Load Specifications
Load data in caliber 8 x 56 R M 89 Port. Krop. with .323 | 160gr | Fox Classic Hunter bullet and 57 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 60, Hodgdon LEVERevolution and Winchester 748.
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>> | 86% | 42,235 psi | 86% | 2628 fps | 100% |
| Accurate 2460 | <<locked>> | 84% | 42,975 psi | 87% | 2671 fps | 99% |
| Accurate 2495 | <<locked>> | 94% | 43,540 psi | 88% | 2710 fps | 100% |
| Accurate 2520 | <<locked>> | 88% | 43,700 psi | 89% | 2720 fps | 98.9% |
| Accurate 4064 | <<locked>> | 96% | 43,511 psi | 88% | 2740 fps | 99.5% |
| ADI AR 2206H | <<locked>> | 90% | 44,179 psi | 90% | 2723 fps | 96.2% |
| ADI Benchmark 8208 | <<locked>> | 88% | 43,918 psi | 89% | 2690 fps | 97.4% |
| Alliant AR-Comp | <<locked>> | 88% | 42,177 psi | 86% | 2703 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 84% | 44,237 psi | 90% | 2779 fps | 96.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 96% | 43,439 psi | 88% | 2730 fps | 97% |
| Alliant Reloder-10x | <<locked>> | 82% | 42,554 psi | 86% | 2644 fps | 100% |
| Alliant Reloder-17ᴾ | <<locked>> | 100% | 44,164 psi | 90% | 2808 fps | 96.3% |
| Bofors RP3 | <<locked>> | 96% | 43,033 psi | 87% | 2736 fps | 97.1% |
| Hodgdon Benchmark | <<locked>> | 86% | 43,743 psi | 89% | 2644 fps | 97.9% |
| Hodgdon BL-C2 | <<locked>> | 90% | 44,556 psi | 90% | 2756 fps | 98.2% |
| Hodgdon H322 | <<locked>> | 84% | 44,251 psi | 90% | 2713 fps | 99.8% |
| Hodgdon H335 | <<locked>> | 82% | 41,930 psi | 85% | 2674 fps | 99% |
| Hodgdon H4895 | <<locked>> | 90% | 44,425 psi | 90% | 2733 fps | 96.9% |
| Hodgdon LEVERevolution | <<locked>> | 92% | 42,772 psi | 87% | 2749 fps | 96.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 33,417 psi | 68% | 1716 fps | 100% |
| Hodgdon VARGET | <<locked>> | 90% | 43,323 psi | 88% | 2694 fps | 96.4% |
| IMR 3031 | <<locked>> | 90% | 42,917 psi | 87% | 2746 fps | 99.9% |
| IMR 4198 | <<locked>> | 82% | 43,845 psi | 89% | 2625 fps | 100% |
| IMR 4895 | <<locked>> | 92% | 42,699 psi | 87% | 2726 fps | 95.9% |
| IMR 8208 XBR | <<locked>> | 88% | 43,918 psi | 89% | 2690 fps | 97.4% |
| Lovex D073.5 | <<locked>> | 84% | 42,946 psi | 87% | 2671 fps | 98.1% |
| Lovex D073.6 | <<locked>> | 90% | 41,916 psi | 85% | 2700 fps | 98.6% |
| Lovex S060 | <<locked>> | 88% | 42,757 psi | 87% | 2621 fps | 95.8% |
| Lovex S062 | <<locked>> | 94% | 43,656 psi | 89% | 2703 fps | 97.5% |
| Norma 201 | <<locked>> | 90% | 42,888 psi | 87% | 2674 fps | 97.3% |
| Norma 202 | <<locked>> | 90% | 43,105 psi | 87% | 2697 fps | 99.2% |
| Norma 203B | <<locked>> | 94% | 43,671 psi | 89% | 2736 fps | 96.1% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 33,591 psi | 68% | 1755 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 84% | 43,642 psi | 89% | 2684 fps | 98.5% |
| ReloadSwiss RS 60 | <<locked>> | 98% | 44,092 psi | 89% | 2828 fps | 98.7% |
| Rottweil R 901 | <<locked>> | 88% | 44,063 psi | 89% | 2680 fps | 99.1% |
| Rottweil R 902 | <<locked>> | 92% | 43,279 psi | 88% | 2674 fps | 97.3% |
| Rottweil R 903 | <<locked>> | 98% | 42,670 psi | 87% | 2720 fps | 96.6% |
| Shooters World Match Rifle | <<locked>> | 90% | 41,916 psi | 85% | 2700 fps | 98.6% |
| Shooters World Precision | <<locked>> | 94% | 43,656 psi | 89% | 2703 fps | 97.5% |
| Shooters World Tactical Rifle | <<locked>> | 82% | 43,627 psi | 88% | 2648 fps | 96.9% |
| SNPE Vectan SP 3 | <<locked>> | 82% | 43,366 psi | 88% | 2657 fps | 99.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 88% | 42,844 psi | 87% | 2605 fps | 99.1% |
| SNPE Vectan Tubal 5000 | <<locked>> | 94% | 41,974 psi | 85% | 2602 fps | 99.6% |
| Somchem S321 | <<locked>> | 86% | 44,309 psi | 90% | 2720 fps | 97.8% |
| Somchem S335 | <<locked>> | 90% | 44,411 psi | 90% | 2651 fps | 99.7% |
| Somchem S341 | <<locked>> | 90% | 44,483 psi | 90% | 2710 fps | 96% |
| Somchem S355 | <<locked>> | 98% | 43,990 psi | 89% | 2730 fps | 96.7% |
| Vihtavuori N130 | <<locked>> | 84% | 42,902 psi | 87% | 2598 fps | 100% |
| Vihtavuori N133 | <<locked>> | 88% | 42,699 psi | 87% | 2608 fps | 100% |
| Vihtavuori N135 | <<locked>> | 94% | 44,512 psi | 90% | 2717 fps | 100% |
| Vihtavuori N140 | <<locked>> | 92% | 43,671 psi | 89% | 2680 fps | 99.5% |
| Vihtavuori N150 | <<locked>> | 98% | 42,395 psi | 86% | 2671 fps | 97.6% |
| Vihtavuori N530 | <<locked>> | 88% | 43,961 psi | 89% | 2687 fps | 97.5% |
| Vihtavuori N540 | <<locked>> | 92% | 41,945 psi | 85% | 2664 fps | 98.9% |
| Winchester 748 | <<locked>> | 88% | 42,627 psi | 86% | 2726 fps | 98% |
| Winchester StaBALL Match | <<locked>> | 92% | 44,585 psi | 90% | 2743 fps | 96.9% |
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% | 34,650 psi | 70% | 2477 fps | 99.4% |
| Accurate 2460 | <<locked>> | 80% | 37,420 psi | 76% | 2559 fps | 97.9% |
| Accurate 2495 | <<locked>> | 80% | 26,861 psi | 54% | 2349 fps | 97.8% |
| Accurate 2520 | <<locked>> | 80% | 32,880 psi | 67% | 2493 fps | 96.2% |
| Accurate 4064 | <<locked>> | 82% | 27,325 psi | 55% | 2372 fps | 95.2% |
| ADI AR 2206H | <<locked>> | 88% | 41,437 psi | 84% | 2667 fps | 95.4% |
| ADI Benchmark 8208 | <<locked>> | 82% | 36,158 psi | 73% | 2530 fps | 95.2% |
| Alliant AR-Comp | <<locked>> | 80% | 32,024 psi | 65% | 2500 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 38,595 psi | 78% | 2661 fps | 95.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 92% | 38,218 psi | 78% | 2628 fps | 95.6% |
| Alliant Reloder-10x | <<locked>> | 80% | 39,987 psi | 81% | 2595 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 98% | 41,176 psi | 84% | 2746 fps | 95.3% |
| Bofors RP3 | <<locked>> | 92% | 37,478 psi | 76% | 2625 fps | 95.4% |
| Hodgdon Benchmark | <<locked>> | 80% | 36,332 psi | 74% | 2490 fps | 95.9% |
| Hodgdon BL-C2 | <<locked>> | 82% | 33,765 psi | 68% | 2530 fps | 95.1% |
| Hodgdon H322 | <<locked>> | 80% | 38,595 psi | 78% | 2605 fps | 99.1% |
| Hodgdon H335 | <<locked>> | 80% | 39,044 psi | 79% | 2615 fps | 98.5% |
| Hodgdon H4895 | <<locked>> | 86% | 39,015 psi | 79% | 2625 fps | 95.3% |
| Hodgdon LEVERevolution | 50.3 gr | 88% | 37,405 psi | 76% | 2635 fps | 95.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 24,598 psi | 50% | 1529 fps | 100% |
| Hodgdon VARGET | <<locked>> | 88% | 40,596 psi | 82% | 2638 fps | 95.7% |
| IMR 3031 | <<locked>> | 80% | 30,647 psi | 62% | 2477 fps | 98% |
| IMR 4198 | <<locked>> | 80% | 41,220 psi | 84% | 2579 fps | 100% |
| IMR 4895 | <<locked>> | 90% | 39,943 psi | 81% | 2674 fps | 95.1% |
| IMR 8208 XBR | <<locked>> | 82% | 36,158 psi | 73% | 2530 fps | 95.2% |
| Lovex D073.5 | <<locked>> | 80% | 37,173 psi | 75% | 2556 fps | 96.7% |
| Lovex D073.6 | <<locked>> | 82% | 31,676 psi | 64% | 2477 fps | 95.7% |
| Lovex S060 | <<locked>> | 86% | 40,364 psi | 82% | 2572 fps | 95% |
| Lovex S062 | <<locked>> | 88% | 36,056 psi | 73% | 2546 fps | 95.3% |
| Norma 201 | <<locked>> | 84% | 35,418 psi | 72% | 2516 fps | 95.1% |
| Norma 202 | <<locked>> | 80% | 31,067 psi | 63% | 2431 fps | 96.2% |
| Norma 203B | <<locked>> | 92% | 40,886 psi | 83% | 2684 fps | 95.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 24,656 psi | 50% | 1568 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 38,247 psi | 78% | 2575 fps | 97.4% |
| ReloadSwiss RS 60 | 51.6 gr | 90% | 33,765 psi | 68% | 2579 fps | 95% |
| Rottweil R 901 | <<locked>> | 80% | 34,592 psi | 70% | 2484 fps | 97.1% |
| Rottweil R 902 | <<locked>> | 86% | 35,766 psi | 73% | 2516 fps | 95.2% |
| Rottweil R 903 | <<locked>> | 94% | 37,173 psi | 75% | 2608 fps | 95% |
| Shooters World Match Rifle | <<locked>> | 82% | 31,676 psi | 64% | 2477 fps | 95.7% |
| Shooters World Precision | <<locked>> | 88% | 36,056 psi | 73% | 2546 fps | 95.3% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 40,611 psi | 82% | 2589 fps | 96.2% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 40,741 psi | 83% | 2612 fps | 99.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 33,315 psi | 68% | 2408 fps | 96.9% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 26,890 psi | 55% | 2264 fps | 95.6% |
| Somchem S321 | <<locked>> | 80% | 36,056 psi | 73% | 2549 fps | 95.6% |
| Somchem S335 | <<locked>> | 80% | 32,561 psi | 66% | 2408 fps | 97.6% |
| Somchem S341 | <<locked>> | 88% | 41,408 psi | 84% | 2651 fps | 95.2% |
| Somchem S355 | <<locked>> | 94% | 38,769 psi | 79% | 2625 fps | 95.2% |
| Vihtavuori N130 | <<locked>> | 80% | 38,014 psi | 77% | 2507 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 33,272 psi | 67% | 2421 fps | 99.1% |
| Vihtavuori N135 | <<locked>> | 80% | 28,123 psi | 57% | 2372 fps | 98.1% |
| Vihtavuori N140 | <<locked>> | 80% | 29,414 psi | 60% | 2372 fps | 96% |
| Vihtavuori N150 | <<locked>> | 92% | 34,809 psi | 71% | 2516 fps | 95.5% |
| Vihtavuori N530 | <<locked>> | 82% | 35,955 psi | 73% | 2523 fps | 95.2% |
| Vihtavuori N540 | <<locked>> | 82% | 30,066 psi | 61% | 2402 fps | 95.6% |
| Winchester 748 | 46.9 gr | 82% | 34,548 psi | 70% | 2552 fps | 95.7% |
| Winchester StaBALL Match | <<locked>> | 88% | 38,957 psi | 79% | 2635 fps | 95.3% |
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 57 powders for 8 x 56 R M 89 Port. Krop. loaded with the .323 | 160gr | Fox Classic Hunter. ReloadSwiss RS 60 delivers the highest muzzle velocity at 2,828 fps; across all powders the maximum-charge window runs from 1,716 fps to 2,828 fps. Alliant Reloder-17 gives the best case fill at 100 %, and 57 of the 57 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (340 MPa), the top charges use 68–90 %, leaving at least 10 % headroom. The 160.0 gr projectile in 0.323" calls for a 1:13.0 twist; slower twists will usually not stabilise this weight. Alliant Reloder-17, 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, Hodgdon LEVERevolution, Winchester 748 rank at the top here: for 8 x 56 R M 89 Port. Krop. with the .323 | 160gr | 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.