Load Specifications
Load data in caliber .308 Win. with .308 | 205gr | Sierra GameKing bullet and 95 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, Hodgdon CFE223 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.
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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% | 53,940 psi | 90% | 2297 fps | 100% |
| Accurate 2200 | <<locked>> | 82% | 54,273 psi | 90% | 2379 fps | 99.3% |
| Accurate 2460 | <<locked>> | 86% | 52,518 psi | 87% | 2323 fps | 100% |
| Accurate 2495 | <<locked>> | 96% | 54,128 psi | 90% | 2352 fps | 100% |
| Accurate 2520 | <<locked>> | 90% | 53,606 psi | 89% | 2372 fps | 100% |
| Accurate 4064 | <<locked>> | 98% | 53,621 psi | 89% | 2385 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 42,235 psi | 70% | 2300 fps | 97.2% |
| Accurate LT-30 | <<locked>> | 84% | 54,259 psi | 90% | 2251 fps | 100% |
| Accurate LT-32 | <<locked>> | 82% | 51,503 psi | 86% | 2231 fps | 100% |
| ADI AR 2206H | <<locked>> | 92% | 52,924 psi | 88% | 2379 fps | 99.6% |
| ADI AR 2208 | <<locked>> | 98% | 53,693 psi | 89% | 2372 fps | 99.3% |
| ADI AR 2219 | <<locked>> | 82% | 50,952 psi | 85% | 2316 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 90% | 52,170 psi | 87% | 2339 fps | 99.9% |
| Alliant AR-Comp | <<locked>> | 90% | 51,532 psi | 86% | 2323 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 86% | 53,838 psi | 89% | 2428 fps | 99.9% |
| Alliant Power Pro 2000-MR | <<locked>> | 94% | 52,040 psi | 86% | 2467 fps | 99.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 98% | 52,489 psi | 87% | 2388 fps | 99.9% |
| Alliant Reloder-10x | <<locked>> | 86% | 53,983 psi | 90% | 2303 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 96% | 53,330 psi | 89% | 2405 fps | 99.4% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 43,149 psi | 72% | 2306 fps | 97.4% |
| Alliant Reloder-17ᴾ | <<locked>> | 100% | 49,661 psi | 83% | 2441 fps | 99.7% |
| Baschieri & Pellagri 106 | <<locked>> | 84% | 53,185 psi | 88% | 2257 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 92% | 52,228 psi | 87% | 2388 fps | 98.9% |
| Bofors RP3 | <<locked>> | 98% | 52,591 psi | 87% | 2402 fps | 99.9% |
| Hodgdon Benchmark | <<locked>> | 88% | 51,372 psi | 85% | 2287 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 92% | 54,157 psi | 90% | 2411 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 88% | 52,170 psi | 87% | 2441 fps | 99.3% |
| Hodgdon H322 | <<locked>> | 86% | 52,939 psi | 88% | 2339 fps | 100% |
| Hodgdon H335 | <<locked>> | 86% | 53,896 psi | 90% | 2362 fps | 100% |
| Hodgdon H380 | <<locked>> | 96% | 50,995 psi | 85% | 2365 fps | 98.2% |
| Hodgdon H4895 | <<locked>> | 92% | 53,330 psi | 89% | 2388 fps | 99.8% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 39,523 psi | 66% | 2215 fps | 98% |
| Hodgdon LEVERevolution | <<locked>> | 94% | 51,561 psi | 86% | 2411 fps | 99.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,519 psi | 57% | 1391 fps | 100% |
| Hodgdon VARGET | <<locked>> | 92% | 51,242 psi | 85% | 2343 fps | 99.7% |
| IMR 3031 | <<locked>> | 92% | 52,272 psi | 87% | 2375 fps | 100% |
| IMR 4064 | <<locked>> | 96% | 53,330 psi | 89% | 2359 fps | 99.4% |
| IMR 4166 Enduron | <<locked>> | 94% | 54,273 psi | 90% | 2339 fps | 96.5% |
| IMR 4198 | <<locked>> | 86% | 54,433 psi | 90% | 2264 fps | 100% |
| IMR 4451 Enduronᴾ | <<locked>> | 100% | 52,837 psi | 88% | 2352 fps | 96.2% |
| IMR 4831ᴾ | <<locked>> | 100% | 40,669 psi | 68% | 2254 fps | 96.8% |
| IMR 4895 | <<locked>> | 94% | 51,488 psi | 86% | 2392 fps | 99.6% |
| IMR 8208 XBR | <<locked>> | 90% | 52,170 psi | 87% | 2339 fps | 99.9% |
| Lovex D073.5 | <<locked>> | 86% | 52,272 psi | 87% | 2333 fps | 100% |
| Lovex D073.6 | <<locked>> | 92% | 51,285 psi | 85% | 2356 fps | 100% |
| Lovex S060 | <<locked>> | 92% | 53,301 psi | 89% | 2316 fps | 99.6% |
| Lovex S062 | <<locked>> | 96% | 52,591 psi | 87% | 2359 fps | 100% |
| Lovex S065ᴾ | <<locked>> | 100% | 48,254 psi | 80% | 2303 fps | 96.9% |
| Norma 200 | <<locked>> | 82% | 53,838 psi | 89% | 2277 fps | 100% |
| Norma 201 | <<locked>> | 92% | 51,517 psi | 86% | 2329 fps | 99.9% |
| Norma 202 | <<locked>> | 92% | 51,677 psi | 86% | 2336 fps | 100% |
| Norma 203B | <<locked>> | 96% | 52,431 psi | 87% | 2395 fps | 99.6% |
| Norma URPᴾ | <<locked>> | 100% | 43,062 psi | 72% | 2300 fps | 97.2% |
| Ramshot Big Game | <<locked>> | 96% | 53,026 psi | 88% | 2421 fps | 99.5% |
| Ramshot TAC | <<locked>> | 90% | 52,852 psi | 88% | 2356 fps | 97.9% |
| Ramshot Wild Boar | <<locked>> | 90% | 51,590 psi | 86% | 2369 fps | 99.5% |
| Ramshot X-Terminator | <<locked>> | 88% | 53,722 psi | 89% | 2346 fps | 99.5% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 34,896 psi | 58% | 1424 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 86% | 52,257 psi | 87% | 2329 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 96% | 52,025 psi | 86% | 2352 fps | 96.8% |
| ReloadSwiss RS 52 | <<locked>> | 94% | 53,142 psi | 88% | 2461 fps | 99.4% |
| ReloadSwiss RS 60ᴾ | <<locked>> | 100% | 53,040 psi | 88% | 2493 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 42,351 psi | 70% | 2316 fps | 96.8% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 43,816 psi | 73% | 2329 fps | 96% |
| Rottweil R 901 | <<locked>> | 90% | 53,069 psi | 88% | 2323 fps | 100% |
| Rottweil R 902 | <<locked>> | 94% | 51,938 psi | 86% | 2326 fps | 99.9% |
| Rottweil R 903ᴾ | <<locked>> | 100% | 52,446 psi | 87% | 2392 fps | 99.8% |
| Shooters World Long Rifleᴾ | <<locked>> | 100% | 48,254 psi | 80% | 2303 fps | 96.9% |
| Shooters World Match Rifle | <<locked>> | 92% | 51,285 psi | 85% | 2356 fps | 100% |
| Shooters World Precision | <<locked>> | 96% | 52,591 psi | 87% | 2359 fps | 100% |
| Shooters World Tactical Rifle | <<locked>> | 84% | 52,025 psi | 86% | 2303 fps | 99.8% |
| SNPE Vectan SP 10 | <<locked>> | 82% | 51,198 psi | 85% | 2323 fps | 100% |
| SNPE Vectan SP 11ᴾ | <<locked>> | 100% | 54,360 psi | 90% | 2444 fps | 99.7% |
| SNPE Vectan SP 3 | <<locked>> | 84% | 51,750 psi | 86% | 2280 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 92% | 54,157 psi | 90% | 2375 fps | 98.5% |
| SNPE Vectan SP 9 | <<locked>> | 92% | 51,053 psi | 85% | 2352 fps | 99.4% |
| SNPE Vectan Tubal 3000 | <<locked>> | 92% | 54,128 psi | 90% | 2287 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 98% | 53,447 psi | 89% | 2283 fps | 100% |
| Somchem S321 | <<locked>> | 88% | 53,330 psi | 89% | 2372 fps | 100% |
| Somchem S335 | <<locked>> | 92% | 52,750 psi | 88% | 2283 fps | 100% |
| Somchem S341 | <<locked>> | 92% | 53,447 psi | 89% | 2369 fps | 99.5% |
| Somchem S355ᴾ | <<locked>> | 100% | 53,113 psi | 88% | 2388 fps | 99.8% |
| Somchem S365ᴾ | <<locked>> | 100% | 38,232 psi | 64% | 2257 fps | 99% |
| Vihtavuori N130 | <<locked>> | 88% | 54,027 psi | 90% | 2260 fps | 100% |
| Vihtavuori N133 | <<locked>> | 92% | 53,954 psi | 90% | 2277 fps | 100% |
| Vihtavuori N135 | <<locked>> | 96% | 54,128 psi | 90% | 2339 fps | 100% |
| Vihtavuori N140 | <<locked>> | 94% | 52,301 psi | 87% | 2320 fps | 100% |
| Vihtavuori N150ᴾ | <<locked>> | 100% | 51,488 psi | 86% | 2336 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 45,310 psi | 75% | 2300 fps | 97.5% |
| Vihtavuori N530 | <<locked>> | 90% | 52,591 psi | 87% | 2339 fps | 99.9% |
| Vihtavuori N540 | <<locked>> | 96% | 53,606 psi | 89% | 2359 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 44,077 psi | 73% | 2303 fps | 97.1% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 46,630 psi | 77% | 2293 fps | 99.2% |
| Winchester 748 | <<locked>> | 90% | 51,605 psi | 86% | 2379 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 94% | 53,824 psi | 89% | 2402 fps | 99.9% |
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% | 39,769 psi | 66% | 2113 fps | 100% |
| Accurate 2200 | <<locked>> | 80% | 51,053 psi | 85% | 2336 fps | 98.9% |
| Accurate 2460 | <<locked>> | 80% | 42,830 psi | 71% | 2195 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 32,111 psi | 53% | 2037 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 38,276 psi | 64% | 2159 fps | 99.6% |
| Accurate 4064 | <<locked>> | 80% | 30,356 psi | 50% | 2024 fps | 99% |
| Accurate 4350 | <<locked>> | 96% | 36,666 psi | 61% | 2205 fps | 95.7% |
| Accurate LT-30 | <<locked>> | 80% | 48,124 psi | 80% | 2175 fps | 100% |
| Accurate LT-32 | <<locked>> | 80% | 48,515 psi | 81% | 2195 fps | 100% |
| ADI AR 2206H | <<locked>> | 80% | 36,535 psi | 61% | 2119 fps | 96.9% |
| ADI AR 2208 | <<locked>> | 84% | 35,172 psi | 58% | 2080 fps | 95.6% |
| ADI AR 2219 | <<locked>> | 80% | 47,500 psi | 79% | 2270 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 80% | 38,537 psi | 64% | 2133 fps | 98.5% |
| Alliant AR-Comp | <<locked>> | 80% | 37,202 psi | 62% | 2133 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 44,338 psi | 74% | 2293 fps | 99.1% |
| Alliant Power Pro 2000-MR | 37.4 gr | 84% | 37,275 psi | 62% | 2215 fps | 95.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 29,892 psi | 50% | 2011 fps | 95.8% |
| Alliant Reloder-10x | <<locked>> | 80% | 45,252 psi | 75% | 2195 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 32,547 psi | 54% | 2060 fps | 95% |
| Alliant Reloder-16 | <<locked>> | 94% | 36,230 psi | 60% | 2175 fps | 95.1% |
| Alliant Reloder-17 | <<locked>> | 86% | 31,473 psi | 52% | 2103 fps | 95.1% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 46,862 psi | 78% | 2178 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 35,172 psi | 58% | 2113 fps | 95.1% |
| Bofors RP3 | <<locked>> | 80% | 29,051 psi | 48% | 2005 fps | 95.6% |
| Hodgdon Benchmark | <<locked>> | 80% | 40,422 psi | 67% | 2126 fps | 99.2% |
| Hodgdon BL-C2 | <<locked>> | 80% | 36,100 psi | 60% | 2139 fps | 98.6% |
| Hodgdon CFE223 | 36.5 gr | 80% | 39,827 psi | 66% | 2247 fps | 97.3% |
| Hodgdon H322 | <<locked>> | 80% | 43,598 psi | 72% | 2215 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 44,077 psi | 73% | 2234 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 39,363 psi | 65% | 2185 fps | 95.7% |
| Hodgdon H4895 | <<locked>> | 80% | 36,753 psi | 61% | 2129 fps | 97.6% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 30,893 psi | 51% | 2041 fps | 95.1% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 32,532 psi | 54% | 2093 fps | 96.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,701 psi | 43% | 1240 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 35,215 psi | 59% | 2087 fps | 97% |
| IMR 3031 | <<locked>> | 80% | 35,331 psi | 59% | 2129 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 32,619 psi | 54% | 2021 fps | 95% |
| IMR 4166 Enduron | <<locked>> | 90% | 47,964 psi | 80% | 2251 fps | 95.2% |
| IMR 4198 | <<locked>> | 80% | 45,919 psi | 76% | 2162 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 98% | 49,821 psi | 83% | 2310 fps | 95.5% |
| IMR 4831 | <<locked>> | 96% | 35,998 psi | 60% | 2172 fps | 95.4% |
| IMR 4895 | <<locked>> | 80% | 33,243 psi | 55% | 2087 fps | 96% |
| IMR 8208 XBR | <<locked>> | 80% | 38,537 psi | 64% | 2133 fps | 98.5% |
| Lovex D073.5 | <<locked>> | 80% | 42,656 psi | 71% | 2198 fps | 99.6% |
| Lovex D073.6 | <<locked>> | 80% | 34,548 psi | 57% | 2103 fps | 99% |
| Lovex S060 | <<locked>> | 80% | 37,275 psi | 62% | 2070 fps | 97.1% |
| Lovex S062 | <<locked>> | 80% | 32,082 psi | 53% | 2024 fps | 97% |
| Lovex S065 | <<locked>> | 96% | 42,902 psi | 71% | 2221 fps | 95.6% |
| Norma 200 | <<locked>> | 80% | 50,720 psi | 84% | 2241 fps | 100% |
| Norma 201 | <<locked>> | 80% | 35,665 psi | 59% | 2080 fps | 98% |
| Norma 202 | <<locked>> | 80% | 35,650 psi | 59% | 2096 fps | 99.6% |
| Norma 203B | <<locked>> | 80% | 31,923 psi | 53% | 2054 fps | 95.4% |
| Norma URP | <<locked>> | 94% | 35,708 psi | 59% | 2169 fps | 95% |
| Ramshot Big Game | <<locked>> | 82% | 33,359 psi | 55% | 2100 fps | 95.5% |
| Ramshot TAC | <<locked>> | 82% | 40,857 psi | 68% | 2172 fps | 95.3% |
| Ramshot Wild Boar | <<locked>> | 80% | 37,014 psi | 61% | 2142 fps | 97% |
| Ramshot X-Terminator | <<locked>> | 80% | 41,524 psi | 69% | 2169 fps | 97.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 25,831 psi | 43% | 1270 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 43,018 psi | 71% | 2201 fps | 99.8% |
| ReloadSwiss RS 50 | <<locked>> | 92% | 45,571 psi | 76% | 2260 fps | 95.4% |
| ReloadSwiss RS 52 | 34.5 gr | 80% | 33,127 psi | 55% | 2126 fps | 95.1% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 27,804 psi | 46% | 2018 fps | 96.1% |
| ReloadSwiss RS 62 | <<locked>> | 96% | 37,318 psi | 62% | 2228 fps | 95.2% |
| ReloadSwiss RS 70 | <<locked>> | 98% | 41,321 psi | 69% | 2287 fps | 95.2% |
| Rottweil R 901 | <<locked>> | 80% | 39,508 psi | 66% | 2126 fps | 99.8% |
| Rottweil R 902 | <<locked>> | 80% | 34,156 psi | 57% | 2047 fps | 97.5% |
| Rottweil R 903 | <<locked>> | 82% | 29,182 psi | 48% | 2001 fps | 95.2% |
| Shooters World Long Rifle | <<locked>> | 96% | 42,902 psi | 71% | 2221 fps | 95.6% |
| Shooters World Match Rifle | <<locked>> | 80% | 34,548 psi | 57% | 2103 fps | 99% |
| Shooters World Precision | <<locked>> | 80% | 32,082 psi | 53% | 2024 fps | 97% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 45,353 psi | 75% | 2211 fps | 99.3% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 47,892 psi | 80% | 2280 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 32,706 psi | 54% | 2090 fps | 95.4% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 45,643 psi | 76% | 2205 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 38,624 psi | 64% | 2146 fps | 95.3% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 34,809 psi | 58% | 2090 fps | 96.3% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 37,434 psi | 62% | 2054 fps | 99.7% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 30,574 psi | 51% | 1946 fps | 99.3% |
| Somchem S321 | <<locked>> | 80% | 40,886 psi | 68% | 2195 fps | 99.1% |
| Somchem S335 | <<locked>> | 80% | 36,854 psi | 61% | 2060 fps | 99.9% |
| Somchem S341 | <<locked>> | 80% | 35,737 psi | 59% | 2100 fps | 96.5% |
| Somchem S355 | <<locked>> | 82% | 30,371 psi | 50% | 2011 fps | 95.4% |
| Somchem S365 | <<locked>> | 90% | 28,050 psi | 47% | 2031 fps | 95.4% |
| Vihtavuori N130 | <<locked>> | 80% | 42,467 psi | 71% | 2116 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 37,463 psi | 62% | 2057 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 32,663 psi | 54% | 2037 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 33,736 psi | 56% | 2044 fps | 99.5% |
| Vihtavuori N150 | <<locked>> | 80% | 27,122 psi | 45% | 1923 fps | 95.6% |
| Vihtavuori N160 | <<locked>> | 94% | 37,507 psi | 62% | 2169 fps | 95.4% |
| Vihtavuori N530 | <<locked>> | 80% | 38,159 psi | 63% | 2126 fps | 98.5% |
| Vihtavuori N540 | <<locked>> | 80% | 32,372 psi | 54% | 2034 fps | 98.9% |
| Vihtavuori N550 | <<locked>> | 94% | 36,637 psi | 61% | 2175 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 31,720 psi | 53% | 2024 fps | 95.4% |
| Winchester 748 | <<locked>> | 80% | 36,883 psi | 61% | 2159 fps | 99% |
| Winchester StaBALL Match | <<locked>> | 80% | 34,040 psi | 57% | 2093 fps | 96.8% |
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 95 powders for .308 Win. loaded with the .308 | 205gr | Sierra GameKing. ReloadSwiss RS 60 delivers the highest muzzle velocity at 2,493 fps; across all powders the maximum-charge window runs from 1,391 fps to 2,493 fps. Accurate 4350 gives the best case fill at 100 %, and 95 of the 95 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 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, Hodgdon CFE223, ReloadSwiss RS 52 rank at the top here: for .308 Win. 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.