Load Specifications
Load data in caliber 8 x 56 R M 89 Port. Krop. with .323 | 180gr | Fox Classic Hunter bullet and 65 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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Max Load - Barrel Length: 23.62"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 84% | 42,119 psi | 85% | 2464 fps | 100% |
| Accurate 2460 | <<locked>> | 82% | 43,033 psi | 87% | 2513 fps | 99.6% |
| Accurate 2495 | <<locked>> | 92% | 43,816 psi | 89% | 2549 fps | 100% |
| Accurate 2520 | <<locked>> | 86% | 43,874 psi | 89% | 2562 fps | 99.5% |
| Accurate 4064 | <<locked>> | 94% | 43,990 psi | 89% | 2585 fps | 99.9% |
| ADI AR 2206H | <<locked>> | 88% | 44,222 psi | 90% | 2566 fps | 97.3% |
| ADI AR 2208 | <<locked>> | 92% | 42,583 psi | 86% | 2516 fps | 96.1% |
| ADI Benchmark 8208 | <<locked>> | 86% | 43,772 psi | 89% | 2533 fps | 98.3% |
| Alliant AR-Comp | <<locked>> | 86% | 42,221 psi | 86% | 2533 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 82% | 44,353 psi | 90% | 2618 fps | 98% |
| Alliant Reloder- TS 15.5 | <<locked>> | 94% | 43,700 psi | 89% | 2579 fps | 98.1% |
| Alliant Reloder-15 | <<locked>> | 90% | 41,727 psi | 85% | 2543 fps | 96.2% |
| Alliant Reloder-17 | <<locked>> | 98% | 43,961 psi | 89% | 2661 fps | 97.6% |
| Baschieri & Pellagri 107 | <<locked>> | 88% | 43,337 psi | 88% | 2566 fps | 95.9% |
| Bofors RP3 | <<locked>> | 94% | 43,265 psi | 88% | 2582 fps | 98.1% |
| Hodgdon Benchmark | <<locked>> | 84% | 43,540 psi | 88% | 2484 fps | 98.7% |
| Hodgdon BL-C2 | <<locked>> | 88% | 44,599 psi | 90% | 2598 fps | 99% |
| Hodgdon CFE223 | <<locked>> | 84% | 43,091 psi | 87% | 2621 fps | 96.5% |
| Hodgdon H322 | <<locked>> | 82% | 44,193 psi | 90% | 2546 fps | 100% |
| Hodgdon H4895 | <<locked>> | 88% | 44,527 psi | 90% | 2579 fps | 97.9% |
| Hodgdon LEVERevolution | <<locked>> | 90% | 42,482 psi | 86% | 2592 fps | 97.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 33,953 psi | 69% | 1608 fps | 100% |
| Hodgdon VARGET | <<locked>> | 88% | 43,004 psi | 87% | 2533 fps | 97.5% |
| IMR 3031 | <<locked>> | 88% | 43,062 psi | 87% | 2579 fps | 100% |
| IMR 4064 | <<locked>> | 90% | 41,814 psi | 85% | 2497 fps | 96.2% |
| IMR 4895 | <<locked>> | 90% | 42,699 psi | 87% | 2572 fps | 97.1% |
| IMR 8208 XBR | <<locked>> | 86% | 43,772 psi | 89% | 2533 fps | 98.3% |
| Lovex D073.5 | <<locked>> | 82% | 42,859 psi | 87% | 2513 fps | 98.9% |
| Lovex D073.6 | <<locked>> | 88% | 42,163 psi | 86% | 2546 fps | 99.3% |
| Lovex S060 | <<locked>> | 86% | 42,554 psi | 86% | 2464 fps | 96.9% |
| Lovex S062 | <<locked>> | 92% | 43,845 psi | 89% | 2549 fps | 98.5% |
| Norma 201 | <<locked>> | 88% | 43,091 psi | 87% | 2523 fps | 98.3% |
| Norma 202 | <<locked>> | 88% | 43,163 psi | 88% | 2536 fps | 99.7% |
| Norma 203B | <<locked>> | 92% | 43,830 psi | 89% | 2585 fps | 97.3% |
| Ramshot Big Game | <<locked>> | 92% | 43,685 psi | 89% | 2598 fps | 97% |
| Ramshot Wild Boar | <<locked>> | 86% | 42,757 psi | 87% | 2546 fps | 96.9% |
| Ramshot X-Terminator | <<locked>> | 82% | 41,945 psi | 85% | 2477 fps | 96.5% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 33,982 psi | 69% | 1644 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 43,308 psi | 88% | 2520 fps | 99.2% |
| ReloadSwiss RS 52 | <<locked>> | 90% | 43,671 psi | 89% | 2644 fps | 96.7% |
| ReloadSwiss RS 60 | <<locked>> | 96% | 44,019 psi | 89% | 2677 fps | 99.5% |
| Rottweil R 901 | <<locked>> | 86% | 44,019 psi | 89% | 2520 fps | 99.7% |
| Rottweil R 902 | <<locked>> | 90% | 43,250 psi | 88% | 2516 fps | 98.3% |
| Rottweil R 903 | <<locked>> | 96% | 42,873 psi | 87% | 2569 fps | 97.8% |
| Shooters World Match Rifle | <<locked>> | 88% | 42,163 psi | 86% | 2546 fps | 99.3% |
| Shooters World Precision | <<locked>> | 92% | 43,845 psi | 89% | 2549 fps | 98.5% |
| SNPE Vectan SP 11 | <<locked>> | 94% | 42,467 psi | 86% | 2582 fps | 96.8% |
| SNPE Vectan SP 9 | <<locked>> | 88% | 42,670 psi | 87% | 2536 fps | 96.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 42,540 psi | 86% | 2444 fps | 99.6% |
| SNPE Vectan Tubal 5000 | <<locked>> | 94% | 44,585 psi | 90% | 2487 fps | 100% |
| Somchem S321 | <<locked>> | 84% | 44,019 psi | 89% | 2556 fps | 98.6% |
| Somchem S335 | <<locked>> | 88% | 44,541 psi | 90% | 2493 fps | 100% |
| Somchem S341 | <<locked>> | 88% | 44,222 psi | 90% | 2552 fps | 97.2% |
| Somchem S355 | <<locked>> | 96% | 44,251 psi | 90% | 2579 fps | 97.8% |
| Somchem S365ᴾ | <<locked>> | 100% | 35,766 psi | 73% | 2497 fps | 96.8% |
| Vihtavuori N130 | <<locked>> | 82% | 42,670 psi | 87% | 2431 fps | 100% |
| Vihtavuori N133 | <<locked>> | 86% | 42,540 psi | 86% | 2448 fps | 100% |
| Vihtavuori N135 | <<locked>> | 90% | 41,901 psi | 85% | 2507 fps | 100% |
| Vihtavuori N140 | <<locked>> | 90% | 43,540 psi | 88% | 2520 fps | 99.9% |
| Vihtavuori N150 | <<locked>> | 96% | 42,424 psi | 86% | 2520 fps | 98.6% |
| Vihtavuori N530 | <<locked>> | 86% | 43,830 psi | 89% | 2530 fps | 98.4% |
| Vihtavuori N540 | <<locked>> | 90% | 42,032 psi | 85% | 2513 fps | 99.5% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 44,367 psi | 90% | 2556 fps | 97.7% |
| Winchester 748 | <<locked>> | 86% | 42,409 psi | 86% | 2566 fps | 98.9% |
| Winchester StaBALL Match | <<locked>> | 88% | 41,727 psi | 85% | 2539 fps | 97.4% |
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% | 37,115 psi | 75% | 2372 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 40,190 psi | 82% | 2461 fps | 99.3% |
| Accurate 2495 | <<locked>> | 80% | 29,080 psi | 59% | 2264 fps | 99.3% |
| Accurate 2520 | <<locked>> | 80% | 35,375 psi | 72% | 2402 fps | 98.1% |
| Accurate 4064 | <<locked>> | 80% | 27,586 psi | 56% | 2238 fps | 96.7% |
| ADI AR 2206H | <<locked>> | 82% | 36,419 psi | 74% | 2411 fps | 95.1% |
| ADI AR 2208 | <<locked>> | 90% | 39,856 psi | 81% | 2464 fps | 95.3% |
| ADI Benchmark 8208 | <<locked>> | 80% | 36,027 psi | 73% | 2379 fps | 96.4% |
| Alliant AR-Comp | <<locked>> | 80% | 34,548 psi | 70% | 2398 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 41,336 psi | 84% | 2559 fps | 97.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 33,765 psi | 68% | 2379 fps | 95.4% |
| Alliant Reloder-15 | <<locked>> | 88% | 39,276 psi | 80% | 2493 fps | 95.4% |
| Alliant Reloder-17 | 51 gr | 92% | 36,071 psi | 73% | 2490 fps | 95% |
| Baschieri & Pellagri 107 | <<locked>> | 86% | 40,582 psi | 82% | 2513 fps | 95.1% |
| Bofors RP3 | <<locked>> | 86% | 32,822 psi | 67% | 2372 fps | 95.1% |
| Hodgdon Benchmark | <<locked>> | 80% | 38,406 psi | 78% | 2388 fps | 97.7% |
| Hodgdon BL-C2 | <<locked>> | 80% | 33,736 psi | 68% | 2385 fps | 96.4% |
| Hodgdon CFE223 | <<locked>> | 82% | 40,059 psi | 81% | 2559 fps | 95.6% |
| Hodgdon H322 | <<locked>> | 80% | 41,176 psi | 84% | 2493 fps | 99.9% |
| Hodgdon H4895 | <<locked>> | 80% | 34,200 psi | 69% | 2369 fps | 95% |
| Hodgdon LEVERevolution | 46.3 gr | 84% | 34,824 psi | 71% | 2431 fps | 95.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 24,990 psi | 51% | 1434 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 35,563 psi | 72% | 2382 fps | 95.4% |
| IMR 3031 | <<locked>> | 80% | 32,822 psi | 67% | 2382 fps | 99.4% |
| IMR 4064 | <<locked>> | 88% | 39,291 psi | 80% | 2448 fps | 95.5% |
| IMR 4895 | <<locked>> | 86% | 37,550 psi | 76% | 2470 fps | 95.6% |
| IMR 8208 XBR | <<locked>> | 80% | 36,027 psi | 73% | 2379 fps | 96.4% |
| Lovex D073.5 | <<locked>> | 80% | 39,813 psi | 81% | 2457 fps | 98.4% |
| Lovex D073.6 | <<locked>> | 80% | 31,792 psi | 64% | 2333 fps | 97% |
| Lovex S060 | <<locked>> | 82% | 37,550 psi | 76% | 2365 fps | 95.5% |
| Lovex S062 | <<locked>> | 82% | 31,792 psi | 64% | 2300 fps | 95.1% |
| Norma 201 | <<locked>> | 80% | 33,243 psi | 67% | 2320 fps | 95.6% |
| Norma 202 | <<locked>> | 80% | 33,388 psi | 68% | 2343 fps | 98.1% |
| Norma 203B | <<locked>> | 86% | 35,969 psi | 73% | 2428 fps | 95% |
| Ramshot Big Game | <<locked>> | 88% | 38,290 psi | 78% | 2490 fps | 95.4% |
| Ramshot Wild Boar | <<locked>> | 82% | 37,420 psi | 76% | 2441 fps | 95.3% |
| Ramshot X-Terminator | <<locked>> | 80% | 39,334 psi | 80% | 2428 fps | 95.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 25,121 psi | 51% | 1470 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 40,756 psi | 83% | 2474 fps | 98.8% |
| ReloadSwiss RS 52 | <<locked>> | 88% | 40,756 psi | 83% | 2585 fps | 95.8% |
| ReloadSwiss RS 60 | 47.6 gr | 86% | 31,488 psi | 64% | 2385 fps | 95.7% |
| Rottweil R 901 | <<locked>> | 80% | 36,622 psi | 74% | 2379 fps | 98.6% |
| Rottweil R 902 | <<locked>> | 82% | 33,591 psi | 68% | 2323 fps | 95.7% |
| Rottweil R 903 | <<locked>> | 90% | 35,099 psi | 71% | 2418 fps | 95.6% |
| Shooters World Match Rifle | <<locked>> | 80% | 31,792 psi | 64% | 2333 fps | 97% |
| Shooters World Precision | <<locked>> | 82% | 31,792 psi | 64% | 2300 fps | 95.1% |
| SNPE Vectan SP 11 | <<locked>> | 90% | 37,246 psi | 76% | 2474 fps | 95.1% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 37,391 psi | 76% | 2431 fps | 95.4% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 35,172 psi | 71% | 2303 fps | 98.5% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 28,514 psi | 58% | 2172 fps | 97.6% |
| Somchem S321 | <<locked>> | 80% | 38,537 psi | 78% | 2454 fps | 97.5% |
| Somchem S335 | <<locked>> | 80% | 34,548 psi | 70% | 2306 fps | 99% |
| Somchem S341 | <<locked>> | 84% | 38,435 psi | 78% | 2444 fps | 95.6% |
| Somchem S355 | <<locked>> | 88% | 34,330 psi | 70% | 2382 fps | 95% |
| Somchem S365 | <<locked>> | 98% | 33,678 psi | 68% | 2448 fps | 96% |
| Vihtavuori N130 | <<locked>> | 80% | 40,089 psi | 81% | 2388 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 35,215 psi | 71% | 2313 fps | 99.8% |
| Vihtavuori N135 | <<locked>> | 80% | 30,153 psi | 61% | 2277 fps | 99.4% |
| Vihtavuori N140 | <<locked>> | 80% | 31,444 psi | 64% | 2283 fps | 97.9% |
| Vihtavuori N150 | <<locked>> | 86% | 30,501 psi | 62% | 2274 fps | 95.1% |
| Vihtavuori N530 | <<locked>> | 80% | 35,882 psi | 73% | 2375 fps | 96.5% |
| Vihtavuori N540 | <<locked>> | 80% | 30,197 psi | 61% | 2267 fps | 96.9% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 36,303 psi | 74% | 2398 fps | 95.2% |
| Winchester 748 | <<locked>> | 80% | 34,534 psi | 70% | 2405 fps | 97% |
| Winchester StaBALL Match | <<locked>> | 82% | 34,069 psi | 69% | 2379 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 65 powders for 8 x 56 R M 89 Port. Krop. loaded with the .323 | 180gr | Fox Classic Hunter. ReloadSwiss RS 60 delivers the highest muzzle velocity at 2,677 fps; across all powders the maximum-charge window runs from 1,608 fps to 2,677 fps. Hodgdon TrailBoss gives the best case fill at 100 %, and 65 of the 65 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (340 MPa), the top charges use 69–90 %, leaving at least 10 % headroom. The 180.0 gr projectile in 0.323" calls for a 1:12.0 twist; slower twists will usually not stabilise this weight. Hodgdon TrailBoss, ReloadSwiss RS 14, Somchem S365 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 56 R M 89 Port. Krop. with the .323 | 180gr | Fox Classic Hunter 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.