Load Specifications
Load data in caliber .17 Libra with .172 | 22gr | Impala LW CFN bullet and 9 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Hodgdon LilGun, Lovex S040 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: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate No. 11 FS | <<locked>> | 98% | 53,548 psi | 86% | 3402 fps | 96.4% |
| ADI APS 450 | <<locked>> | 88% | 56,173 psi | 90% | 2674 fps | 100% |
| ADI AR 2205ᴾ | <<locked>> | 100% | 52,779 psi | 85% | 3301 fps | 98.1% |
| Hodgdon LilGun | <<locked>> | 96% | 55,361 psi | 89% | 3563 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 25,773 psi | 41% | 2041 fps | 100% |
| Lovex S040 | <<locked>> | 94% | 53,664 psi | 86% | 3366 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 25,483 psi | 41% | 2096 fps | 100% |
| SNPE Vectan BA6 1/2ᴾ | <<locked>> | 100% | 35,143 psi | 56% | 2989 fps | 99.8% |
| Vihtavuori N110ᴾ | <<locked>> | 100% | 45,629 psi | 73% | 3287 fps | 99.9% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate No. 11 FS | <<locked>> | 94% | 47,050 psi | 75% | 3287 fps | 95% |
| ADI APS 450 | <<locked>> | 80% | 48,675 psi | 78% | 2549 fps | 100% |
| ADI AR 2205 | 8.2 gr | 90% | 39,885 psi | 64% | 3045 fps | 95.4% |
| Hodgdon LilGun | 7.9 gr | 80% | 32,489 psi | 52% | 3104 fps | 98.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 19,479 psi | 31% | 1844 fps | 100% |
| Lovex S040 | 6.8 gr | 80% | 36,158 psi | 58% | 3009 fps | 98.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 18,550 psi | 30% | 1867 fps | 100% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 22,220 psi | 36% | 2575 fps | 96.1% |
| Vihtavuori N110 | <<locked>> | 80% | 25,889 psi | 42% | 2776 fps | 95.9% |
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 9 powders for .17 Libra loaded with the .172 | 22gr | Impala LW CFN. Hodgdon LilGun delivers the highest muzzle velocity at 3,563 fps; across all powders the maximum-charge window runs from 2,041 fps to 3,563 fps. ADI AR 2205 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 (430 MPa), the top charges use 41–90 %, leaving at least 10 % headroom. The 22.0 gr projectile in 0.172" calls for a 1:8.0 twist; slower twists will usually not stabilise this weight. ADI AR 2205, Hodgdon TrailBoss, 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. Hodgdon LilGun, Lovex S040, ADI AR 2205 rank at the top here: for .17 Libra with the .172 | 22gr | Impala LW CFN 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.