It sound as tho the trigger is shot. what Psi are you running? 70-80psi plus don't over oil just one to two drops is all it needs. you cant compress a liquid so the next thing to go is the rubber seals. Had this problem with some of my guns until I found out that they were over oiled by the men.. and also make sure you drain the compressor often to remove the water that accumulates in the tank . A water separator would be a good investment. BOB
Trigger is fine. While buletbob does bring up very good points with regards to over oiling, proper psi, and in line filtration I don't believe that to be your problem. This symptom is not uncommon to the passload framer you have. It is addressed in the trouble shooting section of the owners manual.