Load Specifications
Load data in caliber 9.3 x 72 R with .366 | 250gr | Woodleigh RN SN bullet and 4 powders. The key underlying parameters are shown in the table above.
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>> | 82% | 24,772 psi | 85% | 1929 fps | 97% |
| Hodgdon TrailBoss | <<locked>> | 84% | 25,904 psi | 89% | 1257 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 84% | 25,976 psi | 90% | 1289 fps | 100% |
| Vihtavuori N135 | <<locked>> | 82% | 26,194 psi | 90% | 1942 fps | 97.3% |
Start Load - Barrel Length: 23.62"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2495 | <<locked>> | 80% | 23,279 psi | 80% | 1890 fps | 96.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 24,410 psi | 84% | 1230 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 24,265 psi | 84% | 1257 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 24,671 psi | 85% | 1903 fps | 96.6% |
This overview compares 4 powders for 9.3 x 72 R loaded with the .366 | 250gr | Woodleigh RN SN. Vihtavuori N135 delivers the highest muzzle velocity at 1,942 fps; across all powders the maximum-charge window runs from 1,257 fps to 1,942 fps. Hodgdon TrailBoss gives the best case fill at 84 %, and 4 of the 4 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (200 MPa), the top charges use 85–90 %, leaving at least 10 % headroom. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.