Load Specifications
Bullet Manufacturer:Sierra
Bullet Weight:205 gr
Bullet Diameter:0.308"
Bullet Length:<<locked>>
Case Length (l3):2.014"
Cartridge Length (C.O.L.):<<locked>>
Case Capacity:59 Grains of Water
Primer Size:Large Rifle (LR)
Barrel Length:24"
Max. allowed Pressure:60,191 psi
Recommended Twist Rate:1:13.0
Load data in caliber .308 Win. Ackley Improved with .308 | 205gr | Sierra GameKing bullet and 105 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 60 and ReloadSwiss RS 52.
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% | 53,809 psi | 89% | 2326 fps | 100% |
| Accurate 2460 | <<locked>> | 84% | 52,083 psi | 87% | 2349 fps | 100% |
| Accurate 2495 | <<locked>> | 92% | 50,981 psi | 85% | 2343 fps | 100% |
| Accurate 2520 | <<locked>> | 88% | 53,722 psi | 89% | 2405 fps | 100% |
| Accurate 2700 | <<locked>> | 92% | 51,750 psi | 86% | 2336 fps | 95.7% |
| Accurate 4064 | <<locked>> | 96% | 54,230 psi | 90% | 2421 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 46,122 psi | 77% | 2392 fps | 98.4% |
| Accurate LT-30 | <<locked>> | 82% | 53,664 psi | 89% | 2277 fps | 100% |
| Accurate LT-32 | <<locked>> | 82% | 54,099 psi | 90% | 2300 fps | 100% |
| ADI AR 2206H | <<locked>> | 90% | 52,692 psi | 88% | 2411 fps | 99.8% |
| ADI AR 2208 | <<locked>> | 96% | 53,780 psi | 89% | 2408 fps | 99.6% |
| ADI AR 2219 | <<locked>> | 82% | 54,346 psi | 90% | 2385 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 88% | 52,373 psi | 87% | 2375 fps | 100% |
| Alliant AR-Comp | <<locked>> | 88% | 52,112 psi | 87% | 2356 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 84% | 53,882 psi | 90% | 2464 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 92% | 51,793 psi | 86% | 2507 fps | 99.5% |
| Alliant Power Pro Varmint | <<locked>> | 90% | 53,287 psi | 89% | 2421 fps | 99.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 96% | 52,823 psi | 88% | 2425 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 84% | 53,751 psi | 89% | 2329 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 94% | 53,650 psi | 89% | 2444 fps | 99.7% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 46,296 psi | 77% | 2402 fps | 98.6% |
| Alliant Reloder-17ᴾ | <<locked>> | 100% | 53,113 psi | 88% | 2526 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 32,445 psi | 54% | 2165 fps | 96.1% |
| Baschieri & Pellagri 106 | <<locked>> | 82% | 52,765 psi | 88% | 2283 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 90% | 52,272 psi | 87% | 2425 fps | 99.3% |
| Bofors RP3 | <<locked>> | 96% | 53,127 psi | 88% | 2441 fps | 100% |
| Bofors RP7ᴾ | <<locked>> | 100% | 54,070 psi | 90% | 2405 fps | 96.6% |
| Hodgdon Benchmark | <<locked>> | 86% | 51,343 psi | 85% | 2320 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 90% | 54,302 psi | 90% | 2444 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 86% | 52,257 psi | 87% | 2477 fps | 99.6% |
| Hodgdon H322 | <<locked>> | 84% | 52,808 psi | 88% | 2369 fps | 100% |
| Hodgdon H335 | <<locked>> | 84% | 53,635 psi | 89% | 2392 fps | 100% |
| Hodgdon H380 | <<locked>> | 94% | 51,430 psi | 85% | 2408 fps | 98.7% |
| Hodgdon H414ᴾ | <<locked>> | 100% | 49,850 psi | 83% | 2438 fps | 96.6% |
| Hodgdon H4895 | <<locked>> | 90% | 53,113 psi | 88% | 2418 fps | 99.9% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 42,438 psi | 71% | 2300 fps | 99% |
| Hodgdon LEVERevolution | <<locked>> | 92% | 51,793 psi | 86% | 2448 fps | 100% |
| Hodgdon Superformanceᴾ | <<locked>> | 100% | 51,097 psi | 85% | 2464 fps | 96% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,925 psi | 58% | 1424 fps | 100% |
| Hodgdon VARGET | <<locked>> | 90% | 51,314 psi | 85% | 2379 fps | 99.8% |
| IMR 3031 | <<locked>> | 90% | 52,620 psi | 87% | 2408 fps | 100% |
| IMR 4064 | <<locked>> | 94% | 53,243 psi | 88% | 2392 fps | 99.6% |
| IMR 4166 Enduron | <<locked>> | 92% | 53,795 psi | 89% | 2372 fps | 97.1% |
| IMR 4198 | <<locked>> | 84% | 54,447 psi | 90% | 2293 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 98% | 52,910 psi | 88% | 2392 fps | 96.8% |
| IMR 4831ᴾ | <<locked>> | 100% | 44,106 psi | 73% | 2343 fps | 98.1% |
| IMR 4895 | <<locked>> | 92% | 51,590 psi | 86% | 2428 fps | 99.8% |
| IMR 8208 XBR | <<locked>> | 88% | 52,373 psi | 87% | 2375 fps | 100% |
| Lovex D073.5 | <<locked>> | 84% | 52,156 psi | 87% | 2362 fps | 100% |
| Lovex D073.6 | <<locked>> | 90% | 51,851 psi | 86% | 2395 fps | 100% |
| Lovex S060 | <<locked>> | 90% | 53,316 psi | 89% | 2352 fps | 99.8% |
| Lovex S062 | <<locked>> | 94% | 52,707 psi | 88% | 2392 fps | 100% |
| Lovex S065ᴾ | <<locked>> | 100% | 51,387 psi | 85% | 2382 fps | 98% |
| Lovex S070ᴾ | <<locked>> | 100% | 48,820 psi | 81% | 2365 fps | 96.5% |
| Norma 201 | <<locked>> | 90% | 51,764 psi | 86% | 2365 fps | 100% |
| Norma 202 | <<locked>> | 90% | 52,011 psi | 86% | 2369 fps | 100% |
| Norma 203B | <<locked>> | 94% | 52,750 psi | 88% | 2434 fps | 99.8% |
| Norma URPᴾ | <<locked>> | 100% | 46,166 psi | 77% | 2385 fps | 98.3% |
| Ramshot Big Game | <<locked>> | 94% | 53,185 psi | 88% | 2457 fps | 99.8% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 45,658 psi | 76% | 2379 fps | 96.4% |
| Ramshot TAC | <<locked>> | 88% | 52,417 psi | 87% | 2385 fps | 98.3% |
| Ramshot Wild Boar | <<locked>> | 88% | 51,459 psi | 85% | 2402 fps | 99.7% |
| Ramshot X-Terminator | <<locked>> | 86% | 53,519 psi | 89% | 2379 fps | 99.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,302 psi | 59% | 1457 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 84% | 51,924 psi | 86% | 2359 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 94% | 51,808 psi | 86% | 2388 fps | 97.4% |
| ReloadSwiss RS 52 | <<locked>> | 92% | 53,650 psi | 89% | 2503 fps | 99.7% |
| ReloadSwiss RS 60 | <<locked>> | 98% | 53,243 psi | 88% | 2533 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 46,050 psi | 77% | 2411 fps | 98.1% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 46,978 psi | 78% | 2428 fps | 97.6% |
| Rottweil R 901 | <<locked>> | 88% | 52,982 psi | 88% | 2352 fps | 100% |
| Rottweil R 902 | <<locked>> | 92% | 52,170 psi | 87% | 2365 fps | 100% |
| Rottweil R 903 | <<locked>> | 98% | 52,634 psi | 87% | 2428 fps | 100% |
| Rottweil R 907ᴾ | <<locked>> | 100% | 54,070 psi | 90% | 2405 fps | 96.6% |
| Shooters World Long Rifleᴾ | <<locked>> | 100% | 51,387 psi | 85% | 2382 fps | 98% |
| Shooters World Match Rifle | <<locked>> | 90% | 51,851 psi | 86% | 2395 fps | 100% |
| Shooters World Precision | <<locked>> | 94% | 52,707 psi | 88% | 2392 fps | 100% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 48,820 psi | 81% | 2365 fps | 96.5% |
| Shooters World Tactical Rifle | <<locked>> | 82% | 51,764 psi | 86% | 2333 fps | 99.9% |
| SNPE Vectan SP 11 | <<locked>> | 96% | 51,140 psi | 85% | 2438 fps | 99.7% |
| SNPE Vectan SP 3 | <<locked>> | 82% | 51,706 psi | 86% | 2310 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 90% | 54,070 psi | 90% | 2411 fps | 98.9% |
| SNPE Vectan SP 9 | <<locked>> | 90% | 51,300 psi | 85% | 2392 fps | 99.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 90% | 54,012 psi | 90% | 2320 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 96% | 53,316 psi | 89% | 2313 fps | 100% |
| SNPE Vectan Tubal 7000ᴾ | <<locked>> | 100% | 51,866 psi | 86% | 2343 fps | 96.7% |
| Somchem S321 | <<locked>> | 86% | 53,258 psi | 88% | 2405 fps | 100% |
| Somchem S335 | <<locked>> | 90% | 52,924 psi | 88% | 2320 fps | 100% |
| Somchem S341 | <<locked>> | 90% | 53,388 psi | 89% | 2405 fps | 99.8% |
| Somchem S355 | <<locked>> | 98% | 53,635 psi | 89% | 2431 fps | 99.9% |
| Somchem S365ᴾ | <<locked>> | 100% | 41,234 psi | 69% | 2346 fps | 99.7% |
| Vihtavuori N130 | <<locked>> | 86% | 53,896 psi | 90% | 2290 fps | 100% |
| Vihtavuori N133 | <<locked>> | 90% | 53,954 psi | 90% | 2306 fps | 100% |
| Vihtavuori N135 | <<locked>> | 92% | 51,140 psi | 85% | 2336 fps | 100% |
| Vihtavuori N140 | <<locked>> | 92% | 52,417 psi | 87% | 2352 fps | 100% |
| Vihtavuori N150 | <<locked>> | 98% | 51,488 psi | 86% | 2369 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 48,704 psi | 81% | 2385 fps | 98.6% |
| Vihtavuori N530 | <<locked>> | 88% | 52,692 psi | 88% | 2372 fps | 100% |
| Vihtavuori N540 | <<locked>> | 94% | 53,969 psi | 90% | 2392 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 47,732 psi | 79% | 2392 fps | 98.3% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 34,243 psi | 57% | 2228 fps | 96.2% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 49,734 psi | 83% | 2375 fps | 99.8% |
| Winchester 748 | <<locked>> | 88% | 51,779 psi | 86% | 2411 fps | 100% |
| Winchester 760ᴾ | <<locked>> | 100% | 49,850 psi | 83% | 2438 fps | 96.6% |
| Winchester StaBALL Match | <<locked>> | 92% | 54,186 psi | 90% | 2441 fps | 100% |
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% | 42,206 psi | 70% | 2175 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 45,919 psi | 76% | 2267 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 34,737 psi | 58% | 2110 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 40,944 psi | 68% | 2231 fps | 99.9% |
| Accurate 2700 | <<locked>> | 90% | 48,631 psi | 81% | 2290 fps | 95% |
| Accurate 4064 | <<locked>> | 80% | 32,880 psi | 55% | 2100 fps | 99.6% |
| Accurate 4350 | <<locked>> | 92% | 34,998 psi | 58% | 2201 fps | 95.7% |
| Accurate LT-30 | <<locked>> | 80% | 50,749 psi | 84% | 2241 fps | 100% |
| Accurate LT-32 | <<locked>> | 80% | 51,140 psi | 85% | 2264 fps | 100% |
| ADI AR 2206H | <<locked>> | 80% | 38,841 psi | 65% | 2192 fps | 98% |
| ADI AR 2208 | <<locked>> | 80% | 32,996 psi | 55% | 2064 fps | 95.4% |
| ADI AR 2219 | <<locked>> | 80% | 50,546 psi | 84% | 2339 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 80% | 40,814 psi | 68% | 2201 fps | 99.2% |
| Alliant AR-Comp | <<locked>> | 80% | 39,900 psi | 66% | 2198 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 47,282 psi | 79% | 2369 fps | 99.7% |
| Alliant Power Pro 2000-MR | 38.1 gr | 80% | 34,809 psi | 58% | 2198 fps | 95.6% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 39,233 psi | 65% | 2205 fps | 98.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 32,111 psi | 53% | 2083 fps | 97.1% |
| Alliant Reloder-10x | <<locked>> | 80% | 47,950 psi | 80% | 2257 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 34,722 psi | 58% | 2136 fps | 96.4% |
| Alliant Reloder-16 | <<locked>> | 90% | 34,243 psi | 57% | 2169 fps | 95.1% |
| Alliant Reloder-17 | <<locked>> | 82% | 29,704 psi | 49% | 2093 fps | 95.1% |
| Alliant Reloder-23 | <<locked>> | 98% | 30,792 psi | 51% | 2123 fps | 95.3% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 49,458 psi | 82% | 2241 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 37,521 psi | 62% | 2192 fps | 96.5% |
| Bofors RP3 | <<locked>> | 80% | 31,430 psi | 52% | 2083 fps | 97% |
| Bofors RP7 | <<locked>> | 96% | 47,674 psi | 79% | 2316 fps | 95.2% |
| Hodgdon Benchmark | <<locked>> | 80% | 42,743 psi | 71% | 2195 fps | 99.7% |
| Hodgdon BL-C2 | <<locked>> | 80% | 38,754 psi | 64% | 2218 fps | 99.3% |
| Hodgdon CFE223 | <<locked>> | 80% | 42,525 psi | 71% | 2329 fps | 98.4% |
| Hodgdon H322 | <<locked>> | 80% | 46,354 psi | 77% | 2283 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 46,992 psi | 78% | 2306 fps | 100% |
| Hodgdon H380 | <<locked>> | 84% | 37,101 psi | 62% | 2175 fps | 95.6% |
| Hodgdon H414 | <<locked>> | 96% | 43,990 psi | 73% | 2346 fps | 95.1% |
| Hodgdon H4895 | <<locked>> | 80% | 39,102 psi | 65% | 2201 fps | 98.5% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 29,370 psi | 49% | 2037 fps | 95.1% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 34,969 psi | 58% | 2175 fps | 98% |
| Hodgdon Superformance | <<locked>> | 98% | 47,630 psi | 79% | 2411 fps | 95.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,020 psi | 43% | 1270 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 37,695 psi | 63% | 2165 fps | 98.1% |
| IMR 3031 | <<locked>> | 80% | 38,116 psi | 63% | 2205 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 34,577 psi | 57% | 2093 fps | 96.3% |
| IMR 4166 Enduron | <<locked>> | 86% | 44,759 psi | 74% | 2241 fps | 95.1% |
| IMR 4198 | <<locked>> | 80% | 48,472 psi | 81% | 2221 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 94% | 46,789 psi | 78% | 2303 fps | 95.5% |
| IMR 4831 | <<locked>> | 92% | 34,272 psi | 57% | 2169 fps | 95.5% |
| IMR 4895 | <<locked>> | 80% | 35,520 psi | 59% | 2162 fps | 97.3% |
| IMR 8208 XBR | <<locked>> | 80% | 40,814 psi | 68% | 2201 fps | 99.2% |
| Lovex D073.5 | <<locked>> | 80% | 45,600 psi | 76% | 2274 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 37,202 psi | 62% | 2178 fps | 99.7% |
| Lovex S060 | <<locked>> | 80% | 39,479 psi | 66% | 2142 fps | 98.1% |
| Lovex S062 | <<locked>> | 80% | 34,345 psi | 57% | 2100 fps | 98.1% |
| Lovex S065 | <<locked>> | 92% | 40,408 psi | 67% | 2211 fps | 95.6% |
| Lovex S070 | <<locked>> | 96% | 43,366 psi | 72% | 2280 fps | 95.1% |
| Norma 201 | <<locked>> | 80% | 38,029 psi | 63% | 2156 fps | 98.9% |
| Norma 202 | <<locked>> | 80% | 38,087 psi | 63% | 2165 fps | 99.9% |
| Norma 203B | <<locked>> | 80% | 34,113 psi | 57% | 2126 fps | 96.8% |
| Norma URP | <<locked>> | 92% | 36,013 psi | 60% | 2208 fps | 95.8% |
| Ramshot Big Game | <<locked>> | 80% | 33,417 psi | 56% | 2133 fps | 96.2% |
| Ramshot Hunter | <<locked>> | 98% | 42,960 psi | 71% | 2336 fps | 95.7% |
| Ramshot TAC | <<locked>> | 80% | 40,625 psi | 67% | 2201 fps | 95.8% |
| Ramshot Wild Boar | <<locked>> | 80% | 39,595 psi | 66% | 2218 fps | 98.1% |
| Ramshot X-Terminator | <<locked>> | 80% | 44,106 psi | 73% | 2244 fps | 98.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,150 psi | 43% | 1299 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 45,774 psi | 76% | 2274 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 42,786 psi | 71% | 2251 fps | 95.4% |
| ReloadSwiss RS 52 | 36.9 gr | 80% | 35,578 psi | 59% | 2211 fps | 96.6% |
| ReloadSwiss RS 60 | 37.5 gr | 80% | 29,530 psi | 49% | 2096 fps | 97.7% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 35,230 psi | 59% | 2218 fps | 95.2% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 38,682 psi | 64% | 2277 fps | 95.1% |
| Rottweil R 901 | <<locked>> | 80% | 41,858 psi | 70% | 2195 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 36,230 psi | 60% | 2116 fps | 98.5% |
| Rottweil R 903 | <<locked>> | 80% | 29,573 psi | 49% | 2037 fps | 96% |
| Rottweil R 907 | <<locked>> | 96% | 47,674 psi | 79% | 2316 fps | 95.2% |
| Shooters World Long Rifle | <<locked>> | 92% | 40,408 psi | 67% | 2211 fps | 95.6% |
| Shooters World Match Rifle | <<locked>> | 80% | 37,202 psi | 62% | 2178 fps | 99.7% |
| Shooters World Precision | <<locked>> | 80% | 34,345 psi | 57% | 2100 fps | 98.1% |
| Shooters World SW4350 | <<locked>> | 96% | 43,366 psi | 72% | 2280 fps | 95.1% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 48,225 psi | 80% | 2287 fps | 99.8% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 30,647 psi | 51% | 2073 fps | 95.2% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 48,414 psi | 80% | 2270 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 38,595 psi | 64% | 2175 fps | 95.9% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 37,115 psi | 62% | 2162 fps | 97.5% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 39,581 psi | 66% | 2119 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 32,561 psi | 54% | 2011 fps | 99.8% |
| SNPE Vectan Tubal 7000 | <<locked>> | 96% | 45,339 psi | 75% | 2254 fps | 95.3% |
| Somchem S321 | <<locked>> | 80% | 43,598 psi | 72% | 2270 fps | 99.7% |
| Somchem S335 | <<locked>> | 80% | 39,189 psi | 65% | 2126 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 38,232 psi | 64% | 2178 fps | 97.7% |
| Somchem S355 | <<locked>> | 80% | 30,690 psi | 51% | 2044 fps | 96.1% |
| Somchem S365 | <<locked>> | 86% | 26,760 psi | 44% | 2028 fps | 95.5% |
| Vihtavuori N130 | <<locked>> | 80% | 44,904 psi | 75% | 2175 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 39,726 psi | 66% | 2119 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 35,070 psi | 58% | 2106 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 35,998 psi | 60% | 2113 fps | 99.9% |
| Vihtavuori N150 | <<locked>> | 80% | 29,080 psi | 48% | 1995 fps | 97% |
| Vihtavuori N160 | <<locked>> | 90% | 35,404 psi | 59% | 2162 fps | 95.4% |
| Vihtavuori N530 | <<locked>> | 80% | 40,756 psi | 68% | 2201 fps | 99.3% |
| Vihtavuori N540 | <<locked>> | 80% | 34,664 psi | 58% | 2106 fps | 99.6% |
| Vihtavuori N550 | <<locked>> | 90% | 34,548 psi | 57% | 2165 fps | 95% |
| Vihtavuori N555 | <<locked>> | 98% | 32,343 psi | 54% | 2188 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 29,675 psi | 49% | 2011 fps | 95.2% |
| Winchester 748 | <<locked>> | 80% | 39,465 psi | 66% | 2231 fps | 99.6% |
| Winchester 760 | <<locked>> | 96% | 43,990 psi | 73% | 2346 fps | 95.1% |
| Winchester StaBALL Match | <<locked>> | 80% | 36,318 psi | 60% | 2165 fps | 97.9% |
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 105 powders for .308 Win. Ackley Improved loaded with the .308 | 205gr | Sierra GameKing. ReloadSwiss RS 60 delivers the highest muzzle velocity at 2,533 fps; across all powders the maximum-charge window runs from 1,424 fps to 2,533 fps. Accurate 4350 gives the best case fill at 100 %, and 105 of the 105 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (415 MPa), the top charges use 54–90 %, leaving at least 10 % headroom. The 205.0 gr projectile in 0.308" calls for a 1:13.0 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 60, ReloadSwiss RS 52 rank at the top here: for .308 Win. Ackley Improved with the .308 | 205gr | Sierra GameKing 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.