Load Specifications
Load data in caliber 8 x 57 IS with .323 | 220gr | Brenneke TOG bullet and 94 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 Alliant Reloder-17.
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: 23.62"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 86% | 50,981 psi | 90% | 2303 fps | 100% |
| Accurate 2460 | <<locked>> | 82% | 49,168 psi | 87% | 2323 fps | 100% |
| Accurate 2495 | <<locked>> | 90% | 48,022 psi | 85% | 2320 fps | 100% |
| Accurate 2520 | <<locked>> | 86% | 50,241 psi | 89% | 2375 fps | 100% |
| Accurate 4064 | <<locked>> | 92% | 48,022 psi | 85% | 2356 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 46,238 psi | 82% | 2402 fps | 98.3% |
| ADI AR 2206H | <<locked>> | 88% | 49,806 psi | 88% | 2382 fps | 99.5% |
| ADI AR 2208 | <<locked>> | 94% | 50,676 psi | 90% | 2379 fps | 99.2% |
| ADI Benchmark 8208 | <<locked>> | 86% | 49,153 psi | 87% | 2343 fps | 99.9% |
| Alliant AR-Comp | <<locked>> | 86% | 48,718 psi | 86% | 2326 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 82% | 50,401 psi | 89% | 2428 fps | 99.8% |
| Alliant Power Pro 2000-MR | <<locked>> | 90% | 48,733 psi | 86% | 2467 fps | 99% |
| Alliant Reloder- TS 15.5 | <<locked>> | 94% | 49,821 psi | 88% | 2398 fps | 99.8% |
| Alliant Reloder-10x | <<locked>> | 82% | 50,720 psi | 90% | 2306 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 92% | 50,691 psi | 90% | 2415 fps | 99.3% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 46,137 psi | 82% | 2405 fps | 98.4% |
| Alliant Reloder-17 | <<locked>> | 98% | 49,835 psi | 88% | 2490 fps | 99.8% |
| Baschieri & Pellagri 107 | <<locked>> | 88% | 49,008 psi | 87% | 2388 fps | 98.7% |
| Bofors RP3 | <<locked>> | 94% | 50,009 psi | 88% | 2411 fps | 99.9% |
| Bofors RP7 | <<locked>> | 98% | 51,169 psi | 90% | 2375 fps | 95.7% |
| Hodgdon Benchmark | <<locked>> | 84% | 48,399 psi | 86% | 2293 fps | 99.9% |
| Hodgdon BL-C2 | <<locked>> | 88% | 50,720 psi | 90% | 2411 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 84% | 49,066 psi | 87% | 2444 fps | 99.2% |
| Hodgdon H322 | <<locked>> | 82% | 49,676 psi | 88% | 2343 fps | 100% |
| Hodgdon H335 | <<locked>> | 82% | 50,430 psi | 89% | 2362 fps | 100% |
| Hodgdon H380 | <<locked>> | 92% | 48,254 psi | 85% | 2372 fps | 98.1% |
| Hodgdon H414ᴾ | <<locked>> | 100% | 49,879 psi | 88% | 2448 fps | 96.3% |
| Hodgdon H4895 | <<locked>> | 88% | 50,198 psi | 89% | 2392 fps | 99.7% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 42,366 psi | 75% | 2306 fps | 98.8% |
| Hodgdon LEVERevolution | <<locked>> | 90% | 48,646 psi | 86% | 2418 fps | 99.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,954 psi | 62% | 1434 fps | 100% |
| Hodgdon VARGET | <<locked>> | 88% | 48,501 psi | 86% | 2352 fps | 99.6% |
| IMR 3031 | <<locked>> | 88% | 49,342 psi | 87% | 2379 fps | 100% |
| IMR 4064 | <<locked>> | 92% | 50,067 psi | 89% | 2362 fps | 99.2% |
| IMR 4166 Enduron | <<locked>> | 90% | 50,763 psi | 90% | 2343 fps | 96.3% |
| IMR 4451 Enduron | <<locked>> | 96% | 49,966 psi | 88% | 2362 fps | 96% |
| IMR 4831ᴾ | <<locked>> | 100% | 44,324 psi | 78% | 2356 fps | 97.9% |
| IMR 4895 | <<locked>> | 90% | 48,805 psi | 86% | 2398 fps | 99.5% |
| IMR 8208 XBR | <<locked>> | 86% | 49,153 psi | 87% | 2343 fps | 99.9% |
| Lovex D073.5 | <<locked>> | 82% | 48,878 psi | 86% | 2329 fps | 100% |
| Lovex D073.6 | <<locked>> | 88% | 48,501 psi | 86% | 2362 fps | 100% |
| Lovex S060 | <<locked>> | 88% | 50,183 psi | 89% | 2323 fps | 99.5% |
| Lovex S062 | <<locked>> | 92% | 49,588 psi | 88% | 2362 fps | 99.9% |
| Lovex S065 | <<locked>> | 98% | 48,718 psi | 86% | 2356 fps | 97.3% |
| Lovex S070ᴾ | <<locked>> | 100% | 49,052 psi | 87% | 2379 fps | 96.3% |
| Norma 201 | <<locked>> | 88% | 48,849 psi | 86% | 2339 fps | 99.9% |
| Norma 202 | <<locked>> | 88% | 49,023 psi | 87% | 2343 fps | 100% |
| Norma 203B | <<locked>> | 92% | 49,864 psi | 88% | 2405 fps | 99.5% |
| Norma URPᴾ | <<locked>> | 100% | 46,398 psi | 82% | 2398 fps | 98.2% |
| Ramshot Big Game | <<locked>> | 92% | 49,966 psi | 88% | 2428 fps | 99.4% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 45,905 psi | 81% | 2392 fps | 96.2% |
| Ramshot TAC | <<locked>> | 86% | 49,226 psi | 87% | 2352 fps | 97.6% |
| Ramshot Wild Boar | <<locked>> | 86% | 48,370 psi | 86% | 2369 fps | 99.3% |
| Ramshot X-Terminator | <<locked>> | 84% | 50,067 psi | 89% | 2343 fps | 99.4% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,230 psi | 62% | 1467 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 48,718 psi | 86% | 2329 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 92% | 48,805 psi | 86% | 2356 fps | 96.6% |
| ReloadSwiss RS 52 | <<locked>> | 90% | 50,067 psi | 89% | 2464 fps | 99.3% |
| ReloadSwiss RS 60 | <<locked>> | 96% | 49,951 psi | 88% | 2500 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 46,050 psi | 81% | 2421 fps | 97.9% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 47,355 psi | 84% | 2441 fps | 97.5% |
| Rottweil R 901 | <<locked>> | 86% | 50,024 psi | 88% | 2326 fps | 100% |
| Rottweil R 902 | <<locked>> | 90% | 49,139 psi | 87% | 2336 fps | 99.9% |
| Rottweil R 903 | <<locked>> | 96% | 49,559 psi | 88% | 2395 fps | 99.8% |
| Rottweil R 907 | <<locked>> | 98% | 51,169 psi | 90% | 2375 fps | 95.7% |
| Shooters World Long Rifle | <<locked>> | 98% | 48,718 psi | 86% | 2356 fps | 97.3% |
| Shooters World Match Rifle | <<locked>> | 88% | 48,501 psi | 86% | 2362 fps | 100% |
| Shooters World Precision | <<locked>> | 92% | 49,588 psi | 88% | 2362 fps | 99.9% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 49,052 psi | 87% | 2379 fps | 96.3% |
| SNPE Vectan SP 11 | <<locked>> | 94% | 48,240 psi | 85% | 2408 fps | 99.3% |
| SNPE Vectan SP 7 | <<locked>> | 88% | 50,705 psi | 90% | 2379 fps | 98.3% |
| SNPE Vectan SP 9 | <<locked>> | 88% | 48,109 psi | 85% | 2356 fps | 99.3% |
| SNPE Vectan Tubal 3000 | <<locked>> | 88% | 50,647 psi | 90% | 2290 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 94% | 50,082 psi | 89% | 2290 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 98% | 48,907 psi | 86% | 2313 fps | 95.9% |
| Somchem S321 | <<locked>> | 84% | 49,937 psi | 88% | 2372 fps | 100% |
| Somchem S335 | <<locked>> | 88% | 50,009 psi | 88% | 2293 fps | 100% |
| Somchem S341 | <<locked>> | 88% | 50,053 psi | 88% | 2372 fps | 99.4% |
| Somchem S355 | <<locked>> | 96% | 50,386 psi | 89% | 2398 fps | 99.7% |
| Somchem S365ᴾ | <<locked>> | 100% | 41,394 psi | 73% | 2356 fps | 99.7% |
| Vihtavuori N130 | <<locked>> | 84% | 50,908 psi | 90% | 2267 fps | 100% |
| Vihtavuori N133 | <<locked>> | 88% | 50,691 psi | 90% | 2280 fps | 100% |
| Vihtavuori N135 | <<locked>> | 90% | 48,312 psi | 85% | 2313 fps | 100% |
| Vihtavuori N140 | <<locked>> | 90% | 49,342 psi | 87% | 2326 fps | 100% |
| Vihtavuori N150 | <<locked>> | 96% | 48,472 psi | 86% | 2339 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 48,776 psi | 86% | 2395 fps | 98.4% |
| Vihtavuori N530 | <<locked>> | 86% | 49,530 psi | 88% | 2343 fps | 99.9% |
| Vihtavuori N540 | <<locked>> | 92% | 50,778 psi | 90% | 2365 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 47,834 psi | 85% | 2402 fps | 98.2% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 34,548 psi | 61% | 2241 fps | 96% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 49,951 psi | 88% | 2388 fps | 99.7% |
| Winchester 748 | <<locked>> | 86% | 48,530 psi | 86% | 2382 fps | 100% |
| Winchester 760ᴾ | <<locked>> | 100% | 50,241 psi | 89% | 2451 fps | 96.4% |
| Winchester StaBALL Match | <<locked>> | 90% | 50,763 psi | 90% | 2408 fps | 99.8% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 23.62"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 80% | 42,264 psi | 75% | 2188 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 45,832 psi | 81% | 2277 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 34,824 psi | 62% | 2119 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 41,089 psi | 73% | 2241 fps | 99.9% |
| Accurate 4064 | <<locked>> | 80% | 32,938 psi | 58% | 2110 fps | 99.5% |
| Accurate 4350 | <<locked>> | 92% | 35,230 psi | 62% | 2211 fps | 95.5% |
| ADI AR 2206H | <<locked>> | 80% | 38,957 psi | 69% | 2205 fps | 97.8% |
| ADI AR 2208 | <<locked>> | 80% | 33,156 psi | 59% | 2077 fps | 95.2% |
| ADI Benchmark 8208 | <<locked>> | 80% | 40,973 psi | 72% | 2215 fps | 99.1% |
| Alliant AR-Comp | <<locked>> | 80% | 40,132 psi | 71% | 2211 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 47,427 psi | 84% | 2382 fps | 99.6% |
| Alliant Power Pro 2000-MR | 42.1 gr | 80% | 34,882 psi | 62% | 2208 fps | 95.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 32,198 psi | 57% | 2093 fps | 96.8% |
| Alliant Reloder-10x | <<locked>> | 80% | 47,848 psi | 85% | 2267 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 34,867 psi | 62% | 2146 fps | 96.1% |
| Alliant Reloder-16 | <<locked>> | 92% | 36,419 psi | 64% | 2224 fps | 95.7% |
| Alliant Reloder-17 | 43.6 gr | 84% | 31,734 psi | 56% | 2149 fps | 95.7% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 37,724 psi | 67% | 2201 fps | 96.3% |
| Bofors RP3 | <<locked>> | 80% | 31,488 psi | 56% | 2093 fps | 96.8% |
| Bofors RP7 | <<locked>> | 96% | 47,993 psi | 85% | 2329 fps | 95% |
| Hodgdon Benchmark | <<locked>> | 80% | 42,772 psi | 76% | 2205 fps | 99.6% |
| Hodgdon BL-C2 | <<locked>> | 80% | 38,827 psi | 69% | 2228 fps | 99.2% |
| Hodgdon CFE223 | <<locked>> | 80% | 42,641 psi | 75% | 2339 fps | 98.2% |
| Hodgdon H322 | <<locked>> | 80% | 46,543 psi | 82% | 2297 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 47,311 psi | 84% | 2323 fps | 100% |
| Hodgdon H380 | <<locked>> | 84% | 37,043 psi | 65% | 2182 fps | 95.3% |
| Hodgdon H414 | <<locked>> | 98% | 46,789 psi | 83% | 2398 fps | 95.6% |
| Hodgdon H4895 | <<locked>> | 80% | 39,218 psi | 69% | 2215 fps | 98.3% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 31,140 psi | 55% | 2087 fps | 95.6% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 34,969 psi | 62% | 2182 fps | 97.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,831 psi | 46% | 1276 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 37,608 psi | 66% | 2172 fps | 97.9% |
| IMR 3031 | <<locked>> | 80% | 38,072 psi | 67% | 2215 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 34,722 psi | 61% | 2103 fps | 96.1% |
| IMR 4166 Enduron | <<locked>> | 88% | 47,703 psi | 84% | 2297 fps | 95.6% |
| IMR 4451 Enduron | <<locked>> | 94% | 46,992 psi | 83% | 2316 fps | 95.3% |
| IMR 4831 | <<locked>> | 92% | 34,374 psi | 61% | 2175 fps | 95.2% |
| IMR 4895 | <<locked>> | 80% | 35,636 psi | 63% | 2172 fps | 97% |
| IMR 8208 XBR | <<locked>> | 80% | 40,973 psi | 72% | 2215 fps | 99.1% |
| Lovex D073.5 | <<locked>> | 80% | 45,571 psi | 81% | 2283 fps | 99.9% |
| Lovex D073.6 | <<locked>> | 80% | 37,333 psi | 66% | 2188 fps | 99.6% |
| Lovex S060 | <<locked>> | 80% | 39,624 psi | 70% | 2156 fps | 97.9% |
| Lovex S062 | <<locked>> | 80% | 34,490 psi | 61% | 2110 fps | 97.9% |
| Lovex S065 | <<locked>> | 92% | 40,669 psi | 72% | 2224 fps | 95.4% |
| Lovex S070 | <<locked>> | 98% | 46,050 psi | 81% | 2333 fps | 95.6% |
| Norma 201 | <<locked>> | 80% | 38,130 psi | 67% | 2165 fps | 98.7% |
| Norma 202 | <<locked>> | 80% | 38,145 psi | 67% | 2178 fps | 99.9% |
| Norma 203B | <<locked>> | 80% | 34,229 psi | 61% | 2136 fps | 96.5% |
| Norma URP | <<locked>> | 92% | 36,129 psi | 64% | 2218 fps | 95.5% |
| Ramshot Big Game | <<locked>> | 80% | 33,475 psi | 59% | 2139 fps | 95.9% |
| Ramshot Hunter | <<locked>> | 98% | 42,859 psi | 76% | 2339 fps | 95.4% |
| Ramshot TAC | <<locked>> | 80% | 40,524 psi | 72% | 2208 fps | 95.5% |
| Ramshot Wild Boar | <<locked>> | 80% | 39,871 psi | 70% | 2231 fps | 97.9% |
| Ramshot X-Terminator | <<locked>> | 80% | 44,077 psi | 78% | 2254 fps | 98.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,165 psi | 46% | 1309 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 45,745 psi | 81% | 2283 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 43,091 psi | 76% | 2264 fps | 95.2% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 35,694 psi | 63% | 2221 fps | 96.4% |
| ReloadSwiss RS 60 | 41.5 gr | 80% | 29,689 psi | 52% | 2106 fps | 97.5% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 37,739 psi | 67% | 2277 fps | 95.8% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 41,481 psi | 73% | 2336 fps | 95.8% |
| Rottweil R 901 | <<locked>> | 80% | 42,003 psi | 74% | 2208 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 36,230 psi | 64% | 2123 fps | 98.3% |
| Rottweil R 903 | <<locked>> | 80% | 29,602 psi | 52% | 2044 fps | 95.7% |
| Rottweil R 907 | <<locked>> | 96% | 47,993 psi | 85% | 2329 fps | 95% |
| Shooters World Long Rifle | <<locked>> | 92% | 40,669 psi | 72% | 2224 fps | 95.4% |
| Shooters World Match Rifle | <<locked>> | 80% | 37,333 psi | 66% | 2188 fps | 99.6% |
| Shooters World Precision | <<locked>> | 80% | 34,490 psi | 61% | 2110 fps | 97.9% |
| Shooters World SW4350 | <<locked>> | 98% | 46,050 psi | 81% | 2333 fps | 95.6% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 32,924 psi | 58% | 2133 fps | 95.8% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 38,566 psi | 68% | 2185 fps | 95.6% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 37,231 psi | 66% | 2172 fps | 97.3% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 39,769 psi | 70% | 2133 fps | 99.9% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 32,677 psi | 58% | 2021 fps | 99.7% |
| SNPE Vectan Tubal 7000 | <<locked>> | 96% | 45,672 psi | 81% | 2267 fps | 95.2% |
| Somchem S321 | <<locked>> | 80% | 43,830 psi | 77% | 2283 fps | 99.6% |
| Somchem S335 | <<locked>> | 80% | 39,262 psi | 69% | 2136 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 38,406 psi | 68% | 2188 fps | 97.5% |
| Somchem S355 | <<locked>> | 80% | 30,792 psi | 54% | 2054 fps | 95.8% |
| Somchem S365 | <<locked>> | 86% | 26,760 psi | 47% | 2031 fps | 95.1% |
| Vihtavuori N130 | <<locked>> | 80% | 45,049 psi | 80% | 2192 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 39,885 psi | 71% | 2133 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 35,244 psi | 62% | 2116 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 36,027 psi | 64% | 2123 fps | 99.8% |
| Vihtavuori N150 | <<locked>> | 80% | 29,080 psi | 51% | 2001 fps | 96.7% |
| Vihtavuori N160 | <<locked>> | 90% | 35,621 psi | 63% | 2172 fps | 95.1% |
| Vihtavuori N530 | <<locked>> | 80% | 40,770 psi | 72% | 2208 fps | 99.1% |
| Vihtavuori N540 | <<locked>> | 80% | 34,592 psi | 61% | 2113 fps | 99.4% |
| Vihtavuori N550 | <<locked>> | 92% | 37,057 psi | 66% | 2221 fps | 95.5% |
| Vihtavuori N555 | <<locked>> | 98% | 32,401 psi | 57% | 2195 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 31,807 psi | 56% | 2070 fps | 95.9% |
| Winchester 748 | <<locked>> | 80% | 39,697 psi | 70% | 2244 fps | 99.5% |
| Winchester 760 | <<locked>> | 98% | 47,123 psi | 83% | 2405 fps | 95.7% |
| Winchester StaBALL Match | <<locked>> | 80% | 36,434 psi | 64% | 2178 fps | 97.7% |
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 94 powders for 8 x 57 IS loaded with the .323 | 220gr | Brenneke TOG. ReloadSwiss RS 60 delivers the highest muzzle velocity at 2,500 fps; across all powders the maximum-charge window runs from 1,434 fps to 2,500 fps. Accurate 4350 gives the best case fill at 100 %, and 94 of the 94 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (390 MPa), the top charges use 61–90 %, leaving at least 10 % headroom. The 220.0 gr projectile in 0.323" calls for a 1:13.0 twist; slower twists will usually not stabilise this weight. Accurate 4350, Alliant Reloder-16, Hodgdon H414 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, Alliant Reloder-17 rank at the top here: for 8 x 57 IS with the .323 | 220gr | Brenneke TOG 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.