Load Specifications
Load data in caliber 8 x 56 R M 89 Port. Krop. with .323 | 220gr | Woodleigh PP SN bullet and 59 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 70 and Alliant Reloder-17.
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 2495 | <<locked>> | 84% | 43,555 psi | 88% | 2283 fps | 100% |
| Accurate 4064 | <<locked>> | 86% | 43,874 psi | 89% | 2323 fps | 100% |
| Accurate 4350 | <<locked>> | 94% | 42,250 psi | 86% | 2369 fps | 98.1% |
| ADI AR 2208 | <<locked>> | 86% | 42,989 psi | 87% | 2297 fps | 98.5% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 43,294 psi | 88% | 2418 fps | 98.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 42,438 psi | 86% | 2316 fps | 99.5% |
| Alliant Reloder-15 | <<locked>> | 84% | 42,946 psi | 87% | 2329 fps | 98.7% |
| Alliant Reloder-16 | <<locked>> | 94% | 41,959 psi | 85% | 2375 fps | 98.2% |
| Alliant Reloder-17 | <<locked>> | 90% | 42,061 psi | 85% | 2405 fps | 99.4% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 35,810 psi | 73% | 2283 fps | 98% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 39,479 psi | 80% | 2411 fps | 96.8% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 43,859 psi | 89% | 2346 fps | 98.4% |
| Bofors RP3 | <<locked>> | 86% | 42,293 psi | 86% | 2326 fps | 99.6% |
| Hodgdon H380 | <<locked>> | 86% | 43,366 psi | 88% | 2329 fps | 97.7% |
| Hodgdon Hybrid 100V | <<locked>> | 98% | 43,816 psi | 89% | 2365 fps | 99.5% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 43,642 psi | 89% | 2372 fps | 99.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,114 psi | 71% | 1470 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 43,395 psi | 88% | 2306 fps | 99.4% |
| IMR 3031 | <<locked>> | 82% | 44,498 psi | 90% | 2339 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 42,583 psi | 86% | 2283 fps | 98.7% |
| IMR 4831 | <<locked>> | 96% | 43,265 psi | 88% | 2369 fps | 98.3% |
| IMR 4895 | <<locked>> | 84% | 43,976 psi | 89% | 2356 fps | 99.3% |
| Lovex D073.6 | <<locked>> | 82% | 43,714 psi | 89% | 2323 fps | 100% |
| Lovex S062 | <<locked>> | 84% | 42,395 psi | 86% | 2287 fps | 99.7% |
| Lovex S065 | <<locked>> | 92% | 44,193 psi | 90% | 2320 fps | 97.1% |
| Lovex S070 | <<locked>> | 94% | 44,527 psi | 90% | 2346 fps | 96% |
| Norma 201 | <<locked>> | 82% | 43,918 psi | 89% | 2297 fps | 99.8% |
| Norma 202 | <<locked>> | 82% | 44,048 psi | 89% | 2303 fps | 100% |
| Norma 203B | <<locked>> | 84% | 42,264 psi | 86% | 2320 fps | 99% |
| Norma URP | <<locked>> | 94% | 42,221 psi | 86% | 2365 fps | 98% |
| Ramshot Big Game | <<locked>> | 84% | 41,742 psi | 85% | 2333 fps | 98.8% |
| Ramshot Hunter | <<locked>> | 96% | 44,106 psi | 89% | 2402 fps | 96.6% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,679 psi | 72% | 1506 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 43,729 psi | 89% | 2313 fps | 96.2% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 42,264 psi | 86% | 2375 fps | 98.6% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 41,829 psi | 85% | 2405 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 41,872 psi | 85% | 2388 fps | 97.7% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 42,221 psi | 86% | 2395 fps | 97.1% |
| Rottweil R 902 | <<locked>> | 84% | 44,411 psi | 90% | 2297 fps | 99.8% |
| Rottweil R 903 | <<locked>> | 88% | 42,192 psi | 86% | 2316 fps | 99.4% |
| Shooters World Long Rifle | <<locked>> | 92% | 44,193 psi | 90% | 2320 fps | 97.1% |
| Shooters World Match Rifle | <<locked>> | 82% | 43,714 psi | 89% | 2323 fps | 100% |
| Shooters World Precision | <<locked>> | 84% | 42,395 psi | 86% | 2287 fps | 99.7% |
| Shooters World SW4350 | <<locked>> | 94% | 44,527 psi | 90% | 2346 fps | 96% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 43,555 psi | 88% | 2369 fps | 99.1% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 43,265 psi | 88% | 2313 fps | 99.1% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 42,670 psi | 87% | 2218 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 43,076 psi | 87% | 2320 fps | 99.4% |
| Somchem S365 | <<locked>> | 98% | 42,830 psi | 87% | 2415 fps | 100% |
| Vihtavuori N135 | <<locked>> | 84% | 43,569 psi | 88% | 2274 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 44,440 psi | 90% | 2287 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 43,961 psi | 89% | 2306 fps | 99.9% |
| Vihtavuori N160 | <<locked>> | 94% | 44,454 psi | 90% | 2365 fps | 98.3% |
| Vihtavuori N540 | <<locked>> | 84% | 42,844 psi | 87% | 2283 fps | 100% |
| Vihtavuori N550 | <<locked>> | 94% | 43,381 psi | 88% | 2365 fps | 97.9% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 38,392 psi | 78% | 2349 fps | 97.9% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 41,742 psi | 85% | 2303 fps | 99.3% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 31,923 psi | 65% | 2270 fps | 97.2% |
| Winchester StaBALL Match | <<locked>> | 82% | 42,511 psi | 86% | 2316 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 2495 | <<locked>> | 80% | 38,276 psi | 78% | 2201 fps | 100% |
| Accurate 4064 | <<locked>> | 80% | 36,201 psi | 73% | 2195 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 32,111 psi | 65% | 2175 fps | 95.1% |
| ADI AR 2208 | <<locked>> | 80% | 35,824 psi | 73% | 2162 fps | 96.9% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 37,826 psi | 77% | 2310 fps | 97.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 35,302 psi | 72% | 2185 fps | 98.3% |
| Alliant Reloder-15 | <<locked>> | 80% | 37,927 psi | 77% | 2238 fps | 97.7% |
| Alliant Reloder-16 | <<locked>> | 86% | 33,069 psi | 67% | 2188 fps | 95.2% |
| Alliant Reloder-17 | 44.9 gr | 80% | 30,226 psi | 61% | 2146 fps | 96% |
| Alliant Reloder-23 | <<locked>> | 94% | 30,037 psi | 61% | 2146 fps | 95.6% |
| Alliant Reloder-26 | <<locked>> | 98% | 36,767 psi | 75% | 2356 fps | 95.8% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 40,959 psi | 83% | 2293 fps | 97.8% |
| Bofors RP3 | <<locked>> | 80% | 34,577 psi | 70% | 2185 fps | 98.2% |
| Hodgdon H380 | <<locked>> | 80% | 35,592 psi | 72% | 2185 fps | 95.6% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 28,297 psi | 57% | 2051 fps | 95.2% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 38,290 psi | 78% | 2277 fps | 99% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,136 psi | 53% | 1309 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 40,698 psi | 83% | 2260 fps | 99% |
| IMR 3031 | <<locked>> | 80% | 41,771 psi | 85% | 2297 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 37,550 psi | 76% | 2192 fps | 97.6% |
| IMR 4831 | <<locked>> | 88% | 33,330 psi | 68% | 2185 fps | 95.6% |
| IMR 4895 | <<locked>> | 80% | 38,812 psi | 79% | 2264 fps | 98.4% |
| Lovex D073.6 | <<locked>> | 80% | 40,915 psi | 83% | 2277 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 37,405 psi | 76% | 2198 fps | 99% |
| Lovex S065 | <<locked>> | 86% | 36,956 psi | 75% | 2188 fps | 95% |
| Lovex S070 | <<locked>> | 92% | 41,800 psi | 85% | 2300 fps | 95.2% |
| Norma 201 | <<locked>> | 80% | 41,176 psi | 84% | 2251 fps | 99.5% |
| Norma 202 | <<locked>> | 80% | 41,510 psi | 84% | 2264 fps | 100% |
| Norma 203B | <<locked>> | 80% | 37,289 psi | 76% | 2228 fps | 98% |
| Norma URP | <<locked>> | 86% | 32,837 psi | 67% | 2178 fps | 95.1% |
| Ramshot Big Game | <<locked>> | 80% | 36,463 psi | 74% | 2234 fps | 97.6% |
| Ramshot Hunter | <<locked>> | 92% | 38,899 psi | 79% | 2306 fps | 95.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,498 psi | 54% | 1342 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 41,060 psi | 83% | 2267 fps | 95.5% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 39,204 psi | 80% | 2320 fps | 98% |
| ReloadSwiss RS 60 | 44.9 gr | 80% | 32,155 psi | 65% | 2205 fps | 99% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 34,229 psi | 69% | 2238 fps | 95.4% |
| ReloadSwiss RS 70 | 51.4 gr | 90% | 37,202 psi | 75% | 2297 fps | 95.3% |
| Rottweil R 902 | <<locked>> | 80% | 39,218 psi | 80% | 2211 fps | 99.3% |
| Rottweil R 903 | <<locked>> | 80% | 32,619 psi | 66% | 2136 fps | 97.4% |
| Shooters World Long Rifle | <<locked>> | 86% | 36,956 psi | 75% | 2188 fps | 95% |
| Shooters World Match Rifle | <<locked>> | 80% | 40,915 psi | 83% | 2277 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 37,405 psi | 76% | 2198 fps | 99% |
| Shooters World SW4350 | <<locked>> | 92% | 41,800 psi | 85% | 2300 fps | 95.2% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 33,460 psi | 68% | 2175 fps | 96.8% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 40,364 psi | 82% | 2264 fps | 98.6% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 35,317 psi | 72% | 2096 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 33,547 psi | 68% | 2142 fps | 97.4% |
| Somchem S365 | <<locked>> | 82% | 25,860 psi | 52% | 2041 fps | 95.5% |
| Vihtavuori N135 | <<locked>> | 80% | 38,421 psi | 78% | 2195 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 39,204 psi | 80% | 2205 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 31,879 psi | 65% | 2090 fps | 98.2% |
| Vihtavuori N160 | <<locked>> | 86% | 34,389 psi | 70% | 2182 fps | 95.5% |
| Vihtavuori N540 | <<locked>> | 80% | 37,652 psi | 76% | 2198 fps | 99.9% |
| Vihtavuori N550 | <<locked>> | 86% | 33,663 psi | 68% | 2182 fps | 95.1% |
| Vihtavuori N555 | <<locked>> | 94% | 31,879 psi | 65% | 2211 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 28,340 psi | 57% | 2021 fps | 95.2% |
| Winchester StaBALL HD | <<locked>> | 98% | 29,979 psi | 61% | 2211 fps | 96% |
| Winchester StaBALL Match | <<locked>> | 80% | 39,842 psi | 81% | 2270 fps | 99% |
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 83 powders for 8 x 56 R M 89 Port. Krop. loaded with the .323 | 220gr | Woodleigh PP SN. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,418 fps; across all powders the maximum-charge window runs from 1,470 fps to 2,418 fps. Accurate 3100 gives the best case fill at 100 %, and 83 of the 83 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (340 MPa), the top charges use 62–90 %, leaving at least 10 % headroom. The 220.0 gr projectile in 0.323" calls for a 1:14.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, Alliant Reloder-19, Alliant Reloder-23 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 70, Alliant Reloder-17 rank at the top here: for 8 x 56 R M 89 Port. Krop. with the .323 | 220gr | Woodleigh PP SN they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate 2700, Accurate 3100, ADI AR 2209 burn incompletely and react more sensitively to barrel length and temperature. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.