If an older rifle with hardened valve stem seat, I keep a few drops of PELLGUN OIL in the CO2 gas chamber to help all the seals (O rings as well). However I have had to turn some older hardened valve stems in a lathe (Unimat) to true the seat to make it hold. This seems to give slightly better performance if the valve stem seat material isn’t too decayed from age or improper lubes having been used in it’s life.
Newer CO2 guns have soft seats and may fare better if left not charged/under pressure. The seat material can ‘take a set’ or permanent groove if charged for long periods of time (weeks or months).
However today’s urethane materials will last longer than what was used a few dozen years ago.
Last edited by Alaninga; 08/28/21.
