Load Specifications
Load data in caliber 8 x 56 R M 89 Port. Krop. with .323 | 162gr | MEN SF 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, 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% | 44,092 psi | 89% | 2657 fps | 100% |
| Accurate 2495 | <<locked>> | 90% | 43,714 psi | 89% | 2707 fps | 100% |
| Accurate 2520 | <<locked>> | 84% | 42,917 psi | 87% | 2707 fps | 99.1% |
| Accurate 4064 | <<locked>> | 92% | 43,526 psi | 88% | 2733 fps | 99.7% |
| ADI AR 2206H | <<locked>> | 86% | 43,178 psi | 88% | 2707 fps | 96.5% |
| ADI AR 2208 | <<locked>> | 92% | 44,106 psi | 89% | 2703 fps | 95.9% |
| ADI Benchmark 8208 | <<locked>> | 84% | 42,656 psi | 87% | 2671 fps | 97.7% |
| Alliant AR-Comp | <<locked>> | 86% | 44,077 psi | 89% | 2726 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 92% | 42,902 psi | 87% | 2723 fps | 97.5% |
| Alliant Reloder-15 | <<locked>> | 90% | 43,656 psi | 89% | 2736 fps | 96.1% |
| Alliant Reloder-17 | <<locked>> | 96% | 42,844 psi | 87% | 2799 fps | 96.7% |
| Bofors RP3 | <<locked>> | 92% | 42,366 psi | 86% | 2723 fps | 97.4% |
| Hodgdon Benchmark | <<locked>> | 82% | 42,264 psi | 86% | 2621 fps | 98.1% |
| Hodgdon BL-C2 | <<locked>> | 86% | 43,424 psi | 88% | 2736 fps | 98.4% |
| Hodgdon H4895 | <<locked>> | 86% | 43,453 psi | 88% | 2720 fps | 97.2% |
| Hodgdon LEVERevolution | <<locked>> | 90% | 44,338 psi | 90% | 2789 fps | 97.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,185 psi | 69% | 1739 fps | 100% |
| Hodgdon VARGET | <<locked>> | 86% | 41,887 psi | 85% | 2671 fps | 96.7% |
| IMR 3031 | <<locked>> | 86% | 42,076 psi | 85% | 2726 fps | 100% |
| IMR 4064 | <<locked>> | 90% | 43,584 psi | 88% | 2687 fps | 96.1% |
| IMR 4895 | <<locked>> | 88% | 41,800 psi | 85% | 2713 fps | 96.3% |
| IMR 8208 XBR | <<locked>> | 84% | 42,656 psi | 87% | 2671 fps | 97.7% |
| Lovex D073.6 | <<locked>> | 88% | 44,222 psi | 90% | 2740 fps | 99.3% |
| Lovex S060 | <<locked>> | 86% | 44,005 psi | 89% | 2651 fps | 96.7% |
| Lovex S062 | <<locked>> | 90% | 43,018 psi | 87% | 2694 fps | 97.9% |
| Norma 201 | <<locked>> | 86% | 42,221 psi | 86% | 2661 fps | 97.6% |
| Norma 202 | <<locked>> | 86% | 42,351 psi | 86% | 2680 fps | 99.4% |
| Norma 203B | <<locked>> | 90% | 42,859 psi | 87% | 2723 fps | 96.5% |
| Ramshot Big Game | <<locked>> | 90% | 42,670 psi | 87% | 2736 fps | 96.1% |
| Ramshot Wild Boar | <<locked>> | 86% | 44,599 psi | 90% | 2740 fps | 96.8% |
| Ramshot X-Terminator | <<locked>> | 82% | 43,700 psi | 89% | 2667 fps | 96.4% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 34,476 psi | 70% | 1781 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 94% | 42,902 psi | 87% | 2815 fps | 99% |
| Rottweil R 901 | <<locked>> | 84% | 43,598 psi | 88% | 2671 fps | 99.4% |
| Rottweil R 902 | <<locked>> | 88% | 42,598 psi | 86% | 2661 fps | 97.7% |
| Rottweil R 903 | <<locked>> | 94% | 42,264 psi | 86% | 2713 fps | 97.1% |
| Shooters World Match Rifle | <<locked>> | 88% | 44,222 psi | 90% | 2740 fps | 99.3% |
| Shooters World Precision | <<locked>> | 90% | 43,018 psi | 87% | 2694 fps | 97.9% |
| SNPE Vectan SP 11 | <<locked>> | 94% | 44,121 psi | 89% | 2772 fps | 96.6% |
| SNPE Vectan SP 9 | <<locked>> | 88% | 44,353 psi | 90% | 2726 fps | 96.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 44,135 psi | 90% | 2631 fps | 99.5% |
| SNPE Vectan Tubal 5000 | <<locked>> | 92% | 43,497 psi | 88% | 2628 fps | 99.9% |
| Somchem S321 | <<locked>> | 82% | 43,018 psi | 87% | 2697 fps | 98% |
| Somchem S335 | <<locked>> | 86% | 43,511 psi | 88% | 2635 fps | 99.8% |
| Somchem S341 | <<locked>> | 86% | 43,091 psi | 87% | 2687 fps | 96.3% |
| Somchem S355 | <<locked>> | 94% | 43,366 psi | 88% | 2720 fps | 97.1% |
| Somchem S365ᴾ | <<locked>> | 100% | 37,637 psi | 76% | 2690 fps | 96.8% |
| Vihtavuori N130 | <<locked>> | 82% | 44,208 psi | 90% | 2618 fps | 100% |
| Vihtavuori N133 | <<locked>> | 86% | 44,063 psi | 89% | 2631 fps | 100% |
| Vihtavuori N135 | <<locked>> | 90% | 43,816 psi | 89% | 2700 fps | 100% |
| Vihtavuori N140 | <<locked>> | 88% | 42,656 psi | 87% | 2664 fps | 99.6% |
| Vihtavuori N150 | <<locked>> | 96% | 44,512 psi | 90% | 2713 fps | 98.5% |
| Vihtavuori N530 | <<locked>> | 84% | 42,598 psi | 86% | 2664 fps | 97.7% |
| Vihtavuori N540 | <<locked>> | 90% | 43,656 psi | 89% | 2697 fps | 99.5% |
| Winchester 6.5 StaBALL | <<locked>> | 98% | 43,279 psi | 88% | 2690 fps | 96.9% |
| Winchester 748 | <<locked>> | 86% | 44,280 psi | 90% | 2759 fps | 98.8% |
| Winchester StaBALL Match | <<locked>> | 88% | 43,526 psi | 88% | 2730 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% | 38,711 psi | 79% | 2559 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 31,357 psi | 64% | 2454 fps | 99.3% |
| Accurate 2520 | <<locked>> | 80% | 37,304 psi | 76% | 2592 fps | 98% |
| Accurate 4064 | <<locked>> | 80% | 29,675 psi | 60% | 2428 fps | 96.8% |
| ADI AR 2206H | <<locked>> | 84% | 40,451 psi | 82% | 2651 fps | 95.8% |
| ADI AR 2208 | <<locked>> | 90% | 41,539 psi | 84% | 2651 fps | 95.2% |
| ADI Benchmark 8208 | <<locked>> | 80% | 37,637 psi | 76% | 2566 fps | 96.3% |
| Alliant AR-Comp | <<locked>> | 80% | 36,187 psi | 73% | 2585 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 35,462 psi | 72% | 2566 fps | 95.3% |
| Alliant Reloder-15 | <<locked>> | 88% | 40,901 psi | 83% | 2680 fps | 95.3% |
| Alliant Reloder-17 | 57.4 gr | 94% | 40,147 psi | 81% | 2736 fps | 95.9% |
| Bofors RP3 | <<locked>> | 86% | 34,679 psi | 70% | 2559 fps | 95.1% |
| Hodgdon Benchmark | <<locked>> | 80% | 39,885 psi | 81% | 2572 fps | 97.6% |
| Hodgdon BL-C2 | <<locked>> | 80% | 35,375 psi | 72% | 2566 fps | 96.3% |
| Hodgdon H4895 | <<locked>> | 82% | 38,130 psi | 77% | 2608 fps | 95.7% |
| Hodgdon LEVERevolution | 51.1 gr | 84% | 36,477 psi | 74% | 2618 fps | 95.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,382 psi | 51% | 1555 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 36,912 psi | 75% | 2562 fps | 95.2% |
| IMR 3031 | <<locked>> | 80% | 34,447 psi | 70% | 2569 fps | 99.3% |
| IMR 4064 | <<locked>> | 88% | 40,814 psi | 83% | 2631 fps | 95.3% |
| IMR 4895 | <<locked>> | 86% | 39,349 psi | 80% | 2661 fps | 95.6% |
| IMR 8208 XBR | <<locked>> | 80% | 37,637 psi | 76% | 2566 fps | 96.3% |
| Lovex D073.6 | <<locked>> | 80% | 33,649 psi | 68% | 2520 fps | 97% |
| Lovex S060 | <<locked>> | 82% | 38,870 psi | 79% | 2546 fps | 95.3% |
| Lovex S062 | <<locked>> | 82% | 33,402 psi | 68% | 2480 fps | 95% |
| Norma 201 | <<locked>> | 80% | 35,056 psi | 71% | 2507 fps | 95.6% |
| Norma 202 | <<locked>> | 80% | 34,838 psi | 71% | 2523 fps | 98% |
| Norma 203B | <<locked>> | 86% | 37,782 psi | 77% | 2618 fps | 95% |
| Ramshot Big Game | <<locked>> | 88% | 40,016 psi | 81% | 2680 fps | 95.3% |
| Ramshot Wild Boar | <<locked>> | 82% | 38,943 psi | 79% | 2625 fps | 95.2% |
| Ramshot X-Terminator | <<locked>> | 80% | 40,814 psi | 83% | 2608 fps | 95.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 25,527 psi | 52% | 1591 fps | 100% |
| ReloadSwiss RS 60 | 52.5 gr | 86% | 33,011 psi | 67% | 2569 fps | 95.6% |
| Rottweil R 901 | <<locked>> | 80% | 38,508 psi | 78% | 2566 fps | 98.6% |
| Rottweil R 902 | <<locked>> | 82% | 35,317 psi | 72% | 2507 fps | 95.6% |
| Rottweil R 903 | <<locked>> | 90% | 37,043 psi | 75% | 2605 fps | 95.6% |
| Shooters World Match Rifle | <<locked>> | 80% | 33,649 psi | 68% | 2520 fps | 97% |
| Shooters World Precision | <<locked>> | 82% | 33,402 psi | 68% | 2480 fps | 95% |
| SNPE Vectan SP 11 | <<locked>> | 90% | 38,812 psi | 79% | 2661 fps | 95% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 38,986 psi | 79% | 2615 fps | 95.2% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 36,608 psi | 74% | 2484 fps | 98.4% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 29,892 psi | 61% | 2343 fps | 97.5% |
| Somchem S321 | <<locked>> | 80% | 40,132 psi | 81% | 2641 fps | 97.4% |
| Somchem S335 | <<locked>> | 80% | 36,260 psi | 74% | 2490 fps | 98.9% |
| Somchem S341 | <<locked>> | 84% | 40,089 psi | 81% | 2628 fps | 95.5% |
| Somchem S355 | <<locked>> | 90% | 38,435 psi | 78% | 2618 fps | 95.7% |
| Somchem S365 | <<locked>> | 98% | 35,244 psi | 71% | 2631 fps | 95.9% |
| Vihtavuori N130 | <<locked>> | 80% | 41,611 psi | 84% | 2575 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 36,622 psi | 74% | 2493 fps | 99.8% |
| Vihtavuori N135 | <<locked>> | 80% | 31,792 psi | 64% | 2457 fps | 99.3% |
| Vihtavuori N140 | <<locked>> | 80% | 32,996 psi | 67% | 2461 fps | 97.8% |
| Vihtavuori N150 | <<locked>> | 86% | 32,097 psi | 65% | 2451 fps | 95.1% |
| Vihtavuori N530 | <<locked>> | 80% | 37,434 psi | 76% | 2559 fps | 96.4% |
| Vihtavuori N540 | <<locked>> | 80% | 31,647 psi | 64% | 2441 fps | 96.8% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 37,985 psi | 77% | 2579 fps | 95.2% |
| Winchester 748 | <<locked>> | 80% | 36,245 psi | 74% | 2592 fps | 96.9% |
| Winchester StaBALL Match | <<locked>> | 84% | 38,130 psi | 77% | 2618 fps | 95.7% |
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 | 162gr | MEN SF. ReloadSwiss RS 60 delivers the highest muzzle velocity at 2,815 fps; across all powders the maximum-charge window runs from 1,739 fps to 2,815 fps. Hodgdon TrailBoss 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 69–90 %, leaving at least 10 % headroom. The 162.0 gr projectile in 0.323" calls for a 1:6.0 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 | 162gr | MEN SF 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.