Load Specifications
Load data in caliber 8 x 56 R M 89 Port. Krop. with 8 mm | 180gr | TWENTY-NINE ERTP bullet and 64 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.
A valid access license is required to use the Personalized Load Calculator.
You can find more information in our FAQ: How can I use the Personalized Load Calculator?
Max Load - Barrel Length: 23.62"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 84% | 43,062 psi | 87% | 2467 fps | 100% |
| Accurate 2460 | <<locked>> | 82% | 43,874 psi | 89% | 2513 fps | 99.6% |
| Accurate 2495 | <<locked>> | 90% | 42,250 psi | 86% | 2510 fps | 100% |
| Accurate 2520 | <<locked>> | 86% | 44,382 psi | 90% | 2559 fps | 99.5% |
| Accurate 4064 | <<locked>> | 92% | 42,148 psi | 85% | 2539 fps | 99.8% |
| ADI AR 2206H | <<locked>> | 88% | 44,599 psi | 90% | 2559 fps | 97.3% |
| ADI AR 2208 | <<locked>> | 92% | 42,902 psi | 87% | 2510 fps | 96.1% |
| ADI Benchmark 8208 | <<locked>> | 86% | 44,309 psi | 90% | 2530 fps | 98.3% |
| Alliant AR-Comp | <<locked>> | 86% | 42,728 psi | 87% | 2533 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 94% | 44,338 psi | 90% | 2575 fps | 98.1% |
| Alliant Reloder-15 | <<locked>> | 90% | 42,409 psi | 86% | 2543 fps | 96.2% |
| Alliant Reloder-17 | <<locked>> | 98% | 44,512 psi | 90% | 2657 fps | 97.6% |
| Baschieri & Pellagri 107 | <<locked>> | 88% | 43,714 psi | 89% | 2559 fps | 95.8% |
| Bofors RP3 | <<locked>> | 94% | 43,903 psi | 89% | 2582 fps | 98.2% |
| Hodgdon Benchmark | <<locked>> | 84% | 43,990 psi | 89% | 2480 fps | 98.7% |
| Hodgdon BL-C2 | <<locked>> | 86% | 42,119 psi | 85% | 2543 fps | 98.5% |
| Hodgdon CFE223 | <<locked>> | 84% | 43,424 psi | 88% | 2612 fps | 96.4% |
| Hodgdon H322 | <<locked>> | 82% | 44,599 psi | 90% | 2543 fps | 100% |
| Hodgdon H4895 | <<locked>> | 86% | 42,235 psi | 86% | 2523 fps | 97.3% |
| Hodgdon LEVERevolution | <<locked>> | 90% | 43,149 psi | 88% | 2592 fps | 98% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,258 psi | 69% | 1604 fps | 100% |
| Hodgdon VARGET | <<locked>> | 88% | 43,526 psi | 88% | 2530 fps | 97.5% |
| IMR 3031 | <<locked>> | 88% | 43,613 psi | 88% | 2579 fps | 100% |
| IMR 4064 | <<locked>> | 90% | 42,366 psi | 86% | 2493 fps | 96.2% |
| IMR 4895 | <<locked>> | 90% | 43,395 psi | 88% | 2572 fps | 97.2% |
| IMR 8208 XBR | <<locked>> | 86% | 44,309 psi | 90% | 2530 fps | 98.3% |
| Lovex D073.5 | <<locked>> | 82% | 43,468 psi | 88% | 2510 fps | 98.9% |
| Lovex D073.6 | <<locked>> | 88% | 42,685 psi | 87% | 2543 fps | 99.3% |
| Lovex S060 | <<locked>> | 86% | 43,033 psi | 87% | 2461 fps | 96.9% |
| Lovex S062 | <<locked>> | 92% | 44,309 psi | 90% | 2546 fps | 98.5% |
| Norma 201 | <<locked>> | 88% | 43,859 psi | 89% | 2520 fps | 98.3% |
| Norma 202 | <<locked>> | 88% | 43,787 psi | 89% | 2533 fps | 99.7% |
| Norma 203B | <<locked>> | 92% | 44,251 psi | 90% | 2579 fps | 97.3% |
| Ramshot Big Game | <<locked>> | 92% | 44,382 psi | 90% | 2598 fps | 97% |
| Ramshot Wild Boar | <<locked>> | 86% | 43,352 psi | 88% | 2546 fps | 96.9% |
| Ramshot X-Terminator | <<locked>> | 82% | 42,554 psi | 86% | 2474 fps | 96.6% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 34,374 psi | 70% | 1640 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 44,106 psi | 89% | 2523 fps | 99.3% |
| ReloadSwiss RS 52 | <<locked>> | 90% | 44,092 psi | 89% | 2638 fps | 96.6% |
| ReloadSwiss RS 60 | <<locked>> | 96% | 44,498 psi | 90% | 2674 fps | 99.5% |
| Rottweil R 901 | <<locked>> | 84% | 42,554 psi | 86% | 2477 fps | 99.5% |
| Rottweil R 902 | <<locked>> | 90% | 44,034 psi | 89% | 2516 fps | 98.3% |
| Rottweil R 903 | <<locked>> | 96% | 43,758 psi | 89% | 2572 fps | 97.8% |
| Shooters World Match Rifle | <<locked>> | 88% | 42,685 psi | 87% | 2543 fps | 99.3% |
| Shooters World Precision | <<locked>> | 92% | 44,309 psi | 90% | 2546 fps | 98.5% |
| SNPE Vectan SP 11 | <<locked>> | 94% | 42,902 psi | 87% | 2579 fps | 96.7% |
| SNPE Vectan SP 9 | <<locked>> | 88% | 43,018 psi | 87% | 2530 fps | 96.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 43,337 psi | 88% | 2444 fps | 99.6% |
| SNPE Vectan Tubal 5000 | <<locked>> | 92% | 42,380 psi | 86% | 2441 fps | 99.9% |
| Somchem S321 | <<locked>> | 82% | 41,858 psi | 85% | 2507 fps | 98.1% |
| Somchem S335 | <<locked>> | 86% | 42,351 psi | 86% | 2444 fps | 99.9% |
| Somchem S341 | <<locked>> | 88% | 44,599 psi | 90% | 2546 fps | 97.1% |
| Somchem S355 | <<locked>> | 94% | 42,119 psi | 85% | 2526 fps | 97.2% |
| Somchem S365ᴾ | <<locked>> | 100% | 36,419 psi | 74% | 2497 fps | 96.8% |
| Vihtavuori N130 | <<locked>> | 82% | 43,366 psi | 88% | 2431 fps | 100% |
| Vihtavuori N133 | <<locked>> | 86% | 43,250 psi | 88% | 2444 fps | 100% |
| Vihtavuori N135 | <<locked>> | 90% | 42,569 psi | 86% | 2507 fps | 100% |
| Vihtavuori N140 | <<locked>> | 90% | 44,150 psi | 90% | 2516 fps | 99.9% |
| Vihtavuori N150 | <<locked>> | 96% | 43,163 psi | 88% | 2520 fps | 98.6% |
| Vihtavuori N530 | <<locked>> | 86% | 44,396 psi | 90% | 2526 fps | 98.4% |
| Vihtavuori N540 | <<locked>> | 90% | 42,496 psi | 86% | 2507 fps | 99.5% |
| Winchester 6.5 StaBALL | <<locked>> | 98% | 41,872 psi | 85% | 2497 fps | 96.9% |
| Winchester 748 | <<locked>> | 86% | 43,004 psi | 87% | 2566 fps | 98.9% |
| Winchester StaBALL Match | <<locked>> | 88% | 42,134 psi | 85% | 2533 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% | 37,971 psi | 77% | 2379 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 41,017 psi | 83% | 2464 fps | 99.3% |
| Accurate 2495 | <<locked>> | 80% | 30,429 psi | 62% | 2280 fps | 99.5% |
| Accurate 2520 | <<locked>> | 80% | 36,114 psi | 73% | 2405 fps | 98.2% |
| Accurate 4064 | <<locked>> | 80% | 28,790 psi | 58% | 2254 fps | 97% |
| ADI AR 2206H | <<locked>> | 82% | 36,970 psi | 75% | 2411 fps | 95.2% |
| ADI AR 2208 | <<locked>> | 90% | 40,379 psi | 82% | 2461 fps | 95.3% |
| ADI Benchmark 8208 | <<locked>> | 80% | 36,753 psi | 75% | 2382 fps | 96.5% |
| Alliant AR-Comp | <<locked>> | 80% | 35,056 psi | 71% | 2395 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 34,403 psi | 70% | 2382 fps | 95.5% |
| Alliant Reloder-15 | <<locked>> | 88% | 39,682 psi | 80% | 2487 fps | 95.4% |
| Alliant Reloder-17 | 50.3 gr | 92% | 36,579 psi | 74% | 2490 fps | 95% |
| Baschieri & Pellagri 107 | <<locked>> | 86% | 40,973 psi | 83% | 2510 fps | 95% |
| Bofors RP3 | <<locked>> | 86% | 33,649 psi | 68% | 2379 fps | 95.3% |
| Hodgdon Benchmark | <<locked>> | 80% | 38,856 psi | 79% | 2385 fps | 97.7% |
| Hodgdon BL-C2 | <<locked>> | 80% | 34,403 psi | 70% | 2385 fps | 96.5% |
| Hodgdon CFE223 | <<locked>> | 82% | 40,625 psi | 82% | 2559 fps | 95.6% |
| Hodgdon H322 | <<locked>> | 80% | 41,626 psi | 84% | 2490 fps | 99.9% |
| Hodgdon H4895 | <<locked>> | 80% | 34,983 psi | 71% | 2372 fps | 95.2% |
| Hodgdon LEVERevolution | 45.7 gr | 84% | 35,447 psi | 72% | 2431 fps | 95.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,208 psi | 51% | 1427 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 36,013 psi | 73% | 2382 fps | 95.4% |
| IMR 3031 | <<locked>> | 80% | 33,591 psi | 68% | 2385 fps | 99.4% |
| IMR 4064 | <<locked>> | 88% | 39,856 psi | 81% | 2444 fps | 95.5% |
| IMR 4895 | <<locked>> | 86% | 38,189 psi | 77% | 2470 fps | 95.7% |
| IMR 8208 XBR | <<locked>> | 80% | 36,753 psi | 75% | 2382 fps | 96.5% |
| Lovex D073.5 | <<locked>> | 80% | 40,640 psi | 82% | 2461 fps | 98.4% |
| Lovex D073.6 | <<locked>> | 80% | 32,561 psi | 66% | 2339 fps | 97.1% |
| Lovex S060 | <<locked>> | 82% | 38,232 psi | 78% | 2369 fps | 95.6% |
| Lovex S062 | <<locked>> | 82% | 32,706 psi | 66% | 2310 fps | 95.3% |
| Norma 201 | <<locked>> | 80% | 34,185 psi | 69% | 2326 fps | 95.8% |
| Norma 202 | <<locked>> | 80% | 33,997 psi | 69% | 2343 fps | 98.2% |
| Norma 203B | <<locked>> | 86% | 36,651 psi | 74% | 2431 fps | 95.1% |
| Ramshot Big Game | <<locked>> | 88% | 38,740 psi | 79% | 2487 fps | 95.4% |
| Ramshot Wild Boar | <<locked>> | 82% | 37,797 psi | 77% | 2438 fps | 95.3% |
| Ramshot X-Terminator | <<locked>> | 80% | 39,914 psi | 81% | 2425 fps | 95.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 25,411 psi | 52% | 1463 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 41,234 psi | 84% | 2470 fps | 98.8% |
| ReloadSwiss RS 52 | <<locked>> | 86% | 38,667 psi | 78% | 2530 fps | 95% |
| ReloadSwiss RS 60 | 47 gr | 86% | 32,169 psi | 65% | 2388 fps | 95.9% |
| Rottweil R 901 | <<locked>> | 80% | 37,753 psi | 77% | 2385 fps | 98.7% |
| Rottweil R 902 | <<locked>> | 80% | 32,518 psi | 66% | 2280 fps | 95.1% |
| Rottweil R 903 | <<locked>> | 88% | 33,736 psi | 68% | 2372 fps | 95% |
| Shooters World Match Rifle | <<locked>> | 80% | 32,561 psi | 66% | 2339 fps | 97.1% |
| Shooters World Precision | <<locked>> | 82% | 32,706 psi | 66% | 2310 fps | 95.3% |
| SNPE Vectan SP 11 | <<locked>> | 90% | 37,681 psi | 76% | 2470 fps | 95.1% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 37,985 psi | 77% | 2431 fps | 95.4% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 35,911 psi | 73% | 2306 fps | 98.5% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 29,225 psi | 59% | 2175 fps | 97.7% |
| Somchem S321 | <<locked>> | 80% | 39,204 psi | 80% | 2454 fps | 97.6% |
| Somchem S335 | <<locked>> | 80% | 35,404 psi | 72% | 2313 fps | 99% |
| Somchem S341 | <<locked>> | 84% | 39,059 psi | 79% | 2444 fps | 95.7% |
| Somchem S355 | <<locked>> | 88% | 35,041 psi | 71% | 2385 fps | 95.1% |
| Somchem S365 | <<locked>> | 96% | 32,097 psi | 65% | 2392 fps | 95% |
| Vihtavuori N130 | <<locked>> | 80% | 40,799 psi | 83% | 2388 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 35,882 psi | 73% | 2313 fps | 99.9% |
| Vihtavuori N135 | <<locked>> | 80% | 30,966 psi | 63% | 2283 fps | 99.5% |
| Vihtavuori N140 | <<locked>> | 80% | 32,039 psi | 65% | 2283 fps | 98% |
| Vihtavuori N150 | <<locked>> | 86% | 31,183 psi | 63% | 2277 fps | 95.3% |
| Vihtavuori N530 | <<locked>> | 80% | 36,405 psi | 74% | 2372 fps | 96.5% |
| Vihtavuori N540 | <<locked>> | 80% | 30,806 psi | 62% | 2267 fps | 97% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 36,854 psi | 75% | 2395 fps | 95.2% |
| Winchester 748 | <<locked>> | 80% | 35,099 psi | 71% | 2405 fps | 97.1% |
| Winchester StaBALL Match | <<locked>> | 82% | 34,519 psi | 70% | 2379 fps | 95% |
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 8 mm | 180gr | TWENTY-NINE ERTP. ReloadSwiss RS 60 delivers the highest muzzle velocity at 2,674 fps; across all powders the maximum-charge window runs from 1,604 fps to 2,674 fps. Hodgdon TrailBoss 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 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, Hodgdon LEVERevolution rank at the top here: for 8 x 56 R M 89 Port. Krop. with the 8 mm | 180gr | TWENTY-NINE ERTP 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.