Gamo NP Ram leaking?

I shoot gas pistons in most all my rifles. I’ve rebuilt a few. From what I see of the piston construction I doubt you could have a temporary leak without further problems. If you aren’t loading any FPS you are probably all good…IMHO. Stay well👍🇺🇸😉
Is a mystery to me. I have been experimenting with the actual piston, made a new one. Since trying some new mods, ended up hitting the bottom of the ram. And even bottomed the piston on the top of the ram main body. The new piston is in, so I don't know if i lost some fps. Only way to find out is replacing the factory piston.