I am not expert in this area but I had a somewhat similiar issue with my Vortex when it was new. The trigger "problem" worked itself out after a couple of hundred shots. Reason I felt it was a problem was that I owned a phoenix and I felt its trigger was better than any rifle I ever owned. I then got the vortex and something just did not feel right but after shooting it for awhile the trigger became acceptable. I still feel that my phoenix's trigger is more responsive to my touch but now the vortex's trigger functions pretty well. hopefully you may get some more input from other members.
Vortex, Boo String, Zeiss Z-Point --Phoenix, Boo String, Zeiss Z-Point.