Load Specifications
Load data in caliber .308 Win. Ackley Improved with .308 | 200gr | Frontier PH HPFB bullet and 98 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% | 52,431 psi | 87% | 2310 fps | 100% |
| Accurate 2200 | <<locked>> | 82% | 52,823 psi | 88% | 2388 fps | 98.9% |
| Accurate 2230 | <<locked>> | 82% | 53,447 psi | 89% | 2398 fps | 99.2% |
| Accurate 2460 | <<locked>> | 88% | 54,172 psi | 90% | 2372 fps | 100% |
| Accurate 2495 | <<locked>> | 96% | 51,967 psi | 86% | 2359 fps | 100% |
| Accurate 2520 | <<locked>> | 90% | 51,576 psi | 86% | 2379 fps | 100% |
| Accurate 4064 | <<locked>> | 98% | 51,430 psi | 85% | 2392 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 40,335 psi | 67% | 2297 fps | 96.3% |
| Accurate LT-30 | <<locked>> | 84% | 52,982 psi | 88% | 2264 fps | 100% |
| Accurate LT-32 | <<locked>> | 84% | 53,374 psi | 89% | 2283 fps | 100% |
| ADI AR 2206H | <<locked>> | 92% | 51,097 psi | 85% | 2382 fps | 99.3% |
| ADI AR 2208 | <<locked>> | 98% | 51,938 psi | 86% | 2375 fps | 98.9% |
| ADI AR 2219 | <<locked>> | 84% | 52,634 psi | 87% | 2365 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 92% | 53,896 psi | 90% | 2388 fps | 99.9% |
| Alliant AR-Comp | <<locked>> | 92% | 53,185 psi | 88% | 2372 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 86% | 51,822 psi | 86% | 2431 fps | 99.7% |
| Alliant Power Pro 2000-MR | <<locked>> | 96% | 53,795 psi | 89% | 2520 fps | 99.1% |
| Alliant Reloder- TS 15.5ᴾ | <<locked>> | 100% | 54,157 psi | 90% | 2438 fps | 99.9% |
| Alliant Reloder-10x | <<locked>> | 86% | 52,402 psi | 87% | 2313 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 96% | 51,837 psi | 86% | 2415 fps | 99% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 42,018 psi | 70% | 2310 fps | 96.6% |
| Alliant Reloder-17ᴾ | <<locked>> | 100% | 47,964 psi | 80% | 2441 fps | 99.3% |
| Baschieri & Pellagri 106 | <<locked>> | 84% | 51,938 psi | 86% | 2270 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 94% | 53,882 psi | 90% | 2438 fps | 98.9% |
| Bofors RP3ᴾ | <<locked>> | 100% | 54,259 psi | 90% | 2451 fps | 99.9% |
| Hodgdon Benchmark | <<locked>> | 90% | 53,098 psi | 88% | 2336 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 92% | 52,185 psi | 87% | 2415 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 90% | 54,186 psi | 90% | 2497 fps | 99.3% |
| Hodgdon H322 | <<locked>> | 86% | 51,430 psi | 85% | 2349 fps | 100% |
| Hodgdon H335 | <<locked>> | 86% | 52,373 psi | 87% | 2375 fps | 100% |
| Hodgdon H380 | <<locked>> | 98% | 52,649 psi | 87% | 2415 fps | 98.2% |
| Hodgdon H4895 | <<locked>> | 92% | 51,503 psi | 86% | 2392 fps | 99.6% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 38,101 psi | 63% | 2211 fps | 97.2% |
| Hodgdon LEVERevolution | <<locked>> | 96% | 53,171 psi | 88% | 2464 fps | 99.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,432 psi | 57% | 1404 fps | 100% |
| Hodgdon VARGET | <<locked>> | 94% | 52,997 psi | 88% | 2395 fps | 99.6% |
| IMR 3031 | <<locked>> | 94% | 53,548 psi | 89% | 2421 fps | 100% |
| IMR 4064 | <<locked>> | 96% | 51,488 psi | 86% | 2362 fps | 99% |
| IMR 4166 Enduron | <<locked>> | 94% | 52,634 psi | 87% | 2343 fps | 95.8% |
| IMR 4198 | <<locked>> | 86% | 53,432 psi | 89% | 2283 fps | 100% |
| IMR 4831ᴾ | <<locked>> | 100% | 39,392 psi | 65% | 2257 fps | 96.1% |
| IMR 4895 | <<locked>> | 96% | 53,127 psi | 88% | 2441 fps | 99.5% |
| IMR 8208 XBR | <<locked>> | 92% | 53,896 psi | 90% | 2388 fps | 99.9% |
| Lovex D073.4 | <<locked>> | 82% | 54,070 psi | 90% | 2379 fps | 100% |
| Lovex D073.5 | <<locked>> | 88% | 53,969 psi | 90% | 2379 fps | 100% |
| Lovex D073.6 | <<locked>> | 94% | 52,910 psi | 88% | 2405 fps | 100% |
| Lovex S060 | <<locked>> | 92% | 52,011 psi | 86% | 2326 fps | 99.3% |
| Lovex S062 | <<locked>> | 98% | 53,940 psi | 90% | 2402 fps | 99.9% |
| Lovex S065ᴾ | <<locked>> | 100% | 46,572 psi | 77% | 2303 fps | 96.1% |
| Norma 200 | <<locked>> | 82% | 52,330 psi | 87% | 2290 fps | 100% |
| Norma 201 | <<locked>> | 94% | 53,156 psi | 88% | 2379 fps | 99.9% |
| Norma 202 | <<locked>> | 94% | 53,388 psi | 89% | 2385 fps | 100% |
| Norma 203B | <<locked>> | 98% | 54,143 psi | 90% | 2444 fps | 99.6% |
| Norma URPᴾ | <<locked>> | 100% | 41,495 psi | 69% | 2300 fps | 96.4% |
| Ramshot Big Game | <<locked>> | 96% | 51,140 psi | 85% | 2425 fps | 99.2% |
| Ramshot TAC | <<locked>> | 90% | 51,198 psi | 85% | 2356 fps | 97.3% |
| Ramshot Wild Boar | <<locked>> | 92% | 53,200 psi | 88% | 2418 fps | 99.4% |
| Ramshot X-Terminator | <<locked>> | 88% | 52,069 psi | 87% | 2349 fps | 99.2% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 34,432 psi | 57% | 1434 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 88% | 53,998 psi | 90% | 2382 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 98% | 53,374 psi | 89% | 2395 fps | 96.7% |
| ReloadSwiss RS 52 | <<locked>> | 94% | 51,024 psi | 85% | 2464 fps | 99% |
| ReloadSwiss RS 60ᴾ | <<locked>> | 100% | 51,242 psi | 85% | 2497 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 40,770 psi | 68% | 2313 fps | 95.8% |
| Rottweil R 901 | <<locked>> | 92% | 54,317 psi | 90% | 2365 fps | 100% |
| Rottweil R 902 | <<locked>> | 96% | 53,635 psi | 89% | 2379 fps | 99.9% |
| Rottweil R 903ᴾ | <<locked>> | 100% | 50,415 psi | 84% | 2395 fps | 99.6% |
| Shooters World AR Plus | <<locked>> | 82% | 54,070 psi | 90% | 2379 fps | 100% |
| Shooters World Long Rifleᴾ | <<locked>> | 100% | 46,572 psi | 77% | 2303 fps | 96.1% |
| Shooters World Match Rifle | <<locked>> | 94% | 52,910 psi | 88% | 2405 fps | 100% |
| Shooters World Precision | <<locked>> | 98% | 53,940 psi | 90% | 2402 fps | 99.9% |
| Shooters World Tactical Rifle | <<locked>> | 86% | 54,230 psi | 90% | 2356 fps | 99.8% |
| SNPE Vectan BA6 1/2 | <<locked>> | 82% | 54,230 psi | 90% | 2057 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 84% | 53,185 psi | 88% | 2379 fps | 100% |
| SNPE Vectan SP 11ᴾ | <<locked>> | 100% | 52,446 psi | 87% | 2448 fps | 99.4% |
| SNPE Vectan SP 3 | <<locked>> | 86% | 53,476 psi | 89% | 2333 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 92% | 52,315 psi | 87% | 2379 fps | 97.9% |
| SNPE Vectan SP 9 | <<locked>> | 94% | 52,721 psi | 88% | 2402 fps | 99.4% |
| SNPE Vectan Tubal 3000 | <<locked>> | 92% | 52,721 psi | 88% | 2300 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 98% | 51,619 psi | 86% | 2293 fps | 100% |
| Somchem S321 | <<locked>> | 88% | 51,459 psi | 85% | 2379 fps | 99.9% |
| Somchem S335 | <<locked>> | 92% | 51,387 psi | 85% | 2297 fps | 100% |
| Somchem S341 | <<locked>> | 92% | 51,590 psi | 86% | 2375 fps | 99.2% |
| Somchem S355ᴾ | <<locked>> | 100% | 51,227 psi | 85% | 2392 fps | 99.5% |
| Somchem S365ᴾ | <<locked>> | 100% | 36,825 psi | 61% | 2254 fps | 98.4% |
| Vihtavuori N120 | <<locked>> | 82% | 54,433 psi | 90% | 2234 fps | 100% |
| Vihtavuori N130 | <<locked>> | 88% | 52,634 psi | 87% | 2274 fps | 100% |
| Vihtavuori N133 | <<locked>> | 92% | 52,562 psi | 87% | 2287 fps | 100% |
| Vihtavuori N135 | <<locked>> | 96% | 52,054 psi | 86% | 2349 fps | 100% |
| Vihtavuori N140 | <<locked>> | 96% | 54,099 psi | 90% | 2369 fps | 100% |
| Vihtavuori N150ᴾ | <<locked>> | 100% | 49,661 psi | 83% | 2339 fps | 99.9% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 43,642 psi | 73% | 2297 fps | 96.7% |
| Vihtavuori N530 | <<locked>> | 92% | 54,418 psi | 90% | 2388 fps | 99.9% |
| Vihtavuori N540 | <<locked>> | 96% | 51,808 psi | 86% | 2365 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 42,496 psi | 71% | 2303 fps | 96.4% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 45,208 psi | 75% | 2293 fps | 98.8% |
| Winchester 748 | <<locked>> | 92% | 53,243 psi | 88% | 2431 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 94% | 52,330 psi | 87% | 2411 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% | 38,493 psi | 64% | 2119 fps | 100% |
| Accurate 2200 | <<locked>> | 80% | 49,647 psi | 82% | 2343 fps | 98.5% |
| Accurate 2230 | <<locked>> | 80% | 49,806 psi | 83% | 2349 fps | 98.8% |
| Accurate 2460 | <<locked>> | 80% | 41,510 psi | 69% | 2201 fps | 99.9% |
| Accurate 2495 | <<locked>> | 80% | 30,850 psi | 51% | 2044 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 36,956 psi | 61% | 2162 fps | 99.2% |
| Accurate 4064 | <<locked>> | 80% | 29,240 psi | 49% | 2024 fps | 98.5% |
| Accurate 4350 | <<locked>> | 98% | 37,739 psi | 63% | 2251 fps | 95.6% |
| Accurate LT-30 | <<locked>> | 80% | 46,905 psi | 78% | 2188 fps | 100% |
| Accurate LT-32 | <<locked>> | 80% | 47,282 psi | 79% | 2205 fps | 100% |
| ADI AR 2206H | <<locked>> | 80% | 35,418 psi | 59% | 2123 fps | 96.2% |
| ADI AR 2208 | <<locked>> | 86% | 36,289 psi | 60% | 2126 fps | 95.6% |
| ADI AR 2219 | <<locked>> | 80% | 46,093 psi | 77% | 2280 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 80% | 37,391 psi | 62% | 2139 fps | 98% |
| Alliant AR-Comp | <<locked>> | 80% | 35,839 psi | 60% | 2142 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 42,902 psi | 71% | 2297 fps | 98.7% |
| Alliant Power Pro 2000-MR | 38 gr | 86% | 38,725 psi | 64% | 2267 fps | 95.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 30,690 psi | 51% | 2054 fps | 95.7% |
| Alliant Reloder-10x | <<locked>> | 80% | 43,859 psi | 73% | 2205 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 35,592 psi | 59% | 2149 fps | 95.7% |
| Alliant Reloder-16 | <<locked>> | 98% | 39,624 psi | 66% | 2264 fps | 95.8% |
| Alliant Reloder-17 | <<locked>> | 88% | 32,663 psi | 54% | 2152 fps | 95.2% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 45,687 psi | 76% | 2192 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 36,463 psi | 61% | 2162 fps | 95.1% |
| Bofors RP3 | <<locked>> | 82% | 30,037 psi | 50% | 2054 fps | 95.6% |
| Hodgdon Benchmark | <<locked>> | 80% | 39,320 psi | 65% | 2133 fps | 98.8% |
| Hodgdon BL-C2 | <<locked>> | 80% | 34,911 psi | 58% | 2146 fps | 98% |
| Hodgdon CFE223 | 36.1 gr | 80% | 38,319 psi | 64% | 2247 fps | 96.5% |
| Hodgdon H322 | <<locked>> | 80% | 42,264 psi | 70% | 2224 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 42,757 psi | 71% | 2244 fps | 100% |
| Hodgdon H380 | <<locked>> | 90% | 40,538 psi | 67% | 2231 fps | 95.6% |
| Hodgdon H4895 | <<locked>> | 80% | 35,607 psi | 59% | 2133 fps | 96.9% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 31,836 psi | 53% | 2083 fps | 95% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 31,531 psi | 52% | 2093 fps | 95.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,541 psi | 42% | 1253 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 34,156 psi | 57% | 2090 fps | 96.3% |
| IMR 3031 | <<locked>> | 80% | 34,040 psi | 57% | 2136 fps | 99.9% |
| IMR 4064 | <<locked>> | 84% | 35,766 psi | 59% | 2110 fps | 95.7% |
| IMR 4166 Enduron | <<locked>> | 92% | 49,617 psi | 82% | 2300 fps | 95.1% |
| IMR 4198 | <<locked>> | 80% | 44,628 psi | 74% | 2172 fps | 100% |
| IMR 4831 | <<locked>> | 98% | 36,796 psi | 61% | 2211 fps | 95.2% |
| IMR 4895 | <<locked>> | 80% | 32,140 psi | 53% | 2090 fps | 95.2% |
| IMR 8208 XBR | <<locked>> | 80% | 37,391 psi | 62% | 2139 fps | 98% |
| Lovex D073.4 | <<locked>> | 80% | 50,386 psi | 84% | 2333 fps | 100% |
| Lovex D073.5 | <<locked>> | 80% | 41,365 psi | 69% | 2208 fps | 99.4% |
| Lovex D073.6 | <<locked>> | 80% | 33,344 psi | 55% | 2106 fps | 98.6% |
| Lovex S060 | <<locked>> | 80% | 36,535 psi | 61% | 2080 fps | 96.5% |
| Lovex S062 | <<locked>> | 80% | 31,241 psi | 52% | 2031 fps | 96.3% |
| Lovex S065 | <<locked>> | 98% | 43,888 psi | 73% | 2260 fps | 95.5% |
| Norma 200 | <<locked>> | 80% | 49,240 psi | 82% | 2254 fps | 100% |
| Norma 201 | <<locked>> | 80% | 34,577 psi | 57% | 2087 fps | 97.4% |
| Norma 202 | <<locked>> | 80% | 34,490 psi | 57% | 2100 fps | 99.2% |
| Norma 203B | <<locked>> | 82% | 32,851 psi | 55% | 2096 fps | 95.4% |
| Norma URP | <<locked>> | 98% | 39,073 psi | 65% | 2257 fps | 95.6% |
| Ramshot Big Game | <<locked>> | 84% | 34,563 psi | 57% | 2146 fps | 95.5% |
| Ramshot TAC | <<locked>> | 84% | 42,119 psi | 70% | 2218 fps | 95.2% |
| Ramshot Wild Boar | <<locked>> | 80% | 35,897 psi | 60% | 2146 fps | 96.3% |
| Ramshot X-Terminator | <<locked>> | 80% | 40,408 psi | 67% | 2175 fps | 97.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 25,657 psi | 43% | 1283 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 41,785 psi | 69% | 2211 fps | 99.6% |
| ReloadSwiss RS 50 | <<locked>> | 94% | 47,036 psi | 78% | 2306 fps | 95.4% |
| ReloadSwiss RS 52 | 35.1 gr | 82% | 34,345 psi | 57% | 2178 fps | 95.1% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 26,992 psi | 45% | 2014 fps | 95% |
| ReloadSwiss RS 62 | <<locked>> | 98% | 38,363 psi | 64% | 2270 fps | 95.1% |
| Rottweil R 901 | <<locked>> | 80% | 38,334 psi | 64% | 2133 fps | 99.6% |
| Rottweil R 902 | <<locked>> | 80% | 33,069 psi | 55% | 2051 fps | 96.9% |
| Rottweil R 903 | <<locked>> | 84% | 29,994 psi | 50% | 2044 fps | 95.2% |
| Shooters World AR Plus | <<locked>> | 80% | 50,386 psi | 84% | 2333 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 98% | 43,888 psi | 73% | 2260 fps | 95.5% |
| Shooters World Match Rifle | <<locked>> | 80% | 33,344 psi | 55% | 2106 fps | 98.6% |
| Shooters World Precision | <<locked>> | 80% | 31,241 psi | 52% | 2031 fps | 96.3% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 44,150 psi | 73% | 2218 fps | 98.9% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 51,401 psi | 85% | 2024 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 46,543 psi | 77% | 2290 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 33,663 psi | 56% | 2136 fps | 95.3% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 44,628 psi | 74% | 2218 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 84% | 39,755 psi | 66% | 2188 fps | 95.2% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 33,750 psi | 56% | 2090 fps | 95.5% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 36,608 psi | 61% | 2064 fps | 99.4% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 29,820 psi | 50% | 1955 fps | 98.9% |
| Somchem S321 | <<locked>> | 80% | 39,682 psi | 66% | 2201 fps | 98.7% |
| Somchem S335 | <<locked>> | 80% | 35,752 psi | 59% | 2067 fps | 99.7% |
| Somchem S341 | <<locked>> | 80% | 34,679 psi | 58% | 2106 fps | 95.8% |
| Somchem S355 | <<locked>> | 84% | 31,430 psi | 52% | 2060 fps | 95.4% |
| Somchem S365 | <<locked>> | 92% | 28,834 psi | 48% | 2073 fps | 95.3% |
| Vihtavuori N120 | <<locked>> | 80% | 51,198 psi | 85% | 2198 fps | 100% |
| Vihtavuori N130 | <<locked>> | 80% | 41,582 psi | 69% | 2129 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 36,593 psi | 61% | 2067 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 31,720 psi | 53% | 2047 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 32,634 psi | 54% | 2051 fps | 99.1% |
| Vihtavuori N150 | <<locked>> | 82% | 27,862 psi | 46% | 1965 fps | 95.5% |
| Vihtavuori N160 | <<locked>> | 96% | 38,711 psi | 64% | 2211 fps | 95.3% |
| Vihtavuori N530 | <<locked>> | 80% | 36,985 psi | 61% | 2129 fps | 98% |
| Vihtavuori N540 | <<locked>> | 80% | 31,343 psi | 52% | 2037 fps | 98.4% |
| Vihtavuori N550 | <<locked>> | 98% | 39,972 psi | 66% | 2260 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 32,663 psi | 54% | 2067 fps | 95.2% |
| Winchester 748 | <<locked>> | 80% | 35,694 psi | 59% | 2162 fps | 98.5% |
| Winchester StaBALL Match | <<locked>> | 80% | 32,938 psi | 55% | 2096 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 98 powders for .308 Win. Ackley Improved loaded with the .308 | 200gr | Frontier PH HPFB. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,520 fps; across all powders the maximum-charge window runs from 1,404 fps to 2,520 fps. Accurate 4350 gives the best case fill at 100 %, and 98 of the 98 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 200.0 gr projectile in 0.308" calls for a 1:11.0 twist; slower twists will usually not stabilise this weight. Accurate 4350, Alliant Reloder- TS 15.5, Alliant Reloder-16 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 | 200gr | Frontier PH HPFB 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.