Load Specifications
Bullet Manufacturer:SAKO
Bullet Weight:220 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 | 220gr | Sako Hammerhead bullet and 104 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 60, Alliant Power Pro 2000-MR 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>> | 86% | 53,040 psi | 88% | 2221 fps | 100% |
| Accurate 2460 | <<locked>> | 82% | 50,937 psi | 85% | 2241 fps | 100% |
| Accurate 2495 | <<locked>> | 92% | 53,896 psi | 90% | 2277 fps | 100% |
| Accurate 2520 | <<locked>> | 86% | 52,692 psi | 88% | 2300 fps | 100% |
| Accurate 2700 | <<locked>> | 92% | 54,012 psi | 90% | 2280 fps | 97% |
| Accurate 4064 | <<locked>> | 94% | 53,417 psi | 89% | 2316 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 49,066 psi | 82% | 2339 fps | 99.3% |
| ADI AR 2206H | <<locked>> | 88% | 51,851 psi | 86% | 2306 fps | 99.9% |
| ADI AR 2208 | <<locked>> | 94% | 52,620 psi | 87% | 2303 fps | 99.8% |
| ADI Benchmark 8208 | <<locked>> | 88% | 54,360 psi | 90% | 2306 fps | 100% |
| Alliant AR-Comp | <<locked>> | 88% | 54,375 psi | 90% | 2280 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 82% | 52,475 psi | 87% | 2346 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 92% | 54,346 psi | 90% | 2448 fps | 99.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 94% | 51,822 psi | 86% | 2320 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 82% | 52,736 psi | 88% | 2221 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 92% | 52,620 psi | 87% | 2339 fps | 99.8% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 48,182 psi | 80% | 2343 fps | 99.4% |
| Alliant Reloder-17 | <<locked>> | 98% | 52,141 psi | 87% | 2421 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 34,113 psi | 57% | 2129 fps | 97.7% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 37,492 psi | 62% | 2247 fps | 96.4% |
| Baschieri & Pellagri 107 | <<locked>> | 88% | 51,082 psi | 85% | 2320 fps | 99.5% |
| Bofors RP3 | <<locked>> | 94% | 52,359 psi | 87% | 2336 fps | 100% |
| Bofors RP7 | <<locked>> | 98% | 53,069 psi | 88% | 2306 fps | 97.1% |
| Hodgdon Benchmark | <<locked>> | 86% | 53,040 psi | 88% | 2251 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 88% | 53,026 psi | 88% | 2333 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 84% | 51,430 psi | 85% | 2372 fps | 99.8% |
| Hodgdon H322 | <<locked>> | 82% | 51,663 psi | 86% | 2257 fps | 100% |
| Hodgdon H335 | <<locked>> | 82% | 52,402 psi | 87% | 2283 fps | 100% |
| Hodgdon H380 | <<locked>> | 94% | 53,519 psi | 89% | 2343 fps | 99.4% |
| Hodgdon H414ᴾ | <<locked>> | 100% | 52,272 psi | 87% | 2382 fps | 97.8% |
| Hodgdon H4350 | <<locked>> | 98% | 53,534 psi | 89% | 2349 fps | 96.6% |
| Hodgdon H4895 | <<locked>> | 88% | 52,286 psi | 87% | 2313 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 44,295 psi | 74% | 2244 fps | 99.6% |
| Hodgdon LEVERevolution | <<locked>> | 92% | 54,056 psi | 90% | 2382 fps | 100% |
| Hodgdon Superformanceᴾ | <<locked>> | 100% | 53,287 psi | 89% | 2411 fps | 97.3% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,027 psi | 58% | 1365 fps | 100% |
| Hodgdon VARGET | <<locked>> | 90% | 53,374 psi | 89% | 2313 fps | 100% |
| IMR 3031 | <<locked>> | 88% | 51,808 psi | 86% | 2300 fps | 100% |
| IMR 4064 | <<locked>> | 92% | 52,359 psi | 87% | 2290 fps | 99.8% |
| IMR 4166 Enduron | <<locked>> | 90% | 52,489 psi | 87% | 2270 fps | 97.5% |
| IMR 4198 | <<locked>> | 82% | 53,084 psi | 88% | 2185 fps | 100% |
| IMR 4350ᴾ | <<locked>> | 100% | 49,458 psi | 82% | 2283 fps | 96.5% |
| IMR 4451 Enduron | <<locked>> | 96% | 51,851 psi | 86% | 2293 fps | 97.4% |
| IMR 4831ᴾ | <<locked>> | 100% | 46,673 psi | 78% | 2293 fps | 99% |
| IMR 4895 | <<locked>> | 92% | 53,911 psi | 90% | 2362 fps | 100% |
| IMR 8208 XBR | <<locked>> | 88% | 54,360 psi | 90% | 2306 fps | 100% |
| Lovex D073.5 | <<locked>> | 84% | 54,360 psi | 90% | 2293 fps | 100% |
| Lovex D073.6 | <<locked>> | 90% | 54,389 psi | 90% | 2326 fps | 100% |
| Lovex S060 | <<locked>> | 88% | 51,866 psi | 86% | 2244 fps | 99.9% |
| Lovex S062 | <<locked>> | 92% | 51,619 psi | 86% | 2283 fps | 100% |
| Lovex S065ᴾ | <<locked>> | 100% | 53,853 psi | 89% | 2326 fps | 98.9% |
| Lovex S070ᴾ | <<locked>> | 100% | 51,256 psi | 85% | 2313 fps | 97.7% |
| Norma 201 | <<locked>> | 90% | 53,780 psi | 89% | 2300 fps | 100% |
| Norma 202 | <<locked>> | 90% | 54,172 psi | 90% | 2300 fps | 100% |
| Norma 203B | <<locked>> | 92% | 51,779 psi | 86% | 2326 fps | 99.9% |
| Norma URPᴾ | <<locked>> | 100% | 48,675 psi | 81% | 2333 fps | 99.2% |
| Ramshot Big Game | <<locked>> | 92% | 52,127 psi | 87% | 2352 fps | 99.9% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 47,732 psi | 79% | 2326 fps | 97.7% |
| Ramshot TAC | <<locked>> | 86% | 51,358 psi | 85% | 2283 fps | 98.7% |
| Ramshot Wild Boar | <<locked>> | 88% | 53,737 psi | 89% | 2339 fps | 100% |
| Ramshot X-Terminator | <<locked>> | 84% | 51,967 psi | 86% | 2267 fps | 99.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,476 psi | 59% | 1401 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 84% | 53,809 psi | 89% | 2287 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 94% | 54,259 psi | 90% | 2333 fps | 98.4% |
| ReloadSwiss RS 52 | <<locked>> | 90% | 52,489 psi | 87% | 2392 fps | 99.8% |
| ReloadSwiss RS 60 | <<locked>> | 96% | 52,185 psi | 87% | 2425 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 48,544 psi | 81% | 2359 fps | 99.1% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 49,153 psi | 82% | 2379 fps | 98.8% |
| Rottweil R 901 | <<locked>> | 86% | 51,866 psi | 86% | 2244 fps | 100% |
| Rottweil R 902 | <<locked>> | 92% | 54,244 psi | 90% | 2297 fps | 100% |
| Rottweil R 903 | <<locked>> | 96% | 51,866 psi | 86% | 2323 fps | 100% |
| Rottweil R 907 | <<locked>> | 98% | 53,069 psi | 88% | 2306 fps | 97.1% |
| Shooters World Long Rifleᴾ | <<locked>> | 100% | 53,853 psi | 89% | 2326 fps | 98.9% |
| Shooters World Match Rifle | <<locked>> | 90% | 54,389 psi | 90% | 2326 fps | 100% |
| Shooters World Precision | <<locked>> | 92% | 51,619 psi | 86% | 2283 fps | 100% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 51,256 psi | 85% | 2313 fps | 97.7% |
| Shooters World Tactical Rifle | <<locked>> | 82% | 53,708 psi | 89% | 2267 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 96% | 53,780 psi | 89% | 2379 fps | 100% |
| SNPE Vectan SP 3 | <<locked>> | 82% | 53,708 psi | 89% | 2238 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 88% | 52,721 psi | 88% | 2303 fps | 99.2% |
| SNPE Vectan SP 9 | <<locked>> | 90% | 53,185 psi | 88% | 2323 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 88% | 52,692 psi | 88% | 2211 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 94% | 52,286 psi | 87% | 2211 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 98% | 51,039 psi | 85% | 2247 fps | 97.3% |
| Somchem S321 | <<locked>> | 84% | 51,808 psi | 86% | 2293 fps | 100% |
| Somchem S335 | <<locked>> | 88% | 51,619 psi | 86% | 2211 fps | 100% |
| Somchem S341 | <<locked>> | 88% | 52,156 psi | 87% | 2297 fps | 99.9% |
| Somchem S355 | <<locked>> | 96% | 52,750 psi | 88% | 2326 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 43,279 psi | 72% | 2290 fps | 100% |
| Vihtavuori N130 | <<locked>> | 84% | 52,504 psi | 87% | 2178 fps | 100% |
| Vihtavuori N133 | <<locked>> | 88% | 52,765 psi | 88% | 2198 fps | 100% |
| Vihtavuori N135 | <<locked>> | 92% | 53,330 psi | 89% | 2264 fps | 100% |
| Vihtavuori N140 | <<locked>> | 90% | 51,271 psi | 85% | 2244 fps | 100% |
| Vihtavuori N150 | <<locked>> | 98% | 53,983 psi | 90% | 2306 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 51,343 psi | 85% | 2329 fps | 99.4% |
| Vihtavuori N530 | <<locked>> | 86% | 51,372 psi | 85% | 2264 fps | 100% |
| Vihtavuori N540 | <<locked>> | 92% | 52,634 psi | 87% | 2283 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 50,067 psi | 83% | 2333 fps | 99.2% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 36,303 psi | 60% | 2188 fps | 97.7% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 51,967 psi | 86% | 2316 fps | 100% |
| Winchester 748 | <<locked>> | 88% | 54,157 psi | 90% | 2346 fps | 100% |
| Winchester 760ᴾ | <<locked>> | 100% | 52,272 psi | 87% | 2382 fps | 97.8% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 30,371 psi | 50% | 2110 fps | 96.7% |
| Winchester StaBALL Match | <<locked>> | 90% | 52,924 psi | 88% | 2333 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% | 43,903 psi | 73% | 2110 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 47,747 psi | 79% | 2201 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 36,535 psi | 61% | 2051 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 43,047 psi | 72% | 2172 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 47,601 psi | 79% | 2195 fps | 95.7% |
| Accurate 4064 | <<locked>> | 80% | 34,577 psi | 57% | 2047 fps | 100% |
| Accurate 4350 | <<locked>> | 88% | 32,489 psi | 54% | 2070 fps | 95.7% |
| ADI AR 2206H | <<locked>> | 80% | 40,495 psi | 67% | 2139 fps | 98.9% |
| ADI AR 2208 | <<locked>> | 80% | 34,345 psi | 57% | 2014 fps | 96.7% |
| ADI Benchmark 8208 | <<locked>> | 80% | 42,511 psi | 71% | 2146 fps | 99.7% |
| Alliant AR-Comp | <<locked>> | 80% | 41,887 psi | 70% | 2133 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 49,472 psi | 82% | 2306 fps | 100% |
| Alliant Power Pro 2000-MR | 37.5 gr | 80% | 36,463 psi | 61% | 2159 fps | 97.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 33,692 psi | 56% | 2034 fps | 98.2% |
| Alliant Reloder-10x | <<locked>> | 80% | 49,748 psi | 83% | 2185 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 36,361 psi | 60% | 2087 fps | 97.6% |
| Alliant Reloder-16 | <<locked>> | 86% | 31,647 psi | 53% | 2034 fps | 95% |
| Alliant Reloder-17 | <<locked>> | 80% | 29,037 psi | 48% | 2001 fps | 95.8% |
| Alliant Reloder-23 | <<locked>> | 94% | 28,558 psi | 47% | 1998 fps | 95.3% |
| Alliant Reloder-26 | <<locked>> | 98% | 34,882 psi | 58% | 2192 fps | 95.3% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 39,117 psi | 65% | 2136 fps | 97.7% |
| Bofors RP3 | <<locked>> | 80% | 32,866 psi | 55% | 2034 fps | 98.1% |
| Bofors RP7 | <<locked>> | 92% | 44,106 psi | 73% | 2178 fps | 95.2% |
| Hodgdon Benchmark | <<locked>> | 80% | 44,324 psi | 74% | 2133 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 40,741 psi | 68% | 2165 fps | 99.8% |
| Hodgdon CFE223 | <<locked>> | 80% | 44,469 psi | 74% | 2274 fps | 99.2% |
| Hodgdon H322 | <<locked>> | 80% | 48,356 psi | 80% | 2218 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 49,153 psi | 82% | 2244 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 33,953 psi | 56% | 2034 fps | 95.4% |
| Hodgdon H414 | <<locked>> | 92% | 40,393 psi | 67% | 2201 fps | 95% |
| Hodgdon H4350 | <<locked>> | 94% | 47,485 psi | 79% | 2264 fps | 95.2% |
| Hodgdon H4895 | <<locked>> | 80% | 40,843 psi | 68% | 2149 fps | 99.3% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 27,122 psi | 45% | 1913 fps | 95% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 36,419 psi | 61% | 2119 fps | 98.9% |
| Hodgdon Superformance | <<locked>> | 96% | 46,470 psi | 77% | 2313 fps | 95.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,947 psi | 43% | 1217 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 39,001 psi | 65% | 2103 fps | 98.9% |
| IMR 3031 | <<locked>> | 80% | 40,030 psi | 67% | 2142 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 36,027 psi | 60% | 2041 fps | 97.5% |
| IMR 4166 Enduron | <<locked>> | 82% | 41,176 psi | 68% | 2100 fps | 95% |
| IMR 4198 | <<locked>> | 80% | 50,024 psi | 83% | 2149 fps | 100% |
| IMR 4350 | <<locked>> | 96% | 43,947 psi | 73% | 2201 fps | 95.1% |
| IMR 4451 Enduron | <<locked>> | 90% | 43,294 psi | 72% | 2165 fps | 95.5% |
| IMR 4831 | <<locked>> | 88% | 31,676 psi | 53% | 2034 fps | 95.4% |
| IMR 4895 | <<locked>> | 80% | 37,159 psi | 62% | 2110 fps | 98.3% |
| IMR 8208 XBR | <<locked>> | 80% | 42,511 psi | 71% | 2146 fps | 99.7% |
| Lovex D073.5 | <<locked>> | 80% | 47,485 psi | 79% | 2208 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 38,841 psi | 65% | 2119 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 40,915 psi | 68% | 2087 fps | 98.9% |
| Lovex S062 | <<locked>> | 80% | 35,868 psi | 60% | 2047 fps | 99% |
| Lovex S065 | <<locked>> | 88% | 37,420 psi | 62% | 2080 fps | 95.5% |
| Lovex S070 | <<locked>> | 92% | 40,045 psi | 67% | 2142 fps | 95.1% |
| Norma 201 | <<locked>> | 80% | 39,624 psi | 66% | 2100 fps | 99.5% |
| Norma 202 | <<locked>> | 80% | 39,740 psi | 66% | 2106 fps | 100% |
| Norma 203B | <<locked>> | 80% | 35,752 psi | 59% | 2077 fps | 97.9% |
| Norma URP | <<locked>> | 88% | 33,431 psi | 56% | 2073 fps | 95.7% |
| Ramshot Big Game | <<locked>> | 80% | 35,070 psi | 58% | 2087 fps | 97.5% |
| Ramshot Hunter | <<locked>> | 94% | 39,595 psi | 66% | 2195 fps | 95.6% |
| Ramshot TAC | <<locked>> | 80% | 42,148 psi | 70% | 2146 fps | 97% |
| Ramshot Wild Boar | <<locked>> | 80% | 41,495 psi | 69% | 2165 fps | 99% |
| Ramshot X-Terminator | <<locked>> | 80% | 45,672 psi | 76% | 2182 fps | 99.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,440 psi | 44% | 1250 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 47,732 psi | 79% | 2211 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 39,349 psi | 65% | 2110 fps | 95.3% |
| ReloadSwiss RS 52 | 36.3 gr | 80% | 37,449 psi | 62% | 2162 fps | 97.9% |
| ReloadSwiss RS 60 | 36.9 gr | 80% | 30,922 psi | 51% | 2057 fps | 99% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 32,430 psi | 54% | 2083 fps | 95.1% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 37,884 psi | 63% | 2185 fps | 96% |
| Rottweil R 901 | <<locked>> | 80% | 43,497 psi | 72% | 2133 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 37,739 psi | 63% | 2060 fps | 99.2% |
| Rottweil R 903 | <<locked>> | 80% | 31,125 psi | 52% | 1991 fps | 97.3% |
| Rottweil R 907 | <<locked>> | 92% | 44,106 psi | 73% | 2178 fps | 95.2% |
| Shooters World Long Rifle | <<locked>> | 88% | 37,420 psi | 62% | 2080 fps | 95.5% |
| Shooters World Match Rifle | <<locked>> | 80% | 38,841 psi | 65% | 2119 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 35,868 psi | 60% | 2047 fps | 99% |
| Shooters World SW4350 | <<locked>> | 92% | 40,045 psi | 67% | 2142 fps | 95.1% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 50,343 psi | 84% | 2224 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 32,082 psi | 53% | 2031 fps | 96.7% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 50,633 psi | 84% | 2201 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 40,205 psi | 67% | 2123 fps | 97.1% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 38,841 psi | 65% | 2113 fps | 98.5% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 41,379 psi | 69% | 2064 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 34,127 psi | 57% | 1959 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 41,684 psi | 69% | 2116 fps | 95.3% |
| Somchem S321 | <<locked>> | 80% | 45,368 psi | 75% | 2208 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 40,741 psi | 68% | 2067 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 39,871 psi | 66% | 2123 fps | 98.7% |
| Somchem S355 | <<locked>> | 80% | 32,140 psi | 53% | 1998 fps | 97.4% |
| Somchem S365 | <<locked>> | 82% | 24,642 psi | 41% | 1896 fps | 95.3% |
| Vihtavuori N130 | <<locked>> | 80% | 46,862 psi | 78% | 2113 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 41,553 psi | 69% | 2060 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 36,985 psi | 61% | 2051 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 37,623 psi | 63% | 2057 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 30,516 psi | 51% | 1949 fps | 98.1% |
| Vihtavuori N160 | <<locked>> | 86% | 32,793 psi | 54% | 2031 fps | 95.3% |
| Vihtavuori N530 | <<locked>> | 80% | 42,235 psi | 70% | 2139 fps | 99.7% |
| Vihtavuori N540 | <<locked>> | 80% | 35,998 psi | 60% | 2047 fps | 99.9% |
| Vihtavuori N550 | <<locked>> | 88% | 34,040 psi | 57% | 2073 fps | 95.7% |
| Vihtavuori N555 | <<locked>> | 94% | 30,124 psi | 50% | 2057 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 27,195 psi | 45% | 1883 fps | 95% |
| Winchester 748 | <<locked>> | 80% | 41,466 psi | 69% | 2175 fps | 99.9% |
| Winchester 760 | <<locked>> | 92% | 40,393 psi | 67% | 2201 fps | 95% |
| Winchester StaBALL HD | <<locked>> | 98% | 28,572 psi | 47% | 2057 fps | 95.5% |
| Winchester StaBALL Match | <<locked>> | 80% | 38,130 psi | 63% | 2116 fps | 98.9% |
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 104 powders for .308 Win. Ackley Improved loaded with the .308 | 220gr | Sako Hammerhead. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,448 fps; across all powders the maximum-charge window runs from 1,365 fps to 2,448 fps. Accurate 4350 gives the best case fill at 100 %, and 104 of the 104 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (415 MPa), the top charges use 50–90 %, leaving at least 10 % headroom. The 220.0 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-23 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. ReloadSwiss RS 60, Alliant Power Pro 2000-MR, ReloadSwiss RS 52 rank at the top here: for .308 Win. Ackley Improved with the .308 | 220gr | Sako Hammerhead 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.