JSB Hades / FX Atomic .22 Optimal Range of Speed

[chip78]

Any recommendations for speed?

- Gun: FX Maverick 600mm barrel in .22
- Purpose: Squirrels 20-60 yards

The gun is currently tuned to shoot 18.13 gr JSB/FX dome pellets at around 875 FPS.

I saw people shooting Hades at higher speeds than domes. Is it true .22 Hades stays accurate up to 950 FPS for 50 yards?

Thank you!

 

[rangur1]

Inherently, pellets like to go in the 820-880 FPS for their top speeds. However, speed is also dependent on your guns twist rate with higher twist rates being more conducive for higher speeds and lower twist rates accomodating lower speeds. higher twist rates like CZ barrels - Taipan, Kalibrgun, AGT utilize a 1/17.7 twist rate while lower rates like on some FX are 1/22- but FX has many, many liner variations. Personally, where your gun is already set at powerwise, the Hades will be going about 885-890 because of the lighter pellet weight. shoot it at that distance and see if it's accurate. You may not need to change anything.

 

[Gerry52]

My FX Royale .25 is slinging Hades/Atomic at around 900fps with supreme accuracy but it's hard to generalize about "all" airguns. Due to inherent finicky nature of airguns, one has to try & see for themselves if these settings work with THEIR particular gun.

 

[chip78]

Inherently, pellets like to go in the 820-880 FPS for their top speeds. However, speed is also dependent on your guns twist rate with higher twist rates being more conducive for higher speeds and lower twist rates accomodating lower speeds. higher twist rates like CZ barrels - Taipan, Kalibrgun, AGT utilize a 1/17.7 twist rate while lower rates like on some FX are 1/22- but FX has many, many liner variations. Personally, where your gun is already set at powerwise, the Hades will be going about 885-890 because of the lighter pellet weight. shoot it at that distance and see if it's accurate. You may not need to change anything.

Thanks for the advice. My barrel is STX of the generation just before the latest. It has two transfer ports without the bridge in the larger port. I read it has a twist rate of 1:24. So it is slow, which would make it suitable for typical pellet speeds. I’ll try the same setting as 18.13 first and possibly turn the power wheel a click or two lower.