Load Specifications
Load data in caliber 8 x 57 IS with .323 | 220gr | Sierra GameKing bullet and 90 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.
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: 23.62"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 84% | 48,834 psi | 86% | 2283 fps | 100% |
| Accurate 2460 | <<locked>> | 82% | 50,067 psi | 89% | 2343 fps | 100% |
| Accurate 2495 | <<locked>> | 90% | 49,023 psi | 87% | 2336 fps | 100% |
| Accurate 2520 | <<locked>> | 84% | 47,993 psi | 85% | 2352 fps | 100% |
| Accurate 4064 | <<locked>> | 92% | 48,965 psi | 87% | 2375 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 47,645 psi | 84% | 2428 fps | 98.6% |
| ADI AR 2206H | <<locked>> | 88% | 50,618 psi | 89% | 2402 fps | 99.6% |
| ADI AR 2208 | <<locked>> | 92% | 48,631 psi | 86% | 2356 fps | 99% |
| ADI Benchmark 8208 | <<locked>> | 86% | 50,009 psi | 88% | 2362 fps | 99.9% |
| Alliant AR-Comp | <<locked>> | 86% | 49,850 psi | 88% | 2346 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 90% | 49,661 psi | 88% | 2493 fps | 99.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 94% | 50,937 psi | 90% | 2418 fps | 99.9% |
| Alliant Reloder-15 | <<locked>> | 90% | 48,414 psi | 86% | 2392 fps | 99.1% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 47,021 psi | 83% | 2431 fps | 98.7% |
| Alliant Reloder-17 | <<locked>> | 98% | 51,024 psi | 90% | 2516 fps | 99.9% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 33,417 psi | 59% | 2201 fps | 96.4% |
| Baschieri & Pellagri 107 | <<locked>> | 88% | 50,053 psi | 88% | 2411 fps | 99% |
| Bofors RP3 | <<locked>> | 94% | 51,140 psi | 90% | 2434 fps | 100% |
| Hodgdon Benchmark | <<locked>> | 84% | 49,269 psi | 87% | 2313 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 86% | 48,399 psi | 86% | 2385 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 84% | 49,966 psi | 88% | 2464 fps | 99.4% |
| Hodgdon H322 | <<locked>> | 82% | 50,720 psi | 90% | 2362 fps | 100% |
| Hodgdon H380 | <<locked>> | 92% | 48,979 psi | 87% | 2392 fps | 98.3% |
| Hodgdon H414ᴾ | <<locked>> | 100% | 51,097 psi | 90% | 2474 fps | 96.7% |
| Hodgdon H4895 | <<locked>> | 88% | 51,039 psi | 90% | 2411 fps | 99.8% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 43,207 psi | 76% | 2329 fps | 99.1% |
| Hodgdon LEVERevolution | <<locked>> | 90% | 49,443 psi | 87% | 2434 fps | 99.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,998 psi | 62% | 1444 fps | 100% |
| Hodgdon VARGET | <<locked>> | 88% | 49,298 psi | 87% | 2372 fps | 99.7% |
| IMR 3031 | <<locked>> | 88% | 50,372 psi | 89% | 2398 fps | 100% |
| IMR 4064 | <<locked>> | 92% | 51,184 psi | 90% | 2385 fps | 99.4% |
| IMR 4166 Enduron | <<locked>> | 88% | 48,718 psi | 86% | 2323 fps | 96% |
| IMR 4451 Enduron | <<locked>> | 96% | 50,894 psi | 90% | 2385 fps | 96.4% |
| IMR 4831ᴾ | <<locked>> | 100% | 45,266 psi | 80% | 2379 fps | 98.2% |
| IMR 4895 | <<locked>> | 90% | 49,588 psi | 88% | 2418 fps | 99.6% |
| IMR 8208 XBR | <<locked>> | 86% | 50,009 psi | 88% | 2362 fps | 99.9% |
| Lovex D073.5 | <<locked>> | 82% | 49,763 psi | 88% | 2349 fps | 100% |
| Lovex D073.6 | <<locked>> | 88% | 49,690 psi | 88% | 2385 fps | 100% |
| Lovex S060 | <<locked>> | 88% | 50,937 psi | 90% | 2343 fps | 99.6% |
| Lovex S062 | <<locked>> | 92% | 50,676 psi | 90% | 2385 fps | 100% |
| Lovex S065 | <<locked>> | 98% | 49,705 psi | 88% | 2375 fps | 97.6% |
| Lovex S070ᴾ | <<locked>> | 100% | 49,966 psi | 88% | 2402 fps | 96.6% |
| Norma 201 | <<locked>> | 88% | 49,719 psi | 88% | 2359 fps | 99.9% |
| Norma 202 | <<locked>> | 88% | 49,908 psi | 88% | 2362 fps | 100% |
| Norma 203B | <<locked>> | 92% | 50,691 psi | 90% | 2425 fps | 99.6% |
| Norma URPᴾ | <<locked>> | 100% | 47,340 psi | 84% | 2421 fps | 98.4% |
| Ramshot Big Game | <<locked>> | 92% | 50,966 psi | 90% | 2448 fps | 99.6% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 46,630 psi | 82% | 2415 fps | 96.6% |
| Ramshot TAC | <<locked>> | 86% | 50,227 psi | 89% | 2375 fps | 97.9% |
| Ramshot Wild Boar | <<locked>> | 86% | 49,429 psi | 87% | 2392 fps | 99.5% |
| Ramshot X-Terminator | <<locked>> | 84% | 51,111 psi | 90% | 2365 fps | 99.5% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,288 psi | 62% | 1476 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 49,603 psi | 88% | 2346 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 92% | 49,748 psi | 88% | 2379 fps | 96.9% |
| ReloadSwiss RS 52 | <<locked>> | 88% | 48,008 psi | 85% | 2444 fps | 99.1% |
| ReloadSwiss RS 60 | <<locked>> | 96% | 50,850 psi | 90% | 2520 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 47,210 psi | 83% | 2448 fps | 98.3% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 48,037 psi | 85% | 2464 fps | 97.8% |
| Rottweil R 901 | <<locked>> | 86% | 50,691 psi | 90% | 2343 fps | 100% |
| Rottweil R 902 | <<locked>> | 90% | 49,995 psi | 88% | 2356 fps | 99.9% |
| Rottweil R 903 | <<locked>> | 96% | 50,662 psi | 90% | 2421 fps | 99.9% |
| Shooters World Long Rifle | <<locked>> | 98% | 49,705 psi | 88% | 2375 fps | 97.6% |
| Shooters World Match Rifle | <<locked>> | 88% | 49,690 psi | 88% | 2385 fps | 100% |
| Shooters World Precision | <<locked>> | 92% | 50,676 psi | 90% | 2385 fps | 100% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 49,966 psi | 88% | 2402 fps | 96.6% |
| SNPE Vectan SP 11 | <<locked>> | 94% | 49,211 psi | 87% | 2431 fps | 99.5% |
| SNPE Vectan SP 7 | <<locked>> | 86% | 48,298 psi | 85% | 2352 fps | 98% |
| SNPE Vectan SP 9 | <<locked>> | 88% | 49,153 psi | 87% | 2379 fps | 99.5% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 48,689 psi | 86% | 2274 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 92% | 48,066 psi | 85% | 2270 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 98% | 49,879 psi | 88% | 2336 fps | 96.3% |
| Somchem S321 | <<locked>> | 84% | 50,749 psi | 90% | 2392 fps | 100% |
| Somchem S335 | <<locked>> | 88% | 50,850 psi | 90% | 2313 fps | 100% |
| Somchem S341 | <<locked>> | 88% | 51,126 psi | 90% | 2395 fps | 99.6% |
| Somchem S355 | <<locked>> | 94% | 48,370 psi | 86% | 2379 fps | 99.6% |
| Somchem S365ᴾ | <<locked>> | 100% | 42,264 psi | 75% | 2379 fps | 99.8% |
| Vihtavuori N130 | <<locked>> | 82% | 48,762 psi | 86% | 2247 fps | 100% |
| Vihtavuori N133 | <<locked>> | 86% | 48,776 psi | 86% | 2264 fps | 100% |
| Vihtavuori N135 | <<locked>> | 90% | 49,298 psi | 87% | 2333 fps | 100% |
| Vihtavuori N140 | <<locked>> | 90% | 50,183 psi | 89% | 2343 fps | 100% |
| Vihtavuori N150 | <<locked>> | 96% | 49,516 psi | 88% | 2362 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 50,067 psi | 89% | 2421 fps | 98.7% |
| Vihtavuori N530 | <<locked>> | 86% | 50,386 psi | 89% | 2362 fps | 100% |
| Vihtavuori N540 | <<locked>> | 90% | 48,443 psi | 86% | 2343 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 49,023 psi | 87% | 2428 fps | 98.5% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 35,346 psi | 62% | 2264 fps | 96.4% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 50,937 psi | 90% | 2411 fps | 99.9% |
| Winchester 748 | <<locked>> | 86% | 49,385 psi | 87% | 2402 fps | 100% |
| Winchester 760ᴾ | <<locked>> | 100% | 51,097 psi | 90% | 2474 fps | 96.7% |
| Winchester StaBALL Match | <<locked>> | 88% | 48,399 psi | 86% | 2382 fps | 99.7% |
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% | 42,975 psi | 76% | 2205 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 46,760 psi | 83% | 2300 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 35,563 psi | 63% | 2136 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 41,974 psi | 74% | 2264 fps | 100% |
| Accurate 4064 | <<locked>> | 80% | 33,634 psi | 59% | 2126 fps | 99.7% |
| Accurate 4350 | <<locked>> | 90% | 33,620 psi | 59% | 2188 fps | 95.1% |
| ADI AR 2206H | <<locked>> | 80% | 39,552 psi | 70% | 2221 fps | 98% |
| ADI AR 2208 | <<locked>> | 80% | 33,692 psi | 60% | 2093 fps | 95.6% |
| ADI Benchmark 8208 | <<locked>> | 80% | 41,539 psi | 73% | 2234 fps | 99.3% |
| Alliant AR-Comp | <<locked>> | 80% | 40,915 psi | 72% | 2228 fps | 100% |
| Alliant Power Pro 2000-MR | 42.9 gr | 80% | 35,505 psi | 63% | 2231 fps | 95.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 32,779 psi | 58% | 2110 fps | 97.2% |
| Alliant Reloder-15 | <<locked>> | 80% | 35,462 psi | 63% | 2165 fps | 96.4% |
| Alliant Reloder-16 | <<locked>> | 90% | 34,867 psi | 62% | 2198 fps | 95.2% |
| Alliant Reloder-17 | 43.3 gr | 82% | 30,226 psi | 53% | 2119 fps | 95.2% |
| Alliant Reloder-23 | <<locked>> | 98% | 31,444 psi | 56% | 2156 fps | 95.5% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 38,450 psi | 68% | 2224 fps | 96.7% |
| Bofors RP3 | <<locked>> | 80% | 32,068 psi | 57% | 2110 fps | 97.1% |
| Hodgdon Benchmark | <<locked>> | 80% | 43,627 psi | 77% | 2228 fps | 99.7% |
| Hodgdon BL-C2 | <<locked>> | 80% | 39,653 psi | 70% | 2247 fps | 99.4% |
| Hodgdon CFE223 | <<locked>> | 80% | 43,468 psi | 77% | 2362 fps | 98.5% |
| Hodgdon H322 | <<locked>> | 80% | 47,253 psi | 84% | 2316 fps | 100% |
| Hodgdon H380 | <<locked>> | 84% | 37,811 psi | 67% | 2205 fps | 95.7% |
| Hodgdon H414 | <<locked>> | 96% | 44,817 psi | 79% | 2375 fps | 95.2% |
| Hodgdon H4895 | <<locked>> | 80% | 39,842 psi | 70% | 2234 fps | 98.6% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 29,979 psi | 53% | 2067 fps | 95.3% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 35,694 psi | 63% | 2205 fps | 98.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,020 psi | 46% | 1286 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 38,421 psi | 68% | 2195 fps | 98.2% |
| IMR 3031 | <<locked>> | 80% | 38,870 psi | 69% | 2231 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 35,317 psi | 62% | 2123 fps | 96.4% |
| IMR 4166 Enduron | <<locked>> | 86% | 45,585 psi | 81% | 2274 fps | 95.2% |
| IMR 4451 Enduron | <<locked>> | 92% | 45,107 psi | 80% | 2297 fps | 95% |
| IMR 4831 | <<locked>> | 92% | 34,998 psi | 62% | 2195 fps | 95.6% |
| IMR 4895 | <<locked>> | 80% | 36,245 psi | 64% | 2192 fps | 97.3% |
| IMR 8208 XBR | <<locked>> | 80% | 41,539 psi | 73% | 2234 fps | 99.3% |
| Lovex D073.5 | <<locked>> | 80% | 46,456 psi | 82% | 2303 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 37,942 psi | 67% | 2205 fps | 99.7% |
| Lovex S060 | <<locked>> | 80% | 40,161 psi | 71% | 2172 fps | 98.2% |
| Lovex S062 | <<locked>> | 80% | 35,056 psi | 62% | 2129 fps | 98.2% |
| Lovex S065 | <<locked>> | 90% | 38,870 psi | 69% | 2201 fps | 95% |
| Lovex S070 | <<locked>> | 96% | 44,193 psi | 78% | 2313 fps | 95.3% |
| Norma 201 | <<locked>> | 80% | 38,769 psi | 69% | 2185 fps | 98.9% |
| Norma 202 | <<locked>> | 80% | 38,754 psi | 69% | 2195 fps | 99.9% |
| Norma 203B | <<locked>> | 80% | 34,824 psi | 62% | 2156 fps | 96.9% |
| Norma URP | <<locked>> | 90% | 34,519 psi | 61% | 2192 fps | 95.1% |
| Ramshot Big Game | <<locked>> | 80% | 34,113 psi | 60% | 2162 fps | 96.3% |
| Ramshot Hunter | <<locked>> | 96% | 41,031 psi | 73% | 2316 fps | 95% |
| Ramshot TAC | <<locked>> | 80% | 41,234 psi | 73% | 2231 fps | 95.9% |
| Ramshot Wild Boar | <<locked>> | 80% | 40,379 psi | 71% | 2247 fps | 98.2% |
| Ramshot X-Terminator | <<locked>> | 80% | 44,846 psi | 79% | 2274 fps | 98.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,121 psi | 46% | 1316 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 46,615 psi | 82% | 2306 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 43,758 psi | 77% | 2283 fps | 95.5% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 36,492 psi | 65% | 2244 fps | 96.8% |
| ReloadSwiss RS 60 | 42.3 gr | 80% | 30,298 psi | 54% | 2129 fps | 97.9% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 35,998 psi | 64% | 2251 fps | 95.3% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 39,436 psi | 70% | 2310 fps | 95.3% |
| Rottweil R 901 | <<locked>> | 80% | 42,685 psi | 75% | 2224 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 36,825 psi | 65% | 2142 fps | 98.5% |
| Rottweil R 903 | <<locked>> | 80% | 30,371 psi | 54% | 2067 fps | 96.1% |
| Shooters World Long Rifle | <<locked>> | 90% | 38,870 psi | 69% | 2201 fps | 95% |
| Shooters World Match Rifle | <<locked>> | 80% | 37,942 psi | 67% | 2205 fps | 99.7% |
| Shooters World Precision | <<locked>> | 80% | 35,056 psi | 62% | 2129 fps | 98.2% |
| Shooters World SW4350 | <<locked>> | 96% | 44,193 psi | 78% | 2313 fps | 95.3% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 31,372 psi | 55% | 2106 fps | 95.3% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 39,320 psi | 70% | 2205 fps | 96% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 38,029 psi | 67% | 2195 fps | 97.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 40,408 psi | 71% | 2152 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 33,257 psi | 59% | 2037 fps | 99.8% |
| SNPE Vectan Tubal 7000 | <<locked>> | 96% | 46,702 psi | 83% | 2290 fps | 95.6% |
| Somchem S321 | <<locked>> | 80% | 44,643 psi | 79% | 2303 fps | 99.7% |
| Somchem S335 | <<locked>> | 80% | 39,856 psi | 70% | 2156 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 39,160 psi | 69% | 2211 fps | 97.8% |
| Somchem S355 | <<locked>> | 80% | 31,357 psi | 55% | 2073 fps | 96.2% |
| Somchem S365 | <<locked>> | 86% | 27,311 psi | 48% | 2057 fps | 95.6% |
| Vihtavuori N130 | <<locked>> | 80% | 45,745 psi | 81% | 2208 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 40,553 psi | 72% | 2149 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 35,955 psi | 64% | 2136 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 36,825 psi | 65% | 2142 fps | 99.9% |
| Vihtavuori N150 | <<locked>> | 80% | 29,776 psi | 53% | 2024 fps | 97.1% |
| Vihtavuori N160 | <<locked>> | 90% | 36,245 psi | 64% | 2195 fps | 95.6% |
| Vihtavuori N530 | <<locked>> | 80% | 41,379 psi | 73% | 2228 fps | 99.3% |
| Vihtavuori N540 | <<locked>> | 80% | 35,360 psi | 63% | 2133 fps | 99.6% |
| Vihtavuori N550 | <<locked>> | 90% | 35,433 psi | 63% | 2195 fps | 95.1% |
| Vihtavuori N555 | <<locked>> | 98% | 33,170 psi | 59% | 2218 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 30,255 psi | 53% | 2041 fps | 95.4% |
| Winchester 748 | <<locked>> | 80% | 40,538 psi | 72% | 2267 fps | 99.7% |
| Winchester 760 | <<locked>> | 96% | 45,107 psi | 80% | 2382 fps | 95.3% |
| Winchester StaBALL Match | <<locked>> | 80% | 37,202 psi | 66% | 2198 fps | 98.1% |
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 8 x 57 IS loaded with the .323 | 220gr | Sierra GameKing. ReloadSwiss RS 60 delivers the highest muzzle velocity at 2,520 fps; across all powders the maximum-charge window runs from 1,444 fps to 2,520 fps. Accurate 3100 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 (390 MPa), the top charges use 52–90 %, 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 3100, Accurate 4350, ADI AR 2209 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 | Sierra GameKing they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate 3100, ADI AR 2209, Alliant Reloder-19 burn incompletely and react more sensitively to barrel length and temperature. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.