Think I’ll stick with the piston

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Holds the pellets in a hollow tube; kind of like a straw. A push block follows on one end. Pushes the pellets into the chamber one at a time.


 
I have two PCP rifles. MRod and a Disco. The M-rod packs the wallop I need for effectively dealing with game here in the mountains. Rifle is just Toooo clunky. The Disco is a quick handler and a joy to shoot. 
.22 just doesn’t get it done all the time. That’s why shortly the Hatsan 95 in .25 will be replacing the M-rod which will hopefully find a new home.