Reply To: FWB 300 facelift posts ..Pics

Forums Springers, Pumpers, C02, & Vintage FWB 300 facelift posts ..Pics Reply To: FWB 300 facelift posts ..Pics

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Jonnes,
I have some experience with these…Joe is correct about the moly lube..only the slightest film on piston and chamber…I include the spring itself and the spring guides…the slightest film only….Also a new piston ring can cause low velocity till it wears in…if the old one is not broken you may find it works best and for a very very long time….a new breech seal may need the factory shim behind it to seal properly…you should feel some resistance just as the action closes making a tight seal…very loose on closing could indicate a poor seal. Also if the piston bumper did not seat completely (because of old bumper debri) or a tight fit it needs to be seated completely or velocity will be low…otherwise your new parts should have brought you up to at least 580fps..