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For my Air Venturi Avenger Bullpup my best power tune with NSA 22 cal .218 20.2g slugs is regulator @ 2700, HS @ 5.5 turns: I can shoot 34 shots, average of 885 ft/s, sd= 3 ft/s, range=12 ft/s. Good job NSA!!

OK. I have the reg @ 2700, 5.5 HS, I get 33 shots @ 885 ft/sec with a 20.2g slug (NSA .218), SD=3, range of 12 ft/sec. I will check this energy (35 ft lbs) in a week and see if it stays there. I have to check my accuracy @ 25,50, 75 yds and see if this gun will do the job of taking care of the...

Yes, Vetmx I turned my hammer spring back down to 5.5 turns (1/2 turn from max. I will try running the reg at 2700 and get stats on my shot string. If it is flat and acceptable then I will leave the gun there. I don't want to run the gun at the hairy edge of the power tune. See if the muzzle...

I purchased a Avenger Bullpup 22 cal a couple weeks ago. I have a chrony and I tuned the Avenger for max power shooting ZAN 23g .218 slugs at about 891 ft/sec. My reg is at 2900 and the hammer spring at 1/4 turn from max clockwise. My muzzle energy has been drifting down w/o any adjustments. Do...