Load Specifications
Load data in caliber .350 Legend with .357 | 158gr | X-TREME SWC bullet and 13 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Accurate No. 11 FS, Vihtavuori N110 and ADI AR 2205.
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>> | 92% | 48,631 psi | 88% | 2306 fps | 98.5% |
| ADI AR 2205 | <<locked>> | 94% | 48,515 psi | 88% | 2234 fps | 99.5% |
| Hodgdon LilGun | <<locked>> | 88% | 48,689 psi | 89% | 2365 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 26,266 psi | 48% | 1378 fps | 100% |
| IMR 4227ᴾ | <<locked>> | 100% | 45,368 psi | 82% | 2260 fps | 96.4% |
| Lovex S040 | <<locked>> | 86% | 47,239 psi | 86% | 2224 fps | 100% |
| Lovex S053ᴾ | <<locked>> | 100% | 42,163 psi | 77% | 2234 fps | 98.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 25,483 psi | 46% | 1407 fps | 100% |
| ReloadSwiss RS 36ᴾ | <<locked>> | 100% | 42,989 psi | 78% | 2267 fps | 95.8% |
| Shooters World SOCOM | <<locked>> | 94% | 48,225 psi | 88% | 2280 fps | 95.9% |
| SNPE Vectan BA6 1/2ᴾ | <<locked>> | 100% | 39,305 psi | 71% | 2106 fps | 100% |
| Vihtavuori N110 | <<locked>> | 98% | 47,529 psi | 86% | 2274 fps | 100% |
| Vihtavuori N120ᴾ | <<locked>> | 100% | 34,403 psi | 63% | 2146 fps | 96.3% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 20"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate No. 11 FS | 25.2 gr | 82% | 35,404 psi | 64% | 2103 fps | 95.6% |
| ADI AR 2205 | 22.6 gr | 80% | 31,821 psi | 58% | 1969 fps | 96.4% |
| Hodgdon LilGun | <<locked>> | 80% | 36,767 psi | 67% | 2205 fps | 100% |
| Hodgdon TrailBoss | <<locked>> | 80% | 19,072 psi | 35% | 1230 fps | 100% |
| IMR 4227 | <<locked>> | 96% | 40,263 psi | 73% | 2182 fps | 95.1% |
| Lovex S040 | <<locked>> | 80% | 39,465 psi | 72% | 2116 fps | 100% |
| Lovex S053 | <<locked>> | 86% | 28,398 psi | 52% | 1982 fps | 95.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 18,652 psi | 34% | 1260 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 98% | 40,350 psi | 73% | 2228 fps | 95.1% |
| Shooters World SOCOM | <<locked>> | 92% | 45,324 psi | 82% | 2241 fps | 95.2% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 22,989 psi | 42% | 1804 fps | 99.3% |
| Vihtavuori N110 | 20.4 gr | 80% | 28,355 psi | 52% | 1969 fps | 99.4% |
| Vihtavuori N120 | <<locked>> | 98% | 32,329 psi | 59% | 2106 fps | 95.6% |
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 21 powders for .350 Legend loaded with the .357 | 158gr | X-TREME SWC. Hodgdon LilGun delivers the highest muzzle velocity at 2,365 fps; across all powders the maximum-charge window runs from 1,378 fps to 2,365 fps. Accurate 1680 gives the best case fill at 100 %, and 21 of the 21 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (379 MPa), the top charges use 46–89 %, leaving at least 11 % headroom. Accurate 1680, ADI AR 2207, Alliant Reloder-7 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. Accurate No. 11 FS, Vihtavuori N110, ADI AR 2205 rank at the top here: for .350 Legend with the .357 | 158gr | X-TREME SWC they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate 1680, ADI AR 2207, Alliant Reloder-7 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.