Originally Posted by Conor
Why 50 bar, the regulator is set for 85bar so you would have to dump the rest of the air?
Just finish your practice session when it's time to refill the cylinder ie just below 100 bar.
I never fill at the end of the practice session but some times when I fill at the middle it goes home with more than 150bar, so this is the reason for the question empty or leave it alone.
I have a new rifle that bring a piece to empty the cylinder, maybe it's to travel or not.
50 bar a value that put little stress on the springs and in the cylinder material.