Load Specifications
Load data in caliber .308 Win. Ackley Improved with .308 | 200gr | MAKER 200 Grain .308 Expanding Subsonic Blackout Bullets bullet and 96 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% | 52,692 psi | 88% | 2333 fps | 100% |
| Accurate 2200 | <<locked>> | 82% | 53,432 psi | 89% | 2418 fps | 99.1% |
| Accurate 2230 | <<locked>> | 82% | 53,737 psi | 89% | 2425 fps | 99.4% |
| Accurate 2460 | <<locked>> | 86% | 50,966 psi | 85% | 2356 fps | 100% |
| Accurate 2495 | <<locked>> | 96% | 51,967 psi | 86% | 2379 fps | 100% |
| Accurate 2520 | <<locked>> | 90% | 52,315 psi | 87% | 2408 fps | 100% |
| Accurate 4064 | <<locked>> | 98% | 51,924 psi | 86% | 2418 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 40,770 psi | 68% | 2323 fps | 96.8% |
| Accurate LT-30 | <<locked>> | 84% | 53,664 psi | 89% | 2293 fps | 100% |
| Accurate LT-32 | <<locked>> | 84% | 54,085 psi | 90% | 2313 fps | 100% |
| ADI AR 2206H | <<locked>> | 92% | 51,605 psi | 86% | 2411 fps | 99.5% |
| ADI AR 2208 | <<locked>> | 98% | 52,808 psi | 88% | 2408 fps | 99.1% |
| ADI AR 2219 | <<locked>> | 84% | 53,563 psi | 89% | 2395 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 90% | 51,401 psi | 85% | 2379 fps | 99.9% |
| Alliant AR-Comp | <<locked>> | 92% | 53,664 psi | 89% | 2395 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 86% | 52,301 psi | 87% | 2461 fps | 99.8% |
| Alliant Power Pro 2000-MR | <<locked>> | 96% | 54,433 psi | 90% | 2552 fps | 99.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 98% | 51,372 psi | 85% | 2425 fps | 99.8% |
| Alliant Reloder-10x | <<locked>> | 86% | 52,997 psi | 88% | 2343 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 96% | 52,243 psi | 87% | 2441 fps | 99.3% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 42,134 psi | 70% | 2336 fps | 97% |
| Alliant Reloder-17ᴾ | <<locked>> | 100% | 48,283 psi | 80% | 2470 fps | 99.5% |
| Baschieri & Pellagri 106 | <<locked>> | 84% | 52,170 psi | 87% | 2290 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 92% | 51,111 psi | 85% | 2425 fps | 98.7% |
| Bofors RP3 | <<locked>> | 98% | 51,126 psi | 85% | 2431 fps | 99.8% |
| Hodgdon Benchmark | <<locked>> | 90% | 53,751 psi | 89% | 2365 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 92% | 52,953 psi | 88% | 2444 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 88% | 51,155 psi | 85% | 2477 fps | 99.2% |
| Hodgdon H322 | <<locked>> | 86% | 51,924 psi | 86% | 2375 fps | 100% |
| Hodgdon H335 | <<locked>> | 86% | 53,011 psi | 88% | 2402 fps | 100% |
| Hodgdon H380 | <<locked>> | 98% | 53,243 psi | 88% | 2444 fps | 98.5% |
| Hodgdon H4895 | <<locked>> | 92% | 51,996 psi | 86% | 2421 fps | 99.7% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 38,174 psi | 63% | 2238 fps | 97.6% |
| Hodgdon LEVERevolution | <<locked>> | 96% | 53,954 psi | 90% | 2493 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,084 psi | 57% | 1414 fps | 100% |
| Hodgdon VARGET | <<locked>> | 94% | 53,563 psi | 89% | 2425 fps | 99.8% |
| IMR 3031 | <<locked>> | 94% | 54,346 psi | 90% | 2451 fps | 100% |
| IMR 4064 | <<locked>> | 96% | 52,040 psi | 86% | 2392 fps | 99.2% |
| IMR 4166 Enduron | <<locked>> | 94% | 53,374 psi | 89% | 2375 fps | 96.3% |
| IMR 4198 | <<locked>> | 86% | 53,592 psi | 89% | 2303 fps | 100% |
| IMR 4451 Enduronᴾ | <<locked>> | 100% | 51,793 psi | 86% | 2385 fps | 95.9% |
| IMR 4831ᴾ | <<locked>> | 100% | 39,726 psi | 66% | 2287 fps | 96.5% |
| IMR 4895 | <<locked>> | 96% | 53,534 psi | 89% | 2467 fps | 99.7% |
| IMR 8208 XBR | <<locked>> | 90% | 51,401 psi | 85% | 2379 fps | 99.9% |
| Lovex D073.5 | <<locked>> | 86% | 50,720 psi | 84% | 2362 fps | 100% |
| Lovex D073.6 | <<locked>> | 94% | 53,606 psi | 89% | 2434 fps | 100% |
| Lovex S060 | <<locked>> | 92% | 52,286 psi | 87% | 2352 fps | 99.5% |
| Lovex S062 | <<locked>> | 98% | 54,259 psi | 90% | 2428 fps | 100% |
| Lovex S065ᴾ | <<locked>> | 100% | 47,050 psi | 78% | 2333 fps | 96.6% |
| Norma 200 | <<locked>> | 82% | 52,692 psi | 88% | 2316 fps | 100% |
| Norma 201 | <<locked>> | 94% | 53,563 psi | 89% | 2408 fps | 100% |
| Norma 202 | <<locked>> | 94% | 53,911 psi | 90% | 2415 fps | 100% |
| Norma 203B | <<locked>> | 96% | 51,314 psi | 85% | 2431 fps | 99.5% |
| Norma URPᴾ | <<locked>> | 100% | 41,945 psi | 70% | 2329 fps | 96.8% |
| Ramshot Big Game | <<locked>> | 96% | 51,706 psi | 86% | 2454 fps | 99.4% |
| Ramshot TAC | <<locked>> | 90% | 51,793 psi | 86% | 2388 fps | 97.6% |
| Ramshot Wild Boar | <<locked>> | 92% | 54,012 psi | 90% | 2451 fps | 99.6% |
| Ramshot X-Terminator | <<locked>> | 88% | 52,431 psi | 87% | 2379 fps | 99.4% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 34,345 psi | 57% | 1450 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 88% | 54,302 psi | 90% | 2405 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 98% | 54,288 psi | 90% | 2431 fps | 97.2% |
| ReloadSwiss RS 52 | <<locked>> | 94% | 51,967 psi | 86% | 2497 fps | 99.3% |
| ReloadSwiss RS 60ᴾ | <<locked>> | 100% | 51,677 psi | 86% | 2526 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 41,292 psi | 69% | 2346 fps | 96.4% |
| Rottweil R 901 | <<locked>> | 92% | 54,346 psi | 90% | 2388 fps | 100% |
| Rottweil R 902 | <<locked>> | 96% | 54,012 psi | 90% | 2405 fps | 100% |
| Rottweil R 903ᴾ | <<locked>> | 100% | 50,995 psi | 85% | 2421 fps | 99.7% |
| Shooters World Long Rifleᴾ | <<locked>> | 100% | 47,050 psi | 78% | 2333 fps | 96.6% |
| Shooters World Match Rifle | <<locked>> | 94% | 53,606 psi | 89% | 2434 fps | 100% |
| Shooters World Precision | <<locked>> | 98% | 54,259 psi | 90% | 2428 fps | 100% |
| Shooters World Tactical Rifle | <<locked>> | 84% | 50,850 psi | 84% | 2336 fps | 99.7% |
| SNPE Vectan BA6 1/2 | <<locked>> | 82% | 54,244 psi | 90% | 2073 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 84% | 53,853 psi | 89% | 2408 fps | 100% |
| SNPE Vectan SP 11ᴾ | <<locked>> | 100% | 53,055 psi | 88% | 2477 fps | 99.6% |
| SNPE Vectan SP 3 | <<locked>> | 86% | 53,838 psi | 89% | 2356 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 92% | 52,881 psi | 88% | 2408 fps | 98.3% |
| SNPE Vectan SP 9 | <<locked>> | 94% | 53,432 psi | 89% | 2431 fps | 99.6% |
| SNPE Vectan Tubal 3000 | <<locked>> | 92% | 53,084 psi | 88% | 2323 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 98% | 52,228 psi | 87% | 2320 fps | 100% |
| Somchem S321 | <<locked>> | 88% | 52,257 psi | 87% | 2408 fps | 100% |
| Somchem S335 | <<locked>> | 92% | 51,880 psi | 86% | 2323 fps | 100% |
| Somchem S341 | <<locked>> | 92% | 52,330 psi | 87% | 2405 fps | 99.4% |
| Somchem S355ᴾ | <<locked>> | 100% | 51,808 psi | 86% | 2421 fps | 99.7% |
| Somchem S365ᴾ | <<locked>> | 100% | 37,014 psi | 61% | 2280 fps | 98.7% |
| Vihtavuori N130 | <<locked>> | 88% | 53,098 psi | 88% | 2300 fps | 100% |
| Vihtavuori N133 | <<locked>> | 92% | 52,924 psi | 88% | 2313 fps | 100% |
| Vihtavuori N135 | <<locked>> | 96% | 52,765 psi | 88% | 2375 fps | 100% |
| Vihtavuori N140 | <<locked>> | 94% | 51,024 psi | 85% | 2352 fps | 100% |
| Vihtavuori N150ᴾ | <<locked>> | 100% | 50,241 psi | 83% | 2369 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 44,092 psi | 73% | 2329 fps | 97.2% |
| Vihtavuori N530 | <<locked>> | 90% | 51,750 psi | 86% | 2375 fps | 99.9% |
| Vihtavuori N540 | <<locked>> | 96% | 52,446 psi | 87% | 2395 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 43,091 psi | 72% | 2336 fps | 96.8% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 45,585 psi | 76% | 2323 fps | 99.1% |
| Winchester 748 | <<locked>> | 92% | 54,186 psi | 90% | 2461 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 94% | 53,011 psi | 88% | 2441 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% | 38,493 psi | 64% | 2139 fps | 100% |
| Accurate 2200 | <<locked>> | 80% | 49,879 psi | 83% | 2369 fps | 98.7% |
| Accurate 2230 | <<locked>> | 80% | 50,125 psi | 83% | 2375 fps | 99% |
| Accurate 2460 | <<locked>> | 80% | 41,553 psi | 69% | 2224 fps | 99.9% |
| Accurate 2495 | <<locked>> | 80% | 30,400 psi | 51% | 2054 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 36,738 psi | 61% | 2182 fps | 99.4% |
| Accurate 4064 | <<locked>> | 80% | 28,805 psi | 48% | 2037 fps | 98.6% |
| Accurate 4350 | <<locked>> | 96% | 35,418 psi | 59% | 2228 fps | 95.2% |
| Accurate LT-30 | <<locked>> | 80% | 47,297 psi | 79% | 2211 fps | 100% |
| Accurate LT-32 | <<locked>> | 80% | 47,688 psi | 79% | 2231 fps | 100% |
| ADI AR 2206H | <<locked>> | 80% | 35,360 psi | 59% | 2146 fps | 96.5% |
| ADI AR 2208 | <<locked>> | 84% | 34,127 psi | 57% | 2103 fps | 95.1% |
| ADI AR 2219 | <<locked>> | 80% | 46,673 psi | 78% | 2310 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 80% | 37,420 psi | 62% | 2159 fps | 98.2% |
| Alliant AR-Comp | <<locked>> | 80% | 36,042 psi | 60% | 2165 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 43,105 psi | 72% | 2323 fps | 98.9% |
| Alliant Power Pro 2000-MR | 38.3 gr | 84% | 36,260 psi | 60% | 2241 fps | 95.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 28,747 psi | 48% | 2028 fps | 95.2% |
| Alliant Reloder-10x | <<locked>> | 80% | 43,772 psi | 73% | 2224 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 33,344 psi | 55% | 2123 fps | 95.2% |
| Alliant Reloder-16 | <<locked>> | 96% | 37,536 psi | 62% | 2251 fps | 95.5% |
| Alliant Reloder-17 | <<locked>> | 88% | 32,445 psi | 54% | 2172 fps | 95.5% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 46,021 psi | 76% | 2215 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 36,564 psi | 61% | 2185 fps | 95.5% |
| Bofors RP3 | <<locked>> | 82% | 29,762 psi | 49% | 2067 fps | 95.8% |
| Hodgdon Benchmark | <<locked>> | 80% | 39,697 psi | 66% | 2162 fps | 99% |
| Hodgdon BL-C2 | <<locked>> | 80% | 34,969 psi | 58% | 2169 fps | 98.3% |
| Hodgdon CFE223 | 37.4 gr | 80% | 38,798 psi | 64% | 2277 fps | 96.9% |
| Hodgdon H322 | <<locked>> | 80% | 42,482 psi | 71% | 2247 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 43,033 psi | 71% | 2267 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 38,087 psi | 63% | 2211 fps | 95.2% |
| Hodgdon H4895 | <<locked>> | 80% | 35,592 psi | 59% | 2156 fps | 97.2% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 31,894 psi | 53% | 2110 fps | 95.4% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 31,604 psi | 53% | 2119 fps | 96.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,150 psi | 42% | 1260 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 34,476 psi | 57% | 2119 fps | 96.7% |
| IMR 3031 | <<locked>> | 80% | 34,185 psi | 57% | 2159 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 33,605 psi | 56% | 2087 fps | 95.3% |
| IMR 4166 Enduron | <<locked>> | 92% | 50,038 psi | 83% | 2329 fps | 95.6% |
| IMR 4198 | <<locked>> | 80% | 44,904 psi | 75% | 2195 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 98% | 48,863 psi | 81% | 2346 fps | 95.2% |
| IMR 4831 | <<locked>> | 98% | 37,072 psi | 62% | 2238 fps | 95.7% |
| IMR 4895 | <<locked>> | 80% | 32,068 psi | 53% | 2110 fps | 95.5% |
| IMR 8208 XBR | <<locked>> | 80% | 37,420 psi | 62% | 2159 fps | 98.2% |
| Lovex D073.5 | <<locked>> | 80% | 41,365 psi | 69% | 2228 fps | 99.5% |
| Lovex D073.6 | <<locked>> | 80% | 33,127 psi | 55% | 2123 fps | 98.7% |
| Lovex S060 | <<locked>> | 80% | 36,303 psi | 60% | 2100 fps | 96.7% |
| Lovex S062 | <<locked>> | 80% | 30,879 psi | 51% | 2047 fps | 96.5% |
| Lovex S065 | <<locked>> | 96% | 41,495 psi | 69% | 2244 fps | 95.2% |
| Norma 200 | <<locked>> | 80% | 49,226 psi | 82% | 2274 fps | 100% |
| Norma 201 | <<locked>> | 80% | 34,389 psi | 57% | 2106 fps | 97.6% |
| Norma 202 | <<locked>> | 80% | 34,476 psi | 57% | 2119 fps | 99.4% |
| Norma 203B | <<locked>> | 82% | 32,692 psi | 54% | 2116 fps | 95.6% |
| Norma URP | <<locked>> | 96% | 36,912 psi | 61% | 2238 fps | 95.3% |
| Ramshot Big Game | <<locked>> | 82% | 32,314 psi | 54% | 2123 fps | 95% |
| Ramshot TAC | <<locked>> | 84% | 42,438 psi | 71% | 2247 fps | 95.6% |
| Ramshot Wild Boar | <<locked>> | 80% | 36,042 psi | 60% | 2169 fps | 96.6% |
| Ramshot X-Terminator | <<locked>> | 80% | 40,582 psi | 67% | 2198 fps | 97.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 25,512 psi | 42% | 1296 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 41,872 psi | 70% | 2231 fps | 99.7% |
| ReloadSwiss RS 50 | <<locked>> | 92% | 44,556 psi | 74% | 2290 fps | 95.1% |
| ReloadSwiss RS 52 | 36.3 gr | 82% | 34,461 psi | 57% | 2205 fps | 95.5% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 26,876 psi | 45% | 2034 fps | 95.4% |
| ReloadSwiss RS 62 | <<locked>> | 98% | 38,537 psi | 64% | 2297 fps | 95.5% |
| Rottweil R 901 | <<locked>> | 80% | 38,072 psi | 63% | 2152 fps | 99.6% |
| Rottweil R 902 | <<locked>> | 80% | 32,634 psi | 54% | 2064 fps | 97% |
| Rottweil R 903 | <<locked>> | 84% | 29,921 psi | 50% | 2067 fps | 95.5% |
| Shooters World Long Rifle | <<locked>> | 96% | 41,495 psi | 69% | 2244 fps | 95.2% |
| Shooters World Match Rifle | <<locked>> | 80% | 33,127 psi | 55% | 2123 fps | 98.7% |
| Shooters World Precision | <<locked>> | 80% | 30,879 psi | 51% | 2047 fps | 96.5% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 44,411 psi | 74% | 2244 fps | 99.1% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 51,503 psi | 86% | 2044 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 46,862 psi | 78% | 2316 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 33,634 psi | 56% | 2156 fps | 95.6% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 44,686 psi | 74% | 2238 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 84% | 40,030 psi | 67% | 2218 fps | 95.6% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 33,924 psi | 56% | 2116 fps | 95.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 36,390 psi | 60% | 2083 fps | 99.5% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 29,631 psi | 49% | 1969 fps | 99.1% |
| Somchem S321 | <<locked>> | 80% | 39,784 psi | 66% | 2224 fps | 98.9% |
| Somchem S335 | <<locked>> | 80% | 35,679 psi | 59% | 2087 fps | 99.8% |
| Somchem S341 | <<locked>> | 80% | 34,766 psi | 58% | 2129 fps | 96.1% |
| Somchem S355 | <<locked>> | 84% | 31,241 psi | 52% | 2077 fps | 95.7% |
| Somchem S365 | <<locked>> | 92% | 28,761 psi | 48% | 2093 fps | 95.7% |
| Vihtavuori N130 | <<locked>> | 80% | 41,466 psi | 69% | 2149 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 36,492 psi | 61% | 2087 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 31,502 psi | 52% | 2064 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 32,605 psi | 54% | 2067 fps | 99.3% |
| Vihtavuori N150 | <<locked>> | 80% | 26,005 psi | 43% | 1939 fps | 95% |
| Vihtavuori N160 | <<locked>> | 94% | 36,550 psi | 61% | 2195 fps | 95% |
| Vihtavuori N530 | <<locked>> | 80% | 36,999 psi | 61% | 2152 fps | 98.2% |
| Vihtavuori N540 | <<locked>> | 80% | 31,198 psi | 52% | 2057 fps | 98.6% |
| Vihtavuori N550 | <<locked>> | 96% | 37,710 psi | 63% | 2241 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 32,808 psi | 55% | 2093 fps | 95.7% |
| Winchester 748 | <<locked>> | 80% | 35,911 psi | 60% | 2188 fps | 98.7% |
| Winchester StaBALL Match | <<locked>> | 80% | 32,793 psi | 54% | 2113 fps | 96.3% |
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 96 powders for .308 Win. Ackley Improved loaded with the .308 | 200gr | MAKER 200 Grain .308 Expanding Subsonic Blackout Bullets. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,552 fps; across all powders the maximum-charge window runs from 1,414 fps to 2,552 fps. Accurate 4350 gives the best case fill at 100 %, and 96 of the 96 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 1:12.0 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 | 200gr | MAKER 200 Grain .308 Expanding Subsonic Blackout Bullets 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.