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Hi I will share my experience with the Huma reg and plenum in .25. I was hopping to shoot in the 890 range, from factory it was shooting between 810-825 at máx spring hammer adjustment. With the Huma/plenum at 130 bar (label at the reg) the max it got was 855 fps, max hammer spring. Without...

I’m waiting for the huma with the plenum for a .25 cal. please share your experiences with details! thank you!

Hi! Any news regarding to this topic? I´m shooting at 820 fps with 25.4gr, all stock. A friend of mine with a lathe helped me with the barrel and now is a tack driver. I´m wondering putting an huma with plenum or only a plenum, but I want to know the maximum vel achieved by you. 890 fps...