hodgdon H4198 | <<locked>> | 84% | 52,199 psi | 87% | 2618 fps | 100% |
| Hodgdon H4895 | <<locked>> | 98% | 53,882 psi | 90% | 2772 fps | 98.3% |
| Hodgdon LEVERevolutionᴾ | <<locked>> | 100% | 51,663 psi | 86% | 2789 fps | 98.4% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 33,417 psi | 56% | 1617 fps | 100% |
| Hodgdon VARGET | <<locked>> | 98% | 52,185 psi | 87% | 2726 fps | 98% |
| IMR 3031 | <<locked>> | 98% | 51,706 psi | 86% | 2772 fps | 100% |
| IMR 4064ᴾ | <<locked>> | 100% | 50,734 psi | 84% | 2684 fps | 96.7% |
| IMR 4198 | <<locked>> | 90% | 52,779 psi | 88% | 2641 fps | 100% |
| IMR 4895ᴾ | <<locked>> | 100% | 51,735 psi | 86% | 2769 fps | 97.6% |
| IMR 8208 XBR | <<locked>> | 96% | 53,301 psi | 89% | 2726 fps | 98.7% |
| Lovex D073.4 | <<locked>> | 86% | 53,766 psi | 89% | 2733 fps | 99.6% |
| Lovex D073.5 | <<locked>> | 92% | 53,359 psi | 89% | 2723 fps | 99.3% |
| Lovex D073.6 | <<locked>> | 98% | 51,329 psi | 85% | 2740 fps | 99.6% |
| Lovex S053 | <<locked>> | 82% | 53,983 psi | 90% | 2549 fps | 100% |
| Lovex S060 | <<locked>> | 96% | 51,561 psi | 86% | 2651 fps | 97.4% |
| Lovex S062ᴾ | <<locked>> | 100% | 49,226 psi | 82% | 2680 fps | 98.3% |
| Norma 200 | <<locked>> | 86% | 51,750 psi | 86% | 2648 fps | 100% |
| Norma 201 | <<locked>> | 98% | 52,083 psi | 87% | 2710 fps | 98.6% |
| Norma 202 | <<locked>> | 98% | 52,315 psi | 87% | 2730 fps | 99.9% |
| Norma 203Bᴾ | <<locked>> | 100% | 49,574 psi | 82% | 2723 fps | 97.1% |
| Ramshot Big Gameᴾ | <<locked>> | 100% | 50,227 psi | 83% | 2746 fps | 96.9% |
| Ramshot Wild Boar | <<locked>> | 96% | 52,562 psi | 87% | 2753 fps | 97.5% |
| Ramshot X-Terminator | <<locked>> | 92% | 52,083 psi | 87% | 2684 fps | 97.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 33,504 psi | 56% | 1657 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 92% | 53,388 psi | 89% | 2726 fps | 99.6% |
| ReloadSwiss RS 52ᴾ | <<locked>> | 100% | 53,040 psi | 88% | 2841 fps | 97.2% |
| ReloadSwiss RS 60ᴾ | <<locked>> | 100% | 44,005 psi | 73% | 2703 fps | 98.3% |
| Rottweil R 901 | <<locked>> | 96% | 53,084 psi | 88% | 2710 fps | 99.8% |
| Rottweil R 902ᴾ | <<locked>> | 100% | 52,417 psi | 87% | 2707 fps | 98.7% |
| Rottweil R 903ᴾ | <<locked>> | 100% | 42,424 psi | 70% | 2605 fps | 96.3% |
| Shooters World AR Plus | <<locked>> | 86% | 53,766 psi | 89% | 2733 fps | 99.6% |
| Shooters World Match Rifle | <<locked>> | 98% | 51,329 psi | 85% | 2740 fps | 99.6% |
| Shooters World Precisionᴾ | <<locked>> | 100% | 49,226 psi | 82% | 2680 fps | 98.3% |
| Shooters World Tactical Rifle | <<locked>> | 90% | 53,969 psi | 90% | 2694 fps | 98.5% |
| SNPE Vectan BA6 1/2 | <<locked>> | 84% | 51,576 psi | 86% | 2365 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 88% | 52,736 psi | 88% | 2730 fps | 99.9% |
| SNPE Vectan SP 3 | <<locked>> | 90% | 52,518 psi | 87% | 2684 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 98% | 51,851 psi | 86% | 2730 fps | 97.4% |
| SNPE Vectan Tubal 3000 | <<locked>> | 96% | 52,228 psi | 87% | 2635 fps | 99.8% |
| SNPE Vectan Tubal 5000ᴾ | <<locked>> | 100% | 47,514 psi | 79% | 2579 fps | 99.9% |
| Somchem S321 | <<locked>> | 92% | 50,952 psi | 85% | 2717 fps | 98.7% |
| Somchem S335 | <<locked>> | 98% | 53,621 psi | 89% | 2674 fps | 100% |
| Somchem S341 | <<locked>> | 96% | 50,749 psi | 84% | 2697 fps | 97.1% |
| Somchem S355ᴾ | <<locked>> | 100% | 43,859 psi | 73% | 2615 fps | 96.4% |
| Vihtavuori N120 | <<locked>> | 86% | 53,722 psi | 89% | 2592 fps | 100% |
| Vihtavuori N130 | <<locked>> | 92% | 52,112 psi | 87% | 2625 fps | 100% |
| Vihtavuori N133 | <<locked>> | 96% | 51,619 psi | 86% | 2631 fps | 100% |
| Vihtavuori N135ᴾ | <<locked>> | 100% | 50,082 psi | 83% | 2690 fps | 100% |
| Vihtavuori N140ᴾ | <<locked>> | 100% | 52,692 psi | 88% | 2707 fps | 100% |
| Vihtavuori N150ᴾ | <<locked>> | 100% | 42,264 psi | 70% | 2559 fps | 97.3% |
| Vihtavuori N530 | <<locked>> | 96% | 53,809 psi | 89% | 2726 fps | 98.8% |
| Vihtavuori N540ᴾ | <<locked>> | 100% | 50,778 psi | 84% | 2700 fps | 99.7% |
| Winchester 748 | <<locked>> | 96% | 52,069 psi | 87% | 2769 fps | 99.3% |
| Winchester StaBALL Match | <<locked>> | 98% | 50,937 psi | 85% | 2736 fps | 97.9% |
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% | 49,023 psi | 81% | 2546 fps | 100% |
| Accurate 2015 | <<locked>> | 80% | 33,083 psi | 55% | 2339 fps | 99% |
| Accurate 2200 | <<locked>> | 82% | 46,122 psi | 77% | 2618 fps | 95.2% |
| Accurate 2230 | <<locked>> | 82% | 46,079 psi | 77% | 2625 fps | 95.7% |
| Accurate 2460 | <<locked>> | 80% | 35,404 psi | 59% | 2411 fps | 97.2% |
| Accurate 2495 | <<locked>> | 80% | 25,628 psi | 43% | 2224 fps | 97.3% |
| Accurate 2520 | <<locked>> | 80% | 31,053 psi | 52% | 2352 fps | 95.3% |
| Accurate 4064 | <<locked>> | 84% | 27,601 psi | 46% | 2287 fps | 95.3% |
| Accurate LT-30 | <<locked>> | 80% | 41,989 psi | 70% | 2441 fps | 99.5% |
| Accurate LT-32 | <<locked>> | 80% | 42,366 psi | 70% | 2451 fps | 98.4% |
| ADI AR 2206H | <<locked>> | 90% | 41,640 psi | 69% | 2559 fps | 95.1% |
| ADI AR 2207 | <<locked>> | 80% | 44,744 psi | 74% | 2516 fps | 100% |
| ADI AR 2208 | <<locked>> | 98% | 45,339 psi | 75% | 2602 fps | 95.2% |
| ADI AR 2219 | <<locked>> | 80% | 39,813 psi | 66% | 2520 fps | 99.2% |
| ADI Benchmark 8208 | <<locked>> | 84% | 36,521 psi | 61% | 2428 fps | 95% |
| Alliant AR-Comp | <<locked>> | 80% | 30,371 psi | 50% | 2359 fps | 99.9% |
| Alliant Power Pro 1200-R | 36.5 gr | 82% | 39,131 psi | 65% | 2562 fps | 95.3% |
| Alliant Power Pro 2000-MR | <<locked>> | 98% | 49,748 psi | 83% | 2782 fps | 95.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 94% | 38,072 psi | 63% | 2516 fps | 95.3% |
| Alliant Reloder-10x | <<locked>> | 80% | 38,116 psi | 63% | 2451 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 96% | 44,469 psi | 74% | 2635 fps | 95.3% |
| Alliant Reloder-7 | <<locked>> | 80% | 46,006 psi | 76% | 2530 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 40,292 psi | 67% | 2428 fps | 99.5% |
| Baschieri & Pellagri 107 | <<locked>> | 94% | 46,717 psi | 78% | 2661 fps | 95% |
| Bofors RP3 | <<locked>> | 94% | 37,188 psi | 62% | 2513 fps | 95.1% |
| Hodgdon Benchmark | <<locked>> | 80% | 34,679 psi | 58% | 2346 fps | 95.1% |
| Hodgdon BL-C2 | 39.8 gr | 84% | 33,982 psi | 56% | 2434 fps | 95% |
| Hodgdon CFE223 | <<locked>> | 90% | 46,253 psi | 77% | 2713 fps | 95.6% |
| Hodgdon H322 | <<locked>> | 80% | 36,448 psi | 61% | 2451 fps | 98.6% |
| Hodgdon H335 | <<locked>> | 80% | 36,869 psi | 61% | 2464 fps | 97.8% |
| Hodgdon H4198 | <<locked>> | 80% | 46,282 psi | 77% | 2526 fps | 99.7% |
| Hodgdon H4895 | <<locked>> | 88% | 39,291 psi | 65% | 2520 fps | 95.2% |
| Hodgdon LEVERevolution | <<locked>> | 92% | 39,943 psi | 66% | 2579 fps | 95.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 24,700 psi | 41% | 1444 fps | 100% |
| Hodgdon VARGET | <<locked>> | 90% | 40,741 psi | 68% | 2530 fps | 95.4% |
| IMR 3031 | <<locked>> | 80% | 29,095 psi | 48% | 2333 fps | 97.3% |
| IMR 4064 | <<locked>> | 96% | 44,657 psi | 74% | 2585 fps | 95.3% |
| IMR 4198 | <<locked>> | 80% | 39,334 psi | 65% | 2431 fps | 100% |
| IMR 4895 | <<locked>> | 94% | 42,641 psi | 71% | 2615 fps | 95.6% |
| IMR 8208 XBR | <<locked>> | 84% | 36,521 psi | 61% | 2428 fps | 95% |
| Lovex D073.4 | <<locked>> | 80% | 43,395 psi | 72% | 2569 fps | 98.4% |
| Lovex D073.5 | <<locked>> | 80% | 35,418 psi | 59% | 2411 fps | 95.9% |
| Lovex D073.6 | <<locked>> | 84% | 31,952 psi | 53% | 2385 fps | 95.6% |
| Lovex S053 | <<locked>> | 80% | 50,966 psi | 85% | 2510 fps | 100% |
| Lovex S060 | <<locked>> | 90% | 43,120 psi | 72% | 2510 fps | 95.5% |
| Lovex S062 | <<locked>> | 90% | 36,274 psi | 60% | 2444 fps | 95.1% |
| Norma 200 | <<locked>> | 80% | 42,931 psi | 71% | 2516 fps | 100% |
| Norma 201 | <<locked>> | 86% | 36,013 psi | 60% | 2421 fps | 95% |
| Norma 202 | <<locked>> | 80% | 29,559 psi | 49% | 2297 fps | 95.5% |
| Norma 203B | <<locked>> | 94% | 40,915 psi | 68% | 2572 fps | 95% |
| Ramshot Big Game | <<locked>> | 96% | 44,048 psi | 73% | 2638 fps | 95.3% |
| Ramshot Wild Boar | <<locked>> | 90% | 43,178 psi | 72% | 2595 fps | 95.5% |
| Ramshot X-Terminator | <<locked>> | 86% | 42,786 psi | 71% | 2530 fps | 95.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 24,642 psi | 41% | 1476 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 36,419 psi | 61% | 2428 fps | 96.6% |
| ReloadSwiss RS 52 | <<locked>> | 96% | 46,514 psi | 77% | 2733 fps | 95.7% |
| ReloadSwiss RS 60 | <<locked>> | 94% | 36,260 psi | 60% | 2530 fps | 95.7% |
| Rottweil R 901 | <<locked>> | 80% | 33,228 psi | 55% | 2343 fps | 96.5% |
| Rottweil R 902 | <<locked>> | 88% | 36,260 psi | 60% | 2418 fps | 95.1% |
| Rottweil R 903 | <<locked>> | 98% | 39,668 psi | 66% | 2552 fps | 95.5% |
| Shooters World AR Plus | <<locked>> | 80% | 43,395 psi | 72% | 2569 fps | 98.4% |
| Shooters World Match Rifle | <<locked>> | 84% | 31,952 psi | 53% | 2385 fps | 95.6% |
| Shooters World Precision | <<locked>> | 90% | 36,274 psi | 60% | 2444 fps | 95.1% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 38,537 psi | 64% | 2434 fps | 95.2% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 46,702 psi | 78% | 2303 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 40,437 psi | 67% | 2526 fps | 98.5% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 38,435 psi | 64% | 2454 fps | 99.4% |
| SNPE Vectan SP 9 | <<locked>> | 92% | 42,685 psi | 71% | 2575 fps | 95.4% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 31,720 psi | 53% | 2264 fps | 96.2% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 27,412 psi | 46% | 2178 fps | 95.7% |
| Somchem S321 | <<locked>> | 82% | 36,376 psi | 60% | 2451 fps | 95.4% |
| Somchem S335 | <<locked>> | 80% | 31,198 psi | 52% | 2274 fps | 97% |
| Somchem S341 | <<locked>> | 92% | 44,382 psi | 74% | 2595 fps | 95.7% |
| Somchem S355 | <<locked>> | 98% | 41,104 psi | 68% | 2562 fps | 95.6% |
| Vihtavuori N120 | <<locked>> | 80% | 44,788 psi | 74% | 2474 fps | 100% |
| Vihtavuori N130 | <<locked>> | 80% | 36,158 psi | 60% | 2362 fps | 99.8% |
| Vihtavuori N133 | <<locked>> | 80% | 31,531 psi | 52% | 2277 fps | 98.6% |
| Vihtavuori N135 | <<locked>> | 80% | 26,585 psi | 44% | 2234 fps | 97.4% |
| Vihtavuori N140 | <<locked>> | 80% | 28,021 psi | 47% | 2238 fps | 95.1% |
| Vihtavuori N150 | <<locked>> | 94% | 34,722 psi | 58% | 2411 fps | 95.1% |
| Vihtavuori N530 | <<locked>> | 84% | 36,593 psi | 61% | 2428 fps | 95.2% |
| Vihtavuori N540 | <<locked>> | 84% | 30,545 psi | 51% | 2316 fps | 95.6% |
| Winchester 748 | 39.1 gr | 84% | 35,012 psi | 58% | 2454 fps | 95.6% |
| Winchester StaBALL Match | <<locked>> | 90% | 39,204 psi | 65% | 2530 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 84 powders for .308 Win. Ackley Improved loaded with the .311 | 155gr | Frontier FBSP. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,844 fps; across all powders the maximum-charge window runs from 1,617 fps to 2,844 fps. Accurate 2495 gives the best case fill at 100 %, and 84 of the 84 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 155.0 gr projectile in 0.311" calls for a 1:11.5 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 1200-R, Winchester 748, Hodgdon BL-C2 rank at the top here: for .308 Win. Ackley Improved with the .311 | 155gr | Frontier FBSP 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.