Load Specifications
Load data in caliber 8 x 57 IRS with .323 | 200gr | Peregrine Plainsmaster (VLR-4) bullet and 62 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 52.
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 2015 | <<locked>> | 84% | 42,554 psi | 89% | 2313 fps | 100% |
| Accurate 2495 | <<locked>> | 90% | 41,466 psi | 87% | 2356 fps | 100% |
| Accurate 2520 | <<locked>> | 84% | 41,408 psi | 87% | 2365 fps | 99.5% |
| Accurate 4064 | <<locked>> | 92% | 41,655 psi | 87% | 2388 fps | 99.9% |
| ADI AR 2206H | <<locked>> | 86% | 41,829 psi | 87% | 2369 fps | 97.4% |
| ADI AR 2208 | <<locked>> | 92% | 42,786 psi | 89% | 2365 fps | 96.8% |
| ADI Benchmark 8208 | <<locked>> | 84% | 41,452 psi | 87% | 2336 fps | 98.4% |
| Alliant AR-Comp | <<locked>> | 86% | 42,801 psi | 89% | 2379 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 92% | 41,423 psi | 87% | 2385 fps | 98.2% |
| Alliant Reloder-15 | <<locked>> | 90% | 42,351 psi | 88% | 2398 fps | 97% |
| Alliant Reloder-17 | <<locked>> | 96% | 41,379 psi | 86% | 2457 fps | 97.6% |
| Baschieri & Pellagri 107 | <<locked>> | 86% | 40,857 psi | 85% | 2369 fps | 95.9% |
| Bofors RP3 | <<locked>> | 92% | 40,654 psi | 85% | 2385 fps | 98.2% |
| Hodgdon Benchmark | <<locked>> | 82% | 41,162 psi | 86% | 2290 fps | 98.8% |
| Hodgdon BL-C2 | <<locked>> | 86% | 42,148 psi | 88% | 2402 fps | 99% |
| Hodgdon CFE223 | <<locked>> | 82% | 40,567 psi | 85% | 2415 fps | 96.5% |
| Hodgdon H4895 | <<locked>> | 86% | 42,090 psi | 88% | 2379 fps | 98% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 37,478 psi | 78% | 2323 fps | 96.5% |
| Hodgdon LEVERevolution | <<locked>> | 90% | 42,931 psi | 90% | 2444 fps | 98.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 33,939 psi | 71% | 1493 fps | 100% |
| Hodgdon VARGET | <<locked>> | 86% | 40,872 psi | 85% | 2343 fps | 97.6% |
| IMR 3031 | <<locked>> | 86% | 40,828 psi | 85% | 2382 fps | 100% |
| IMR 4064 | <<locked>> | 90% | 42,351 psi | 88% | 2352 fps | 97% |
| IMR 4895 | <<locked>> | 88% | 40,553 psi | 85% | 2379 fps | 97.2% |
| IMR 8208 XBR | <<locked>> | 84% | 41,452 psi | 87% | 2336 fps | 98.4% |
| Lovex D073.5 | <<locked>> | 82% | 43,294 psi | 90% | 2365 fps | 99.3% |
| Lovex D073.6 | <<locked>> | 88% | 42,554 psi | 89% | 2395 fps | 99.6% |
| Lovex S060 | <<locked>> | 86% | 43,018 psi | 90% | 2320 fps | 97.6% |
| Lovex S062 | <<locked>> | 90% | 41,597 psi | 87% | 2356 fps | 98.5% |
| Norma 201 | <<locked>> | 86% | 40,814 psi | 85% | 2329 fps | 98.4% |
| Norma 202 | <<locked>> | 86% | 40,915 psi | 85% | 2343 fps | 99.8% |
| Norma 203B | <<locked>> | 90% | 41,553 psi | 87% | 2388 fps | 97.4% |
| Ramshot Big Game | <<locked>> | 90% | 41,466 psi | 87% | 2405 fps | 97.1% |
| Ramshot Wild Boar | <<locked>> | 86% | 43,207 psi | 90% | 2402 fps | 97.6% |
| Ramshot X-Terminator | <<locked>> | 82% | 42,525 psi | 89% | 2336 fps | 97.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 34,330 psi | 72% | 1532 fps | 100% |
| ReloadSwiss RS 52 | <<locked>> | 88% | 41,162 psi | 86% | 2438 fps | 96.7% |
| ReloadSwiss RS 60 | <<locked>> | 94% | 41,524 psi | 87% | 2474 fps | 99.5% |
| Rottweil R 901 | <<locked>> | 84% | 42,061 psi | 88% | 2329 fps | 99.7% |
| Rottweil R 902 | <<locked>> | 88% | 41,031 psi | 86% | 2323 fps | 98.4% |
| Rottweil R 903 | <<locked>> | 94% | 40,567 psi | 85% | 2375 fps | 97.9% |
| Shooters World Match Rifle | <<locked>> | 88% | 42,554 psi | 89% | 2395 fps | 99.6% |
| Shooters World Precision | <<locked>> | 90% | 41,597 psi | 87% | 2356 fps | 98.5% |
| SNPE Vectan SP 11 | <<locked>> | 94% | 42,627 psi | 89% | 2431 fps | 97.5% |
| SNPE Vectan SP 9 | <<locked>> | 88% | 43,091 psi | 90% | 2388 fps | 97.6% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 43,047 psi | 90% | 2297 fps | 99.8% |
| SNPE Vectan Tubal 5000 | <<locked>> | 92% | 42,395 psi | 89% | 2300 fps | 100% |
| Somchem S321 | <<locked>> | 82% | 41,568 psi | 87% | 2359 fps | 98.7% |
| Somchem S335 | <<locked>> | 86% | 42,192 psi | 88% | 2300 fps | 100% |
| Somchem S341 | <<locked>> | 86% | 41,611 psi | 87% | 2356 fps | 97.2% |
| Somchem S355 | <<locked>> | 94% | 41,843 psi | 87% | 2382 fps | 97.9% |
| Somchem S365ᴾ | <<locked>> | 100% | 36,114 psi | 75% | 2359 fps | 97.7% |
| Vihtavuori N133 | <<locked>> | 86% | 43,047 psi | 90% | 2297 fps | 100% |
| Vihtavuori N135 | <<locked>> | 90% | 42,598 psi | 89% | 2359 fps | 100% |
| Vihtavuori N140 | <<locked>> | 88% | 41,220 psi | 86% | 2326 fps | 99.9% |
| Vihtavuori N150 | <<locked>> | 96% | 42,931 psi | 90% | 2375 fps | 99.1% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 43,294 psi | 90% | 2418 fps | 96.1% |
| Vihtavuori N530 | <<locked>> | 84% | 41,524 psi | 87% | 2333 fps | 98.5% |
| Vihtavuori N540 | <<locked>> | 90% | 42,250 psi | 88% | 2362 fps | 99.8% |
| Winchester 6.5 StaBALL | <<locked>> | 98% | 41,916 psi | 88% | 2365 fps | 97.7% |
| Winchester 748 | <<locked>> | 86% | 43,018 psi | 90% | 2418 fps | 99.3% |
| Winchester StaBALL Match | <<locked>> | 88% | 42,076 psi | 88% | 2392 fps | 98% |
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% | 37,681 psi | 79% | 2234 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 29,573 psi | 62% | 2136 fps | 99.7% |
| Accurate 2520 | <<locked>> | 80% | 35,882 psi | 75% | 2267 fps | 98.7% |
| Accurate 4064 | <<locked>> | 80% | 28,036 psi | 59% | 2116 fps | 97.6% |
| ADI AR 2206H | <<locked>> | 80% | 34,577 psi | 72% | 2228 fps | 95.2% |
| ADI AR 2208 | <<locked>> | 88% | 37,826 psi | 79% | 2277 fps | 95.4% |
| ADI Benchmark 8208 | <<locked>> | 80% | 36,622 psi | 77% | 2244 fps | 97.3% |
| Alliant AR-Comp | <<locked>> | 80% | 34,983 psi | 73% | 2254 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 32,053 psi | 67% | 2198 fps | 95.5% |
| Alliant Reloder-15 | <<locked>> | 86% | 37,130 psi | 78% | 2300 fps | 95.5% |
| Alliant Reloder-17 | 46.3 gr | 90% | 33,924 psi | 71% | 2297 fps | 95% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 38,334 psi | 80% | 2320 fps | 95.1% |
| Bofors RP3 | <<locked>> | 84% | 31,082 psi | 65% | 2192 fps | 95.3% |
| Hodgdon Benchmark | <<locked>> | 80% | 38,870 psi | 81% | 2247 fps | 98.3% |
| Hodgdon BL-C2 | <<locked>> | 80% | 34,098 psi | 71% | 2247 fps | 97.3% |
| Hodgdon CFE223 | <<locked>> | 80% | 37,753 psi | 79% | 2359 fps | 95.6% |
| Hodgdon H4895 | <<locked>> | 80% | 34,795 psi | 73% | 2238 fps | 96% |
| Hodgdon Hybrid 100V | <<locked>> | 98% | 35,099 psi | 73% | 2274 fps | 95.6% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 32,909 psi | 69% | 2244 fps | 95.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,092 psi | 52% | 1332 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 33,504 psi | 70% | 2195 fps | 95.4% |
| IMR 3031 | <<locked>> | 80% | 33,214 psi | 69% | 2244 fps | 99.7% |
| IMR 4064 | <<locked>> | 86% | 37,391 psi | 78% | 2260 fps | 95.6% |
| IMR 4895 | <<locked>> | 84% | 35,534 psi | 74% | 2280 fps | 95.8% |
| IMR 8208 XBR | <<locked>> | 80% | 36,622 psi | 77% | 2244 fps | 97.3% |
| Lovex D073.5 | <<locked>> | 80% | 40,248 psi | 84% | 2316 fps | 98.9% |
| Lovex D073.6 | <<locked>> | 80% | 32,358 psi | 68% | 2205 fps | 97.8% |
| Lovex S060 | <<locked>> | 80% | 35,708 psi | 75% | 2185 fps | 95.6% |
| Lovex S062 | <<locked>> | 80% | 30,226 psi | 63% | 2126 fps | 95.3% |
| Norma 201 | <<locked>> | 80% | 33,678 psi | 70% | 2188 fps | 96.5% |
| Norma 202 | <<locked>> | 80% | 33,678 psi | 70% | 2205 fps | 98.7% |
| Norma 203B | <<locked>> | 84% | 34,069 psi | 71% | 2241 fps | 95.1% |
| Ramshot Big Game | <<locked>> | 86% | 36,245 psi | 76% | 2303 fps | 95.5% |
| Ramshot Wild Boar | <<locked>> | 80% | 35,375 psi | 74% | 2254 fps | 95.4% |
| Ramshot X-Terminator | <<locked>> | 80% | 39,668 psi | 83% | 2287 fps | 96.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 25,295 psi | 53% | 1365 fps | 100% |
| ReloadSwiss RS 52 | 42.6 gr | 84% | 35,998 psi | 75% | 2336 fps | 95% |
| ReloadSwiss RS 60 | 43.2 gr | 84% | 29,762 psi | 62% | 2205 fps | 95.8% |
| Rottweil R 901 | <<locked>> | 80% | 37,115 psi | 78% | 2238 fps | 99.1% |
| Rottweil R 902 | <<locked>> | 80% | 32,082 psi | 67% | 2146 fps | 95.9% |
| Rottweil R 903 | <<locked>> | 88% | 33,243 psi | 69% | 2234 fps | 95.8% |
| Shooters World Match Rifle | <<locked>> | 80% | 32,358 psi | 68% | 2205 fps | 97.8% |
| Shooters World Precision | <<locked>> | 80% | 30,226 psi | 63% | 2126 fps | 95.3% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 35,201 psi | 74% | 2287 fps | 95.2% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 35,462 psi | 74% | 2247 fps | 95.5% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 35,607 psi | 74% | 2169 fps | 99% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 28,906 psi | 60% | 2047 fps | 98.3% |
| Somchem S321 | <<locked>> | 80% | 38,986 psi | 81% | 2313 fps | 98.2% |
| Somchem S335 | <<locked>> | 80% | 34,983 psi | 73% | 2172 fps | 99.4% |
| Somchem S341 | <<locked>> | 82% | 36,289 psi | 76% | 2257 fps | 95.7% |
| Somchem S355 | <<locked>> | 86% | 32,518 psi | 68% | 2201 fps | 95.1% |
| Somchem S365 | <<locked>> | 94% | 29,950 psi | 63% | 2215 fps | 95.1% |
| Vihtavuori N133 | <<locked>> | 80% | 35,665 psi | 75% | 2175 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 30,632 psi | 64% | 2146 fps | 99.7% |
| Vihtavuori N140 | <<locked>> | 80% | 31,734 psi | 66% | 2149 fps | 98.5% |
| Vihtavuori N150 | <<locked>> | 84% | 28,964 psi | 61% | 2103 fps | 95.3% |
| Vihtavuori N160 | <<locked>> | 98% | 40,553 psi | 85% | 2369 fps | 95.3% |
| Vihtavuori N530 | <<locked>> | 80% | 36,332 psi | 76% | 2238 fps | 97.3% |
| Vihtavuori N540 | <<locked>> | 80% | 30,458 psi | 64% | 2136 fps | 97.7% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 34,330 psi | 72% | 2218 fps | 95.2% |
| Winchester 748 | <<locked>> | 80% | 34,998 psi | 73% | 2270 fps | 97.8% |
| Winchester StaBALL Match | <<locked>> | 80% | 32,097 psi | 67% | 2192 fps | 95% |
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 62 powders for 8 x 57 IRS loaded with the .323 | 200gr | Peregrine Plainsmaster (VLR-4). ReloadSwiss RS 60 delivers the highest muzzle velocity at 2,474 fps; across all powders the maximum-charge window runs from 1,493 fps to 2,474 fps. Hodgdon Hybrid 100V gives the best case fill at 100 %, and 62 of the 62 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (330 MPa), the top charges use 71–90 %, leaving at least 10 % headroom. The 200.0 gr projectile in 0.323" calls for a 1:11.5 twist; slower twists will usually not stabilise this weight. Hodgdon Hybrid 100V, Hodgdon TrailBoss, ReloadSwiss RS 14 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 52 rank at the top here: for 8 x 57 IRS with the .323 | 200gr | Peregrine Plainsmaster (VLR-4) 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.