Air pistols, springer types at any rate, work in the pop gun phase and need fast start pellets.
JSB Express, H&N finale, and Hobby if a bigger bore..
Having said that the Ruger is only ever going to be a 2ftlb gun and i am real sus of that tiny cocking arm (mechanically speaking)
I have always maintained that Umarex should have developed a Ruger Co2 but different from the endless bunch of same pistols with auto mags.
How about a bulb in the grip but a single shot break open barrel like this Ruger Mk4 layout.
In this way we could have perfect breech sealing and pellet placed direct into bore with the thumb for outstanding accuracy….probably power too with the perfect sealing and relatively long barrel.