Load Specifications
Load data in caliber 8 x 56 R M 89 Port. Krop. with .323 | 220gr | Brenneke TOG bullet and 64 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-16, ReloadSwiss RS 60 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% | 42,583 psi | 86% | 2264 fps | 100% |
| Accurate 4064 | <<locked>> | 86% | 42,728 psi | 87% | 2300 fps | 100% |
| Accurate 4350 | <<locked>> | 96% | 43,743 psi | 89% | 2388 fps | 98.3% |
| ADI AR 2206H | <<locked>> | 82% | 43,859 psi | 89% | 2316 fps | 99.1% |
| ADI AR 2208 | <<locked>> | 86% | 42,250 psi | 86% | 2277 fps | 98.3% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 42,395 psi | 86% | 2392 fps | 98.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 44,222 psi | 90% | 2339 fps | 99.6% |
| Alliant Reloder-15 | <<locked>> | 84% | 42,192 psi | 86% | 2310 fps | 98.5% |
| Alliant Reloder-16 | <<locked>> | 96% | 43,642 psi | 89% | 2395 fps | 98.4% |
| Alliant Reloder-17 | <<locked>> | 92% | 43,816 psi | 89% | 2428 fps | 99.5% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 34,983 psi | 71% | 2257 fps | 97.5% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 38,493 psi | 78% | 2382 fps | 96.2% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 42,960 psi | 87% | 2323 fps | 98.1% |
| Bofors RP3 | <<locked>> | 88% | 44,150 psi | 90% | 2349 fps | 99.7% |
| Hodgdon BL-C2 | <<locked>> | 82% | 44,425 psi | 90% | 2343 fps | 99.9% |
| Hodgdon H380 | <<locked>> | 86% | 42,366 psi | 86% | 2306 fps | 97.4% |
| Hodgdon H4895 | <<locked>> | 82% | 44,208 psi | 90% | 2326 fps | 99.5% |
| Hodgdon Hybrid 100V | <<locked>> | 98% | 42,685 psi | 87% | 2343 fps | 99.3% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 42,627 psi | 86% | 2349 fps | 99.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,215 psi | 71% | 1463 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 42,627 psi | 86% | 2287 fps | 99.2% |
| IMR 3031 | <<locked>> | 82% | 43,743 psi | 89% | 2323 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 44,425 psi | 90% | 2303 fps | 98.9% |
| IMR 4831 | <<locked>> | 96% | 42,076 psi | 85% | 2343 fps | 98% |
| IMR 4895 | <<locked>> | 84% | 43,163 psi | 88% | 2336 fps | 99.1% |
| Lovex D073.6 | <<locked>> | 82% | 42,598 psi | 86% | 2300 fps | 100% |
| Lovex S060 | <<locked>> | 82% | 44,135 psi | 90% | 2260 fps | 99.1% |
| Lovex S062 | <<locked>> | 86% | 44,121 psi | 89% | 2306 fps | 99.8% |
| Lovex S065 | <<locked>> | 92% | 43,279 psi | 88% | 2297 fps | 96.7% |
| Norma 201 | <<locked>> | 82% | 43,076 psi | 87% | 2277 fps | 99.7% |
| Norma 202 | <<locked>> | 82% | 43,178 psi | 88% | 2283 fps | 100% |
| Norma 203B | <<locked>> | 86% | 44,063 psi | 89% | 2343 fps | 99.2% |
| Norma URP | <<locked>> | 96% | 43,932 psi | 89% | 2385 fps | 98.2% |
| Ramshot Big Game | <<locked>> | 86% | 43,598 psi | 88% | 2356 fps | 99% |
| Ramshot Hunter | <<locked>> | 96% | 43,149 psi | 88% | 2379 fps | 96.2% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,520 psi | 72% | 1496 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 42,844 psi | 87% | 2290 fps | 95.8% |
| ReloadSwiss RS 52 | <<locked>> | 84% | 44,048 psi | 89% | 2398 fps | 98.8% |
| ReloadSwiss RS 60 | <<locked>> | 90% | 43,801 psi | 89% | 2431 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 96% | 43,685 psi | 89% | 2411 fps | 98% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 44,121 psi | 89% | 2421 fps | 97.4% |
| Rottweil R 902 | <<locked>> | 84% | 43,584 psi | 88% | 2277 fps | 99.7% |
| Rottweil R 903 | <<locked>> | 90% | 44,034 psi | 89% | 2339 fps | 99.5% |
| Shooters World Long Rifle | <<locked>> | 92% | 43,279 psi | 88% | 2297 fps | 96.7% |
| Shooters World Match Rifle | <<locked>> | 82% | 42,598 psi | 86% | 2300 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 44,121 psi | 89% | 2306 fps | 99.8% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 42,656 psi | 87% | 2346 fps | 98.9% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 43,932 psi | 89% | 2303 fps | 97.6% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 42,308 psi | 86% | 2290 fps | 98.8% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 44,266 psi | 90% | 2234 fps | 100% |
| Somchem S335 | <<locked>> | 82% | 44,179 psi | 90% | 2238 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 43,772 psi | 89% | 2306 fps | 99% |
| Somchem S355 | <<locked>> | 88% | 42,047 psi | 85% | 2297 fps | 99.2% |
| Somchem S365 | <<locked>> | 98% | 41,727 psi | 85% | 2388 fps | 99.9% |
| Vihtavuori N135 | <<locked>> | 84% | 42,859 psi | 87% | 2260 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 43,613 psi | 88% | 2267 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 42,989 psi | 87% | 2287 fps | 99.8% |
| Vihtavuori N160 | <<locked>> | 94% | 43,294 psi | 88% | 2339 fps | 97.9% |
| Vihtavuori N540 | <<locked>> | 84% | 41,858 psi | 85% | 2264 fps | 100% |
| Vihtavuori N550 | <<locked>> | 94% | 42,511 psi | 86% | 2346 fps | 97.6% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 37,333 psi | 76% | 2323 fps | 97.5% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 43,555 psi | 88% | 2323 fps | 99.4% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 31,270 psi | 63% | 2241 fps | 96.5% |
| Winchester StaBALL Match | <<locked>> | 84% | 44,367 psi | 90% | 2339 fps | 99.5% |
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% | 37,304 psi | 76% | 2178 fps | 100% |
| Accurate 4064 | <<locked>> | 80% | 35,302 psi | 72% | 2172 fps | 99.9% |
| Accurate 4350 | <<locked>> | 88% | 33,489 psi | 68% | 2198 fps | 95.5% |
| ADI AR 2206H | <<locked>> | 80% | 41,307 psi | 84% | 2274 fps | 98.7% |
| ADI AR 2208 | <<locked>> | 80% | 35,070 psi | 71% | 2139 fps | 96.5% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 37,173 psi | 75% | 2290 fps | 96.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 34,476 psi | 70% | 2162 fps | 98% |
| Alliant Reloder-15 | <<locked>> | 80% | 37,130 psi | 75% | 2215 fps | 97.3% |
| Alliant Reloder-16 | 44.9 gr | 88% | 34,272 psi | 70% | 2208 fps | 95.5% |
| Alliant Reloder-17 | 44 gr | 80% | 29,631 psi | 60% | 2123 fps | 95.5% |
| Alliant Reloder-23 | <<locked>> | 94% | 29,240 psi | 59% | 2119 fps | 95% |
| Alliant Reloder-26 | <<locked>> | 98% | 36,013 psi | 73% | 2329 fps | 95.2% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 39,987 psi | 81% | 2270 fps | 97.5% |
| Bofors RP3 | <<locked>> | 80% | 33,794 psi | 69% | 2162 fps | 97.9% |
| Hodgdon BL-C2 | <<locked>> | 80% | 41,597 psi | 84% | 2297 fps | 99.8% |
| Hodgdon H380 | <<locked>> | 80% | 34,867 psi | 71% | 2165 fps | 95.2% |
| Hodgdon H4895 | <<locked>> | 80% | 41,684 psi | 85% | 2283 fps | 99.1% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 29,472 psi | 60% | 2073 fps | 95.5% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 37,304 psi | 76% | 2254 fps | 98.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,063 psi | 53% | 1302 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 39,885 psi | 81% | 2238 fps | 98.8% |
| IMR 3031 | <<locked>> | 80% | 40,756 psi | 83% | 2277 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 36,767 psi | 75% | 2169 fps | 97.3% |
| IMR 4831 | <<locked>> | 88% | 32,663 psi | 66% | 2162 fps | 95.1% |
| IMR 4895 | <<locked>> | 80% | 37,985 psi | 77% | 2241 fps | 98.1% |
| Lovex D073.6 | <<locked>> | 80% | 39,798 psi | 81% | 2251 fps | 99.9% |
| Lovex S060 | <<locked>> | 80% | 41,611 psi | 84% | 2218 fps | 98.7% |
| Lovex S062 | <<locked>> | 80% | 36,593 psi | 74% | 2175 fps | 98.8% |
| Lovex S065 | <<locked>> | 88% | 38,247 psi | 78% | 2208 fps | 95.3% |
| Norma 201 | <<locked>> | 80% | 40,321 psi | 82% | 2228 fps | 99.4% |
| Norma 202 | <<locked>> | 80% | 40,640 psi | 82% | 2241 fps | 100% |
| Norma 203B | <<locked>> | 80% | 36,550 psi | 74% | 2205 fps | 97.7% |
| Norma URP | <<locked>> | 88% | 34,200 psi | 69% | 2201 fps | 95.4% |
| Ramshot Big Game | <<locked>> | 80% | 35,781 psi | 73% | 2215 fps | 97.3% |
| Ramshot Hunter | <<locked>> | 94% | 40,437 psi | 82% | 2329 fps | 95.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,411 psi | 54% | 1335 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 40,176 psi | 81% | 2241 fps | 95% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 38,319 psi | 78% | 2297 fps | 97.7% |
| ReloadSwiss RS 60 | 44 gr | 80% | 31,531 psi | 64% | 2182 fps | 98.7% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 35,723 psi | 72% | 2264 fps | 95.8% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 38,725 psi | 79% | 2320 fps | 95.7% |
| Rottweil R 902 | <<locked>> | 80% | 38,609 psi | 78% | 2192 fps | 99.1% |
| Rottweil R 903 | <<locked>> | 80% | 31,836 psi | 65% | 2113 fps | 97% |
| Shooters World Long Rifle | <<locked>> | 88% | 38,247 psi | 78% | 2208 fps | 95.3% |
| Shooters World Match Rifle | <<locked>> | 80% | 39,798 psi | 81% | 2251 fps | 99.9% |
| Shooters World Precision | <<locked>> | 80% | 36,593 psi | 74% | 2175 fps | 98.8% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 32,808 psi | 67% | 2156 fps | 96.4% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 41,118 psi | 83% | 2257 fps | 96.9% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 39,624 psi | 80% | 2244 fps | 98.3% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 34,722 psi | 70% | 2080 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 41,365 psi | 84% | 2195 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 40,756 psi | 83% | 2257 fps | 98.5% |
| Somchem S355 | <<locked>> | 80% | 32,764 psi | 66% | 2119 fps | 97.1% |
| Somchem S365 | <<locked>> | 82% | 25,338 psi | 51% | 2014 fps | 95% |
| Vihtavuori N135 | <<locked>> | 80% | 37,753 psi | 77% | 2178 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 38,363 psi | 78% | 2185 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 31,140 psi | 63% | 2067 fps | 97.9% |
| Vihtavuori N160 | <<locked>> | 86% | 33,562 psi | 68% | 2156 fps | 95% |
| Vihtavuori N540 | <<locked>> | 80% | 36,941 psi | 75% | 2178 fps | 99.9% |
| Vihtavuori N550 | <<locked>> | 88% | 35,085 psi | 71% | 2208 fps | 95.5% |
| Vihtavuori N555 | <<locked>> | 94% | 30,922 psi | 63% | 2185 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 29,675 psi | 60% | 2047 fps | 95.7% |
| Winchester StaBALL HD | <<locked>> | 98% | 29,341 psi | 60% | 2182 fps | 95.2% |
| Winchester StaBALL Match | <<locked>> | 80% | 38,841 psi | 79% | 2244 fps | 98.7% |
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 64 powders for 8 x 56 R M 89 Port. Krop. loaded with the .323 | 220gr | Brenneke TOG. ReloadSwiss RS 60 delivers the highest muzzle velocity at 2,431 fps; across all powders the maximum-charge window runs from 1,463 fps to 2,431 fps. Alliant Reloder-23 gives the best case fill at 100 %, and 64 of the 64 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (340 MPa), the top charges use 63–90 %, leaving at least 10 % headroom. The 220.0 gr projectile in 0.323" calls for a 1:13.0 twist; slower twists will usually not stabilise this weight. Alliant Reloder-23, Alliant Reloder-26, Hodgdon TrailBoss 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. Alliant Reloder-16, ReloadSwiss RS 60, Alliant Reloder-17 rank at the top here: for 8 x 56 R M 89 Port. Krop. with the .323 | 220gr | Brenneke TOG 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.