Load Specifications
Load data in caliber 8 x 57 IRS with .323 | 220gr | Brenneke TOG bullet and 64 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 60, Alliant Reloder-17 and ReloadSwiss RS 62.
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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Max Load - Barrel Length: 23.62"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2495 | <<locked>> | 86% | 43,308 psi | 90% | 2260 fps | 100% |
| Accurate 4064 | <<locked>> | 86% | 40,756 psi | 85% | 2254 fps | 100% |
| Accurate 4350 | <<locked>> | 96% | 41,234 psi | 86% | 2329 fps | 97.4% |
| ADI AR 2206H | <<locked>> | 82% | 42,105 psi | 88% | 2267 fps | 98.6% |
| ADI AR 2208 | <<locked>> | 88% | 43,004 psi | 90% | 2270 fps | 98.1% |
| Alliant Power Pro 2000-MR | <<locked>> | 86% | 43,308 psi | 90% | 2388 fps | 98.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 42,235 psi | 88% | 2290 fps | 99.2% |
| Alliant Reloder-15 | <<locked>> | 86% | 42,786 psi | 89% | 2303 fps | 98.3% |
| Alliant Reloder-16 | <<locked>> | 96% | 41,858 psi | 87% | 2343 fps | 97.6% |
| Alliant Reloder-17 | <<locked>> | 92% | 41,800 psi | 87% | 2372 fps | 99% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 33,417 psi | 70% | 2201 fps | 96.4% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 40,901 psi | 85% | 2270 fps | 97.3% |
| Bofors RP3 | <<locked>> | 88% | 41,872 psi | 87% | 2297 fps | 99.3% |
| Hodgdon BL-C2 | <<locked>> | 82% | 42,467 psi | 89% | 2297 fps | 99.7% |
| Hodgdon H380 | <<locked>> | 88% | 43,178 psi | 90% | 2303 fps | 97.2% |
| Hodgdon H4895 | <<locked>> | 82% | 42,409 psi | 89% | 2277 fps | 99% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 43,207 psi | 90% | 2329 fps | 99.1% |
| Hodgdon LEVERevolution | <<locked>> | 86% | 43,308 psi | 90% | 2343 fps | 99.4% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,998 psi | 73% | 1444 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 40,915 psi | 85% | 2241 fps | 98.7% |
| IMR 3031 | <<locked>> | 82% | 41,568 psi | 87% | 2277 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 42,395 psi | 89% | 2254 fps | 98.2% |
| IMR 4831 | <<locked>> | 98% | 42,424 psi | 89% | 2333 fps | 97.7% |
| IMR 4895 | <<locked>> | 84% | 41,133 psi | 86% | 2283 fps | 98.5% |
| Lovex D073.6 | <<locked>> | 82% | 40,741 psi | 85% | 2254 fps | 99.9% |
| Lovex S060 | <<locked>> | 82% | 42,699 psi | 89% | 2218 fps | 98.6% |
| Lovex S062 | <<locked>> | 86% | 42,090 psi | 88% | 2257 fps | 99.4% |
| Lovex S065 | <<locked>> | 92% | 41,336 psi | 86% | 2244 fps | 95.8% |
| Norma 201 | <<locked>> | 82% | 41,263 psi | 86% | 2231 fps | 99.3% |
| Norma 202 | <<locked>> | 82% | 41,336 psi | 86% | 2238 fps | 100% |
| Norma 203B | <<locked>> | 86% | 42,076 psi | 88% | 2290 fps | 98.6% |
| Norma URP | <<locked>> | 96% | 41,669 psi | 87% | 2329 fps | 97.3% |
| Ramshot Big Game | <<locked>> | 86% | 41,524 psi | 87% | 2303 fps | 98.3% |
| Ramshot Wild Boar | <<locked>> | 82% | 43,192 psi | 90% | 2297 fps | 98.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,302 psi | 74% | 1476 fps | 100% |
| ReloadSwiss RS 52 | <<locked>> | 84% | 41,872 psi | 87% | 2346 fps | 98.2% |
| ReloadSwiss RS 60 | <<locked>> | 90% | 41,684 psi | 87% | 2375 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 96% | 41,350 psi | 86% | 2352 fps | 97% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 42,192 psi | 88% | 2362 fps | 96.3% |
| Rottweil R 902 | <<locked>> | 84% | 41,756 psi | 87% | 2231 fps | 99.3% |
| Rottweil R 903 | <<locked>> | 90% | 41,727 psi | 87% | 2287 fps | 99% |
| Shooters World Long Rifle | <<locked>> | 92% | 41,336 psi | 86% | 2244 fps | 95.8% |
| Shooters World Match Rifle | <<locked>> | 82% | 40,741 psi | 85% | 2254 fps | 99.9% |
| Shooters World Precision | <<locked>> | 86% | 42,090 psi | 88% | 2257 fps | 99.4% |
| SNPE Vectan SP 11 | <<locked>> | 90% | 43,207 psi | 90% | 2339 fps | 98.7% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 42,076 psi | 88% | 2254 fps | 96.8% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 43,236 psi | 90% | 2290 fps | 98.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 43,091 psi | 90% | 2195 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 42,525 psi | 89% | 2195 fps | 100% |
| Somchem S335 | <<locked>> | 82% | 42,395 psi | 89% | 2195 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 41,684 psi | 87% | 2254 fps | 98.4% |
| Somchem S355 | <<locked>> | 90% | 42,714 psi | 89% | 2290 fps | 99% |
| Somchem S365ᴾ | <<locked>> | 100% | 42,264 psi | 88% | 2379 fps | 99.8% |
| Vihtavuori N133 | <<locked>> | 82% | 43,250 psi | 90% | 2188 fps | 100% |
| Vihtavuori N135 | <<locked>> | 84% | 40,785 psi | 85% | 2215 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 41,553 psi | 87% | 2221 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 40,843 psi | 85% | 2238 fps | 99.5% |
| Vihtavuori N160 | <<locked>> | 94% | 41,075 psi | 86% | 2283 fps | 97% |
| Vihtavuori N540 | <<locked>> | 86% | 42,844 psi | 90% | 2260 fps | 100% |
| Vihtavuori N550 | <<locked>> | 96% | 43,018 psi | 90% | 2336 fps | 97.4% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 35,346 psi | 74% | 2267 fps | 96.4% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 41,669 psi | 87% | 2274 fps | 98.9% |
| Winchester 748 | <<locked>> | 82% | 43,236 psi | 90% | 2313 fps | 99.9% |
| Winchester StaBALL Match | <<locked>> | 84% | 42,438 psi | 89% | 2290 fps | 99% |
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 2495 | <<locked>> | 80% | 35,563 psi | 74% | 2139 fps | 100% |
| Accurate 4064 | <<locked>> | 80% | 33,634 psi | 70% | 2126 fps | 99.7% |
| Accurate 4350 | <<locked>> | 90% | 33,620 psi | 70% | 2188 fps | 95.1% |
| ADI AR 2206H | <<locked>> | 80% | 39,552 psi | 83% | 2224 fps | 98% |
| ADI AR 2208 | <<locked>> | 80% | 33,692 psi | 70% | 2096 fps | 95.6% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 35,505 psi | 74% | 2231 fps | 95.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 32,779 psi | 68% | 2113 fps | 97.2% |
| Alliant Reloder-15 | <<locked>> | 80% | 35,462 psi | 74% | 2165 fps | 96.5% |
| Alliant Reloder-16 | <<locked>> | 90% | 34,867 psi | 73% | 2198 fps | 95.2% |
| Alliant Reloder-17 | 43.3 gr | 82% | 30,226 psi | 63% | 2119 fps | 95.2% |
| Alliant Reloder-23 | <<locked>> | 98% | 31,444 psi | 66% | 2156 fps | 95.5% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 38,450 psi | 80% | 2224 fps | 96.7% |
| Bofors RP3 | <<locked>> | 80% | 32,068 psi | 67% | 2110 fps | 97.1% |
| Hodgdon BL-C2 | <<locked>> | 80% | 39,653 psi | 83% | 2247 fps | 99.4% |
| Hodgdon H380 | <<locked>> | 84% | 37,811 psi | 79% | 2205 fps | 95.7% |
| Hodgdon H4895 | <<locked>> | 80% | 39,842 psi | 83% | 2234 fps | 98.6% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 29,979 psi | 63% | 2070 fps | 95.3% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 35,694 psi | 75% | 2205 fps | 98.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,020 psi | 54% | 1286 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 38,421 psi | 80% | 2195 fps | 98.2% |
| IMR 3031 | <<locked>> | 80% | 38,870 psi | 81% | 2231 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 35,317 psi | 74% | 2123 fps | 96.5% |
| IMR 4831 | <<locked>> | 92% | 34,998 psi | 73% | 2195 fps | 95.6% |
| IMR 4895 | <<locked>> | 80% | 36,245 psi | 76% | 2192 fps | 97.3% |
| Lovex D073.6 | <<locked>> | 80% | 37,942 psi | 79% | 2205 fps | 99.7% |
| Lovex S060 | <<locked>> | 80% | 40,161 psi | 84% | 2172 fps | 98.2% |
| Lovex S062 | <<locked>> | 80% | 35,056 psi | 73% | 2129 fps | 98.2% |
| Lovex S065 | <<locked>> | 90% | 38,870 psi | 81% | 2201 fps | 95% |
| Norma 201 | <<locked>> | 80% | 38,769 psi | 81% | 2185 fps | 98.9% |
| Norma 202 | <<locked>> | 80% | 38,754 psi | 81% | 2195 fps | 99.9% |
| Norma 203B | <<locked>> | 80% | 34,824 psi | 73% | 2156 fps | 96.9% |
| Norma URP | <<locked>> | 90% | 34,519 psi | 72% | 2192 fps | 95.1% |
| Ramshot Big Game | <<locked>> | 80% | 34,113 psi | 71% | 2162 fps | 96.3% |
| Ramshot Wild Boar | <<locked>> | 80% | 40,379 psi | 84% | 2247 fps | 98.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,121 psi | 55% | 1316 fps | 100% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 36,492 psi | 76% | 2244 fps | 96.8% |
| ReloadSwiss RS 60 | 42.3 gr | 80% | 30,298 psi | 63% | 2133 fps | 97.9% |
| ReloadSwiss RS 62 | 48.5 gr | 92% | 35,998 psi | 75% | 2251 fps | 95.3% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 39,450 psi | 82% | 2310 fps | 95.3% |
| Rottweil R 902 | <<locked>> | 80% | 36,825 psi | 77% | 2142 fps | 98.5% |
| Rottweil R 903 | <<locked>> | 80% | 30,371 psi | 63% | 2067 fps | 96.1% |
| Shooters World Long Rifle | <<locked>> | 90% | 38,870 psi | 81% | 2201 fps | 95% |
| Shooters World Match Rifle | <<locked>> | 80% | 37,942 psi | 79% | 2205 fps | 99.7% |
| Shooters World Precision | <<locked>> | 80% | 35,056 psi | 73% | 2129 fps | 98.2% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 31,372 psi | 66% | 2106 fps | 95.3% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 39,320 psi | 82% | 2208 fps | 96% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 38,029 psi | 79% | 2195 fps | 97.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 40,422 psi | 84% | 2152 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 33,257 psi | 69% | 2037 fps | 99.8% |
| Somchem S335 | <<locked>> | 80% | 39,856 psi | 83% | 2156 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 39,160 psi | 82% | 2211 fps | 97.8% |
| Somchem S355 | <<locked>> | 80% | 31,357 psi | 66% | 2073 fps | 96.2% |
| Somchem S365 | <<locked>> | 86% | 27,311 psi | 57% | 2057 fps | 95.7% |
| Vihtavuori N133 | <<locked>> | 80% | 40,553 psi | 85% | 2149 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 35,955 psi | 75% | 2136 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 36,825 psi | 77% | 2142 fps | 99.9% |
| Vihtavuori N150 | <<locked>> | 80% | 29,776 psi | 62% | 2024 fps | 97.1% |
| Vihtavuori N160 | <<locked>> | 90% | 36,245 psi | 76% | 2195 fps | 95.6% |
| Vihtavuori N540 | <<locked>> | 80% | 35,360 psi | 74% | 2133 fps | 99.6% |
| Vihtavuori N550 | <<locked>> | 90% | 35,433 psi | 74% | 2198 fps | 95.2% |
| Vihtavuori N555 | <<locked>> | 98% | 33,170 psi | 69% | 2218 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 30,255 psi | 63% | 2044 fps | 95.4% |
| Winchester 748 | <<locked>> | 80% | 40,538 psi | 85% | 2267 fps | 99.7% |
| Winchester StaBALL Match | <<locked>> | 80% | 37,202 psi | 78% | 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 64 powders for 8 x 57 IRS loaded with the .323 | 220gr | Brenneke TOG. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,388 fps; across all powders the maximum-charge window runs from 1,444 fps to 2,388 fps. Alliant Reloder-23 gives the best case fill at 100 %, and 64 of the 64 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (330 MPa), the top charges use 70–90 %, 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. Alliant Reloder-23, Hodgdon Hybrid 100V, Hodgdon TrailBoss 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, Alliant Reloder-17, ReloadSwiss RS 62 rank at the top here: for 8 x 57 IRS 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.