Load Specifications
Load data in caliber .308 Win. Ackley Improved with .308 | 185gr | Lapua Mega bullet and 94 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 ReloadSwiss RS 60.
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 2015 | <<locked>> | 88% | 52,910 psi | 88% | 2470 fps | 100% |
| Accurate 2460 | <<locked>> | 84% | 51,082 psi | 85% | 2490 fps | 100% |
| Accurate 2495 | <<locked>> | 94% | 53,272 psi | 89% | 2526 fps | 100% |
| Accurate 2520 | <<locked>> | 88% | 52,475 psi | 87% | 2546 fps | 100% |
| Accurate 4064 | <<locked>> | 96% | 53,171 psi | 88% | 2566 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 45,092 psi | 75% | 2523 fps | 97.6% |
| Accurate LT-30 | <<locked>> | 82% | 52,765 psi | 88% | 2421 fps | 100% |
| Accurate LT-32 | <<locked>> | 82% | 53,171 psi | 88% | 2441 fps | 100% |
| ADI AR 2206H | <<locked>> | 90% | 51,837 psi | 86% | 2552 fps | 99.4% |
| ADI AR 2208 | <<locked>> | 96% | 52,591 psi | 87% | 2546 fps | 99.1% |
| ADI AR 2219 | <<locked>> | 82% | 52,939 psi | 88% | 2526 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 88% | 51,111 psi | 85% | 2513 fps | 99.8% |
| Alliant AR-Comp | <<locked>> | 90% | 54,201 psi | 90% | 2539 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 84% | 52,489 psi | 87% | 2605 fps | 99.8% |
| Alliant Power Pro 2000-MR | <<locked>> | 94% | 54,331 psi | 90% | 2697 fps | 99.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 96% | 51,750 psi | 86% | 2566 fps | 99.8% |
| Alliant Reloder-10x | <<locked>> | 84% | 53,055 psi | 88% | 2480 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 94% | 52,649 psi | 87% | 2585 fps | 99.2% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 45,165 psi | 75% | 2526 fps | 97.7% |
| Alliant Reloder-17ᴾ | <<locked>> | 100% | 52,040 psi | 86% | 2667 fps | 99.8% |
| Baschieri & Pellagri 106 | <<locked>> | 82% | 51,909 psi | 86% | 2425 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 90% | 51,358 psi | 85% | 2566 fps | 98.7% |
| Bofors RP3 | <<locked>> | 96% | 52,127 psi | 87% | 2582 fps | 99.9% |
| Hodgdon Benchmark | <<locked>> | 88% | 53,461 psi | 89% | 2500 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 90% | 53,084 psi | 88% | 2585 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 86% | 51,227 psi | 85% | 2621 fps | 99.1% |
| Hodgdon H322 | <<locked>> | 84% | 51,851 psi | 86% | 2513 fps | 100% |
| Hodgdon H335 | <<locked>> | 84% | 52,837 psi | 88% | 2539 fps | 100% |
| Hodgdon H380 | <<locked>> | 96% | 53,751 psi | 89% | 2589 fps | 98.5% |
| Hodgdon H4895 | <<locked>> | 90% | 52,286 psi | 87% | 2562 fps | 99.7% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 41,321 psi | 69% | 2421 fps | 98.2% |
| Hodgdon LEVERevolution | <<locked>> | 94% | 54,056 psi | 90% | 2635 fps | 99.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,679 psi | 58% | 1526 fps | 100% |
| Hodgdon VARGET | <<locked>> | 92% | 53,606 psi | 89% | 2566 fps | 99.8% |
| IMR 3031 | <<locked>> | 90% | 51,242 psi | 85% | 2549 fps | 100% |
| IMR 4064 | <<locked>> | 94% | 52,228 psi | 87% | 2533 fps | 99.2% |
| IMR 4166 Enduron | <<locked>> | 92% | 53,084 psi | 88% | 2513 fps | 96.2% |
| IMR 4198 | <<locked>> | 84% | 53,476 psi | 89% | 2441 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 98% | 52,127 psi | 87% | 2530 fps | 95.9% |
| IMR 4831ᴾ | <<locked>> | 100% | 43,279 psi | 72% | 2474 fps | 97.2% |
| IMR 4895 | <<locked>> | 94% | 53,969 psi | 90% | 2615 fps | 99.7% |
| IMR 8208 XBR | <<locked>> | 88% | 51,111 psi | 85% | 2513 fps | 99.8% |
| Lovex D073.5 | <<locked>> | 84% | 50,865 psi | 85% | 2497 fps | 100% |
| Lovex D073.6 | <<locked>> | 92% | 54,157 psi | 90% | 2579 fps | 100% |
| Lovex S060 | <<locked>> | 90% | 52,156 psi | 87% | 2490 fps | 99.4% |
| Lovex S062 | <<locked>> | 94% | 51,663 psi | 86% | 2533 fps | 99.9% |
| Lovex S065ᴾ | <<locked>> | 100% | 50,473 psi | 84% | 2516 fps | 97.2% |
| Norma 201 | <<locked>> | 92% | 53,882 psi | 90% | 2549 fps | 100% |
| Norma 202 | <<locked>> | 92% | 54,056 psi | 90% | 2552 fps | 100% |
| Norma 203B | <<locked>> | 94% | 51,808 psi | 86% | 2572 fps | 99.5% |
| Norma URPᴾ | <<locked>> | 100% | 45,078 psi | 75% | 2513 fps | 97.4% |
| Ramshot Big Game | <<locked>> | 94% | 51,822 psi | 86% | 2595 fps | 99.4% |
| Ramshot TAC | <<locked>> | 88% | 51,488 psi | 86% | 2523 fps | 97.5% |
| Ramshot Wild Boar | <<locked>> | 90% | 53,882 psi | 90% | 2589 fps | 99.6% |
| Ramshot X-Terminator | <<locked>> | 86% | 52,243 psi | 87% | 2513 fps | 99.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 34,954 psi | 58% | 1562 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 86% | 54,302 psi | 90% | 2546 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 96% | 54,331 psi | 90% | 2572 fps | 97.1% |
| ReloadSwiss RS 52 | <<locked>> | 92% | 52,373 psi | 87% | 2644 fps | 99.3% |
| ReloadSwiss RS 60 | <<locked>> | 98% | 52,054 psi | 86% | 2674 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 44,991 psi | 75% | 2539 fps | 97.2% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 46,209 psi | 77% | 2556 fps | 96.6% |
| Rottweil R 901 | <<locked>> | 88% | 51,764 psi | 86% | 2493 fps | 100% |
| Rottweil R 902 | <<locked>> | 94% | 54,215 psi | 90% | 2546 fps | 100% |
| Rottweil R 903 | <<locked>> | 98% | 51,590 psi | 86% | 2566 fps | 99.7% |
| Shooters World Long Rifleᴾ | <<locked>> | 100% | 50,473 psi | 84% | 2516 fps | 97.2% |
| Shooters World Match Rifle | <<locked>> | 92% | 54,157 psi | 90% | 2579 fps | 100% |
| Shooters World Precision | <<locked>> | 94% | 51,663 psi | 86% | 2533 fps | 99.9% |
| Shooters World Tactical Rifle | <<locked>> | 84% | 54,012 psi | 90% | 2516 fps | 99.9% |
| SNPE Vectan SP 10 | <<locked>> | 82% | 53,592 psi | 89% | 2543 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 98% | 53,359 psi | 89% | 2621 fps | 99.5% |
| SNPE Vectan SP 3 | <<locked>> | 84% | 53,621 psi | 89% | 2493 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 90% | 52,866 psi | 88% | 2546 fps | 98.2% |
| SNPE Vectan SP 9 | <<locked>> | 92% | 53,548 psi | 89% | 2572 fps | 99.5% |
| SNPE Vectan Tubal 3000 | <<locked>> | 90% | 53,040 psi | 88% | 2461 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 96% | 52,417 psi | 87% | 2457 fps | 100% |
| SNPE Vectan Tubal 7000ᴾ | <<locked>> | 100% | 50,952 psi | 85% | 2477 fps | 95.8% |
| Somchem S321 | <<locked>> | 86% | 52,098 psi | 87% | 2546 fps | 100% |
| Somchem S335 | <<locked>> | 90% | 52,025 psi | 86% | 2461 fps | 100% |
| Somchem S341 | <<locked>> | 90% | 52,504 psi | 87% | 2546 fps | 99.4% |
| Somchem S355 | <<locked>> | 98% | 52,475 psi | 87% | 2569 fps | 99.7% |
| Somchem S365ᴾ | <<locked>> | 100% | 40,190 psi | 67% | 2467 fps | 99.2% |
| Vihtavuori N130 | <<locked>> | 86% | 52,649 psi | 87% | 2428 fps | 100% |
| Vihtavuori N133 | <<locked>> | 90% | 52,953 psi | 88% | 2448 fps | 100% |
| Vihtavuori N135 | <<locked>> | 94% | 53,374 psi | 89% | 2520 fps | 100% |
| Vihtavuori N140 | <<locked>> | 92% | 51,416 psi | 85% | 2493 fps | 100% |
| Vihtavuori N150ᴾ | <<locked>> | 100% | 53,722 psi | 89% | 2549 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 47,790 psi | 79% | 2516 fps | 97.8% |
| Vihtavuori N530 | <<locked>> | 88% | 51,634 psi | 86% | 2513 fps | 99.9% |
| Vihtavuori N540 | <<locked>> | 94% | 52,823 psi | 88% | 2536 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 46,644 psi | 77% | 2520 fps | 97.5% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 48,878 psi | 81% | 2507 fps | 99.4% |
| Winchester 748 | <<locked>> | 90% | 54,099 psi | 90% | 2602 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 92% | 52,895 psi | 88% | 2579 fps | 99.8% |
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% | 41,510 psi | 69% | 2310 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 44,759 psi | 74% | 2398 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 33,866 psi | 56% | 2231 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 40,059 psi | 67% | 2359 fps | 99.7% |
| Accurate 4064 | <<locked>> | 80% | 32,024 psi | 53% | 2215 fps | 99.1% |
| Accurate 4350 | <<locked>> | 94% | 36,535 psi | 61% | 2365 fps | 95.3% |
| Accurate LT-30 | <<locked>> | 80% | 49,719 psi | 83% | 2379 fps | 100% |
| Accurate LT-32 | <<locked>> | 80% | 50,111 psi | 83% | 2398 fps | 100% |
| ADI AR 2206H | <<locked>> | 80% | 37,884 psi | 63% | 2313 fps | 97% |
| ADI AR 2208 | <<locked>> | 82% | 34,374 psi | 57% | 2224 fps | 95% |
| ADI AR 2219 | <<locked>> | 80% | 49,821 psi | 83% | 2487 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 80% | 39,885 psi | 66% | 2329 fps | 98.6% |
| Alliant AR-Comp | <<locked>> | 80% | 38,986 psi | 65% | 2333 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 46,064 psi | 77% | 2503 fps | 99.2% |
| Alliant Power Pro 2000-MR | 41.7 gr | 82% | 36,434 psi | 61% | 2369 fps | 95.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 31,328 psi | 52% | 2198 fps | 96% |
| Alliant Reloder-10x | <<locked>> | 80% | 46,963 psi | 78% | 2398 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 33,852 psi | 56% | 2251 fps | 95.1% |
| Alliant Reloder-16 | <<locked>> | 94% | 37,695 psi | 63% | 2379 fps | 95.4% |
| Alliant Reloder-17 | <<locked>> | 86% | 32,996 psi | 55% | 2303 fps | 95.6% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 48,515 psi | 81% | 2379 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 36,680 psi | 61% | 2310 fps | 95.4% |
| Bofors RP3 | <<locked>> | 80% | 30,516 psi | 51% | 2192 fps | 95.8% |
| Hodgdon Benchmark | <<locked>> | 80% | 41,945 psi | 70% | 2326 fps | 99.3% |
| Hodgdon BL-C2 | <<locked>> | 80% | 37,884 psi | 63% | 2343 fps | 98.7% |
| Hodgdon CFE223 | <<locked>> | 80% | 41,713 psi | 69% | 2461 fps | 97.5% |
| Hodgdon H322 | <<locked>> | 80% | 45,585 psi | 76% | 2425 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 46,006 psi | 76% | 2444 fps | 100% |
| Hodgdon H380 | <<locked>> | 86% | 38,725 psi | 64% | 2346 fps | 95.2% |
| Hodgdon H4895 | <<locked>> | 80% | 38,174 psi | 63% | 2326 fps | 97.7% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 32,343 psi | 54% | 2238 fps | 95.4% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 34,084 psi | 57% | 2290 fps | 96.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,817 psi | 43% | 1362 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 36,811 psi | 61% | 2283 fps | 97.2% |
| IMR 3031 | <<locked>> | 80% | 37,043 psi | 62% | 2329 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 33,895 psi | 56% | 2208 fps | 95.2% |
| IMR 4166 Enduron | <<locked>> | 90% | 49,792 psi | 83% | 2464 fps | 95.5% |
| IMR 4198 | <<locked>> | 80% | 47,587 psi | 79% | 2365 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 96% | 48,849 psi | 81% | 2480 fps | 95.2% |
| IMR 4831 | <<locked>> | 94% | 35,592 psi | 59% | 2326 fps | 95% |
| IMR 4895 | <<locked>> | 80% | 34,621 psi | 58% | 2277 fps | 96.1% |
| IMR 8208 XBR | <<locked>> | 80% | 39,885 psi | 66% | 2329 fps | 98.6% |
| Lovex D073.5 | <<locked>> | 80% | 44,614 psi | 74% | 2405 fps | 99.7% |
| Lovex D073.6 | <<locked>> | 80% | 36,260 psi | 60% | 2300 fps | 99.2% |
| Lovex S060 | <<locked>> | 80% | 38,812 psi | 64% | 2267 fps | 97.3% |
| Lovex S062 | <<locked>> | 80% | 33,634 psi | 56% | 2218 fps | 97.2% |
| Lovex S065 | <<locked>> | 94% | 42,076 psi | 70% | 2379 fps | 95.2% |
| Norma 201 | <<locked>> | 80% | 37,246 psi | 62% | 2280 fps | 98.1% |
| Norma 202 | <<locked>> | 80% | 37,217 psi | 62% | 2290 fps | 99.6% |
| Norma 203B | <<locked>> | 80% | 33,257 psi | 55% | 2241 fps | 95.6% |
| Norma URP | <<locked>> | 94% | 37,405 psi | 62% | 2369 fps | 95.3% |
| Ramshot Big Game | <<locked>> | 82% | 34,896 psi | 58% | 2297 fps | 95.8% |
| Ramshot TAC | <<locked>> | 82% | 42,366 psi | 70% | 2372 fps | 95.4% |
| Ramshot Wild Boar | <<locked>> | 80% | 38,725 psi | 64% | 2343 fps | 97.2% |
| Ramshot X-Terminator | <<locked>> | 80% | 43,250 psi | 72% | 2372 fps | 98.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 25,904 psi | 43% | 1391 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 44,918 psi | 75% | 2411 fps | 99.9% |
| ReloadSwiss RS 50 | <<locked>> | 90% | 44,701 psi | 74% | 2425 fps | 95% |
| ReloadSwiss RS 52 | 39.5 gr | 80% | 34,911 psi | 58% | 2333 fps | 95.5% |
| ReloadSwiss RS 60 | 40.1 gr | 80% | 28,979 psi | 48% | 2205 fps | 96.4% |
| ReloadSwiss RS 62 | <<locked>> | 96% | 39,407 psi | 65% | 2438 fps | 95.7% |
| ReloadSwiss RS 70 | <<locked>> | 98% | 43,265 psi | 72% | 2500 fps | 95.7% |
| Rottweil R 901 | <<locked>> | 80% | 40,973 psi | 68% | 2326 fps | 99.8% |
| Rottweil R 902 | <<locked>> | 80% | 35,331 psi | 59% | 2231 fps | 97.6% |
| Rottweil R 903 | <<locked>> | 82% | 30,632 psi | 51% | 2188 fps | 95.4% |
| Shooters World Long Rifle | <<locked>> | 94% | 42,076 psi | 70% | 2379 fps | 95.2% |
| Shooters World Match Rifle | <<locked>> | 80% | 36,260 psi | 60% | 2300 fps | 99.2% |
| Shooters World Precision | <<locked>> | 80% | 33,634 psi | 56% | 2218 fps | 97.2% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 47,297 psi | 79% | 2421 fps | 99.4% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 49,922 psi | 83% | 2493 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 34,084 psi | 57% | 2283 fps | 95.6% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 47,398 psi | 79% | 2408 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 40,292 psi | 67% | 2346 fps | 95.5% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 36,535 psi | 61% | 2287 fps | 96.6% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 38,841 psi | 65% | 2247 fps | 99.7% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 31,836 psi | 53% | 2126 fps | 99.4% |
| SNPE Vectan Tubal 7000 | <<locked>> | 98% | 47,485 psi | 79% | 2428 fps | 95% |
| Somchem S321 | <<locked>> | 80% | 42,641 psi | 71% | 2398 fps | 99.2% |
| Somchem S335 | <<locked>> | 80% | 38,406 psi | 64% | 2254 fps | 99.9% |
| Somchem S341 | <<locked>> | 80% | 37,318 psi | 62% | 2297 fps | 96.7% |
| Somchem S355 | <<locked>> | 82% | 31,850 psi | 53% | 2201 fps | 95.6% |
| Somchem S365 | <<locked>> | 90% | 29,544 psi | 49% | 2228 fps | 95.9% |
| Vihtavuori N130 | <<locked>> | 80% | 44,019 psi | 73% | 2313 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 38,928 psi | 65% | 2247 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 34,200 psi | 57% | 2228 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 35,172 psi | 58% | 2234 fps | 99.5% |
| Vihtavuori N150 | <<locked>> | 80% | 28,340 psi | 47% | 2103 fps | 95.8% |
| Vihtavuori N160 | <<locked>> | 94% | 39,378 psi | 65% | 2372 fps | 95.8% |
| Vihtavuori N530 | <<locked>> | 80% | 39,711 psi | 66% | 2323 fps | 98.6% |
| Vihtavuori N540 | <<locked>> | 80% | 33,707 psi | 56% | 2221 fps | 99% |
| Vihtavuori N550 | <<locked>> | 94% | 38,508 psi | 64% | 2379 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 33,011 psi | 55% | 2215 fps | 95.7% |
| Winchester 748 | <<locked>> | 80% | 38,653 psi | 64% | 2362 fps | 99.1% |
| Winchester StaBALL Match | <<locked>> | 80% | 35,549 psi | 59% | 2287 fps | 97% |
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 94 powders for .308 Win. Ackley Improved loaded with the .308 | 185gr | Lapua Mega. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,697 fps; across all powders the maximum-charge window runs from 1,526 fps to 2,697 fps. Accurate 4350 gives the best case fill at 100 %, and 94 of the 94 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (415 MPa), the top charges use 58–90 %, leaving at least 10 % headroom. The 185.0 gr projectile in 0.308" calls for a 1:15.5 twist; slower twists will usually not stabilise this weight. Accurate 4350, Alliant Reloder-16, Alliant Reloder-17 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, ReloadSwiss RS 60 rank at the top here: for .308 Win. Ackley Improved with the .308 | 185gr | Lapua Mega 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.