Leather sealsSome airguns are bound to have leather seals, and the older they are the more likely leather becomes. Leather piston and breech seals need lots of frequent oiling. Many of the older guns are also lower-powered, so the oil can be petroleum-based, if you like. For a gun with a leather piston seal, I would oil the seal every time you shoot the gun if you only shoot it occasionally, or once every two weeks if you shoot all the time. Drop 5-10 drops of oil down the air transfer port and allow it time to soak into the leather. Then cock and uncock the gun without firing, if you can, to make the seal flexible. Often, you can hear the seal go squish when you do this.
OH... one more thing... the breech seal is synthetic, not leather, so it may have been replaced at some point?Just found this from Tom GaylordQuoteLeather sealsSome airguns are bound to have leather seals, and the older they are the more likely leather becomes. Leather piston and breech seals need lots of frequent oiling. Many of the older guns are also lower-powered, so the oil can be petroleum-based, if you like. For a gun with a leather piston seal, I would oil the seal every time you shoot the gun if you only shoot it occasionally, or once every two weeks if you shoot all the time. Drop 5-10 drops of oil down the air transfer port and allow it time to soak into the leather. Then cock and uncock the gun without firing, if you can, to make the seal flexible. Often, you can hear the seal go squish when you do this.
OH BTW the H&N sports were the ticket!!