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Valve port 3/16 is the sweet spot for decent improvement.
It does sound like the main spring is wasted and not hammering the valve enough. Was it left in the cocked position? Try shimming it out a bit and see if you see improvement, might just help isolate the issue.
__________________ Sgt. Hollywood's feedback Mini collection Old School VM68 Mag with PPS Stab, dual bottle (rear and slant. Ported valve and Starfire Bolt (alum), tweaked springs & Lapco Cocker adapter.
Pneumatic Design Storm Oddball marker but fairly accurate.
Phantom 6",11 & 14"" DanW .45 Grips SC hori feed now VSC, Shoed up. PGP Blinging, Classic AutoMag (mini) "Tactical" custom,
Trracer Rifle in the works, 2k+VF WGP cocker, 2 Trilly Pump "Sniper" conversions, 3 Trracers
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