Joe....as a self taught airgun pathogist, I am here by diagnosing you as having contracted an incurable contagious virus based disease. Feinwerkbau-acquisition-disorder...as yet non fatal but if left untreated can result in financial ruin, domestic violence, divorce and social isolation. You appear to be in the early stages of the disease....
Sticken myself, I've had no less 12 FWB branded guns...after some "group" therapy, I struggled, but was able to reduce my lot to a mere 8.
The 601 I bought new in 1985, the 124 I paid $40 for....but the 6 remaining 300/150s is where my disease has been arrested.
You may find that all the 300s shoot equally well, but on rare occasion one will end up shooting in the 720fps range...this does not help with the disease.....also on some still morning your guns may turn in some 3/8in. 50 yd groups...this doesn't help with the disease.
Neglecting all other airguns you may own, even pitying them, is a difinative symptom...
Seek help immediately....or buy another one so the disease can run its course....(btw, nice score)
. She's not much to look at right now but the guy I bought her from is a very good guy and judge of accuracy... She's a winner who needs a face lift and a little TLC . 
. Got the new spring and seals in the gun ...Settled in after about 50 shots ...This group is 15 shots at 25 meters. Shoots stronger and has a nice solid feel now ...Before it felt sloppy just a bit .
. Got her finished today . It shot best with the new single spring . I wish I would have had more of the 7.33 pellets to try . She will be headed to her new home next week
