Load Specifications
Load data in caliber .308 Win. Ackley Improved with .308 | 185gr | Berger Classic Hybrid Hunter 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 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>> | 90% | 53,316 psi | 89% | 2457 fps | 100% |
| Accurate 2200 | <<locked>> | 82% | 53,577 psi | 89% | 2536 fps | 98.8% |
| Accurate 2230 | <<locked>> | 82% | 54,375 psi | 90% | 2549 fps | 99.2% |
| Accurate 2460 | <<locked>> | 86% | 51,677 psi | 86% | 2477 fps | 100% |
| Accurate 2495 | <<locked>> | 96% | 53,577 psi | 89% | 2513 fps | 100% |
| Accurate 2520 | <<locked>> | 90% | 52,881 psi | 88% | 2533 fps | 100% |
| Accurate 4064 | <<locked>> | 98% | 52,794 psi | 88% | 2543 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 41,727 psi | 69% | 2444 fps | 96.4% |
| Accurate LT-30 | <<locked>> | 84% | 53,954 psi | 90% | 2411 fps | 100% |
| Accurate LT-32 | <<locked>> | 84% | 54,389 psi | 90% | 2431 fps | 100% |
| ADI AR 2206H | <<locked>> | 92% | 52,272 psi | 87% | 2533 fps | 99.3% |
| ADI AR 2208 | <<locked>> | 98% | 53,113 psi | 88% | 2526 fps | 98.9% |
| ADI AR 2219 | <<locked>> | 84% | 53,809 psi | 89% | 2516 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 90% | 51,779 psi | 86% | 2497 fps | 99.8% |
| Alliant AR-Comp | <<locked>> | 92% | 54,172 psi | 90% | 2520 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 86% | 53,142 psi | 88% | 2589 fps | 99.7% |
| Alliant Power Pro 2000-MR | <<locked>> | 94% | 51,547 psi | 86% | 2628 fps | 98.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 98% | 52,040 psi | 86% | 2546 fps | 99.7% |
| Alliant Reloder-10x | <<locked>> | 86% | 53,563 psi | 89% | 2464 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 96% | 52,982 psi | 88% | 2566 fps | 99% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 42,714 psi | 71% | 2451 fps | 96.5% |
| Alliant Reloder-17ᴾ | <<locked>> | 100% | 48,921 psi | 81% | 2592 fps | 99.3% |
| Baschieri & Pellagri 106 | <<locked>> | 84% | 52,808 psi | 88% | 2411 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 92% | 51,822 psi | 86% | 2546 fps | 98.5% |
| Bofors RP3 | <<locked>> | 98% | 52,127 psi | 87% | 2559 fps | 99.7% |
| Hodgdon Benchmark | <<locked>> | 90% | 54,288 psi | 90% | 2487 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 92% | 53,490 psi | 89% | 2569 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 88% | 51,793 psi | 86% | 2602 fps | 98.9% |
| Hodgdon H322 | <<locked>> | 86% | 52,286 psi | 87% | 2497 fps | 100% |
| Hodgdon H335 | <<locked>> | 86% | 53,258 psi | 88% | 2523 fps | 100% |
| Hodgdon H380 | <<locked>> | 98% | 54,041 psi | 90% | 2569 fps | 98.2% |
| Hodgdon H4895 | <<locked>> | 92% | 52,736 psi | 88% | 2546 fps | 99.6% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 38,899 psi | 65% | 2352 fps | 97.2% |
| Hodgdon LEVERevolution | <<locked>> | 96% | 54,157 psi | 90% | 2615 fps | 99.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,287 psi | 57% | 1496 fps | 100% |
| Hodgdon VARGET | <<locked>> | 94% | 54,346 psi | 90% | 2549 fps | 99.6% |
| IMR 3031 | <<locked>> | 92% | 51,605 psi | 86% | 2536 fps | 100% |
| IMR 4064 | <<locked>> | 96% | 52,576 psi | 87% | 2510 fps | 99% |
| IMR 4166 Enduron | <<locked>> | 94% | 53,722 psi | 89% | 2490 fps | 95.8% |
| IMR 4198 | <<locked>> | 86% | 54,230 psi | 90% | 2428 fps | 100% |
| IMR 4831ᴾ | <<locked>> | 100% | 40,321 psi | 67% | 2398 fps | 96% |
| IMR 4895 | <<locked>> | 96% | 54,244 psi | 90% | 2595 fps | 99.5% |
| IMR 8208 XBR | <<locked>> | 90% | 51,779 psi | 86% | 2497 fps | 99.8% |
| Lovex D073.5 | <<locked>> | 86% | 51,576 psi | 86% | 2487 fps | 100% |
| Lovex D073.6 | <<locked>> | 94% | 54,418 psi | 90% | 2559 fps | 100% |
| Lovex S060 | <<locked>> | 92% | 53,069 psi | 88% | 2477 fps | 99.3% |
| Lovex S062 | <<locked>> | 96% | 51,851 psi | 86% | 2510 fps | 99.8% |
| Lovex S065ᴾ | <<locked>> | 100% | 47,718 psi | 79% | 2448 fps | 96.1% |
| Norma 200 | <<locked>> | 82% | 53,563 psi | 89% | 2441 fps | 100% |
| Norma 201 | <<locked>> | 94% | 54,433 psi | 90% | 2533 fps | 99.9% |
| Norma 202 | <<locked>> | 92% | 51,271 psi | 85% | 2493 fps | 100% |
| Norma 203B | <<locked>> | 96% | 52,040 psi | 86% | 2556 fps | 99.3% |
| Norma URPᴾ | <<locked>> | 100% | 42,424 psi | 70% | 2441 fps | 96.3% |
| Ramshot Big Game | <<locked>> | 96% | 52,141 psi | 87% | 2575 fps | 99.2% |
| Ramshot TAC | <<locked>> | 90% | 52,359 psi | 87% | 2507 fps | 97.3% |
| Ramshot Wild Boar | <<locked>> | 92% | 54,404 psi | 90% | 2572 fps | 99.4% |
| Ramshot X-Terminator | <<locked>> | 88% | 53,287 psi | 89% | 2503 fps | 99.2% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 34,548 psi | 57% | 1532 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 86% | 51,474 psi | 86% | 2484 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 96% | 51,213 psi | 85% | 2500 fps | 96% |
| ReloadSwiss RS 52 | <<locked>> | 94% | 52,533 psi | 87% | 2621 fps | 99% |
| ReloadSwiss RS 60ᴾ | <<locked>> | 100% | 52,344 psi | 87% | 2651 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 42,018 psi | 70% | 2464 fps | 95.9% |
| Rottweil R 901 | <<locked>> | 90% | 52,141 psi | 87% | 2474 fps | 100% |
| Rottweil R 902 | <<locked>> | 96% | 54,389 psi | 90% | 2523 fps | 99.9% |
| Rottweil R 903ᴾ | <<locked>> | 100% | 51,648 psi | 86% | 2543 fps | 99.6% |
| Shooters World Long Rifleᴾ | <<locked>> | 100% | 47,718 psi | 79% | 2448 fps | 96.1% |
| Shooters World Match Rifle | <<locked>> | 94% | 54,418 psi | 90% | 2559 fps | 100% |
| Shooters World Precision | <<locked>> | 96% | 51,851 psi | 86% | 2510 fps | 99.8% |
| Shooters World Tactical Rifle | <<locked>> | 84% | 51,314 psi | 85% | 2454 fps | 99.6% |
| SNPE Vectan SP 10 | <<locked>> | 84% | 54,302 psi | 90% | 2530 fps | 100% |
| SNPE Vectan SP 11ᴾ | <<locked>> | 100% | 53,795 psi | 89% | 2605 fps | 99.4% |
| SNPE Vectan SP 3 | <<locked>> | 84% | 51,126 psi | 85% | 2441 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 92% | 53,461 psi | 89% | 2530 fps | 97.9% |
| SNPE Vectan SP 9 | <<locked>> | 94% | 53,983 psi | 90% | 2556 fps | 99.4% |
| SNPE Vectan Tubal 3000 | <<locked>> | 92% | 53,432 psi | 89% | 2441 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 98% | 52,736 psi | 88% | 2438 fps | 100% |
| Somchem S321 | <<locked>> | 88% | 52,736 psi | 88% | 2530 fps | 99.9% |
| Somchem S335 | <<locked>> | 92% | 52,417 psi | 87% | 2444 fps | 100% |
| Somchem S341 | <<locked>> | 92% | 53,040 psi | 88% | 2530 fps | 99.2% |
| Somchem S355ᴾ | <<locked>> | 100% | 52,460 psi | 87% | 2546 fps | 99.5% |
| Somchem S365ᴾ | <<locked>> | 100% | 37,884 psi | 63% | 2398 fps | 98.4% |
| Vihtavuori N130 | <<locked>> | 88% | 53,432 psi | 89% | 2418 fps | 100% |
| Vihtavuori N133 | <<locked>> | 92% | 53,229 psi | 88% | 2431 fps | 100% |
| Vihtavuori N135 | <<locked>> | 96% | 53,229 psi | 88% | 2497 fps | 100% |
| Vihtavuori N140 | <<locked>> | 94% | 51,576 psi | 86% | 2474 fps | 100% |
| Vihtavuori N150ᴾ | <<locked>> | 100% | 50,720 psi | 84% | 2487 fps | 99.9% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 44,831 psi | 74% | 2444 fps | 96.8% |
| Vihtavuori N530 | <<locked>> | 90% | 52,098 psi | 87% | 2493 fps | 99.8% |
| Vihtavuori N540 | <<locked>> | 96% | 52,953 psi | 88% | 2513 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 43,743 psi | 73% | 2451 fps | 96.4% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 46,050 psi | 77% | 2434 fps | 98.7% |
| Winchester 748 | <<locked>> | 92% | 54,346 psi | 90% | 2582 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 94% | 53,374 psi | 89% | 2562 fps | 99.6% |
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% | 39,247 psi | 65% | 2254 fps | 100% |
| Accurate 2200 | <<locked>> | 80% | 50,314 psi | 84% | 2487 fps | 98.4% |
| Accurate 2230 | <<locked>> | 80% | 50,952 psi | 85% | 2500 fps | 98.8% |
| Accurate 2460 | <<locked>> | 80% | 42,453 psi | 71% | 2343 fps | 99.8% |
| Accurate 2495 | <<locked>> | 80% | 31,749 psi | 53% | 2175 fps | 99.9% |
| Accurate 2520 | <<locked>> | 80% | 37,579 psi | 62% | 2297 fps | 99.2% |
| Accurate 4064 | <<locked>> | 80% | 30,037 psi | 50% | 2156 fps | 98.4% |
| Accurate 4350 | <<locked>> | 98% | 38,928 psi | 65% | 2395 fps | 95.6% |
| Accurate LT-30 | <<locked>> | 80% | 47,601 psi | 79% | 2326 fps | 100% |
| Accurate LT-32 | <<locked>> | 80% | 47,993 psi | 80% | 2346 fps | 100% |
| ADI AR 2206H | <<locked>> | 80% | 36,056 psi | 60% | 2257 fps | 96.1% |
| ADI AR 2208 | <<locked>> | 86% | 36,825 psi | 61% | 2257 fps | 95.4% |
| ADI AR 2219 | <<locked>> | 80% | 46,963 psi | 78% | 2425 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 80% | 38,014 psi | 63% | 2270 fps | 97.9% |
| Alliant AR-Comp | <<locked>> | 80% | 36,564 psi | 61% | 2277 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 43,758 psi | 73% | 2441 fps | 98.6% |
| Alliant Power Pro 2000-MR | 41.4 gr | 86% | 39,407 psi | 65% | 2408 fps | 95.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 31,502 psi | 52% | 2185 fps | 95.6% |
| Alliant Reloder-10x | <<locked>> | 80% | 44,498 psi | 74% | 2343 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 36,405 psi | 60% | 2283 fps | 95.6% |
| Alliant Reloder-16 | <<locked>> | 98% | 40,176 psi | 67% | 2402 fps | 95.7% |
| Alliant Reloder-17 | <<locked>> | 88% | 33,156 psi | 55% | 2280 fps | 95% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 46,354 psi | 77% | 2326 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 37,173 psi | 62% | 2297 fps | 95% |
| Bofors RP3 | <<locked>> | 82% | 30,705 psi | 51% | 2182 fps | 95.4% |
| Hodgdon Benchmark | <<locked>> | 80% | 40,074 psi | 67% | 2267 fps | 98.7% |
| Hodgdon BL-C2 | <<locked>> | 80% | 35,665 psi | 59% | 2280 fps | 97.9% |
| Hodgdon CFE223 | 39.4 gr | 80% | 39,189 psi | 65% | 2388 fps | 96.4% |
| Hodgdon H322 | <<locked>> | 80% | 43,033 psi | 71% | 2365 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 43,598 psi | 72% | 2385 fps | 100% |
| Hodgdon H380 | <<locked>> | 90% | 41,611 psi | 69% | 2375 fps | 95.6% |
| Hodgdon H4895 | <<locked>> | 80% | 36,289 psi | 60% | 2267 fps | 96.8% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 34,548 psi | 57% | 2260 fps | 95.8% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 32,300 psi | 54% | 2228 fps | 95.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,556 psi | 42% | 1335 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 34,795 psi | 58% | 2221 fps | 96.2% |
| IMR 3031 | <<locked>> | 80% | 34,737 psi | 58% | 2270 fps | 99.9% |
| IMR 4064 | <<locked>> | 84% | 36,550 psi | 61% | 2244 fps | 95.6% |
| IMR 4166 Enduron | <<locked>> | 92% | 50,546 psi | 84% | 2444 fps | 95.1% |
| IMR 4198 | <<locked>> | 80% | 45,310 psi | 75% | 2313 fps | 100% |
| IMR 4831 | <<locked>> | 98% | 37,797 psi | 63% | 2352 fps | 95.2% |
| IMR 4895 | <<locked>> | 80% | 32,735 psi | 54% | 2218 fps | 95% |
| IMR 8208 XBR | <<locked>> | 80% | 38,014 psi | 63% | 2270 fps | 97.9% |
| Lovex D073.5 | <<locked>> | 80% | 42,163 psi | 70% | 2343 fps | 99.3% |
| Lovex D073.6 | <<locked>> | 80% | 34,084 psi | 57% | 2238 fps | 98.5% |
| Lovex S060 | <<locked>> | 80% | 37,043 psi | 62% | 2211 fps | 96.3% |
| Lovex S062 | <<locked>> | 80% | 31,792 psi | 53% | 2159 fps | 96.2% |
| Lovex S065 | <<locked>> | 98% | 44,831 psi | 74% | 2402 fps | 95.4% |
| Norma 200 | <<locked>> | 80% | 50,314 psi | 84% | 2402 fps | 100% |
| Norma 201 | <<locked>> | 80% | 35,360 psi | 59% | 2221 fps | 97.3% |
| Norma 202 | <<locked>> | 80% | 35,288 psi | 59% | 2234 fps | 99.2% |
| Norma 203B | <<locked>> | 82% | 33,533 psi | 56% | 2228 fps | 95.2% |
| Norma URP | <<locked>> | 98% | 39,871 psi | 66% | 2395 fps | 95.6% |
| Ramshot Big Game | <<locked>> | 84% | 35,099 psi | 58% | 2277 fps | 95.4% |
| Ramshot TAC | <<locked>> | 84% | 42,902 psi | 71% | 2356 fps | 95.1% |
| Ramshot Wild Boar | <<locked>> | 80% | 36,593 psi | 61% | 2277 fps | 96.1% |
| Ramshot X-Terminator | <<locked>> | 80% | 41,118 psi | 68% | 2310 fps | 97.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 25,628 psi | 43% | 1368 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 42,656 psi | 71% | 2352 fps | 99.6% |
| ReloadSwiss RS 50 | <<locked>> | 94% | 48,138 psi | 80% | 2451 fps | 95.3% |
| ReloadSwiss RS 52 | 38.3 gr | 82% | 35,114 psi | 58% | 2316 fps | 95% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 29,283 psi | 49% | 2188 fps | 95.9% |
| ReloadSwiss RS 62 | <<locked>> | 98% | 39,218 psi | 65% | 2408 fps | 95% |
| Rottweil R 901 | <<locked>> | 80% | 39,117 psi | 65% | 2270 fps | 99.5% |
| Rottweil R 902 | <<locked>> | 80% | 33,692 psi | 56% | 2175 fps | 96.7% |
| Rottweil R 903 | <<locked>> | 84% | 30,850 psi | 51% | 2178 fps | 95.1% |
| Shooters World Long Rifle | <<locked>> | 98% | 44,831 psi | 74% | 2402 fps | 95.4% |
| Shooters World Match Rifle | <<locked>> | 80% | 34,084 psi | 57% | 2238 fps | 98.5% |
| Shooters World Precision | <<locked>> | 80% | 31,792 psi | 53% | 2159 fps | 96.2% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 44,933 psi | 75% | 2359 fps | 98.9% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 47,384 psi | 79% | 2434 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 34,301 psi | 57% | 2264 fps | 95.2% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 45,237 psi | 75% | 2359 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 84% | 40,669 psi | 68% | 2326 fps | 95.1% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 34,403 psi | 57% | 2221 fps | 95.4% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 37,086 psi | 62% | 2192 fps | 99.4% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 30,255 psi | 50% | 2073 fps | 98.8% |
| Somchem S321 | <<locked>> | 80% | 40,393 psi | 67% | 2339 fps | 98.7% |
| Somchem S335 | <<locked>> | 80% | 36,550 psi | 61% | 2198 fps | 99.7% |
| Somchem S341 | <<locked>> | 80% | 35,259 psi | 59% | 2234 fps | 95.6% |
| Somchem S355 | <<locked>> | 84% | 31,894 psi | 53% | 2182 fps | 95.2% |
| Somchem S365 | <<locked>> | 92% | 29,573 psi | 49% | 2205 fps | 95.3% |
| Vihtavuori N130 | <<locked>> | 80% | 42,090 psi | 70% | 2264 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 37,086 psi | 62% | 2198 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 32,256 psi | 54% | 2175 fps | 99.9% |
| Vihtavuori N140 | <<locked>> | 80% | 33,344 psi | 55% | 2178 fps | 99.1% |
| Vihtavuori N150 | <<locked>> | 82% | 28,543 psi | 47% | 2090 fps | 95.5% |
| Vihtavuori N160 | <<locked>> | 96% | 39,523 psi | 66% | 2352 fps | 95.3% |
| Vihtavuori N530 | <<locked>> | 80% | 37,840 psi | 63% | 2267 fps | 97.9% |
| Vihtavuori N540 | <<locked>> | 80% | 31,821 psi | 53% | 2162 fps | 98.3% |
| Vihtavuori N550 | <<locked>> | 98% | 41,089 psi | 68% | 2402 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 33,460 psi | 56% | 2198 fps | 95.3% |
| Winchester 748 | <<locked>> | 80% | 36,593 psi | 61% | 2300 fps | 98.4% |
| Winchester StaBALL Match | <<locked>> | 80% | 33,460 psi | 56% | 2221 fps | 95.9% |
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 | Berger Classic Hybrid Hunter. ReloadSwiss RS 60 delivers the highest muzzle velocity at 2,651 fps; across all powders the maximum-charge window runs from 1,496 fps to 2,651 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 57–90 %, leaving at least 10 % headroom. The 185.0 gr projectile in 0.308" calls for a 1:12.5 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, Hodgdon CFE223 rank at the top here: for .308 Win. Ackley Improved with the .308 | 185gr | Berger Classic Hybrid Hunter 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.