Thoughts on Leshiy .20cal 350mm barrel

Hi Guys
After some thoughts on .20cal 350mm barrel for my Leshiy any one using this calibre setup
I’m currently running a 250mm barrel in .22cal at 17 ft/lbs on the standard Edgun reg for my hunting setup getting 40+ usable shots from 300bar fill.
Looking to run the .20cal for a slightly flatter trajectory fun plinking along with fitting the new 12ft/lbs humma small plenum regulator setup but still want to have a bit more punch than a .177 cal for small game.
Any one running there Leshiy in .20 cal advice would be appreciated
Cheers