Load Specifications
Load data in caliber 8 x 57 IRS with .323 | 206gr | Peregrine VLR5 (VLR-5) bullet and 67 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Power Pro 2000-MR, ReloadSwiss RS 60 and Alliant Reloder-17.
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>> | 82% | 41,075 psi | 86% | 2254 fps | 100% |
| Accurate 2495 | <<locked>> | 90% | 42,772 psi | 89% | 2339 fps | 100% |
| Accurate 2520 | <<locked>> | 84% | 42,598 psi | 89% | 2349 fps | 99.8% |
| Accurate 4064 | <<locked>> | 92% | 42,960 psi | 90% | 2372 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 41,176 psi | 86% | 2402 fps | 96.4% |
| ADI AR 2206H | <<locked>> | 86% | 42,888 psi | 90% | 2352 fps | 97.9% |
| ADI AR 2208 | <<locked>> | 90% | 41,365 psi | 86% | 2310 fps | 96.9% |
| ADI Benchmark 8208 | <<locked>> | 84% | 42,467 psi | 89% | 2320 fps | 98.8% |
| Alliant AR-Comp | <<locked>> | 84% | 41,321 psi | 86% | 2320 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 88% | 41,684 psi | 87% | 2421 fps | 96.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 92% | 42,583 psi | 89% | 2369 fps | 98.7% |
| Alliant Reloder-15 | <<locked>> | 88% | 40,712 psi | 85% | 2336 fps | 97% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 42,395 psi | 89% | 2415 fps | 96.6% |
| Alliant Reloder-17 | <<locked>> | 96% | 42,496 psi | 89% | 2448 fps | 98.3% |
| Baschieri & Pellagri 107 | <<locked>> | 86% | 41,930 psi | 88% | 2356 fps | 96.6% |
| Bofors RP3 | <<locked>> | 92% | 41,901 psi | 88% | 2372 fps | 98.7% |
| Hodgdon Benchmark | <<locked>> | 82% | 42,076 psi | 88% | 2274 fps | 99.1% |
| Hodgdon BL-C2 | <<locked>> | 84% | 40,321 psi | 84% | 2336 fps | 99% |
| Hodgdon CFE223 | <<locked>> | 82% | 41,684 psi | 87% | 2405 fps | 97.2% |
| Hodgdon H4895 | <<locked>> | 86% | 43,178 psi | 90% | 2365 fps | 98.5% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 38,508 psi | 80% | 2313 fps | 97.2% |
| Hodgdon LEVERevolution | <<locked>> | 88% | 41,307 psi | 86% | 2382 fps | 98.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,084 psi | 71% | 1473 fps | 100% |
| Hodgdon VARGET | <<locked>> | 86% | 41,887 psi | 88% | 2326 fps | 98.1% |
| IMR 3031 | <<locked>> | 86% | 42,047 psi | 88% | 2365 fps | 100% |
| IMR 4064 | <<locked>> | 88% | 40,683 psi | 85% | 2290 fps | 97% |
| IMR 4831ᴾ | <<locked>> | 100% | 39,914 psi | 83% | 2359 fps | 96% |
| IMR 4895 | <<locked>> | 88% | 41,669 psi | 87% | 2365 fps | 97.8% |
| IMR 8208 XBR | <<locked>> | 84% | 42,467 psi | 89% | 2320 fps | 98.8% |
| Lovex D073.6 | <<locked>> | 86% | 40,959 psi | 86% | 2336 fps | 99.6% |
| Lovex S060 | <<locked>> | 84% | 41,263 psi | 86% | 2257 fps | 97.6% |
| Lovex S062 | <<locked>> | 90% | 42,714 psi | 89% | 2339 fps | 99% |
| Norma 201 | <<locked>> | 86% | 41,858 psi | 87% | 2313 fps | 98.8% |
| Norma 202 | <<locked>> | 86% | 41,989 psi | 88% | 2326 fps | 99.9% |
| Norma 203B | <<locked>> | 90% | 42,699 psi | 89% | 2375 fps | 98% |
| Norma URPᴾ | <<locked>> | 100% | 42,177 psi | 88% | 2405 fps | 96.4% |
| Ramshot Big Game | <<locked>> | 90% | 42,598 psi | 89% | 2392 fps | 97.7% |
| Ramshot Wild Boar | <<locked>> | 84% | 41,611 psi | 87% | 2339 fps | 97.6% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 34,505 psi | 72% | 1509 fps | 100% |
| ReloadSwiss RS 52 | <<locked>> | 88% | 42,380 psi | 89% | 2428 fps | 97.4% |
| ReloadSwiss RS 60 | <<locked>> | 94% | 42,627 psi | 89% | 2461 fps | 99.8% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 41,379 psi | 86% | 2418 fps | 95.9% |
| Rottweil R 901 | <<locked>> | 84% | 43,091 psi | 90% | 2310 fps | 99.9% |
| Rottweil R 902 | <<locked>> | 88% | 42,076 psi | 88% | 2310 fps | 98.8% |
| Rottweil R 903 | <<locked>> | 94% | 41,814 psi | 87% | 2362 fps | 98.4% |
| Shooters World Match Rifle | <<locked>> | 86% | 40,959 psi | 86% | 2336 fps | 99.6% |
| Shooters World Precision | <<locked>> | 90% | 42,714 psi | 89% | 2339 fps | 99% |
| SNPE Vectan SP 11 | <<locked>> | 92% | 41,060 psi | 86% | 2372 fps | 97.4% |
| SNPE Vectan SP 7 | <<locked>> | 86% | 43,134 psi | 90% | 2339 fps | 96% |
| SNPE Vectan SP 9 | <<locked>> | 86% | 41,423 psi | 87% | 2326 fps | 97.6% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 41,452 psi | 87% | 2238 fps | 99.8% |
| SNPE Vectan Tubal 5000 | <<locked>> | 90% | 40,886 psi | 85% | 2241 fps | 100% |
| Somchem S321 | <<locked>> | 82% | 42,641 psi | 89% | 2346 fps | 99.1% |
| Somchem S335 | <<locked>> | 86% | 43,207 psi | 90% | 2280 fps | 100% |
| Somchem S341 | <<locked>> | 86% | 42,743 psi | 89% | 2339 fps | 97.8% |
| Somchem S355 | <<locked>> | 94% | 43,018 psi | 90% | 2369 fps | 98.4% |
| Somchem S365ᴾ | <<locked>> | 100% | 37,173 psi | 78% | 2352 fps | 98.3% |
| Vihtavuori N133 | <<locked>> | 84% | 41,510 psi | 87% | 2241 fps | 100% |
| Vihtavuori N135 | <<locked>> | 88% | 40,901 psi | 85% | 2297 fps | 100% |
| Vihtavuori N140 | <<locked>> | 88% | 42,322 psi | 88% | 2310 fps | 100% |
| Vihtavuori N150 | <<locked>> | 94% | 41,263 psi | 86% | 2313 fps | 99.1% |
| Vihtavuori N160 | <<locked>> | 98% | 41,684 psi | 87% | 2359 fps | 96.1% |
| Vihtavuori N530 | <<locked>> | 84% | 42,569 psi | 89% | 2320 fps | 98.9% |
| Vihtavuori N540 | <<locked>> | 88% | 40,654 psi | 85% | 2300 fps | 99.8% |
| Winchester 6.5 StaBALL | <<locked>> | 98% | 42,975 psi | 90% | 2352 fps | 98.3% |
| Winchester 748 | <<locked>> | 84% | 41,379 psi | 86% | 2356 fps | 99.3% |
| Winchester StaBALL Match | <<locked>> | 88% | 43,236 psi | 90% | 2375 fps | 98.5% |
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% | 38,653 psi | 81% | 2215 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 30,530 psi | 64% | 2123 fps | 99.9% |
| Accurate 2520 | <<locked>> | 80% | 36,941 psi | 77% | 2254 fps | 99.1% |
| Accurate 4064 | <<locked>> | 80% | 28,950 psi | 60% | 2106 fps | 98.2% |
| Accurate 4350 | <<locked>> | 98% | 38,305 psi | 80% | 2349 fps | 95.5% |
| ADI AR 2206H | <<locked>> | 80% | 35,462 psi | 74% | 2215 fps | 96% |
| ADI AR 2208 | <<locked>> | 86% | 36,564 psi | 76% | 2218 fps | 95.4% |
| ADI Benchmark 8208 | <<locked>> | 80% | 37,521 psi | 78% | 2231 fps | 97.8% |
| Alliant AR-Comp | <<locked>> | 80% | 36,027 psi | 75% | 2238 fps | 100% |
| Alliant Power Pro 2000-MR | 45 gr | 86% | 39,102 psi | 82% | 2369 fps | 95.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 30,835 psi | 64% | 2139 fps | 95.5% |
| Alliant Reloder-15 | <<locked>> | 84% | 35,708 psi | 75% | 2241 fps | 95.5% |
| Alliant Reloder-16 | <<locked>> | 98% | 39,769 psi | 83% | 2362 fps | 95.7% |
| Alliant Reloder-17 | 46.3 gr | 90% | 34,824 psi | 73% | 2290 fps | 95.9% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 36,666 psi | 77% | 2257 fps | 95% |
| Bofors RP3 | <<locked>> | 82% | 29,892 psi | 62% | 2133 fps | 95.2% |
| Hodgdon Benchmark | <<locked>> | 80% | 39,726 psi | 83% | 2231 fps | 98.8% |
| Hodgdon BL-C2 | <<locked>> | 80% | 35,085 psi | 73% | 2238 fps | 97.9% |
| Hodgdon CFE223 | <<locked>> | 80% | 38,769 psi | 81% | 2349 fps | 96.4% |
| Hodgdon H4895 | <<locked>> | 80% | 35,708 psi | 75% | 2224 fps | 96.7% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 33,997 psi | 71% | 2221 fps | 95.7% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 31,647 psi | 66% | 2185 fps | 95.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,222 psi | 53% | 1312 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 34,360 psi | 72% | 2182 fps | 96.2% |
| IMR 3031 | <<locked>> | 80% | 34,185 psi | 71% | 2228 fps | 99.9% |
| IMR 4064 | <<locked>> | 84% | 35,882 psi | 75% | 2201 fps | 95.5% |
| IMR 4831 | <<locked>> | 98% | 37,347 psi | 78% | 2310 fps | 95.2% |
| IMR 4895 | <<locked>> | 82% | 34,171 psi | 71% | 2218 fps | 95.7% |
| IMR 8208 XBR | <<locked>> | 80% | 37,521 psi | 78% | 2231 fps | 97.8% |
| Lovex D073.6 | <<locked>> | 80% | 33,344 psi | 70% | 2195 fps | 98.4% |
| Lovex S060 | <<locked>> | 80% | 36,506 psi | 76% | 2169 fps | 96.3% |
| Lovex S062 | <<locked>> | 80% | 31,053 psi | 65% | 2113 fps | 96% |
| Norma 201 | <<locked>> | 80% | 34,548 psi | 72% | 2175 fps | 97.2% |
| Norma 202 | <<locked>> | 80% | 34,577 psi | 72% | 2192 fps | 99.1% |
| Norma 203B | <<locked>> | 82% | 32,750 psi | 68% | 2182 fps | 95.1% |
| Norma URP | <<locked>> | 98% | 39,479 psi | 82% | 2356 fps | 95.6% |
| Ramshot Big Game | <<locked>> | 84% | 34,708 psi | 73% | 2241 fps | 95.4% |
| Ramshot Wild Boar | <<locked>> | 80% | 36,318 psi | 76% | 2241 fps | 96.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 25,440 psi | 53% | 1345 fps | 100% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 34,621 psi | 72% | 2274 fps | 95% |
| ReloadSwiss RS 60 | 42.2 gr | 82% | 28,645 psi | 60% | 2146 fps | 95.7% |
| ReloadSwiss RS 62 | <<locked>> | 98% | 38,711 psi | 81% | 2369 fps | 95% |
| Rottweil R 901 | <<locked>> | 80% | 38,029 psi | 79% | 2224 fps | 99.5% |
| Rottweil R 902 | <<locked>> | 80% | 32,909 psi | 69% | 2133 fps | 96.6% |
| Rottweil R 903 | <<locked>> | 86% | 32,198 psi | 67% | 2178 fps | 95.8% |
| Shooters World Match Rifle | <<locked>> | 80% | 33,344 psi | 70% | 2195 fps | 98.4% |
| Shooters World Precision | <<locked>> | 80% | 31,053 psi | 65% | 2113 fps | 96% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 33,895 psi | 71% | 2228 fps | 95.2% |
| SNPE Vectan SP 7 | <<locked>> | 84% | 40,103 psi | 84% | 2287 fps | 95.1% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 33,910 psi | 71% | 2182 fps | 95.4% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 36,434 psi | 76% | 2152 fps | 99.3% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 29,646 psi | 62% | 2034 fps | 98.8% |
| Somchem S321 | <<locked>> | 80% | 40,001 psi | 84% | 2300 fps | 98.7% |
| Somchem S335 | <<locked>> | 80% | 35,839 psi | 75% | 2156 fps | 99.7% |
| Somchem S341 | <<locked>> | 80% | 34,911 psi | 73% | 2198 fps | 95.6% |
| Somchem S355 | <<locked>> | 84% | 31,256 psi | 65% | 2142 fps | 95.1% |
| Somchem S365 | <<locked>> | 92% | 28,863 psi | 60% | 2159 fps | 95.1% |
| Vihtavuori N133 | <<locked>> | 80% | 36,535 psi | 76% | 2159 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 31,546 psi | 66% | 2129 fps | 99.9% |
| Vihtavuori N140 | <<locked>> | 80% | 32,590 psi | 68% | 2136 fps | 99% |
| Vihtavuori N150 | <<locked>> | 82% | 27,818 psi | 58% | 2044 fps | 95.2% |
| Vihtavuori N160 | <<locked>> | 96% | 39,015 psi | 82% | 2310 fps | 95.3% |
| Vihtavuori N530 | <<locked>> | 80% | 37,246 psi | 78% | 2224 fps | 97.9% |
| Vihtavuori N540 | <<locked>> | 80% | 31,299 psi | 65% | 2123 fps | 98.2% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 32,851 psi | 69% | 2159 fps | 95.1% |
| Winchester 748 | <<locked>> | 80% | 35,969 psi | 75% | 2257 fps | 98.4% |
| Winchester StaBALL Match | <<locked>> | 80% | 32,967 psi | 69% | 2182 fps | 95.8% |
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 67 powders for 8 x 57 IRS loaded with the .323 | 206gr | Peregrine VLR5 (VLR-5). ReloadSwiss RS 60 delivers the highest muzzle velocity at 2,461 fps; across all powders the maximum-charge window runs from 1,473 fps to 2,461 fps. Accurate 4350 gives the best case fill at 100 %, and 67 of the 67 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 206.0 gr projectile in 0.323" calls for a 1:11.5 twist; slower twists will usually not stabilise this weight. Accurate 4350, Alliant Reloder-16, Hodgdon Hybrid 100V 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 Power Pro 2000-MR, ReloadSwiss RS 60, Alliant Reloder-17 rank at the top here: for 8 x 57 IRS with the .323 | 206gr | Peregrine VLR5 (VLR-5) 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.