Load Specifications
Load data in caliber 8 x 57 IRS with .323 | 180gr | RWS Speed Tip Professional bullet and 56 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 Hodgdon LEVERevolution.
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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You can find more information in our FAQ: How can I use the Personalized Load Calculator?
Max Load - Barrel Length: 23.62"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 84% | 43,062 psi | 90% | 2467 fps | 100% |
| Accurate 2495 | <<locked>> | 90% | 42,221 psi | 88% | 2510 fps | 100% |
| Accurate 2520 | <<locked>> | 84% | 41,669 psi | 87% | 2513 fps | 99.2% |
| Accurate 4064 | <<locked>> | 92% | 42,105 psi | 88% | 2539 fps | 99.8% |
| ADI AR 2206H | <<locked>> | 86% | 41,945 psi | 88% | 2510 fps | 96.6% |
| ADI AR 2208 | <<locked>> | 92% | 43,062 psi | 90% | 2513 fps | 96% |
| ADI Benchmark 8208 | <<locked>> | 84% | 41,698 psi | 87% | 2480 fps | 97.8% |
| Alliant AR-Comp | <<locked>> | 86% | 43,004 psi | 90% | 2536 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 92% | 41,640 psi | 87% | 2530 fps | 97.5% |
| Alliant Reloder-15 | <<locked>> | 90% | 42,380 psi | 89% | 2543 fps | 96.2% |
| Alliant Reloder-17 | <<locked>> | 96% | 41,524 psi | 87% | 2598 fps | 96.7% |
| Bofors RP3 | <<locked>> | 92% | 41,089 psi | 86% | 2533 fps | 97.5% |
| Hodgdon Benchmark | <<locked>> | 82% | 41,452 psi | 87% | 2434 fps | 98.2% |
| Hodgdon BL-C2 | <<locked>> | 86% | 42,337 psi | 88% | 2546 fps | 98.5% |
| Hodgdon H4895 | <<locked>> | 86% | 42,177 psi | 88% | 2523 fps | 97.3% |
| Hodgdon LEVERevolution | <<locked>> | 90% | 43,047 psi | 90% | 2592 fps | 97.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,026 psi | 71% | 1601 fps | 100% |
| Hodgdon VARGET | <<locked>> | 86% | 40,901 psi | 85% | 2480 fps | 96.8% |
| IMR 3031 | <<locked>> | 86% | 40,843 psi | 85% | 2533 fps | 100% |
| IMR 4064 | <<locked>> | 90% | 42,554 psi | 89% | 2497 fps | 96.2% |
| IMR 4895 | <<locked>> | 88% | 40,785 psi | 85% | 2523 fps | 96.4% |
| IMR 8208 XBR | <<locked>> | 84% | 41,698 psi | 87% | 2480 fps | 97.8% |
| Lovex D073.6 | <<locked>> | 88% | 42,902 psi | 90% | 2546 fps | 99.3% |
| Lovex S060 | <<locked>> | 86% | 43,033 psi | 90% | 2464 fps | 96.9% |
| Lovex S062 | <<locked>> | 90% | 41,901 psi | 88% | 2500 fps | 98% |
| Norma 201 | <<locked>> | 86% | 41,249 psi | 86% | 2474 fps | 97.8% |
| Norma 202 | <<locked>> | 86% | 41,133 psi | 86% | 2487 fps | 99.5% |
| Norma 203B | <<locked>> | 90% | 41,582 psi | 87% | 2530 fps | 96.6% |
| Ramshot Big Game | <<locked>> | 90% | 41,466 psi | 87% | 2543 fps | 96.2% |
| Ramshot Wild Boar | <<locked>> | 86% | 43,279 psi | 90% | 2546 fps | 96.9% |
| Ramshot X-Terminator | <<locked>> | 82% | 42,482 psi | 89% | 2474 fps | 96.5% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 34,389 psi | 72% | 1644 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 94% | 41,553 psi | 87% | 2615 fps | 99% |
| Rottweil R 901 | <<locked>> | 84% | 42,583 psi | 89% | 2480 fps | 99.4% |
| Rottweil R 902 | <<locked>> | 88% | 41,423 psi | 87% | 2470 fps | 97.8% |
| Rottweil R 903 | <<locked>> | 94% | 41,002 psi | 86% | 2523 fps | 97.2% |
| Shooters World Match Rifle | <<locked>> | 88% | 42,902 psi | 90% | 2546 fps | 99.3% |
| Shooters World Precision | <<locked>> | 90% | 41,901 psi | 88% | 2500 fps | 98% |
| SNPE Vectan SP 11 | <<locked>> | 94% | 42,815 psi | 89% | 2575 fps | 96.7% |
| SNPE Vectan SP 9 | <<locked>> | 88% | 43,236 psi | 90% | 2533 fps | 96.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 43,279 psi | 90% | 2444 fps | 99.6% |
| SNPE Vectan Tubal 5000 | <<locked>> | 92% | 42,627 psi | 89% | 2444 fps | 99.9% |
| Somchem S321 | <<locked>> | 82% | 41,814 psi | 87% | 2507 fps | 98.1% |
| Somchem S335 | <<locked>> | 86% | 42,583 psi | 89% | 2448 fps | 99.9% |
| Somchem S341 | <<locked>> | 86% | 41,872 psi | 87% | 2500 fps | 96.4% |
| Somchem S355 | <<locked>> | 94% | 42,308 psi | 88% | 2533 fps | 97.3% |
| Somchem S365ᴾ | <<locked>> | 100% | 36,506 psi | 76% | 2500 fps | 96.8% |
| Vihtavuori N133 | <<locked>> | 86% | 43,207 psi | 90% | 2448 fps | 100% |
| Vihtavuori N135 | <<locked>> | 90% | 42,801 psi | 89% | 2510 fps | 100% |
| Vihtavuori N140 | <<locked>> | 88% | 41,495 psi | 87% | 2474 fps | 99.6% |
| Vihtavuori N150 | <<locked>> | 96% | 43,047 psi | 90% | 2520 fps | 98.6% |
| Vihtavuori N530 | <<locked>> | 84% | 41,727 psi | 87% | 2480 fps | 97.9% |
| Vihtavuori N540 | <<locked>> | 90% | 42,627 psi | 89% | 2510 fps | 99.5% |
| Winchester 6.5 StaBALL | <<locked>> | 98% | 41,959 psi | 88% | 2500 fps | 96.9% |
| Winchester 748 | <<locked>> | 86% | 42,902 psi | 90% | 2562 fps | 98.8% |
| Winchester StaBALL Match | <<locked>> | 88% | 42,293 psi | 88% | 2536 fps | 97.3% |
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% | 38,014 psi | 79% | 2379 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 30,414 psi | 64% | 2280 fps | 99.4% |
| Accurate 2520 | <<locked>> | 80% | 36,347 psi | 76% | 2411 fps | 98.2% |
| Accurate 4064 | <<locked>> | 80% | 28,776 psi | 60% | 2254 fps | 97% |
| ADI AR 2206H | <<locked>> | 82% | 36,985 psi | 77% | 2411 fps | 95.1% |
| ADI AR 2208 | <<locked>> | 90% | 40,553 psi | 85% | 2464 fps | 95.3% |
| ADI Benchmark 8208 | <<locked>> | 80% | 36,782 psi | 77% | 2382 fps | 96.5% |
| Alliant AR-Comp | <<locked>> | 80% | 35,056 psi | 73% | 2398 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 34,389 psi | 72% | 2382 fps | 95.4% |
| Alliant Reloder-15 | <<locked>> | 88% | 39,871 psi | 83% | 2493 fps | 95.4% |
| Alliant Reloder-17 | 51.6 gr | 94% | 38,943 psi | 81% | 2543 fps | 95.9% |
| Bofors RP3 | <<locked>> | 86% | 33,591 psi | 70% | 2379 fps | 95.2% |
| Hodgdon Benchmark | <<locked>> | 80% | 39,088 psi | 82% | 2388 fps | 97.7% |
| Hodgdon BL-C2 | <<locked>> | 80% | 34,389 psi | 72% | 2385 fps | 96.5% |
| Hodgdon H4895 | <<locked>> | 80% | 34,983 psi | 73% | 2372 fps | 95.1% |
| Hodgdon LEVERevolution | 46 gr | 84% | 35,592 psi | 74% | 2438 fps | 95.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,266 psi | 53% | 1430 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 36,027 psi | 75% | 2382 fps | 95.4% |
| IMR 3031 | <<locked>> | 80% | 33,591 psi | 70% | 2388 fps | 99.4% |
| IMR 4064 | <<locked>> | 88% | 39,842 psi | 83% | 2444 fps | 95.4% |
| IMR 4895 | <<locked>> | 86% | 38,130 psi | 80% | 2470 fps | 95.6% |
| IMR 8208 XBR | <<locked>> | 80% | 36,782 psi | 77% | 2382 fps | 96.5% |
| Lovex D073.6 | <<locked>> | 80% | 32,764 psi | 68% | 2343 fps | 97.2% |
| Lovex S060 | <<locked>> | 82% | 38,203 psi | 80% | 2369 fps | 95.5% |
| Lovex S062 | <<locked>> | 82% | 32,677 psi | 68% | 2310 fps | 95.2% |
| Norma 201 | <<locked>> | 80% | 34,200 psi | 71% | 2329 fps | 95.8% |
| Norma 202 | <<locked>> | 80% | 33,982 psi | 71% | 2343 fps | 98.1% |
| Norma 203B | <<locked>> | 86% | 36,608 psi | 76% | 2428 fps | 95% |
| Ramshot Big Game | <<locked>> | 88% | 38,856 psi | 81% | 2490 fps | 95.3% |
| Ramshot Wild Boar | <<locked>> | 82% | 37,971 psi | 79% | 2441 fps | 95.3% |
| Ramshot X-Terminator | <<locked>> | 80% | 39,900 psi | 83% | 2425 fps | 95.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 25,469 psi | 53% | 1467 fps | 100% |
| ReloadSwiss RS 60 | 47.2 gr | 86% | 32,097 psi | 67% | 2388 fps | 95.7% |
| Rottweil R 901 | <<locked>> | 80% | 37,753 psi | 79% | 2385 fps | 98.7% |
| Rottweil R 902 | <<locked>> | 80% | 32,518 psi | 68% | 2280 fps | 95.1% |
| Rottweil R 903 | <<locked>> | 90% | 35,911 psi | 75% | 2421 fps | 95.7% |
| Shooters World Match Rifle | <<locked>> | 80% | 32,764 psi | 68% | 2343 fps | 97.2% |
| Shooters World Precision | <<locked>> | 82% | 32,677 psi | 68% | 2310 fps | 95.2% |
| SNPE Vectan SP 11 | <<locked>> | 90% | 37,855 psi | 79% | 2477 fps | 95.1% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 37,956 psi | 79% | 2431 fps | 95.4% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 35,911 psi | 75% | 2306 fps | 98.5% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 29,240 psi | 61% | 2175 fps | 97.7% |
| Somchem S321 | <<locked>> | 80% | 39,146 psi | 82% | 2454 fps | 97.5% |
| Somchem S335 | <<locked>> | 80% | 35,389 psi | 74% | 2313 fps | 99% |
| Somchem S341 | <<locked>> | 84% | 38,986 psi | 81% | 2444 fps | 95.6% |
| Somchem S355 | <<locked>> | 88% | 35,041 psi | 73% | 2385 fps | 95.1% |
| Somchem S365 | <<locked>> | 96% | 32,213 psi | 67% | 2395 fps | 95% |
| Vihtavuori N133 | <<locked>> | 80% | 35,897 psi | 75% | 2316 fps | 99.8% |
| Vihtavuori N135 | <<locked>> | 80% | 30,980 psi | 65% | 2283 fps | 99.5% |
| Vihtavuori N140 | <<locked>> | 80% | 32,024 psi | 67% | 2283 fps | 97.9% |
| Vihtavuori N150 | <<locked>> | 86% | 31,314 psi | 65% | 2283 fps | 95.3% |
| Vihtavuori N530 | <<locked>> | 80% | 36,622 psi | 77% | 2379 fps | 96.6% |
| Vihtavuori N540 | <<locked>> | 80% | 30,821 psi | 64% | 2270 fps | 97% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 36,941 psi | 77% | 2398 fps | 95.2% |
| Winchester 748 | <<locked>> | 80% | 35,302 psi | 74% | 2411 fps | 97.1% |
| Winchester StaBALL Match | <<locked>> | 82% | 34,693 psi | 72% | 2382 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 80 powders for 8 x 57 IRS loaded with the .323 | 180gr | RWS Speed Tip Professional. ReloadSwiss RS 60 delivers the highest muzzle velocity at 2,615 fps; across all powders the maximum-charge window runs from 1,601 fps to 2,615 fps. Accurate 4350 gives the best case fill at 100 %, and 80 of the 80 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 180.0 gr projectile in 0.323" calls for a 1:13.0 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. ReloadSwiss RS 60, Alliant Reloder-17, Hodgdon LEVERevolution rank at the top here: for 8 x 57 IRS with the .323 | 180gr | RWS Speed Tip Professional they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate 4350, Alliant Power Pro 2000-MR, Alliant Reloder-16 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.