Load Specifications
Load data in caliber 8 x 57 IRS with .323 | 200gr | Sako Hammerhead 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 Alliant Reloder-16.
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% | 41,684 psi | 87% | 2369 fps | 100% |
| Accurate 4064 | <<locked>> | 88% | 41,742 psi | 87% | 2402 fps | 100% |
| Accurate 4350 | <<locked>> | 98% | 42,540 psi | 89% | 2480 fps | 96.9% |
| ADI AR 2206H | <<locked>> | 82% | 40,727 psi | 85% | 2369 fps | 97.6% |
| ADI AR 2208 | <<locked>> | 88% | 41,640 psi | 87% | 2372 fps | 97.1% |
| ADI Benchmark 8208 | <<locked>> | 82% | 42,815 psi | 89% | 2382 fps | 99% |
| Alliant AR-Comp | <<locked>> | 82% | 41,989 psi | 88% | 2382 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 86% | 42,047 psi | 88% | 2490 fps | 96.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 40,727 psi | 85% | 2392 fps | 98.5% |
| Alliant Reloder-15 | <<locked>> | 86% | 41,321 psi | 86% | 2402 fps | 97.3% |
| Alliant Reloder-16 | <<locked>> | 98% | 42,931 psi | 90% | 2487 fps | 97% |
| Alliant Reloder-17 | <<locked>> | 94% | 43,178 psi | 90% | 2523 fps | 98.6% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 42,467 psi | 89% | 2421 fps | 96.9% |
| Bofors RP3 | <<locked>> | 90% | 43,163 psi | 90% | 2448 fps | 99% |
| Hodgdon BL-C2 | <<locked>> | 82% | 41,133 psi | 86% | 2402 fps | 99.2% |
| Hodgdon H380 | <<locked>> | 88% | 41,640 psi | 87% | 2398 fps | 95.9% |
| Hodgdon H4895 | <<locked>> | 82% | 40,988 psi | 86% | 2382 fps | 98.2% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 41,742 psi | 87% | 2431 fps | 98.2% |
| Hodgdon LEVERevolution | <<locked>> | 86% | 42,018 psi | 88% | 2451 fps | 98.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,708 psi | 73% | 1532 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 42,032 psi | 88% | 2385 fps | 98.3% |
| IMR 3031 | <<locked>> | 84% | 42,815 psi | 89% | 2431 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 41,205 psi | 86% | 2359 fps | 97.3% |
| IMR 4831 | <<locked>> | 98% | 40,770 psi | 85% | 2431 fps | 96.5% |
| IMR 4895 | <<locked>> | 86% | 42,250 psi | 88% | 2431 fps | 98.1% |
| IMR 8208 XBR | <<locked>> | 82% | 42,815 psi | 89% | 2382 fps | 99% |
| Lovex D073.6 | <<locked>> | 84% | 41,756 psi | 87% | 2398 fps | 99.8% |
| Lovex S060 | <<locked>> | 82% | 41,597 psi | 87% | 2323 fps | 97.8% |
| Lovex S062 | <<locked>> | 86% | 40,799 psi | 85% | 2362 fps | 98.8% |
| Norma 201 | <<locked>> | 84% | 42,482 psi | 89% | 2375 fps | 99% |
| Norma 202 | <<locked>> | 84% | 42,743 psi | 89% | 2392 fps | 100% |
| Norma 203B | <<locked>> | 86% | 40,567 psi | 85% | 2392 fps | 97.6% |
| Norma URP | <<locked>> | 98% | 42,888 psi | 90% | 2477 fps | 96.8% |
| Ramshot Big Game | <<locked>> | 88% | 42,917 psi | 90% | 2454 fps | 97.9% |
| Ramshot Wild Boar | <<locked>> | 82% | 41,887 psi | 88% | 2402 fps | 97.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,186 psi | 74% | 1568 fps | 100% |
| ReloadSwiss RS 52 | <<locked>> | 86% | 43,062 psi | 90% | 2497 fps | 97.7% |
| ReloadSwiss RS 60 | <<locked>> | 92% | 43,163 psi | 90% | 2533 fps | 99.9% |
| ReloadSwiss RS 62 | <<locked>> | 98% | 42,554 psi | 89% | 2500 fps | 96.4% |
| Rottweil R 902 | <<locked>> | 86% | 42,902 psi | 90% | 2379 fps | 99% |
| Rottweil R 903 | <<locked>> | 92% | 43,047 psi | 90% | 2438 fps | 98.7% |
| Shooters World Match Rifle | <<locked>> | 84% | 41,756 psi | 87% | 2398 fps | 99.8% |
| Shooters World Precision | <<locked>> | 86% | 40,799 psi | 85% | 2362 fps | 98.8% |
| SNPE Vectan SP 11 | <<locked>> | 90% | 41,785 psi | 87% | 2441 fps | 97.8% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 41,785 psi | 87% | 2388 fps | 97.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 41,800 psi | 87% | 2300 fps | 99.9% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 41,350 psi | 86% | 2303 fps | 100% |
| Somchem S335 | <<locked>> | 82% | 41,162 psi | 86% | 2303 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 40,379 psi | 84% | 2356 fps | 97.4% |
| Somchem S355 | <<locked>> | 90% | 41,321 psi | 86% | 2395 fps | 98.2% |
| Somchem S365ᴾ | <<locked>> | 100% | 40,843 psi | 85% | 2480 fps | 99.2% |
| Vihtavuori N133 | <<locked>> | 82% | 41,916 psi | 88% | 2300 fps | 100% |
| Vihtavuori N135 | <<locked>> | 86% | 41,989 psi | 88% | 2365 fps | 100% |
| Vihtavuori N140 | <<locked>> | 86% | 43,091 psi | 90% | 2375 fps | 100% |
| Vihtavuori N150 | <<locked>> | 92% | 42,206 psi | 88% | 2385 fps | 99.3% |
| Vihtavuori N160 | <<locked>> | 96% | 42,337 psi | 88% | 2428 fps | 96.5% |
| Vihtavuori N530 | <<locked>> | 82% | 42,859 psi | 90% | 2379 fps | 99.1% |
| Vihtavuori N540 | <<locked>> | 86% | 41,263 psi | 86% | 2365 fps | 99.9% |
| Vihtavuori N550 | <<locked>> | 96% | 41,394 psi | 86% | 2431 fps | 96.1% |
| Winchester 6.5 StaBALL | <<locked>> | 96% | 43,279 psi | 90% | 2421 fps | 98.6% |
| Winchester 748 | <<locked>> | 82% | 41,930 psi | 88% | 2421 fps | 99.5% |
| Winchester StaBALL Match | <<locked>> | 84% | 41,031 psi | 86% | 2395 fps | 98.2% |
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% | 34,316 psi | 72% | 2241 fps | 100% |
| Accurate 4064 | <<locked>> | 80% | 32,474 psi | 68% | 2224 fps | 99.1% |
| Accurate 4350 | <<locked>> | 94% | 37,115 psi | 78% | 2379 fps | 95.3% |
| ADI AR 2206H | <<locked>> | 80% | 38,363 psi | 80% | 2323 fps | 97% |
| ADI AR 2208 | <<locked>> | 82% | 34,809 psi | 73% | 2234 fps | 95% |
| ADI Benchmark 8208 | <<locked>> | 80% | 40,335 psi | 84% | 2339 fps | 98.6% |
| Alliant AR-Comp | <<locked>> | 80% | 39,320 psi | 82% | 2339 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 36,869 psi | 77% | 2379 fps | 95.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 31,676 psi | 66% | 2205 fps | 95.9% |
| Alliant Reloder-15 | <<locked>> | 80% | 34,258 psi | 72% | 2260 fps | 95.1% |
| Alliant Reloder-16 | 48.4 gr | 94% | 38,203 psi | 80% | 2388 fps | 95.4% |
| Alliant Reloder-17 | 47.7 gr | 86% | 33,344 psi | 70% | 2310 fps | 95.5% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 37,101 psi | 78% | 2320 fps | 95.3% |
| Bofors RP3 | <<locked>> | 80% | 30,864 psi | 64% | 2201 fps | 95.7% |
| Hodgdon BL-C2 | <<locked>> | 80% | 38,247 psi | 80% | 2349 fps | 98.7% |
| Hodgdon H380 | <<locked>> | 86% | 38,986 psi | 81% | 2349 fps | 95.1% |
| Hodgdon H4895 | <<locked>> | 80% | 38,609 psi | 81% | 2336 fps | 97.6% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 32,648 psi | 68% | 2241 fps | 95.3% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 34,548 psi | 72% | 2300 fps | 96.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,686 psi | 54% | 1365 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 37,043 psi | 77% | 2290 fps | 97.1% |
| IMR 3031 | <<locked>> | 80% | 37,362 psi | 78% | 2336 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 34,142 psi | 71% | 2215 fps | 95.1% |
| IMR 4831 | <<locked>> | 96% | 38,392 psi | 80% | 2385 fps | 95.7% |
| IMR 4895 | <<locked>> | 80% | 35,041 psi | 73% | 2287 fps | 96.1% |
| IMR 8208 XBR | <<locked>> | 80% | 40,335 psi | 84% | 2339 fps | 98.6% |
| Lovex D073.6 | <<locked>> | 80% | 36,680 psi | 77% | 2306 fps | 99.1% |
| Lovex S060 | <<locked>> | 80% | 38,972 psi | 81% | 2274 fps | 97.2% |
| Lovex S062 | <<locked>> | 80% | 33,852 psi | 71% | 2221 fps | 97.1% |
| Norma 201 | <<locked>> | 80% | 37,637 psi | 79% | 2287 fps | 98.1% |
| Norma 202 | <<locked>> | 80% | 37,594 psi | 79% | 2300 fps | 99.6% |
| Norma 203B | <<locked>> | 80% | 33,649 psi | 70% | 2251 fps | 95.5% |
| Norma URP | <<locked>> | 94% | 37,782 psi | 79% | 2379 fps | 95.2% |
| Ramshot Big Game | <<locked>> | 82% | 35,346 psi | 74% | 2306 fps | 95.8% |
| Ramshot Wild Boar | <<locked>> | 80% | 39,262 psi | 82% | 2352 fps | 97.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 25,962 psi | 54% | 1398 fps | 100% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 35,288 psi | 74% | 2343 fps | 95.4% |
| ReloadSwiss RS 60 | 44.3 gr | 80% | 29,167 psi | 61% | 2211 fps | 96.3% |
| ReloadSwiss RS 62 | <<locked>> | 96% | 39,842 psi | 83% | 2448 fps | 95.6% |
| Rottweil R 902 | <<locked>> | 80% | 35,853 psi | 75% | 2244 fps | 97.6% |
| Rottweil R 903 | <<locked>> | 82% | 31,169 psi | 65% | 2201 fps | 95.5% |
| Shooters World Match Rifle | <<locked>> | 80% | 36,680 psi | 77% | 2306 fps | 99.1% |
| Shooters World Precision | <<locked>> | 80% | 33,852 psi | 71% | 2221 fps | 97.1% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 34,432 psi | 72% | 2290 fps | 95.5% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 36,912 psi | 77% | 2297 fps | 96.5% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 39,276 psi | 82% | 2257 fps | 99.7% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 32,256 psi | 67% | 2136 fps | 99.4% |
| Somchem S335 | <<locked>> | 80% | 38,812 psi | 81% | 2260 fps | 99.9% |
| Somchem S341 | <<locked>> | 80% | 37,782 psi | 79% | 2306 fps | 96.7% |
| Somchem S355 | <<locked>> | 82% | 32,271 psi | 67% | 2208 fps | 95.6% |
| Somchem S365 | <<locked>> | 90% | 29,791 psi | 62% | 2231 fps | 95.8% |
| Vihtavuori N133 | <<locked>> | 80% | 39,392 psi | 82% | 2257 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 34,722 psi | 73% | 2238 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 35,462 psi | 74% | 2241 fps | 99.5% |
| Vihtavuori N150 | <<locked>> | 80% | 28,631 psi | 60% | 2106 fps | 95.7% |
| Vihtavuori N160 | <<locked>> | 94% | 39,842 psi | 83% | 2385 fps | 95.8% |
| Vihtavuori N530 | <<locked>> | 80% | 40,074 psi | 84% | 2329 fps | 98.6% |
| Vihtavuori N540 | <<locked>> | 80% | 34,156 psi | 71% | 2228 fps | 99% |
| Vihtavuori N550 | <<locked>> | 94% | 39,001 psi | 81% | 2388 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 33,330 psi | 70% | 2221 fps | 95.6% |
| Winchester 748 | <<locked>> | 80% | 38,972 psi | 81% | 2365 fps | 99% |
| Winchester StaBALL Match | <<locked>> | 80% | 35,955 psi | 75% | 2297 fps | 97% |
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 | Sako Hammerhead. ReloadSwiss RS 60 delivers the highest muzzle velocity at 2,533 fps; across all powders the maximum-charge window runs from 1,532 fps to 2,533 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 73–90 %, leaving at least 10 % headroom. The 200.0 gr projectile in 0.323" calls for a 1:6.0 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, Alliant Reloder-16 rank at the top here: for 8 x 57 IRS with the .323 | 200gr | Sako Hammerhead 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.