Load Specifications
Load data in caliber .600 N.E. with .620 | 900gr | Woodleigh FMJ bullet and 12 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Somchem S365, ReloadSwiss RS 14 and Hodgdon TrailBoss.
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- TS 15.5 | <<locked>> | 82% | 31,662 psi | 89% | 1923 fps | 97.3% |
| Alliant Reloder-17 | <<locked>> | 86% | 31,343 psi | 88% | 1975 fps | 96.2% |
| Bofors RP3 | <<locked>> | 82% | 30,879 psi | 87% | 1923 fps | 97.2% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 30,792 psi | 87% | 1919 fps | 96% |
| Hodgdon TrailBoss | <<locked>> | 94% | 31,676 psi | 89% | 1243 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 94% | 32,010 psi | 90% | 1276 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 31,328 psi | 88% | 1985 fps | 98.6% |
| Rottweil R 903 | <<locked>> | 84% | 31,038 psi | 87% | 1919 fps | 96.9% |
| Somchem S355 | <<locked>> | 82% | 30,356 psi | 85% | 1890 fps | 96.3% |
| Somchem S365 | <<locked>> | 94% | 31,488 psi | 89% | 1991 fps | 97.9% |
| Vihtavuori N150 | <<locked>> | 84% | 30,632 psi | 86% | 1880 fps | 97.8% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 31,517 psi | 89% | 1903 fps | 96.3% |
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- TS 15.5 | <<locked>> | 80% | 29,747 psi | 84% | 1883 fps | 96.6% |
| Alliant Reloder-17 | <<locked>> | 84% | 29,399 psi | 83% | 1929 fps | 95.2% |
| Bofors RP3 | <<locked>> | 80% | 28,964 psi | 82% | 1883 fps | 96.5% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 29,008 psi | 82% | 1880 fps | 95.2% |
| Hodgdon TrailBoss | 40.6 gr | 80% | 25,657 psi | 72% | 1148 fps | 100% |
| ReloadSwiss RS 14 | 41.3 gr | 80% | 25,773 psi | 73% | 1175 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 27,644 psi | 78% | 1896 fps | 97.1% |
| Rottweil R 903 | <<locked>> | 80% | 27,209 psi | 77% | 1837 fps | 95.4% |
| Somchem S355 | <<locked>> | 80% | 28,514 psi | 80% | 1850 fps | 95.6% |
| Somchem S365 | 131.7 gr | 88% | 26,339 psi | 74% | 1870 fps | 95.6% |
| Vihtavuori N150 | <<locked>> | 80% | 26,948 psi | 76% | 1804 fps | 96.5% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 29,573 psi | 83% | 1860 fps | 95.4% |
Recommended = one of the top powders for this cartridge and bullet combination.
This overview compares 28 powders for .600 N.E. loaded with the .620 | 900gr | Woodleigh FMJ. Vihtavuori N555 delivers the highest muzzle velocity at 2,011 fps; across all powders the maximum-charge window runs from 1,243 fps to 2,011 fps. Alliant Reloder-23 gives the best case fill at 100 %, and 28 of the 28 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (245 MPa), the top charges use 75–90 %, leaving at least 10 % headroom. Alliant Reloder-23, Vihtavuori N555, 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. Somchem S365, ReloadSwiss RS 14, Hodgdon TrailBoss rank at the top here: for .600 N.E. with the .620 | 900gr | Woodleigh FMJ they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Alliant Reloder-16, Alliant Reloder-26, IMR 4831 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.