[Man from Oz]

I have a Benjamin Discovery. I wish the gun would hold its air. I have found that over a period of a couple of days, it will gradually lose its charge.

It takes @ 75 pumps to get it into the upper green “safe” range. I guess I get some good CV exercise every time I need to pump it up.

[Hot Tabasco]

I wish the gun would hold its air. I have found that over a period of a couple of days, it will gradually lose its charge.

It shouldn't be losing air. You obviously have a bad "O Ring" seal leak which can easily be replaced once you find the leak.

Benjamin Discovery losing pressure

Or try this one......

Discovery losing air pressure