Not a hi-kack to me ,very good info ,gotta pic of the pup I've never seen one, Oh and my avenger came today ,fedex delivers on sunday here in hot as hell Texas, got a thread going on gta ck it out.
Adjusted the trigger to 2 lb ,and the reg to 2600 psi and backed the HS off 1 turn ,shooting 25.4 JSB pellets at 897 .groups at 35yds tighten up a bit .
Cleaned the barrel? I would try shooting it starting at 3600psi or less and work your way down lower start fill pressure. You may be surprised. Reg sounds kinda high even for a 25 cal. I would try 2400.