Load Specifications
Load data in caliber 8 x 57 IS with .323 | 220gr | A-Square MONO RN 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 Reloder-17, ReloadSwiss RS 60 and ReloadSwiss RS 70.
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>> | 82% | 49,980 psi | 88% | 2333 fps | 100% |
| Accurate 2495 | <<locked>> | 88% | 51,169 psi | 90% | 2392 fps | 100% |
| Accurate 2520 | <<locked>> | 82% | 49,487 psi | 87% | 2405 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 50,778 psi | 90% | 2388 fps | 96.4% |
| Accurate 4064 | <<locked>> | 88% | 48,095 psi | 85% | 2392 fps | 100% |
| Accurate 4350 | <<locked>> | 98% | 50,096 psi | 89% | 2500 fps | 99.3% |
| ADI AR 2206H | <<locked>> | 84% | 49,023 psi | 87% | 2418 fps | 99.7% |
| ADI AR 2208 | <<locked>> | 90% | 49,777 psi | 88% | 2415 fps | 99.5% |
| ADI Benchmark 8208 | <<locked>> | 82% | 48,269 psi | 85% | 2375 fps | 100% |
| Alliant AR-Comp | <<locked>> | 82% | 48,443 psi | 86% | 2356 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 86% | 47,834 psi | 85% | 2510 fps | 99.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 90% | 49,632 psi | 88% | 2438 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 88% | 50,169 psi | 89% | 2454 fps | 99.6% |
| Alliant Reloder-16 | <<locked>> | 98% | 48,863 psi | 86% | 2507 fps | 99.4% |
| Alliant Reloder-17 | <<locked>> | 94% | 49,661 psi | 88% | 2539 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 36,956 psi | 65% | 2320 fps | 98.4% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 40,959 psi | 72% | 2454 fps | 97.5% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 48,196 psi | 85% | 2425 fps | 99.2% |
| Bofors RP3 | <<locked>> | 90% | 49,603 psi | 88% | 2448 fps | 100% |
| Bofors RP7 | <<locked>> | 94% | 50,459 psi | 89% | 2421 fps | 96.6% |
| Hodgdon Benchmark | <<locked>> | 82% | 50,067 psi | 89% | 2362 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 84% | 50,053 psi | 88% | 2444 fps | 100% |
| Hodgdon H380 | <<locked>> | 90% | 50,865 psi | 90% | 2461 fps | 99.1% |
| Hodgdon H414 | <<locked>> | 96% | 49,893 psi | 88% | 2497 fps | 97.3% |
| Hodgdon H4350 | <<locked>> | 94% | 51,111 psi | 90% | 2467 fps | 96.1% |
| Hodgdon H4895 | <<locked>> | 84% | 49,458 psi | 87% | 2425 fps | 99.9% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 48,109 psi | 85% | 2441 fps | 99.9% |
| Hodgdon LEVERevolution | <<locked>> | 86% | 48,167 psi | 85% | 2451 fps | 100% |
| Hodgdon Superformance | <<locked>> | 96% | 50,314 psi | 89% | 2526 fps | 96.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,433 psi | 63% | 1486 fps | 100% |
| Hodgdon VARGET | <<locked>> | 86% | 50,444 psi | 89% | 2425 fps | 99.9% |
| IMR 3031 | <<locked>> | 84% | 49,081 psi | 87% | 2411 fps | 100% |
| IMR 4064 | <<locked>> | 88% | 49,559 psi | 88% | 2405 fps | 99.6% |
| IMR 4166 Enduron | <<locked>> | 86% | 49,647 psi | 88% | 2382 fps | 97% |
| IMR 4350 | <<locked>> | 98% | 50,111 psi | 89% | 2441 fps | 96.6% |
| IMR 4451 Enduron | <<locked>> | 92% | 49,139 psi | 87% | 2405 fps | 96.8% |
| IMR 4831ᴾ | <<locked>> | 100% | 50,981 psi | 90% | 2497 fps | 99.5% |
| IMR 4895 | <<locked>> | 86% | 48,283 psi | 85% | 2434 fps | 99.7% |
| IMR 8208 XBR | <<locked>> | 82% | 48,269 psi | 85% | 2375 fps | 100% |
| Lovex D073.6 | <<locked>> | 84% | 48,182 psi | 85% | 2395 fps | 100% |
| Lovex S060 | <<locked>> | 84% | 48,907 psi | 86% | 2356 fps | 99.7% |
| Lovex S062 | <<locked>> | 88% | 49,313 psi | 87% | 2402 fps | 100% |
| Lovex S065 | <<locked>> | 94% | 48,399 psi | 86% | 2398 fps | 98.1% |
| Lovex S070 | <<locked>> | 96% | 49,052 psi | 87% | 2428 fps | 97.2% |
| Norma 201 | <<locked>> | 86% | 51,111 psi | 90% | 2415 fps | 100% |
| Norma 202 | <<locked>> | 84% | 48,225 psi | 85% | 2372 fps | 100% |
| Norma 203B | <<locked>> | 88% | 49,429 psi | 87% | 2444 fps | 99.8% |
| Norma URP | <<locked>> | 98% | 49,879 psi | 88% | 2497 fps | 99.3% |
| Ramshot Big Game | <<locked>> | 88% | 49,443 psi | 87% | 2464 fps | 99.7% |
| Ramshot Hunter | <<locked>> | 98% | 48,544 psi | 86% | 2487 fps | 97.8% |
| Ramshot TAC | <<locked>> | 82% | 48,008 psi | 85% | 2382 fps | 98.1% |
| Ramshot Wild Boar | <<locked>> | 84% | 50,865 psi | 90% | 2451 fps | 99.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,723 psi | 63% | 1519 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 48,153 psi | 85% | 2398 fps | 97.4% |
| ReloadSwiss RS 52 | <<locked>> | 86% | 49,937 psi | 88% | 2507 fps | 99.6% |
| ReloadSwiss RS 60 | <<locked>> | 92% | 49,400 psi | 87% | 2539 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 98% | 49,647 psi | 88% | 2520 fps | 99.1% |
| ReloadSwiss RS 70 | <<locked>> | 98% | 50,009 psi | 88% | 2543 fps | 98.9% |
| Rottweil R 901 | <<locked>> | 82% | 49,197 psi | 87% | 2356 fps | 100% |
| Rottweil R 902 | <<locked>> | 86% | 48,515 psi | 86% | 2372 fps | 100% |
| Rottweil R 903 | <<locked>> | 92% | 49,734 psi | 88% | 2441 fps | 100% |
| Rottweil R 907 | <<locked>> | 94% | 50,459 psi | 89% | 2421 fps | 96.6% |
| Shooters World Long Rifle | <<locked>> | 94% | 48,399 psi | 86% | 2398 fps | 98.1% |
| Shooters World Match Rifle | <<locked>> | 84% | 48,182 psi | 85% | 2395 fps | 100% |
| Shooters World Precision | <<locked>> | 88% | 49,313 psi | 87% | 2402 fps | 100% |
| Shooters World SW4350 | <<locked>> | 96% | 49,052 psi | 87% | 2428 fps | 97.2% |
| SNPE Vectan SP 11 | <<locked>> | 90% | 47,863 psi | 85% | 2448 fps | 99.7% |
| SNPE Vectan SP 7 | <<locked>> | 84% | 49,661 psi | 88% | 2411 fps | 98.8% |
| SNPE Vectan SP 9 | <<locked>> | 86% | 50,357 psi | 89% | 2434 fps | 99.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 49,400 psi | 87% | 2320 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 90% | 49,472 psi | 87% | 2323 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 48,167 psi | 85% | 2352 fps | 96.7% |
| Somchem S335 | <<locked>> | 84% | 49,023 psi | 87% | 2323 fps | 100% |
| Somchem S341 | <<locked>> | 84% | 49,110 psi | 87% | 2405 fps | 99.7% |
| Somchem S355 | <<locked>> | 92% | 50,212 psi | 89% | 2441 fps | 99.9% |
| Somchem S365ᴾ | <<locked>> | 100% | 47,268 psi | 84% | 2493 fps | 100% |
| Vihtavuori N133 | <<locked>> | 84% | 49,647 psi | 88% | 2310 fps | 100% |
| Vihtavuori N135 | <<locked>> | 88% | 50,821 psi | 90% | 2382 fps | 100% |
| Vihtavuori N140 | <<locked>> | 86% | 48,747 psi | 86% | 2359 fps | 100% |
| Vihtavuori N150 | <<locked>> | 92% | 48,385 psi | 86% | 2382 fps | 100% |
| Vihtavuori N160 | <<locked>> | 96% | 48,820 psi | 86% | 2444 fps | 99% |
| Vihtavuori N530 | <<locked>> | 82% | 48,443 psi | 86% | 2372 fps | 100% |
| Vihtavuori N540 | <<locked>> | 88% | 50,096 psi | 89% | 2398 fps | 100% |
| Vihtavuori N550 | <<locked>> | 98% | 51,126 psi | 90% | 2493 fps | 99.2% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 40,176 psi | 71% | 2388 fps | 98.4% |
| Winchester 6.5 StaBALL | <<locked>> | 96% | 49,211 psi | 87% | 2431 fps | 100% |
| Winchester 748 | <<locked>> | 82% | 47,863 psi | 85% | 2415 fps | 100% |
| Winchester 760 | <<locked>> | 96% | 50,140 psi | 89% | 2503 fps | 97.3% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 33,141 psi | 59% | 2316 fps | 98% |
| Winchester StaBALL Match | <<locked>> | 86% | 50,125 psi | 89% | 2444 fps | 100% |
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% | 46,920 psi | 83% | 2290 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 39,624 psi | 70% | 2231 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 46,441 psi | 82% | 2362 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 47,747 psi | 84% | 2343 fps | 95.7% |
| Accurate 4064 | <<locked>> | 80% | 37,492 psi | 66% | 2224 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 33,344 psi | 59% | 2208 fps | 95.7% |
| ADI AR 2206H | <<locked>> | 80% | 43,294 psi | 77% | 2323 fps | 99.2% |
| ADI AR 2208 | <<locked>> | 80% | 36,883 psi | 65% | 2195 fps | 97.3% |
| ADI Benchmark 8208 | <<locked>> | 80% | 45,368 psi | 80% | 2333 fps | 99.9% |
| Alliant AR-Comp | <<locked>> | 80% | 45,324 psi | 80% | 2316 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 39,160 psi | 69% | 2352 fps | 97.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 36,201 psi | 64% | 2211 fps | 98.6% |
| Alliant Reloder-15 | <<locked>> | 80% | 39,073 psi | 69% | 2267 fps | 98% |
| Alliant Reloder-16 | <<locked>> | 86% | 33,924 psi | 60% | 2218 fps | 95.8% |
| Alliant Reloder-17 | 46.5 gr | 80% | 31,169 psi | 55% | 2182 fps | 96.6% |
| Alliant Reloder-23 | <<locked>> | 92% | 29,138 psi | 52% | 2133 fps | 95.3% |
| Alliant Reloder-26 | <<locked>> | 96% | 35,665 psi | 63% | 2343 fps | 95.5% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 42,134 psi | 74% | 2326 fps | 98.2% |
| Bofors RP3 | <<locked>> | 80% | 35,694 psi | 63% | 2215 fps | 98.6% |
| Bofors RP7 | <<locked>> | 90% | 44,527 psi | 79% | 2326 fps | 95.2% |
| Hodgdon Benchmark | <<locked>> | 80% | 47,123 psi | 83% | 2320 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 43,976 psi | 78% | 2352 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 36,622 psi | 65% | 2215 fps | 96.1% |
| Hodgdon H414 | <<locked>> | 90% | 41,060 psi | 73% | 2352 fps | 95% |
| Hodgdon H4350 | <<locked>> | 92% | 48,066 psi | 85% | 2421 fps | 95.3% |
| Hodgdon H4895 | <<locked>> | 80% | 43,700 psi | 77% | 2333 fps | 99.5% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 29,327 psi | 52% | 2087 fps | 95.9% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 39,349 psi | 70% | 2306 fps | 99.3% |
| Hodgdon Superformance | <<locked>> | 92% | 43,918 psi | 78% | 2418 fps | 95% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,252 psi | 46% | 1322 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 41,814 psi | 74% | 2290 fps | 99.3% |
| IMR 3031 | <<locked>> | 80% | 43,236 psi | 76% | 2329 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 38,696 psi | 68% | 2224 fps | 98% |
| IMR 4166 Enduron | <<locked>> | 82% | 43,700 psi | 77% | 2287 fps | 95.6% |
| IMR 4350 | <<locked>> | 94% | 44,309 psi | 78% | 2349 fps | 95.2% |
| IMR 4451 Enduron | <<locked>> | 88% | 43,511 psi | 77% | 2310 fps | 95.5% |
| IMR 4831 | <<locked>> | 86% | 32,445 psi | 57% | 2172 fps | 95.4% |
| IMR 4895 | <<locked>> | 80% | 40,016 psi | 71% | 2297 fps | 98.7% |
| IMR 8208 XBR | <<locked>> | 80% | 45,368 psi | 80% | 2333 fps | 99.9% |
| Lovex D073.6 | <<locked>> | 80% | 42,119 psi | 74% | 2306 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 43,526 psi | 77% | 2270 fps | 99.2% |
| Lovex S062 | <<locked>> | 80% | 38,595 psi | 68% | 2228 fps | 99.3% |
| Lovex S065 | <<locked>> | 86% | 38,072 psi | 67% | 2221 fps | 95.6% |
| Lovex S070 | <<locked>> | 90% | 40,727 psi | 72% | 2290 fps | 95.1% |
| Norma 201 | <<locked>> | 80% | 42,380 psi | 75% | 2283 fps | 99.7% |
| Norma 202 | <<locked>> | 80% | 42,496 psi | 75% | 2287 fps | 100% |
| Norma 203B | <<locked>> | 80% | 38,450 psi | 68% | 2257 fps | 98.4% |
| Norma URP | <<locked>> | 86% | 33,924 psi | 60% | 2211 fps | 95.7% |
| Ramshot Big Game | <<locked>> | 80% | 37,826 psi | 67% | 2270 fps | 98.1% |
| Ramshot Hunter | <<locked>> | 92% | 40,176 psi | 71% | 2343 fps | 95.7% |
| Ramshot TAC | <<locked>> | 80% | 44,991 psi | 80% | 2336 fps | 97.6% |
| Ramshot Wild Boar | <<locked>> | 80% | 44,469 psi | 79% | 2352 fps | 99.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,600 psi | 47% | 1355 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 39,639 psi | 70% | 2251 fps | 95.2% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 40,698 psi | 72% | 2356 fps | 98.4% |
| ReloadSwiss RS 60 | 46.5 gr | 80% | 33,185 psi | 59% | 2241 fps | 99.4% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 33,228 psi | 59% | 2224 fps | 95.1% |
| ReloadSwiss RS 70 | 52 gr | 88% | 35,882 psi | 63% | 2277 fps | 95% |
| Rottweil R 901 | <<locked>> | 80% | 46,253 psi | 82% | 2313 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 40,408 psi | 71% | 2241 fps | 99.5% |
| Rottweil R 903 | <<locked>> | 80% | 33,750 psi | 60% | 2169 fps | 97.9% |
| Rottweil R 907 | <<locked>> | 90% | 44,527 psi | 79% | 2326 fps | 95.2% |
| Shooters World Long Rifle | <<locked>> | 86% | 38,072 psi | 67% | 2221 fps | 95.6% |
| Shooters World Match Rifle | <<locked>> | 80% | 42,119 psi | 74% | 2306 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 38,595 psi | 68% | 2228 fps | 99.3% |
| Shooters World SW4350 | <<locked>> | 90% | 40,727 psi | 72% | 2290 fps | 95.1% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 34,592 psi | 61% | 2208 fps | 97.3% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 43,308 psi | 77% | 2313 fps | 97.7% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 41,669 psi | 74% | 2297 fps | 98.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 43,714 psi | 77% | 2238 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 36,245 psi | 64% | 2123 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 42,366 psi | 75% | 2264 fps | 95.3% |
| Somchem S335 | <<locked>> | 80% | 43,395 psi | 77% | 2241 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 42,946 psi | 76% | 2310 fps | 99.1% |
| Somchem S355 | <<locked>> | 80% | 34,635 psi | 61% | 2175 fps | 97.9% |
| Somchem S365 | <<locked>> | 80% | 25,048 psi | 44% | 2021 fps | 95.2% |
| Vihtavuori N133 | <<locked>> | 80% | 43,976 psi | 78% | 2231 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 39,581 psi | 70% | 2221 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 40,364 psi | 71% | 2234 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 32,924 psi | 58% | 2119 fps | 98.6% |
| Vihtavuori N160 | <<locked>> | 84% | 33,272 psi | 59% | 2165 fps | 95.3% |
| Vihtavuori N530 | <<locked>> | 80% | 45,165 psi | 80% | 2323 fps | 99.9% |
| Vihtavuori N540 | <<locked>> | 80% | 38,711 psi | 68% | 2224 fps | 100% |
| Vihtavuori N550 | <<locked>> | 86% | 34,722 psi | 61% | 2215 fps | 95.7% |
| Vihtavuori N555 | <<locked>> | 92% | 31,024 psi | 55% | 2201 fps | 95.5% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 29,138 psi | 52% | 2051 fps | 95.8% |
| Winchester 748 | <<locked>> | 80% | 44,657 psi | 79% | 2365 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 41,278 psi | 73% | 2356 fps | 95.1% |
| Winchester StaBALL HD | <<locked>> | 96% | 29,196 psi | 52% | 2201 fps | 95.8% |
| Winchester StaBALL Match | <<locked>> | 80% | 41,089 psi | 73% | 2303 fps | 99.2% |
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 107 powders for 8 x 57 IS loaded with the .323 | 220gr | A-Square MONO RN. ReloadSwiss RS 70 delivers the highest muzzle velocity at 2,543 fps; across all powders the maximum-charge window runs from 1,486 fps to 2,543 fps. Accurate 3100 gives the best case fill at 100 %, and 107 of the 107 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (390 MPa), the top charges use 56–90 %, leaving at least 10 % headroom. The 220.0 gr projectile in 0.323" calls for a 1:6.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, ADI AR 2209, Alliant Reloder-19 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 Reloder-17, ReloadSwiss RS 60, ReloadSwiss RS 70 rank at the top here: for 8 x 57 IS with the .323 | 220gr | A-Square MONO RN they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, ADI AR 2209, Alliant Reloder-19, Alliant Reloder-22 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.