Load Specifications
Load data in caliber .350 Legend with .357 | 158gr | X-TREME FP bullet and 9 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: 20"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate No. 11 FS | <<locked>> | 96% | 47,979 psi | 87% | 2211 fps | 97.1% |
| ADI AR 2205 | <<locked>> | 98% | 48,153 psi | 88% | 2146 fps | 98.7% |
| Hodgdon LilGun | <<locked>> | 94% | 49,763 psi | 90% | 2316 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 24,772 psi | 45% | 1302 fps | 100% |
| Lovex S040 | <<locked>> | 92% | 49,588 psi | 90% | 2178 fps | 100% |
| Lovex S053ᴾ | <<locked>> | 100% | 36,521 psi | 66% | 2073 fps | 96.5% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 24,018 psi | 44% | 1335 fps | 100% |
| SNPE Vectan BA6 1/2ᴾ | <<locked>> | 100% | 33,837 psi | 62% | 1965 fps | 100% |
| Vihtavuori N110ᴾ | <<locked>> | 100% | 43,250 psi | 79% | 2152 fps | 100% |
Start Load - Barrel Length: 20"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate No. 11 FS | <<locked>> | 90% | 39,363 psi | 72% | 2093 fps | 95.1% |
| ADI AR 2205 | <<locked>> | 86% | 33,489 psi | 61% | 1926 fps | 95.4% |
| Hodgdon LilGun | <<locked>> | 80% | 30,734 psi | 56% | 2044 fps | 99.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 18,028 psi | 33% | 1165 fps | 100% |
| Lovex S040 | <<locked>> | 80% | 35,070 psi | 64% | 1975 fps | 99.3% |
| Lovex S053 | <<locked>> | 96% | 32,300 psi | 59% | 1998 fps | 95.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 17,289 psi | 31% | 1188 fps | 100% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 20,117 psi | 37% | 1670 fps | 97.2% |
| Vihtavuori N110 | <<locked>> | 80% | 24,120 psi | 44% | 1814 fps | 97.4% |
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 9 powders for .350 Legend loaded with the .357 | 158gr | X-TREME FP. Hodgdon LilGun delivers the highest muzzle velocity at 2,316 fps; across all powders the maximum-charge window runs from 1,302 fps to 2,316 fps. Hodgdon TrailBoss gives the best case fill at 100 %, and 9 of the 9 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (379 MPa), the top charges use 44–90 %, leaving at least 10 % headroom. Hodgdon TrailBoss, Lovex S053, ReloadSwiss RS 14 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. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.