Load Specifications
Load data in caliber 8 x 57 IS with .323 | 200gr | Impala RNFP KO bullet and 81 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 60, ReloadSwiss RS 52 and Alliant Power Pro 2000-MR.
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% | 48,602 psi | 86% | 2375 fps | 100% |
| Accurate 2460 | <<locked>> | 82% | 49,908 psi | 88% | 2431 fps | 100% |
| Accurate 2495 | <<locked>> | 90% | 49,487 psi | 87% | 2434 fps | 100% |
| Accurate 2520 | <<locked>> | 86% | 50,836 psi | 90% | 2484 fps | 100% |
| Accurate 4064 | <<locked>> | 92% | 49,153 psi | 87% | 2470 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 46,456 psi | 82% | 2500 fps | 97.2% |
| ADI AR 2206H | <<locked>> | 88% | 49,893 psi | 88% | 2480 fps | 98.9% |
| ADI AR 2208 | <<locked>> | 94% | 50,372 psi | 89% | 2474 fps | 98.4% |
| ADI Benchmark 8208 | <<locked>> | 86% | 49,211 psi | 87% | 2444 fps | 99.5% |
| Alliant AR-Comp | <<locked>> | 86% | 48,588 psi | 86% | 2438 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 82% | 50,401 psi | 89% | 2530 fps | 99.4% |
| Alliant Power Pro 2000-MR | <<locked>> | 90% | 48,631 psi | 86% | 2562 fps | 98% |
| Alliant Reloder- TS 15.5 | <<locked>> | 94% | 49,980 psi | 88% | 2500 fps | 99.4% |
| Alliant Reloder-15 | <<locked>> | 92% | 50,633 psi | 90% | 2513 fps | 98.6% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 46,209 psi | 82% | 2497 fps | 97.2% |
| Alliant Reloder-17 | <<locked>> | 98% | 49,559 psi | 88% | 2585 fps | 99.2% |
| Baschieri & Pellagri 107 | <<locked>> | 88% | 48,921 psi | 86% | 2487 fps | 97.8% |
| Bofors RP3 | <<locked>> | 94% | 50,125 psi | 89% | 2510 fps | 99.5% |
| Hodgdon Benchmark | <<locked>> | 84% | 48,631 psi | 86% | 2392 fps | 99.7% |
| Hodgdon BL-C2 | <<locked>> | 88% | 50,966 psi | 90% | 2516 fps | 99.9% |
| Hodgdon CFE223 | <<locked>> | 84% | 48,704 psi | 86% | 2539 fps | 98.4% |
| Hodgdon H322 | <<locked>> | 82% | 49,690 psi | 88% | 2448 fps | 100% |
| Hodgdon H335 | <<locked>> | 82% | 50,314 psi | 89% | 2467 fps | 100% |
| Hodgdon H380 | <<locked>> | 92% | 48,370 psi | 86% | 2467 fps | 97% |
| Hodgdon H4895 | <<locked>> | 88% | 50,299 psi | 89% | 2490 fps | 99.3% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 42,598 psi | 75% | 2398 fps | 97.9% |
| Hodgdon LEVERevolution | <<locked>> | 90% | 48,269 psi | 85% | 2513 fps | 99.4% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,273 psi | 62% | 1509 fps | 100% |
| Hodgdon VARGET | <<locked>> | 88% | 48,385 psi | 86% | 2448 fps | 99% |
| IMR 3031 | <<locked>> | 88% | 49,226 psi | 87% | 2487 fps | 100% |
| IMR 4064 | <<locked>> | 92% | 50,241 psi | 89% | 2461 fps | 98.5% |
| IMR 4831ᴾ | <<locked>> | 100% | 44,425 psi | 79% | 2451 fps | 96.9% |
| IMR 4895 | <<locked>> | 90% | 48,762 psi | 86% | 2497 fps | 98.8% |
| IMR 8208 XBR | <<locked>> | 86% | 49,211 psi | 87% | 2444 fps | 99.5% |
| Lovex D073.5 | <<locked>> | 82% | 49,574 psi | 88% | 2438 fps | 99.8% |
| Lovex D073.6 | <<locked>> | 88% | 49,095 psi | 87% | 2470 fps | 100% |
| Lovex S060 | <<locked>> | 88% | 50,212 psi | 89% | 2418 fps | 98.9% |
| Lovex S062 | <<locked>> | 92% | 50,125 psi | 89% | 2467 fps | 99.6% |
| Lovex S065 | <<locked>> | 98% | 49,110 psi | 87% | 2451 fps | 96.2% |
| Norma 201 | <<locked>> | 88% | 49,530 psi | 88% | 2444 fps | 99.5% |
| Norma 202 | <<locked>> | 88% | 49,168 psi | 87% | 2448 fps | 100% |
| Norma 203B | <<locked>> | 92% | 49,879 psi | 88% | 2503 fps | 98.9% |
| Norma URPᴾ | <<locked>> | 100% | 46,383 psi | 82% | 2493 fps | 97.1% |
| Ramshot Big Game | <<locked>> | 92% | 49,458 psi | 87% | 2520 fps | 98.7% |
| Ramshot TAC | <<locked>> | 86% | 49,429 psi | 87% | 2448 fps | 96.5% |
| Ramshot Wild Boar | <<locked>> | 86% | 48,544 psi | 86% | 2470 fps | 98.6% |
| Ramshot X-Terminator | <<locked>> | 84% | 50,444 psi | 89% | 2444 fps | 98.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,636 psi | 63% | 1545 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 48,907 psi | 86% | 2431 fps | 99.9% |
| ReloadSwiss RS 52 | <<locked>> | 90% | 49,893 psi | 88% | 2566 fps | 98.5% |
| ReloadSwiss RS 60 | <<locked>> | 96% | 49,719 psi | 88% | 2598 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 45,992 psi | 81% | 2513 fps | 96.7% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 47,166 psi | 83% | 2523 fps | 95.9% |
| Rottweil R 901 | <<locked>> | 84% | 48,414 psi | 86% | 2398 fps | 100% |
| Rottweil R 902 | <<locked>> | 90% | 49,763 psi | 88% | 2441 fps | 99.5% |
| Rottweil R 903 | <<locked>> | 96% | 49,951 psi | 88% | 2500 fps | 99.3% |
| Shooters World Long Rifle | <<locked>> | 98% | 49,110 psi | 87% | 2451 fps | 96.2% |
| Shooters World Match Rifle | <<locked>> | 88% | 49,095 psi | 87% | 2470 fps | 100% |
| Shooters World Precision | <<locked>> | 92% | 50,125 psi | 89% | 2467 fps | 99.6% |
| SNPE Vectan SP 11 | <<locked>> | 96% | 51,010 psi | 90% | 2549 fps | 99% |
| SNPE Vectan SP 7 | <<locked>> | 88% | 50,734 psi | 90% | 2474 fps | 97.3% |
| SNPE Vectan SP 9 | <<locked>> | 90% | 51,169 psi | 90% | 2500 fps | 99% |
| SNPE Vectan Tubal 3000 | <<locked>> | 88% | 50,894 psi | 90% | 2395 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 94% | 50,227 psi | 89% | 2392 fps | 100% |
| Somchem S321 | <<locked>> | 84% | 50,082 psi | 89% | 2474 fps | 99.7% |
| Somchem S335 | <<locked>> | 88% | 50,430 psi | 89% | 2398 fps | 100% |
| Somchem S341 | <<locked>> | 88% | 50,024 psi | 88% | 2470 fps | 98.8% |
| Somchem S355 | <<locked>> | 96% | 50,676 psi | 90% | 2503 fps | 99.3% |
| Somchem S365ᴾ | <<locked>> | 100% | 41,742 psi | 74% | 2451 fps | 99% |
| Vihtavuori N130 | <<locked>> | 84% | 50,908 psi | 90% | 2369 fps | 100% |
| Vihtavuori N133 | <<locked>> | 88% | 50,720 psi | 90% | 2385 fps | 100% |
| Vihtavuori N135 | <<locked>> | 90% | 48,472 psi | 86% | 2418 fps | 100% |
| Vihtavuori N140 | <<locked>> | 90% | 49,313 psi | 87% | 2428 fps | 100% |
| Vihtavuori N150 | <<locked>> | 96% | 48,617 psi | 86% | 2441 fps | 99.7% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 48,602 psi | 86% | 2487 fps | 97.4% |
| Vihtavuori N530 | <<locked>> | 86% | 49,603 psi | 88% | 2444 fps | 99.6% |
| Vihtavuori N540 | <<locked>> | 92% | 50,647 psi | 90% | 2467 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 47,747 psi | 84% | 2497 fps | 97.1% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 49,647 psi | 88% | 2477 fps | 99.1% |
| Winchester 748 | <<locked>> | 86% | 48,283 psi | 85% | 2480 fps | 99.8% |
| Winchester StaBALL Match | <<locked>> | 90% | 50,662 psi | 90% | 2507 fps | 99.3% |
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% | 43,381 psi | 77% | 2297 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 46,760 psi | 83% | 2385 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 37,014 psi | 65% | 2241 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 41,901 psi | 74% | 2346 fps | 99.6% |
| Accurate 4064 | <<locked>> | 80% | 34,925 psi | 62% | 2224 fps | 99.3% |
| Accurate 4350 | <<locked>> | 94% | 38,334 psi | 68% | 2356 fps | 95.1% |
| ADI AR 2206H | <<locked>> | 80% | 39,494 psi | 70% | 2300 fps | 96.8% |
| ADI AR 2208 | <<locked>> | 84% | 37,942 psi | 67% | 2257 fps | 95.5% |
| ADI Benchmark 8208 | <<locked>> | 80% | 41,220 psi | 73% | 2310 fps | 98.4% |
| Alliant AR-Comp | <<locked>> | 80% | 40,321 psi | 71% | 2316 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 47,398 psi | 84% | 2484 fps | 99% |
| Alliant Power Pro 2000-MR | 44.8 gr | 84% | 40,306 psi | 71% | 2405 fps | 95.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 33,098 psi | 59% | 2192 fps | 95.9% |
| Alliant Reloder-15 | <<locked>> | 80% | 35,549 psi | 63% | 2241 fps | 95% |
| Alliant Reloder-16 | <<locked>> | 94% | 39,088 psi | 69% | 2359 fps | 95% |
| Alliant Reloder-17 | <<locked>> | 86% | 34,418 psi | 61% | 2287 fps | 95.3% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 38,159 psi | 67% | 2293 fps | 95.1% |
| Bofors RP3 | <<locked>> | 80% | 32,808 psi | 58% | 2198 fps | 96% |
| Hodgdon Benchmark | <<locked>> | 80% | 43,337 psi | 77% | 2306 fps | 99.1% |
| Hodgdon BL-C2 | <<locked>> | 80% | 39,494 psi | 70% | 2329 fps | 98.6% |
| Hodgdon CFE223 | <<locked>> | 80% | 42,757 psi | 76% | 2434 fps | 97.1% |
| Hodgdon H322 | <<locked>> | 80% | 46,746 psi | 83% | 2405 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 47,427 psi | 84% | 2425 fps | 100% |
| Hodgdon H380 | <<locked>> | 86% | 40,393 psi | 71% | 2329 fps | 95% |
| Hodgdon H4895 | <<locked>> | 80% | 39,711 psi | 70% | 2310 fps | 97.5% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 33,866 psi | 60% | 2221 fps | 95.2% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 35,592 psi | 63% | 2277 fps | 96.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,353 psi | 47% | 1345 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 38,130 psi | 67% | 2267 fps | 97% |
| IMR 3031 | <<locked>> | 80% | 38,696 psi | 68% | 2320 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 35,360 psi | 63% | 2195 fps | 95% |
| IMR 4831 | <<locked>> | 96% | 39,450 psi | 70% | 2359 fps | 95.5% |
| IMR 4895 | <<locked>> | 80% | 36,260 psi | 64% | 2267 fps | 96% |
| IMR 8208 XBR | <<locked>> | 80% | 41,220 psi | 73% | 2310 fps | 98.4% |
| Lovex D073.5 | <<locked>> | 80% | 46,456 psi | 82% | 2388 fps | 99.6% |
| Lovex D073.6 | <<locked>> | 80% | 38,072 psi | 67% | 2290 fps | 99.1% |
| Lovex S060 | <<locked>> | 80% | 40,030 psi | 71% | 2247 fps | 97% |
| Lovex S062 | <<locked>> | 80% | 35,418 psi | 63% | 2208 fps | 97.1% |
| Lovex S065 | <<locked>> | 96% | 46,369 psi | 82% | 2408 fps | 95.6% |
| Norma 201 | <<locked>> | 80% | 39,421 psi | 70% | 2270 fps | 98.1% |
| Norma 202 | <<locked>> | 80% | 38,972 psi | 69% | 2280 fps | 99.6% |
| Norma 203B | <<locked>> | 80% | 34,954 psi | 62% | 2231 fps | 95.5% |
| Norma URP | <<locked>> | 96% | 41,205 psi | 73% | 2398 fps | 95.7% |
| Ramshot Big Game | <<locked>> | 82% | 36,390 psi | 64% | 2280 fps | 95.6% |
| Ramshot TAC | <<locked>> | 82% | 43,714 psi | 77% | 2349 fps | 95.1% |
| Ramshot Wild Boar | <<locked>> | 80% | 40,263 psi | 71% | 2326 fps | 97% |
| Ramshot X-Terminator | <<locked>> | 80% | 44,483 psi | 79% | 2349 fps | 97.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,513 psi | 47% | 1375 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 46,050 psi | 81% | 2385 fps | 99.8% |
| ReloadSwiss RS 52 | 41.3 gr | 80% | 36,289 psi | 64% | 2316 fps | 95.2% |
| ReloadSwiss RS 60 | 42 gr | 80% | 30,647 psi | 54% | 2198 fps | 96.3% |
| ReloadSwiss RS 62 | <<locked>> | 96% | 40,611 psi | 72% | 2415 fps | 95.2% |
| ReloadSwiss RS 70 | <<locked>> | 98% | 44,208 psi | 78% | 2470 fps | 95% |
| Rottweil R 901 | <<locked>> | 80% | 43,381 psi | 77% | 2316 fps | 99.8% |
| Rottweil R 902 | <<locked>> | 80% | 37,579 psi | 66% | 2228 fps | 97.6% |
| Rottweil R 903 | <<locked>> | 82% | 32,953 psi | 58% | 2192 fps | 95.6% |
| Shooters World Long Rifle | <<locked>> | 96% | 46,369 psi | 82% | 2408 fps | 95.6% |
| Shooters World Match Rifle | <<locked>> | 80% | 38,072 psi | 67% | 2290 fps | 99.1% |
| Shooters World Precision | <<locked>> | 80% | 35,418 psi | 63% | 2208 fps | 97.1% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 35,650 psi | 63% | 2270 fps | 95.4% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 41,989 psi | 74% | 2329 fps | 95.3% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 37,840 psi | 67% | 2270 fps | 96.3% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 40,350 psi | 71% | 2231 fps | 99.7% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 33,359 psi | 59% | 2116 fps | 99.3% |
| Somchem S321 | <<locked>> | 80% | 44,280 psi | 78% | 2382 fps | 99.1% |
| Somchem S335 | <<locked>> | 80% | 40,277 psi | 71% | 2241 fps | 99.9% |
| Somchem S341 | <<locked>> | 80% | 38,870 psi | 69% | 2283 fps | 96.5% |
| Somchem S355 | <<locked>> | 80% | 32,039 psi | 57% | 2156 fps | 95% |
| Somchem S365 | <<locked>> | 90% | 31,285 psi | 55% | 2221 fps | 95.8% |
| Vihtavuori N130 | <<locked>> | 80% | 45,426 psi | 80% | 2293 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 40,263 psi | 71% | 2231 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 35,998 psi | 64% | 2221 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 36,753 psi | 65% | 2221 fps | 99.5% |
| Vihtavuori N150 | <<locked>> | 80% | 30,211 psi | 53% | 2100 fps | 95.9% |
| Vihtavuori N160 | <<locked>> | 94% | 40,640 psi | 72% | 2352 fps | 95.4% |
| Vihtavuori N530 | <<locked>> | 80% | 41,365 psi | 73% | 2310 fps | 98.5% |
| Vihtavuori N540 | <<locked>> | 80% | 35,462 psi | 63% | 2215 fps | 99% |
| Vihtavuori N550 | <<locked>> | 94% | 39,740 psi | 70% | 2356 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 34,592 psi | 61% | 2205 fps | 95.5% |
| Winchester 748 | <<locked>> | 80% | 40,089 psi | 71% | 2343 fps | 98.9% |
| Winchester StaBALL Match | <<locked>> | 80% | 37,057 psi | 66% | 2274 fps | 96.8% |
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 81 powders for 8 x 57 IS loaded with the .323 | 200gr | Impala RNFP KO. ReloadSwiss RS 60 delivers the highest muzzle velocity at 2,598 fps; across all powders the maximum-charge window runs from 1,509 fps to 2,598 fps. Accurate 4350 gives the best case fill at 100 %, and 81 of the 81 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (390 MPa), the top charges use 62–90 %, leaving at least 10 % headroom. The 200.0 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, ReloadSwiss RS 52, Alliant Power Pro 2000-MR rank at the top here: for 8 x 57 IS with the .323 | 200gr | Impala RNFP KO 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.