Put Huma power tune plenum and regulator (set 150 bar) in my .25 cal Bullshark yesterday evening. H&N 30.84gn Baracuda's 796fps hammer spring all the way in. Went to range today and they don't shoot for s**t with any hammer spring setting. Obviously gun just doesn't like the pellets. Unfortunately only one's on hand at the moment. Good enough for plinking my 15yd spinner the my window though so they won't be wasted.
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