I will bed it in with at least 500 shots before I do anything unless it starts to twang, then it will be opened up, if need be ! Spring ends will get polished, probably change the piston seal, a bit tweaking & honing, relubed & tried again, I did chrono it upon purchase with jsb15,89 it was just over 10.2 & consistant for the 5 shots I tested it over