Load Specifications
Load data in caliber .350 Legend with .355 | 155gr | Sierra FN Pro-Hunter 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% | 49,211 psi | 89% | 2343 fps | 98.5% |
| ADI AR 2205 | <<locked>> | 94% | 48,660 psi | 88% | 2264 fps | 99.5% |
| Hodgdon LilGun | <<locked>> | 88% | 48,863 psi | 89% | 2398 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 26,324 psi | 48% | 1401 fps | 100% |
| IMR 4227ᴾ | <<locked>> | 100% | 45,440 psi | 83% | 2290 fps | 96.4% |
| Lovex S040 | <<locked>> | 86% | 47,137 psi | 86% | 2254 fps | 100% |
| Lovex S053ᴾ | <<locked>> | 100% | 42,308 psi | 77% | 2267 fps | 98.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 25,556 psi | 46% | 1430 fps | 100% |
| ReloadSwiss RS 36ᴾ | <<locked>> | 100% | 42,917 psi | 78% | 2297 fps | 95.7% |
| Shooters World SOCOM | <<locked>> | 94% | 48,718 psi | 89% | 2316 fps | 95.9% |
| SNPE Vectan BA6 1/2ᴾ | <<locked>> | 100% | 39,102 psi | 71% | 2133 fps | 100% |
| Vihtavuori N110 | <<locked>> | 98% | 47,877 psi | 87% | 2306 fps | 100% |
| Vihtavuori N120ᴾ | <<locked>> | 100% | 34,447 psi | 63% | 2175 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 | 25.6 gr | 82% | 35,230 psi | 64% | 2126 fps | 95.4% |
| ADI AR 2205 | 23 gr | 80% | 31,763 psi | 58% | 1995 fps | 96.3% |
| Hodgdon LilGun | <<locked>> | 80% | 37,101 psi | 67% | 2238 fps | 100% |
| Hodgdon TrailBoss | <<locked>> | 80% | 19,261 psi | 35% | 1253 fps | 100% |
| IMR 4227 | <<locked>> | 96% | 40,451 psi | 74% | 2215 fps | 95.1% |
| Lovex S040 | <<locked>> | 80% | 39,566 psi | 72% | 2146 fps | 100% |
| Lovex S053 | <<locked>> | 86% | 28,369 psi | 52% | 2008 fps | 95.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 18,507 psi | 34% | 1276 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 98% | 40,770 psi | 74% | 2264 fps | 95.1% |
| Shooters World SOCOM | <<locked>> | 92% | 45,745 psi | 83% | 2277 fps | 95.3% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 23,148 psi | 42% | 1831 fps | 99.3% |
| Vihtavuori N110 | 20.7 gr | 80% | 28,181 psi | 51% | 1991 fps | 99.4% |
| Vihtavuori N120 | <<locked>> | 98% | 32,372 psi | 59% | 2133 fps | 95.5% |
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 13 powders for .350 Legend loaded with the .355 | 155gr | Sierra FN Pro-Hunter. Hodgdon LilGun delivers the highest muzzle velocity at 2,398 fps; across all powders the maximum-charge window runs from 1,401 fps to 2,398 fps. Hodgdon TrailBoss gives the best case fill at 100 %, and 13 of the 13 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. Hodgdon TrailBoss, IMR 4227, Lovex S053 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 .355 | 155gr | Sierra FN Pro-Hunter they combine a high case fill with complete burn and sit in the upper velocity band. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.