Load Specifications
Load data in caliber .600 N.E. with .620 | 900gr | A-Square MONO RN bullet and 9 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-23, Somchem S365 and Hodgdon Hybrid 100V.
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: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Alliant Reloder-17 | <<locked>> | 82% | 31,154 psi | 88% | 2028 fps | 97.4% |
| Alliant Reloder-23 | <<locked>> | 96% | 30,560 psi | 86% | 2021 fps | 96.9% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 30,893 psi | 87% | 1975 fps | 97.3% |
| Hodgdon TrailBoss | <<locked>> | 92% | 31,401 psi | 88% | 1286 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 92% | 31,749 psi | 89% | 1316 fps | 100% |
| Somchem S365 | <<locked>> | 90% | 31,908 psi | 90% | 2054 fps | 98.9% |
| Vihtavuori N555 | <<locked>> | 94% | 30,385 psi | 86% | 2037 fps | 96.2% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 31,169 psi | 88% | 1952 fps | 97.4% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 30,574 psi | 86% | 2093 fps | 97.6% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Alliant Reloder-17 | <<locked>> | 80% | 29,269 psi | 82% | 1982 fps | 96.6% |
| Alliant Reloder-23 | 153.2 gr | 92% | 27,180 psi | 76% | 1939 fps | 95.2% |
| Hodgdon Hybrid 100V | 138.3 gr | 84% | 27,369 psi | 77% | 1893 fps | 95.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,150 psi | 74% | 1198 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,426 psi | 74% | 1227 fps | 100% |
| Somchem S365 | 135.5 gr | 80% | 23,482 psi | 66% | 1841 fps | 95.2% |
| Vihtavuori N555 | <<locked>> | 92% | 28,645 psi | 81% | 1998 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 27,470 psi | 77% | 1867 fps | 95.8% |
| Winchester StaBALL HD | <<locked>> | 96% | 27,093 psi | 76% | 1991 fps | 95.3% |
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 31 powders for .600 N.E. loaded with the .620 | 900gr | A-Square MONO RN. Winchester StaBALL HD delivers the highest muzzle velocity at 2,093 fps; across all powders the maximum-charge window runs from 1,286 fps to 2,093 fps. Alliant Reloder-25 gives the best case fill at 100 %, and 31 of the 31 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (245 MPa), the top charges use 81–90 %, leaving at least 10 % headroom. Alliant Reloder-25, Lovex S071, Winchester StaBALL HD 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-23, Somchem S365, Hodgdon Hybrid 100V rank at the top here: for .600 N.E. with the .620 | 900gr | A-Square MONO RN they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate 3100, Alliant Reloder-25, Alliant Reloder-26 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.