Load Specifications
Load data in caliber 8 x 57 IRS with .323 | 220gr | Woodleigh PP SN bullet and 58 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>> | 84% | 41,539 psi | 87% | 2241 fps | 100% |
| Accurate 4064 | <<locked>> | 86% | 41,669 psi | 87% | 2277 fps | 100% |
| Accurate 4350 | <<locked>> | 96% | 42,540 psi | 89% | 2359 fps | 97.8% |
| ADI AR 2206H | <<locked>> | 82% | 42,902 psi | 90% | 2290 fps | 98.8% |
| ADI AR 2208 | <<locked>> | 86% | 41,365 psi | 86% | 2251 fps | 97.9% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 41,582 psi | 87% | 2365 fps | 97.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 43,308 psi | 90% | 2313 fps | 99.4% |
| Alliant Reloder-15 | <<locked>> | 84% | 40,988 psi | 86% | 2277 fps | 98.1% |
| Alliant Reloder-16 | <<locked>> | 96% | 42,656 psi | 89% | 2365 fps | 98% |
| Alliant Reloder-17 | <<locked>> | 92% | 42,844 psi | 90% | 2398 fps | 99.3% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 34,185 psi | 71% | 2228 fps | 97% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 41,814 psi | 87% | 2293 fps | 97.7% |
| Bofors RP3 | <<locked>> | 88% | 42,946 psi | 90% | 2320 fps | 99.5% |
| Hodgdon H380 | <<locked>> | 86% | 41,249 psi | 86% | 2277 fps | 96.9% |
| Hodgdon H4895 | <<locked>> | 82% | 43,279 psi | 90% | 2300 fps | 99.2% |
| Hodgdon Hybrid 100V | <<locked>> | 98% | 41,640 psi | 87% | 2313 fps | 99% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 41,713 psi | 87% | 2326 fps | 99.3% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,896 psi | 73% | 1450 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 41,698 psi | 87% | 2260 fps | 98.9% |
| IMR 3031 | <<locked>> | 82% | 42,583 psi | 89% | 2297 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 40,872 psi | 85% | 2234 fps | 98.1% |
| IMR 4831 | <<locked>> | 96% | 40,973 psi | 86% | 2316 fps | 97.5% |
| IMR 4895 | <<locked>> | 84% | 41,959 psi | 88% | 2306 fps | 98.7% |
| Lovex D073.6 | <<locked>> | 82% | 41,626 psi | 87% | 2274 fps | 100% |
| Lovex S062 | <<locked>> | 86% | 43,178 psi | 90% | 2283 fps | 99.6% |
| Lovex S065 | <<locked>> | 92% | 42,221 psi | 88% | 2270 fps | 96.2% |
| Norma 201 | <<locked>> | 82% | 42,119 psi | 88% | 2251 fps | 99.5% |
| Norma 202 | <<locked>> | 82% | 42,206 psi | 88% | 2257 fps | 100% |
| Norma 203B | <<locked>> | 86% | 43,120 psi | 90% | 2316 fps | 98.9% |
| Norma URP | <<locked>> | 96% | 42,830 psi | 89% | 2359 fps | 97.7% |
| Ramshot Big Game | <<locked>> | 86% | 42,714 psi | 89% | 2333 fps | 98.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,462 psi | 74% | 1486 fps | 100% |
| ReloadSwiss RS 52 | <<locked>> | 84% | 43,033 psi | 90% | 2372 fps | 98.5% |
| ReloadSwiss RS 60 | <<locked>> | 90% | 42,728 psi | 89% | 2405 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 96% | 42,395 psi | 89% | 2379 fps | 97.4% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 43,018 psi | 90% | 2388 fps | 96.8% |
| Rottweil R 902 | <<locked>> | 84% | 42,583 psi | 89% | 2251 fps | 99.5% |
| Rottweil R 903 | <<locked>> | 90% | 42,801 psi | 89% | 2313 fps | 99.3% |
| Shooters World Long Rifle | <<locked>> | 92% | 42,221 psi | 88% | 2270 fps | 96.2% |
| Shooters World Match Rifle | <<locked>> | 82% | 41,626 psi | 87% | 2274 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 43,178 psi | 90% | 2283 fps | 99.6% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 41,539 psi | 87% | 2320 fps | 98.5% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 43,076 psi | 90% | 2280 fps | 97.2% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 41,423 psi | 87% | 2267 fps | 98.5% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 40,959 psi | 86% | 2178 fps | 100% |
| Somchem S335 | <<locked>> | 82% | 43,207 psi | 90% | 2215 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 42,685 psi | 89% | 2280 fps | 98.7% |
| Somchem S355 | <<locked>> | 88% | 41,147 psi | 86% | 2274 fps | 98.9% |
| Somchem S365ᴾ | <<locked>> | 100% | 43,308 psi | 90% | 2405 fps | 99.9% |
| Vihtavuori N135 | <<locked>> | 84% | 41,771 psi | 87% | 2238 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 42,656 psi | 89% | 2247 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 41,829 psi | 87% | 2260 fps | 99.7% |
| Vihtavuori N160 | <<locked>> | 94% | 42,250 psi | 88% | 2313 fps | 97.5% |
| Vihtavuori N540 | <<locked>> | 84% | 41,002 psi | 86% | 2241 fps | 100% |
| Vihtavuori N550 | <<locked>> | 94% | 41,249 psi | 86% | 2313 fps | 97.1% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 36,376 psi | 76% | 2293 fps | 96.9% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 42,757 psi | 89% | 2300 fps | 99.2% |
| Winchester StaBALL Match | <<locked>> | 82% | 40,640 psi | 85% | 2267 fps | 98.9% |
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% | 36,492 psi | 76% | 2159 fps | 100% |
| Accurate 4064 | <<locked>> | 80% | 34,505 psi | 72% | 2152 fps | 99.8% |
| Accurate 4350 | <<locked>> | 90% | 34,635 psi | 72% | 2215 fps | 95.6% |
| ADI AR 2206H | <<locked>> | 80% | 40,393 psi | 84% | 2247 fps | 98.3% |
| ADI AR 2208 | <<locked>> | 80% | 34,432 psi | 72% | 2119 fps | 96% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 36,405 psi | 76% | 2260 fps | 96.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 33,605 psi | 70% | 2136 fps | 97.6% |
| Alliant Reloder-15 | <<locked>> | 80% | 36,260 psi | 76% | 2188 fps | 96.9% |
| Alliant Reloder-16 | <<locked>> | 90% | 35,636 psi | 74% | 2224 fps | 95.8% |
| Alliant Reloder-17 | 44.3 gr | 82% | 30,937 psi | 65% | 2146 fps | 95.8% |
| Alliant Reloder-23 | <<locked>> | 96% | 30,240 psi | 63% | 2133 fps | 95.1% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 39,160 psi | 82% | 2244 fps | 97% |
| Bofors RP3 | <<locked>> | 80% | 32,880 psi | 69% | 2136 fps | 97.5% |
| Hodgdon H380 | <<locked>> | 82% | 36,216 psi | 76% | 2182 fps | 95.4% |
| Hodgdon H4895 | <<locked>> | 80% | 40,683 psi | 85% | 2257 fps | 98.8% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 30,560 psi | 64% | 2090 fps | 95.8% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 36,448 psi | 76% | 2228 fps | 98.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,107 psi | 55% | 1296 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 39,233 psi | 82% | 2218 fps | 98.5% |
| IMR 3031 | <<locked>> | 80% | 39,856 psi | 83% | 2254 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 36,114 psi | 75% | 2146 fps | 96.8% |
| IMR 4831 | <<locked>> | 90% | 33,736 psi | 70% | 2178 fps | 95.3% |
| IMR 4895 | <<locked>> | 80% | 37,057 psi | 77% | 2215 fps | 97.7% |
| Lovex D073.6 | <<locked>> | 80% | 38,798 psi | 81% | 2228 fps | 99.8% |
| Lovex S062 | <<locked>> | 80% | 35,897 psi | 75% | 2152 fps | 98.5% |
| Lovex S065 | <<locked>> | 90% | 39,798 psi | 83% | 2228 fps | 95.5% |
| Norma 201 | <<locked>> | 80% | 39,610 psi | 83% | 2208 fps | 99.1% |
| Norma 202 | <<locked>> | 80% | 39,639 psi | 83% | 2218 fps | 100% |
| Norma 203B | <<locked>> | 80% | 35,621 psi | 74% | 2178 fps | 97.3% |
| Norma URP | <<locked>> | 90% | 35,360 psi | 74% | 2218 fps | 95.6% |
| Ramshot Big Game | <<locked>> | 80% | 34,998 psi | 73% | 2188 fps | 96.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,223 psi | 55% | 1325 fps | 100% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 37,333 psi | 78% | 2267 fps | 97.2% |
| ReloadSwiss RS 60 | 43.2 gr | 80% | 30,850 psi | 64% | 2156 fps | 98.3% |
| ReloadSwiss RS 62 | 48.5 gr | 90% | 34,577 psi | 72% | 2228 fps | 95% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 37,956 psi | 79% | 2290 fps | 95% |
| Rottweil R 902 | <<locked>> | 80% | 37,681 psi | 79% | 2165 fps | 98.8% |
| Rottweil R 903 | <<locked>> | 80% | 30,937 psi | 65% | 2087 fps | 96.5% |
| Shooters World Long Rifle | <<locked>> | 90% | 39,798 psi | 83% | 2228 fps | 95.5% |
| Shooters World Match Rifle | <<locked>> | 80% | 38,798 psi | 81% | 2228 fps | 99.8% |
| Shooters World Precision | <<locked>> | 80% | 35,897 psi | 75% | 2152 fps | 98.5% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 32,039 psi | 67% | 2129 fps | 95.8% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 40,277 psi | 84% | 2231 fps | 96.5% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 38,769 psi | 81% | 2218 fps | 98% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 33,852 psi | 71% | 2057 fps | 99.9% |
| Somchem S335 | <<locked>> | 80% | 40,669 psi | 85% | 2175 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 39,885 psi | 83% | 2231 fps | 98.1% |
| Somchem S355 | <<locked>> | 80% | 32,111 psi | 67% | 2096 fps | 96.6% |
| Somchem S365 | <<locked>> | 84% | 26,237 psi | 55% | 2034 fps | 95.2% |
| Vihtavuori N135 | <<locked>> | 80% | 36,666 psi | 77% | 2152 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 37,434 psi | 78% | 2162 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 30,327 psi | 63% | 2044 fps | 97.4% |
| Vihtavuori N160 | <<locked>> | 88% | 34,882 psi | 73% | 2175 fps | 95.3% |
| Vihtavuori N540 | <<locked>> | 80% | 36,071 psi | 75% | 2152 fps | 99.7% |
| Vihtavuori N550 | <<locked>> | 90% | 36,274 psi | 76% | 2221 fps | 95.6% |
| Vihtavuori N555 | <<locked>> | 96% | 32,140 psi | 67% | 2201 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 30,879 psi | 65% | 2067 fps | 95.9% |
| Winchester StaBALL Match | <<locked>> | 80% | 37,985 psi | 79% | 2221 fps | 98.3% |
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 83 powders for 8 x 57 IRS loaded with the .323 | 220gr | Woodleigh PP SN. ReloadSwiss RS 60 delivers the highest muzzle velocity at 2,405 fps; across all powders the maximum-charge window runs from 1,450 fps to 2,405 fps. Accurate 3100 gives the best case fill at 100 %, and 83 of the 83 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (330 MPa), the top charges use 64–90 %, leaving at least 10 % headroom. The 220.0 gr projectile in 0.323" calls for a 1:14.0 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. ReloadSwiss RS 60, Alliant Reloder-17, ReloadSwiss RS 62 rank at the top here: for 8 x 57 IRS with the .323 | 220gr | Woodleigh PP SN they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate 2700, Accurate 3100, ADI AR 2209 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.