Load Specifications
Load data in caliber .308 Win. Ackley Improved with .308 | 190gr | Speer TB 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.
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>> | 90% | 52,895 psi | 88% | 2405 fps | 100% |
| Accurate 2200 | <<locked>> | 82% | 53,505 psi | 89% | 2490 fps | 98.9% |
| Accurate 2230 | <<locked>> | 82% | 54,085 psi | 90% | 2497 fps | 99.2% |
| Accurate 2460 | <<locked>> | 86% | 51,430 psi | 85% | 2428 fps | 100% |
| Accurate 2495 | <<locked>> | 96% | 53,011 psi | 88% | 2461 fps | 100% |
| Accurate 2520 | <<locked>> | 90% | 52,504 psi | 87% | 2480 fps | 100% |
| Accurate 4064 | <<locked>> | 98% | 52,373 psi | 87% | 2493 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 41,495 psi | 69% | 2398 fps | 96.5% |
| Accurate LT-30 | <<locked>> | 84% | 53,766 psi | 89% | 2362 fps | 100% |
| Accurate LT-32 | <<locked>> | 84% | 54,201 psi | 90% | 2382 fps | 100% |
| ADI AR 2206H | <<locked>> | 92% | 51,793 psi | 86% | 2480 fps | 99.3% |
| ADI AR 2208 | <<locked>> | 98% | 52,721 psi | 88% | 2477 fps | 98.9% |
| ADI AR 2219 | <<locked>> | 84% | 53,476 psi | 89% | 2467 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 90% | 51,605 psi | 86% | 2451 fps | 99.8% |
| Alliant AR-Comp | <<locked>> | 92% | 53,853 psi | 89% | 2470 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 86% | 52,750 psi | 88% | 2536 fps | 99.7% |
| Alliant Power Pro 2000-MR | <<locked>> | 94% | 50,981 psi | 85% | 2572 fps | 98.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 98% | 51,706 psi | 86% | 2497 fps | 99.7% |
| Alliant Reloder-10x | <<locked>> | 86% | 53,359 psi | 89% | 2415 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 96% | 52,634 psi | 87% | 2513 fps | 99.1% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 42,496 psi | 71% | 2405 fps | 96.6% |
| Alliant Reloder-17ᴾ | <<locked>> | 100% | 48,602 psi | 81% | 2539 fps | 99.3% |
| Baschieri & Pellagri 106 | <<locked>> | 84% | 52,286 psi | 87% | 2362 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 92% | 51,271 psi | 85% | 2493 fps | 98.4% |
| Bofors RP3 | <<locked>> | 98% | 51,866 psi | 86% | 2510 fps | 99.8% |
| Hodgdon Benchmark | <<locked>> | 90% | 54,041 psi | 90% | 2438 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 92% | 53,200 psi | 88% | 2520 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 88% | 51,430 psi | 85% | 2552 fps | 99% |
| Hodgdon H322 | <<locked>> | 86% | 52,301 psi | 87% | 2451 fps | 100% |
| Hodgdon H335 | <<locked>> | 86% | 53,142 psi | 88% | 2474 fps | 100% |
| Hodgdon H380 | <<locked>> | 98% | 53,490 psi | 89% | 2516 fps | 98.2% |
| Hodgdon H4895 | <<locked>> | 92% | 52,170 psi | 87% | 2490 fps | 99.6% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 38,653 psi | 64% | 2303 fps | 97.2% |
| Hodgdon LEVERevolution | <<locked>> | 96% | 53,998 psi | 90% | 2566 fps | 99.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,316 psi | 57% | 1463 fps | 100% |
| Hodgdon VARGET | <<locked>> | 94% | 53,896 psi | 90% | 2497 fps | 99.7% |
| IMR 3031 | <<locked>> | 94% | 54,447 psi | 90% | 2523 fps | 100% |
| IMR 4064 | <<locked>> | 96% | 52,475 psi | 87% | 2464 fps | 99% |
| IMR 4166 Enduron | <<locked>> | 94% | 53,345 psi | 89% | 2441 fps | 95.8% |
| IMR 4198 | <<locked>> | 86% | 53,853 psi | 89% | 2379 fps | 100% |
| IMR 4831ᴾ | <<locked>> | 100% | 40,132 psi | 67% | 2352 fps | 96.1% |
| IMR 4895 | <<locked>> | 96% | 53,911 psi | 90% | 2543 fps | 99.5% |
| IMR 8208 XBR | <<locked>> | 90% | 51,605 psi | 86% | 2451 fps | 99.8% |
| Lovex D073.5 | <<locked>> | 86% | 51,503 psi | 86% | 2438 fps | 100% |
| Lovex D073.6 | <<locked>> | 94% | 54,085 psi | 90% | 2510 fps | 100% |
| Lovex S060 | <<locked>> | 92% | 52,475 psi | 87% | 2421 fps | 99.3% |
| Lovex S062 | <<locked>> | 96% | 51,764 psi | 86% | 2464 fps | 99.8% |
| Lovex S065ᴾ | <<locked>> | 100% | 47,471 psi | 79% | 2402 fps | 96.2% |
| Norma 200 | <<locked>> | 82% | 53,287 psi | 89% | 2392 fps | 100% |
| Norma 201 | <<locked>> | 94% | 53,911 psi | 90% | 2480 fps | 99.9% |
| Norma 202 | <<locked>> | 92% | 51,039 psi | 85% | 2448 fps | 100% |
| Norma 203B | <<locked>> | 96% | 51,677 psi | 86% | 2503 fps | 99.3% |
| Norma URPᴾ | <<locked>> | 100% | 42,250 psi | 70% | 2395 fps | 96.4% |
| Ramshot Big Game | <<locked>> | 96% | 52,141 psi | 87% | 2530 fps | 99.2% |
| Ramshot TAC | <<locked>> | 90% | 52,098 psi | 87% | 2457 fps | 97.3% |
| Ramshot Wild Boar | <<locked>> | 92% | 54,186 psi | 90% | 2520 fps | 99.4% |
| Ramshot X-Terminator | <<locked>> | 88% | 52,924 psi | 88% | 2451 fps | 99.2% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 34,621 psi | 58% | 1499 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 86% | 51,532 psi | 86% | 2441 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 98% | 54,375 psi | 90% | 2497 fps | 96.8% |
| ReloadSwiss RS 52 | <<locked>> | 94% | 52,214 psi | 87% | 2572 fps | 99.1% |
| ReloadSwiss RS 60ᴾ | <<locked>> | 100% | 52,011 psi | 86% | 2598 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 41,713 psi | 69% | 2415 fps | 96% |
| Rottweil R 901 | <<locked>> | 90% | 52,127 psi | 87% | 2428 fps | 100% |
| Rottweil R 902 | <<locked>> | 96% | 54,331 psi | 90% | 2477 fps | 99.9% |
| Rottweil R 903ᴾ | <<locked>> | 100% | 51,372 psi | 85% | 2497 fps | 99.6% |
| Shooters World Long Rifleᴾ | <<locked>> | 100% | 47,471 psi | 79% | 2402 fps | 96.2% |
| Shooters World Match Rifle | <<locked>> | 94% | 54,085 psi | 90% | 2510 fps | 100% |
| Shooters World Precision | <<locked>> | 96% | 51,764 psi | 86% | 2464 fps | 99.8% |
| Shooters World Tactical Rifle | <<locked>> | 84% | 51,111 psi | 85% | 2405 fps | 99.6% |
| SNPE Vectan SP 10 | <<locked>> | 84% | 54,099 psi | 90% | 2480 fps | 100% |
| SNPE Vectan SP 11ᴾ | <<locked>> | 100% | 53,345 psi | 89% | 2552 fps | 99.4% |
| SNPE Vectan SP 3 | <<locked>> | 86% | 54,331 psi | 90% | 2431 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 92% | 53,243 psi | 88% | 2480 fps | 98% |
| SNPE Vectan SP 9 | <<locked>> | 94% | 53,708 psi | 89% | 2503 fps | 99.4% |
| SNPE Vectan Tubal 3000 | <<locked>> | 92% | 53,432 psi | 89% | 2398 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 98% | 52,286 psi | 87% | 2388 fps | 100% |
| Somchem S321 | <<locked>> | 88% | 52,330 psi | 87% | 2480 fps | 99.9% |
| Somchem S335 | <<locked>> | 92% | 52,214 psi | 87% | 2395 fps | 100% |
| Somchem S341 | <<locked>> | 92% | 52,460 psi | 87% | 2474 fps | 99.2% |
| Somchem S355ᴾ | <<locked>> | 100% | 52,214 psi | 87% | 2497 fps | 99.6% |
| Somchem S365ᴾ | <<locked>> | 100% | 37,449 psi | 62% | 2349 fps | 98.4% |
| Vihtavuori N130 | <<locked>> | 88% | 53,301 psi | 89% | 2369 fps | 100% |
| Vihtavuori N133 | <<locked>> | 92% | 53,287 psi | 89% | 2385 fps | 100% |
| Vihtavuori N135 | <<locked>> | 96% | 52,982 psi | 88% | 2448 fps | 100% |
| Vihtavuori N140 | <<locked>> | 94% | 51,459 psi | 85% | 2428 fps | 100% |
| Vihtavuori N150ᴾ | <<locked>> | 100% | 50,459 psi | 84% | 2441 fps | 99.9% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 44,672 psi | 74% | 2398 fps | 96.8% |
| Vihtavuori N530 | <<locked>> | 90% | 51,982 psi | 86% | 2448 fps | 99.8% |
| Vihtavuori N540 | <<locked>> | 96% | 52,721 psi | 88% | 2464 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 43,323 psi | 72% | 2402 fps | 96.4% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 45,876 psi | 76% | 2388 fps | 98.8% |
| Winchester 748 | <<locked>> | 92% | 54,027 psi | 90% | 2533 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 94% | 53,200 psi | 88% | 2513 fps | 99.7% |
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% | 38,957 psi | 65% | 2208 fps | 100% |
| Accurate 2200 | <<locked>> | 80% | 50,053 psi | 83% | 2438 fps | 98.4% |
| Accurate 2230 | <<locked>> | 80% | 50,633 psi | 84% | 2451 fps | 98.8% |
| Accurate 2460 | <<locked>> | 80% | 42,076 psi | 70% | 2293 fps | 99.8% |
| Accurate 2495 | <<locked>> | 80% | 31,444 psi | 52% | 2129 fps | 99.9% |
| Accurate 2520 | <<locked>> | 80% | 37,478 psi | 62% | 2254 fps | 99.2% |
| Accurate 4064 | <<locked>> | 80% | 29,776 psi | 49% | 2113 fps | 98.5% |
| Accurate 4350 | <<locked>> | 98% | 38,624 psi | 64% | 2349 fps | 95.7% |
| Accurate LT-30 | <<locked>> | 80% | 47,659 psi | 79% | 2283 fps | 100% |
| Accurate LT-32 | <<locked>> | 80% | 47,979 psi | 80% | 2300 fps | 100% |
| ADI AR 2206H | <<locked>> | 80% | 35,853 psi | 60% | 2211 fps | 96.1% |
| ADI AR 2208 | <<locked>> | 86% | 36,767 psi | 61% | 2215 fps | 95.5% |
| ADI AR 2219 | <<locked>> | 80% | 46,804 psi | 78% | 2379 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 80% | 37,840 psi | 63% | 2228 fps | 97.9% |
| Alliant AR-Comp | <<locked>> | 80% | 36,245 psi | 60% | 2231 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 43,497 psi | 72% | 2395 fps | 98.6% |
| Alliant Power Pro 2000-MR | 40.3 gr | 86% | 39,276 psi | 65% | 2362 fps | 95.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 31,328 psi | 52% | 2142 fps | 95.7% |
| Alliant Reloder-10x | <<locked>> | 80% | 44,454 psi | 74% | 2297 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 36,056 psi | 60% | 2238 fps | 95.6% |
| Alliant Reloder-16 | <<locked>> | 96% | 37,753 psi | 63% | 2310 fps | 95% |
| Alliant Reloder-17 | <<locked>> | 88% | 33,069 psi | 55% | 2238 fps | 95.1% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 46,021 psi | 76% | 2280 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 36,956 psi | 61% | 2251 fps | 95.1% |
| Bofors RP3 | <<locked>> | 82% | 30,313 psi | 50% | 2136 fps | 95.5% |
| Hodgdon Benchmark | <<locked>> | 80% | 39,856 psi | 66% | 2224 fps | 98.8% |
| Hodgdon BL-C2 | <<locked>> | 80% | 35,621 psi | 59% | 2238 fps | 98% |
| Hodgdon CFE223 | 38.3 gr | 80% | 38,914 psi | 65% | 2343 fps | 96.4% |
| Hodgdon H322 | <<locked>> | 80% | 42,844 psi | 71% | 2320 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 43,555 psi | 72% | 2339 fps | 100% |
| Hodgdon H380 | <<locked>> | 90% | 41,176 psi | 68% | 2326 fps | 95.6% |
| Hodgdon H4895 | <<locked>> | 80% | 36,085 psi | 60% | 2221 fps | 96.8% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 32,358 psi | 54% | 2172 fps | 95% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 31,995 psi | 53% | 2182 fps | 95.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,628 psi | 43% | 1309 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 34,882 psi | 58% | 2185 fps | 96.3% |
| IMR 3031 | <<locked>> | 80% | 34,708 psi | 58% | 2228 fps | 99.9% |
| IMR 4064 | <<locked>> | 84% | 36,114 psi | 60% | 2195 fps | 95.6% |
| IMR 4166 Enduron | <<locked>> | 92% | 50,125 psi | 83% | 2395 fps | 95.1% |
| IMR 4198 | <<locked>> | 80% | 45,121 psi | 75% | 2264 fps | 100% |
| IMR 4831 | <<locked>> | 98% | 37,579 psi | 62% | 2306 fps | 95.3% |
| IMR 4895 | <<locked>> | 80% | 32,590 psi | 54% | 2175 fps | 95.1% |
| IMR 8208 XBR | <<locked>> | 80% | 37,840 psi | 63% | 2228 fps | 97.9% |
| Lovex D073.5 | <<locked>> | 80% | 41,785 psi | 69% | 2297 fps | 99.3% |
| Lovex D073.6 | <<locked>> | 80% | 33,707 psi | 56% | 2192 fps | 98.5% |
| Lovex S060 | <<locked>> | 80% | 36,782 psi | 61% | 2165 fps | 96.4% |
| Lovex S062 | <<locked>> | 80% | 31,546 psi | 52% | 2113 fps | 96.2% |
| Lovex S065 | <<locked>> | 98% | 44,585 psi | 74% | 2356 fps | 95.5% |
| Norma 200 | <<locked>> | 80% | 49,995 psi | 83% | 2352 fps | 100% |
| Norma 201 | <<locked>> | 80% | 35,143 psi | 58% | 2175 fps | 97.3% |
| Norma 202 | <<locked>> | 80% | 35,056 psi | 58% | 2192 fps | 99.2% |
| Norma 203B | <<locked>> | 82% | 33,402 psi | 55% | 2185 fps | 95.4% |
| Norma URP | <<locked>> | 98% | 39,639 psi | 66% | 2349 fps | 95.6% |
| Ramshot Big Game | <<locked>> | 84% | 34,940 psi | 58% | 2234 fps | 95.4% |
| Ramshot TAC | <<locked>> | 84% | 42,786 psi | 71% | 2313 fps | 95.2% |
| Ramshot Wild Boar | <<locked>> | 80% | 36,564 psi | 61% | 2238 fps | 96.3% |
| Ramshot X-Terminator | <<locked>> | 80% | 40,799 psi | 68% | 2264 fps | 97.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 25,730 psi | 43% | 1342 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 42,511 psi | 71% | 2306 fps | 99.6% |
| ReloadSwiss RS 50 | <<locked>> | 94% | 47,921 psi | 80% | 2405 fps | 95.4% |
| ReloadSwiss RS 52 | 37.2 gr | 82% | 34,795 psi | 58% | 2270 fps | 95.1% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 29,095 psi | 48% | 2146 fps | 96% |
| ReloadSwiss RS 62 | <<locked>> | 98% | 38,870 psi | 65% | 2362 fps | 95% |
| Rottweil R 901 | <<locked>> | 80% | 38,769 psi | 64% | 2221 fps | 99.5% |
| Rottweil R 902 | <<locked>> | 80% | 33,417 psi | 56% | 2133 fps | 96.8% |
| Rottweil R 903 | <<locked>> | 84% | 30,472 psi | 51% | 2129 fps | 95.1% |
| Shooters World Long Rifle | <<locked>> | 98% | 44,585 psi | 74% | 2356 fps | 95.5% |
| Shooters World Match Rifle | <<locked>> | 80% | 33,707 psi | 56% | 2192 fps | 98.5% |
| Shooters World Precision | <<locked>> | 80% | 31,546 psi | 52% | 2113 fps | 96.2% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 44,889 psi | 75% | 2316 fps | 98.9% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 47,340 psi | 79% | 2388 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 34,113 psi | 57% | 2221 fps | 95.2% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 45,165 psi | 75% | 2313 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 84% | 40,495 psi | 67% | 2283 fps | 95.2% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 34,287 psi | 57% | 2182 fps | 95.5% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 37,043 psi | 62% | 2152 fps | 99.4% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 30,240 psi | 50% | 2034 fps | 98.9% |
| Somchem S321 | <<locked>> | 80% | 40,059 psi | 67% | 2290 fps | 98.7% |
| Somchem S335 | <<locked>> | 80% | 36,318 psi | 60% | 2156 fps | 99.7% |
| Somchem S341 | <<locked>> | 80% | 34,998 psi | 58% | 2188 fps | 95.7% |
| Somchem S355 | <<locked>> | 84% | 31,778 psi | 53% | 2142 fps | 95.3% |
| Somchem S365 | <<locked>> | 92% | 29,269 psi | 49% | 2159 fps | 95.3% |
| Vihtavuori N130 | <<locked>> | 80% | 42,061 psi | 70% | 2221 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 37,072 psi | 62% | 2156 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 32,198 psi | 53% | 2133 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 33,127 psi | 55% | 2136 fps | 99.1% |
| Vihtavuori N150 | <<locked>> | 82% | 28,427 psi | 47% | 2051 fps | 95.6% |
| Vihtavuori N160 | <<locked>> | 96% | 39,276 psi | 65% | 2306 fps | 95.3% |
| Vihtavuori N530 | <<locked>> | 80% | 37,681 psi | 63% | 2221 fps | 98% |
| Vihtavuori N540 | <<locked>> | 80% | 31,647 psi | 53% | 2119 fps | 98.4% |
| Vihtavuori N550 | <<locked>> | 98% | 40,654 psi | 68% | 2356 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 33,286 psi | 55% | 2156 fps | 95.3% |
| Winchester 748 | <<locked>> | 80% | 36,216 psi | 60% | 2251 fps | 98.4% |
| Winchester StaBALL Match | <<locked>> | 80% | 33,402 psi | 55% | 2182 fps | 96% |
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 | 190gr | Speer TB. ReloadSwiss RS 60 delivers the highest muzzle velocity at 2,598 fps; across all powders the maximum-charge window runs from 1,463 fps to 2,598 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 190.0 gr projectile in 0.308" calls for a 1:12.0 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 | 190gr | Speer TB 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.