Load Specifications
Load data in caliber .44 S&W Russian with .429 | 240gr | LOS RNFP bullet and 2 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 ≥ 60% and propellant combustion ≥ 80%. 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: 4.5"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Hodgdon TrailBoss | <<locked>> | 80% | 12,879 psi | 89% | 676 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 84% | 12,923 psi | 89% | 699 fps | 100% |
Start Load - Barrel Length: 4.5"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Hodgdon TrailBoss² | <<locked>> | 60% | 8,978 psi | 62% | 577 fps | 100% |
| ReloadSwiss RS 14² | <<locked>> | 60% | 8,717 psi | 60% | 581 fps | 99.8% |
² fill rate low - you might want to consider using a filler to ensure proper ignition.
This overview compares 1 powders for .44 S&W Russian loaded with the .429 | 240gr | LOS RNFP. ReloadSwiss RS 14 delivers the highest muzzle velocity at 699 fps; across all powders the maximum-charge window runs from 699 fps to 699 fps. ReloadSwiss RS 14 gives the best case fill at 84 %, and 1 of the 1 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (100 MPa), the top charges use 89–89 %, leaving at least 11 % headroom. ReloadSwiss RS 14 stay subsonic at start load. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.