Load Specifications
Load data in caliber 8 x 57 IS with .323 | 250gr | Woodleigh RN SN bullet and 93 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 60, ReloadSwiss RS 70 and Hodgdon Superformance.
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>> | 82% | 50,473 psi | 89% | 2146 fps | 100% |
| Accurate 2495 | <<locked>> | 86% | 48,414 psi | 86% | 2165 fps | 100% |
| Accurate 2520 | <<locked>> | 82% | 50,024 psi | 88% | 2218 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 47,877 psi | 85% | 2162 fps | 96.6% |
| Accurate 3100ᴾ | <<locked>> | 100% | 38,551 psi | 68% | 2129 fps | 96.4% |
| Accurate 4064 | <<locked>> | 88% | 48,559 psi | 86% | 2208 fps | 100% |
| Accurate 4350 | <<locked>> | 98% | 50,705 psi | 90% | 2316 fps | 99.7% |
| ADI AR 2206H | <<locked>> | 84% | 49,443 psi | 87% | 2231 fps | 100% |
| ADI AR 2208 | <<locked>> | 90% | 50,111 psi | 89% | 2231 fps | 99.8% |
| ADI Benchmark 8208 | <<locked>> | 82% | 48,646 psi | 86% | 2192 fps | 100% |
| Alliant AR-Comp | <<locked>> | 82% | 48,820 psi | 86% | 2169 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 86% | 48,283 psi | 85% | 2323 fps | 99.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 90% | 49,864 psi | 88% | 2251 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 88% | 50,618 psi | 89% | 2267 fps | 99.9% |
| Alliant Reloder-16 | <<locked>> | 98% | 49,284 psi | 87% | 2320 fps | 99.8% |
| Alliant Reloder-17 | <<locked>> | 94% | 49,951 psi | 88% | 2349 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 37,347 psi | 66% | 2156 fps | 99.2% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 41,104 psi | 73% | 2280 fps | 98.4% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 48,718 psi | 86% | 2244 fps | 99.6% |
| Bofors RP3 | <<locked>> | 90% | 49,937 psi | 88% | 2260 fps | 100% |
| Bofors RP7 | <<locked>> | 94% | 50,633 psi | 90% | 2238 fps | 97.4% |
| Hodgdon Benchmark | <<locked>> | 82% | 50,285 psi | 89% | 2175 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 84% | 50,488 psi | 89% | 2254 fps | 100% |
| Hodgdon H380 | <<locked>> | 90% | 51,039 psi | 90% | 2270 fps | 99.5% |
| Hodgdon H414 | <<locked>> | 96% | 50,227 psi | 89% | 2313 fps | 98.1% |
| Hodgdon H4350 | <<locked>> | 92% | 48,443 psi | 86% | 2241 fps | 96.3% |
| Hodgdon H4895 | <<locked>> | 84% | 49,879 psi | 88% | 2241 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 48,457 psi | 86% | 2257 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 86% | 48,631 psi | 86% | 2267 fps | 100% |
| Hodgdon Superformance | <<locked>> | 96% | 50,691 psi | 90% | 2343 fps | 97.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,549 psi | 63% | 1355 fps | 100% |
| Hodgdon VARGET | <<locked>> | 86% | 50,836 psi | 90% | 2238 fps | 100% |
| IMR 3031 | <<locked>> | 84% | 49,414 psi | 87% | 2221 fps | 100% |
| IMR 4064 | <<locked>> | 88% | 49,922 psi | 88% | 2218 fps | 99.9% |
| IMR 4166 Enduron | <<locked>> | 86% | 49,908 psi | 88% | 2201 fps | 97.8% |
| IMR 4350 | <<locked>> | 98% | 50,531 psi | 89% | 2260 fps | 97.4% |
| IMR 4451 Enduron | <<locked>> | 92% | 49,429 psi | 87% | 2221 fps | 97.6% |
| IMR 4831ᴾ | <<locked>> | 100% | 51,140 psi | 90% | 2306 fps | 99.8% |
| IMR 4895 | <<locked>> | 86% | 48,762 psi | 86% | 2251 fps | 100% |
| IMR 8208 XBR | <<locked>> | 82% | 48,646 psi | 86% | 2192 fps | 100% |
| Lovex D073.6 | <<locked>> | 84% | 48,414 psi | 86% | 2208 fps | 100% |
| Lovex S060 | <<locked>> | 84% | 49,240 psi | 87% | 2172 fps | 99.9% |
| Lovex S062 | <<locked>> | 88% | 49,676 psi | 88% | 2215 fps | 100% |
| Lovex S065 | <<locked>> | 94% | 48,530 psi | 86% | 2215 fps | 98.7% |
| Lovex S070 | <<locked>> | 96% | 49,081 psi | 87% | 2244 fps | 97.9% |
| Norma 201 | <<locked>> | 84% | 48,182 psi | 85% | 2185 fps | 100% |
| Norma 202 | <<locked>> | 84% | 48,747 psi | 86% | 2188 fps | 100% |
| Norma 203B | <<locked>> | 88% | 49,864 psi | 88% | 2257 fps | 100% |
| Norma 204 | <<locked>> | 98% | 50,908 psi | 90% | 2300 fps | 96.2% |
| Norma URP | <<locked>> | 98% | 49,951 psi | 88% | 2306 fps | 99.6% |
| Ramshot Big Game | <<locked>> | 88% | 49,632 psi | 88% | 2277 fps | 99.9% |
| Ramshot Hunter | <<locked>> | 98% | 48,994 psi | 87% | 2306 fps | 98.5% |
| Ramshot TAC | <<locked>> | 82% | 48,501 psi | 86% | 2205 fps | 98.8% |
| Ramshot Wild Boar | <<locked>> | 84% | 50,995 psi | 90% | 2260 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,955 psi | 64% | 1388 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 48,269 psi | 85% | 2215 fps | 98.1% |
| ReloadSwiss RS 52 | <<locked>> | 86% | 50,633 psi | 90% | 2320 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 92% | 49,690 psi | 88% | 2346 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 98% | 50,009 psi | 88% | 2333 fps | 99.6% |
| ReloadSwiss RS 70 | <<locked>> | 98% | 50,285 psi | 89% | 2359 fps | 99.4% |
| Rottweil R 901 | <<locked>> | 82% | 49,559 psi | 88% | 2172 fps | 100% |
| Rottweil R 902 | <<locked>> | 86% | 48,762 psi | 86% | 2185 fps | 100% |
| Rottweil R 903 | <<locked>> | 92% | 50,125 psi | 89% | 2257 fps | 100% |
| Rottweil R 907 | <<locked>> | 94% | 50,633 psi | 90% | 2238 fps | 97.4% |
| Shooters World Long Rifle | <<locked>> | 94% | 48,530 psi | 86% | 2215 fps | 98.7% |
| Shooters World Match Rifle | <<locked>> | 84% | 48,414 psi | 86% | 2208 fps | 100% |
| Shooters World Precision | <<locked>> | 88% | 49,676 psi | 88% | 2215 fps | 100% |
| Shooters World SW4350 | <<locked>> | 96% | 49,081 psi | 87% | 2244 fps | 97.9% |
| SNPE Vectan SP 11 | <<locked>> | 90% | 48,211 psi | 85% | 2264 fps | 99.9% |
| SNPE Vectan SP 7 | <<locked>> | 84% | 49,864 psi | 88% | 2228 fps | 99.3% |
| SNPE Vectan SP 9 | <<locked>> | 86% | 50,879 psi | 90% | 2251 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 49,966 psi | 88% | 2139 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 90% | 49,734 psi | 88% | 2139 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 48,718 psi | 86% | 2178 fps | 97.5% |
| Somchem S335 | <<locked>> | 84% | 49,139 psi | 87% | 2136 fps | 100% |
| Somchem S341 | <<locked>> | 84% | 49,647 psi | 88% | 2224 fps | 99.9% |
| Somchem S355 | <<locked>> | 92% | 50,749 psi | 90% | 2254 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 47,761 psi | 84% | 2310 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 44,512 psi | 79% | 2211 fps | 96.2% |
| Vihtavuori N133 | <<locked>> | 84% | 50,241 psi | 89% | 2126 fps | 100% |
| Vihtavuori N135 | <<locked>> | 86% | 48,283 psi | 85% | 2159 fps | 100% |
| Vihtavuori N140 | <<locked>> | 86% | 49,095 psi | 87% | 2172 fps | 100% |
| Vihtavuori N150 | <<locked>> | 92% | 48,733 psi | 86% | 2198 fps | 100% |
| Vihtavuori N160 | <<locked>> | 96% | 49,356 psi | 87% | 2260 fps | 99.5% |
| Vihtavuori N530 | <<locked>> | 82% | 48,689 psi | 86% | 2188 fps | 100% |
| Vihtavuori N540 | <<locked>> | 88% | 50,241 psi | 89% | 2208 fps | 100% |
| Vihtavuori N550 | <<locked>> | 96% | 48,283 psi | 85% | 2267 fps | 99.3% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 40,408 psi | 71% | 2215 fps | 99.1% |
| Winchester 6.5 StaBALL | <<locked>> | 96% | 49,356 psi | 87% | 2244 fps | 100% |
| Winchester 748 | <<locked>> | 82% | 48,341 psi | 85% | 2228 fps | 100% |
| Winchester 760 | <<locked>> | 96% | 50,517 psi | 89% | 2320 fps | 98.1% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 33,228 psi | 59% | 2159 fps | 99.1% |
| Winchester StaBALL Match | <<locked>> | 86% | 50,401 psi | 89% | 2254 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% | 47,369 psi | 84% | 2110 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 40,059 psi | 71% | 2057 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 46,659 psi | 82% | 2175 fps | 100% |
| Accurate 2700 | <<locked>> | 82% | 42,061 psi | 74% | 2077 fps | 95.1% |
| Accurate 3100 | <<locked>> | 98% | 36,013 psi | 64% | 2087 fps | 95.6% |
| Accurate 4064 | <<locked>> | 80% | 37,884 psi | 67% | 2057 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 29,486 psi | 52% | 1962 fps | 95.2% |
| ADI AR 2206H | <<locked>> | 80% | 43,685 psi | 77% | 2149 fps | 99.6% |
| ADI AR 2208 | <<locked>> | 80% | 37,144 psi | 66% | 2028 fps | 98.1% |
| ADI Benchmark 8208 | <<locked>> | 80% | 45,745 psi | 81% | 2152 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 45,643 psi | 81% | 2129 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 39,494 psi | 70% | 2178 fps | 98.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 36,593 psi | 65% | 2047 fps | 99.2% |
| Alliant Reloder-15 | <<locked>> | 80% | 39,436 psi | 70% | 2100 fps | 98.8% |
| Alliant Reloder-16 | <<locked>> | 82% | 30,385 psi | 54% | 1972 fps | 95.4% |
| Alliant Reloder-17 | <<locked>> | 80% | 31,459 psi | 56% | 2028 fps | 97.7% |
| Alliant Reloder-23 | <<locked>> | 90% | 27,702 psi | 49% | 1942 fps | 95.8% |
| Alliant Reloder-26 | <<locked>> | 94% | 33,591 psi | 59% | 2129 fps | 95.9% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 42,525 psi | 75% | 2152 fps | 98.9% |
| Bofors RP3 | <<locked>> | 80% | 36,158 psi | 64% | 2051 fps | 99.2% |
| Bofors RP7 | <<locked>> | 88% | 42,032 psi | 74% | 2110 fps | 95.4% |
| Hodgdon Benchmark | <<locked>> | 80% | 47,297 psi | 84% | 2136 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 44,295 psi | 78% | 2172 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 36,927 psi | 65% | 2054 fps | 97.1% |
| Hodgdon H414 | <<locked>> | 88% | 38,798 psi | 69% | 2133 fps | 95.3% |
| Hodgdon H4350 | <<locked>> | 90% | 45,223 psi | 80% | 2195 fps | 95.5% |
| Hodgdon H4895 | <<locked>> | 80% | 44,048 psi | 78% | 2156 fps | 99.8% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 26,034 psi | 46% | 1850 fps | 95.3% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 39,682 psi | 70% | 2133 fps | 99.7% |
| Hodgdon Superformance | 50 gr | 90% | 41,191 psi | 73% | 2195 fps | 95.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,440 psi | 47% | 1207 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 42,119 psi | 74% | 2116 fps | 99.7% |
| IMR 3031 | <<locked>> | 80% | 43,569 psi | 77% | 2146 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 39,001 psi | 69% | 2054 fps | 98.7% |
| IMR 4166 Enduron | <<locked>> | 80% | 41,307 psi | 73% | 2070 fps | 95.9% |
| IMR 4350 | <<locked>> | 92% | 42,018 psi | 74% | 2133 fps | 95.5% |
| IMR 4451 Enduron | <<locked>> | 84% | 38,972 psi | 69% | 2057 fps | 95.1% |
| IMR 4831 | <<locked>> | 84% | 30,719 psi | 54% | 1975 fps | 95.8% |
| IMR 4895 | <<locked>> | 80% | 40,364 psi | 71% | 2123 fps | 99.3% |
| IMR 8208 XBR | <<locked>> | 80% | 45,745 psi | 81% | 2152 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 42,583 psi | 75% | 2129 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 43,816 psi | 77% | 2093 fps | 99.6% |
| Lovex S062 | <<locked>> | 80% | 38,914 psi | 69% | 2060 fps | 99.7% |
| Lovex S065 | <<locked>> | 82% | 33,982 psi | 60% | 1975 fps | 95.2% |
| Lovex S070 | <<locked>> | 88% | 38,551 psi | 68% | 2080 fps | 95.4% |
| Norma 201 | <<locked>> | 80% | 42,757 psi | 76% | 2106 fps | 99.9% |
| Norma 202 | <<locked>> | 80% | 42,975 psi | 76% | 2113 fps | 100% |
| Norma 203B | <<locked>> | 80% | 38,783 psi | 69% | 2090 fps | 99% |
| Norma 204 | <<locked>> | 96% | 47,442 psi | 84% | 2251 fps | 95.4% |
| Norma URP | <<locked>> | 82% | 30,124 psi | 53% | 1965 fps | 95.2% |
| Ramshot Big Game | <<locked>> | 80% | 38,116 psi | 67% | 2100 fps | 98.8% |
| Ramshot Hunter | <<locked>> | 88% | 35,621 psi | 63% | 2083 fps | 95.1% |
| Ramshot TAC | <<locked>> | 80% | 45,382 psi | 80% | 2159 fps | 98.3% |
| Ramshot Wild Boar | <<locked>> | 80% | 44,817 psi | 79% | 2175 fps | 99.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,876 psi | 48% | 1240 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 37,550 psi | 66% | 2041 fps | 95.5% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 41,220 psi | 73% | 2182 fps | 99.1% |
| ReloadSwiss RS 60 | 42 gr | 80% | 33,475 psi | 59% | 2080 fps | 99.8% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 31,386 psi | 55% | 2021 fps | 95.5% |
| ReloadSwiss RS 70 | 45.9 gr | 86% | 33,866 psi | 60% | 2070 fps | 95.3% |
| Rottweil R 901 | <<locked>> | 80% | 46,572 psi | 82% | 2133 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 40,654 psi | 72% | 2067 fps | 99.8% |
| Rottweil R 903 | <<locked>> | 80% | 34,011 psi | 60% | 2008 fps | 98.6% |
| Rottweil R 907 | <<locked>> | 88% | 42,032 psi | 74% | 2110 fps | 95.4% |
| Shooters World Long Rifle | <<locked>> | 82% | 33,982 psi | 60% | 1975 fps | 95.2% |
| Shooters World Match Rifle | <<locked>> | 80% | 42,583 psi | 75% | 2129 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 38,914 psi | 69% | 2060 fps | 99.7% |
| Shooters World SW4350 | <<locked>> | 88% | 38,551 psi | 68% | 2080 fps | 95.4% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 34,983 psi | 62% | 2051 fps | 98.2% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 43,743 psi | 77% | 2139 fps | 98.5% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 42,105 psi | 74% | 2126 fps | 99.4% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 44,222 psi | 78% | 2064 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 36,709 psi | 65% | 1962 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 40,132 psi | 71% | 2054 fps | 95.6% |
| Somchem S335 | <<locked>> | 80% | 43,743 psi | 77% | 2067 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 43,323 psi | 77% | 2136 fps | 99.5% |
| Somchem S355 | <<locked>> | 80% | 34,983 psi | 62% | 2011 fps | 98.6% |
| Somchem S365 | <<locked>> | 80% | 25,280 psi | 45% | 1880 fps | 96.6% |
| Somchem S385 | <<locked>> | 98% | 41,742 psi | 74% | 2169 fps | 95.4% |
| Vihtavuori N133 | <<locked>> | 80% | 44,527 psi | 79% | 2057 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 40,190 psi | 71% | 2051 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 40,640 psi | 72% | 2060 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 33,141 psi | 59% | 1959 fps | 99.2% |
| Vihtavuori N160 | <<locked>> | 82% | 31,546 psi | 56% | 1965 fps | 95.7% |
| Vihtavuori N530 | <<locked>> | 80% | 45,658 psi | 81% | 2146 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 39,015 psi | 69% | 2054 fps | 100% |
| Vihtavuori N550 | <<locked>> | 82% | 30,734 psi | 54% | 1965 fps | 95.2% |
| Vihtavuori N555 | <<locked>> | 88% | 27,659 psi | 49% | 1959 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 29,399 psi | 52% | 1906 fps | 97% |
| Winchester 748 | <<locked>> | 80% | 45,049 psi | 80% | 2185 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 39,015 psi | 69% | 2139 fps | 95.4% |
| Winchester StaBALL HD | <<locked>> | 92% | 26,005 psi | 46% | 1955 fps | 95% |
| Winchester StaBALL Match | <<locked>> | 80% | 41,292 psi | 73% | 2126 fps | 99.6% |
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 112 powders for 8 x 57 IS loaded with the .323 | 250gr | Woodleigh RN SN. ReloadSwiss RS 70 delivers the highest muzzle velocity at 2,359 fps; across all powders the maximum-charge window runs from 1,355 fps to 2,359 fps. Accurate 3100 gives the best case fill at 100 %, and 112 of the 112 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 250.0 gr projectile in 0.323" calls for a 1:14.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, ADI AR 2209, ADI AR 2213 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, ReloadSwiss RS 70, Hodgdon Superformance rank at the top here: for 8 x 57 IS with the .323 | 250gr | Woodleigh RN SN they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, ADI AR 2213, Alliant Reloder-22, Alliant Reloder-25 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.