Load Specifications
Load data in caliber 8 x 56 R M 89 Port. Krop. with .323 | 180gr | Nosler Expansion Tip bullet and 66 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 Ramshot Big Game.
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% | 44,309 psi | 90% | 2493 fps | 100% |
| Accurate 2460 | <<locked>> | 82% | 42,322 psi | 86% | 2493 fps | 99.5% |
| Accurate 2495 | <<locked>> | 92% | 43,062 psi | 87% | 2533 fps | 100% |
| Accurate 2520 | <<locked>> | 86% | 42,917 psi | 87% | 2539 fps | 99.4% |
| Accurate 4064 | <<locked>> | 94% | 42,989 psi | 87% | 2562 fps | 99.8% |
| ADI AR 2206H | <<locked>> | 88% | 43,569 psi | 88% | 2549 fps | 97.1% |
| ADI AR 2208 | <<locked>> | 94% | 44,382 psi | 90% | 2539 fps | 96.4% |
| ADI Benchmark 8208 | <<locked>> | 86% | 43,120 psi | 87% | 2513 fps | 98.1% |
| Alliant AR-Comp | <<locked>> | 88% | 44,585 psi | 90% | 2566 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 82% | 43,511 psi | 88% | 2595 fps | 97.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 94% | 43,033 psi | 87% | 2559 fps | 97.9% |
| Alliant Reloder-10x | <<locked>> | 82% | 44,483 psi | 90% | 2503 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 92% | 43,772 psi | 89% | 2572 fps | 96.6% |
| Alliant Reloder-17 | <<locked>> | 98% | 43,047 psi | 87% | 2635 fps | 97.2% |
| Bofors RP3 | <<locked>> | 94% | 42,351 psi | 86% | 2562 fps | 97.9% |
| Hodgdon Benchmark | <<locked>> | 84% | 42,844 psi | 87% | 2467 fps | 98.5% |
| Hodgdon BL-C2 | <<locked>> | 88% | 43,685 psi | 89% | 2575 fps | 98.8% |
| Hodgdon CFE223 | <<locked>> | 84% | 42,206 psi | 86% | 2595 fps | 96.1% |
| Hodgdon H322 | <<locked>> | 82% | 43,381 psi | 88% | 2526 fps | 100% |
| Hodgdon H335 | <<locked>> | 82% | 44,106 psi | 89% | 2546 fps | 99.7% |
| Hodgdon H4895 | <<locked>> | 88% | 43,845 psi | 89% | 2559 fps | 97.7% |
| Hodgdon LEVERevolution | <<locked>> | 90% | 41,930 psi | 85% | 2575 fps | 97.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 33,779 psi | 69% | 1598 fps | 100% |
| Hodgdon VARGET | <<locked>> | 88% | 42,380 psi | 86% | 2513 fps | 97.3% |
| IMR 3031 | <<locked>> | 88% | 42,235 psi | 86% | 2562 fps | 100% |
| IMR 4064 | <<locked>> | 92% | 43,816 psi | 89% | 2526 fps | 96.6% |
| IMR 4895 | <<locked>> | 90% | 42,090 psi | 85% | 2556 fps | 96.8% |
| IMR 8208 XBR | <<locked>> | 86% | 43,120 psi | 87% | 2513 fps | 98.1% |
| Lovex D073.5 | <<locked>> | 82% | 41,945 psi | 85% | 2493 fps | 98.7% |
| Lovex D073.6 | <<locked>> | 90% | 44,237 psi | 90% | 2575 fps | 99.5% |
| Lovex S060 | <<locked>> | 88% | 44,556 psi | 90% | 2493 fps | 97.3% |
| Lovex S062 | <<locked>> | 92% | 42,946 psi | 87% | 2526 fps | 98.2% |
| Norma 201 | <<locked>> | 88% | 42,409 psi | 86% | 2503 fps | 98.1% |
| Norma 202 | <<locked>> | 88% | 42,467 psi | 86% | 2516 fps | 99.6% |
| Norma 203B | <<locked>> | 92% | 42,960 psi | 87% | 2562 fps | 97% |
| Ramshot Big Game | <<locked>> | 92% | 43,134 psi | 87% | 2579 fps | 96.7% |
| Ramshot Wild Boar | <<locked>> | 86% | 42,148 psi | 85% | 2530 fps | 96.6% |
| Ramshot X-Terminator | <<locked>> | 84% | 44,164 psi | 90% | 2510 fps | 97% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 34,084 psi | 69% | 1640 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 42,859 psi | 87% | 2507 fps | 99.1% |
| ReloadSwiss RS 52 | <<locked>> | 90% | 42,786 psi | 87% | 2618 fps | 96.3% |
| ReloadSwiss RS 60 | <<locked>> | 96% | 43,337 psi | 88% | 2654 fps | 99.3% |
| Rottweil R 901 | <<locked>> | 86% | 43,497 psi | 88% | 2503 fps | 99.6% |
| Rottweil R 902 | <<locked>> | 90% | 42,583 psi | 86% | 2497 fps | 98.1% |
| Rottweil R 903 | <<locked>> | 96% | 42,250 psi | 86% | 2552 fps | 97.5% |
| Shooters World Match Rifle | <<locked>> | 90% | 44,237 psi | 90% | 2575 fps | 99.5% |
| Shooters World Precision | <<locked>> | 92% | 42,946 psi | 87% | 2526 fps | 98.2% |
| SNPE Vectan SP 11 | <<locked>> | 96% | 44,309 psi | 90% | 2608 fps | 97.1% |
| SNPE Vectan SP 9 | <<locked>> | 88% | 41,829 psi | 85% | 2513 fps | 96.6% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 42,061 psi | 85% | 2428 fps | 99.5% |
| SNPE Vectan Tubal 5000 | <<locked>> | 94% | 43,976 psi | 89% | 2474 fps | 100% |
| Somchem S321 | <<locked>> | 84% | 43,395 psi | 88% | 2539 fps | 98.5% |
| Somchem S335 | <<locked>> | 88% | 43,874 psi | 89% | 2477 fps | 99.9% |
| Somchem S341 | <<locked>> | 88% | 43,352 psi | 88% | 2530 fps | 96.8% |
| Somchem S355 | <<locked>> | 96% | 43,352 psi | 88% | 2559 fps | 97.5% |
| Somchem S365ᴾ | <<locked>> | 100% | 35,143 psi | 71% | 2474 fps | 96.4% |
| Vihtavuori N130 | <<locked>> | 82% | 42,134 psi | 85% | 2418 fps | 100% |
| Vihtavuori N133 | <<locked>> | 86% | 42,061 psi | 85% | 2431 fps | 100% |
| Vihtavuori N135 | <<locked>> | 92% | 43,932 psi | 89% | 2536 fps | 100% |
| Vihtavuori N140 | <<locked>> | 90% | 42,902 psi | 87% | 2503 fps | 99.8% |
| Vihtavuori N150 | <<locked>> | 96% | 41,843 psi | 85% | 2503 fps | 98.4% |
| Vihtavuori N530 | <<locked>> | 86% | 43,163 psi | 88% | 2510 fps | 98.2% |
| Vihtavuori N540 | <<locked>> | 92% | 44,077 psi | 89% | 2543 fps | 99.7% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 43,555 psi | 88% | 2533 fps | 97.3% |
| Winchester 748 | <<locked>> | 86% | 41,771 psi | 85% | 2546 fps | 98.7% |
| Winchester StaBALL Match | <<locked>> | 90% | 43,816 psi | 89% | 2569 fps | 97.7% |
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% | 36,550 psi | 74% | 2359 fps | 99.9% |
| Accurate 2460 | <<locked>> | 80% | 39,508 psi | 80% | 2444 fps | 99.1% |
| Accurate 2495 | <<locked>> | 80% | 28,558 psi | 58% | 2247 fps | 99.1% |
| Accurate 2520 | <<locked>> | 80% | 34,925 psi | 71% | 2388 fps | 97.9% |
| Accurate 4064 | <<locked>> | 80% | 27,108 psi | 55% | 2221 fps | 96.4% |
| ADI AR 2206H | <<locked>> | 84% | 38,276 psi | 78% | 2444 fps | 95.6% |
| ADI AR 2208 | <<locked>> | 90% | 39,218 psi | 80% | 2444 fps | 95% |
| ADI Benchmark 8208 | <<locked>> | 80% | 35,621 psi | 72% | 2365 fps | 96.2% |
| Alliant AR-Comp | <<locked>> | 80% | 33,779 psi | 69% | 2379 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 40,814 psi | 83% | 2543 fps | 97.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 33,156 psi | 67% | 2362 fps | 95% |
| Alliant Reloder-10x | <<locked>> | 80% | 41,713 psi | 85% | 2457 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 88% | 38,638 psi | 78% | 2474 fps | 95.1% |
| Alliant Reloder-17 | 51.3 gr | 94% | 37,855 psi | 77% | 2523 fps | 95.5% |
| Bofors RP3 | <<locked>> | 88% | 34,563 psi | 70% | 2408 fps | 95.7% |
| Hodgdon Benchmark | <<locked>> | 80% | 37,956 psi | 77% | 2372 fps | 97.5% |
| Hodgdon BL-C2 | <<locked>> | 80% | 33,112 psi | 67% | 2365 fps | 96.1% |
| Hodgdon CFE223 | <<locked>> | 82% | 39,436 psi | 80% | 2539 fps | 95.2% |
| Hodgdon H322 | <<locked>> | 80% | 40,393 psi | 82% | 2474 fps | 99.8% |
| Hodgdon H335 | <<locked>> | 80% | 40,959 psi | 83% | 2493 fps | 99.4% |
| Hodgdon H4895 | <<locked>> | 82% | 35,926 psi | 73% | 2402 fps | 95.5% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 34,258 psi | 69% | 2411 fps | 95.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 24,947 psi | 51% | 1427 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 34,925 psi | 71% | 2362 fps | 95% |
| IMR 3031 | <<locked>> | 80% | 32,329 psi | 66% | 2365 fps | 99.2% |
| IMR 4064 | <<locked>> | 88% | 38,653 psi | 78% | 2428 fps | 95.1% |
| IMR 4895 | <<locked>> | 86% | 36,883 psi | 75% | 2451 fps | 95.3% |
| IMR 8208 XBR | <<locked>> | 80% | 35,621 psi | 72% | 2365 fps | 96.2% |
| Lovex D073.5 | <<locked>> | 80% | 39,131 psi | 79% | 2441 fps | 98.1% |
| Lovex D073.6 | <<locked>> | 80% | 31,328 psi | 64% | 2320 fps | 96.7% |
| Lovex S060 | <<locked>> | 82% | 37,144 psi | 75% | 2352 fps | 95.2% |
| Lovex S062 | <<locked>> | 84% | 33,431 psi | 68% | 2336 fps | 95.6% |
| Norma 201 | <<locked>> | 80% | 32,793 psi | 67% | 2303 fps | 95.3% |
| Norma 202 | <<locked>> | 80% | 32,706 psi | 66% | 2323 fps | 97.8% |
| Norma 203B | <<locked>> | 88% | 37,884 psi | 77% | 2464 fps | 95.6% |
| Ramshot Big Game | 49.8 gr | 90% | 40,132 psi | 81% | 2523 fps | 95.8% |
| Ramshot Wild Boar | <<locked>> | 82% | 36,811 psi | 75% | 2425 fps | 95% |
| Ramshot X-Terminator | <<locked>> | 80% | 38,740 psi | 79% | 2408 fps | 95.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 25,092 psi | 51% | 1463 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 40,030 psi | 81% | 2454 fps | 98.6% |
| ReloadSwiss RS 52 | <<locked>> | 88% | 39,856 psi | 81% | 2559 fps | 95.4% |
| ReloadSwiss RS 60 | 46.9 gr | 86% | 31,067 psi | 63% | 2365 fps | 95.3% |
| Rottweil R 901 | <<locked>> | 80% | 36,129 psi | 73% | 2362 fps | 98.4% |
| Rottweil R 902 | <<locked>> | 82% | 33,141 psi | 67% | 2306 fps | 95.4% |
| Rottweil R 903 | <<locked>> | 90% | 34,505 psi | 70% | 2398 fps | 95.3% |
| Shooters World Match Rifle | <<locked>> | 80% | 31,328 psi | 64% | 2320 fps | 96.7% |
| Shooters World Precision | <<locked>> | 84% | 33,431 psi | 68% | 2336 fps | 95.6% |
| SNPE Vectan SP 11 | <<locked>> | 92% | 39,030 psi | 79% | 2507 fps | 95.6% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 36,796 psi | 75% | 2411 fps | 95% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 34,708 psi | 70% | 2290 fps | 98.3% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 28,094 psi | 57% | 2156 fps | 97.3% |
| Somchem S321 | <<locked>> | 80% | 37,913 psi | 77% | 2438 fps | 97.2% |
| Somchem S335 | <<locked>> | 80% | 34,127 psi | 69% | 2293 fps | 98.8% |
| Somchem S341 | <<locked>> | 84% | 37,840 psi | 77% | 2425 fps | 95.3% |
| Somchem S355 | <<locked>> | 90% | 35,911 psi | 73% | 2411 fps | 95.5% |
| Somchem S365 | <<locked>> | 98% | 33,054 psi | 67% | 2425 fps | 95.5% |
| Vihtavuori N130 | <<locked>> | 80% | 39,566 psi | 80% | 2375 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 34,722 psi | 70% | 2297 fps | 99.8% |
| Vihtavuori N135 | <<locked>> | 80% | 29,646 psi | 60% | 2260 fps | 99.2% |
| Vihtavuori N140 | <<locked>> | 80% | 30,806 psi | 62% | 2264 fps | 97.6% |
| Vihtavuori N150 | <<locked>> | 88% | 32,126 psi | 65% | 2310 fps | 95.7% |
| Vihtavuori N530 | <<locked>> | 80% | 35,201 psi | 71% | 2352 fps | 96.2% |
| Vihtavuori N540 | <<locked>> | 80% | 29,646 psi | 60% | 2247 fps | 96.6% |
| Winchester 6.5 StaBALL | <<locked>> | 96% | 38,203 psi | 77% | 2431 fps | 95.7% |
| Winchester 748 | <<locked>> | 80% | 33,910 psi | 69% | 2385 fps | 96.7% |
| Winchester StaBALL Match | <<locked>> | 84% | 35,650 psi | 72% | 2408 fps | 95.4% |
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 66 powders for 8 x 56 R M 89 Port. Krop. loaded with the .323 | 180gr | Nosler Expansion Tip. ReloadSwiss RS 60 delivers the highest muzzle velocity at 2,654 fps; across all powders the maximum-charge window runs from 1,598 fps to 2,654 fps. Hodgdon TrailBoss gives the best case fill at 100 %, and 66 of the 66 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, Ramshot Big Game rank at the top here: for 8 x 56 R M 89 Port. Krop. with the .323 | 180gr | Nosler Expansion Tip 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.