I mentioned this on another thread. This morning I am on a real computer and can post the link.
If you use a tank, this will estimate how many refills you get from your tank based on your maximum and minimum fill pressures and the size of your guns tube.
https://www.airgunsofarizona.com/Tanks/FillCalc.html
I have a 65cc tube on the Daystate and fill every 20 shots. It worked out to over 200 fills based on the pressures I run.
BTW, I am purchasing an externally adjustable regulator as I made the "mistake" of buying an unregulated gun. With that gizmo attached between the tank and the gun, I will have the same pressure on every shot and get more consistent velocities. It will give me another variable to play with as I will be able to see if there is a velocity node where the gun shoots best. As an added bonus, I will not need to stop to fill the gun and I will not lose air every time I disconnect the air supply. Most of my shooting is off the bench and having the gun tethered to the tank is not a problem.
This is the unit I am looking at currently:
https://www.airgunsofarizona.com/reg...rated-fillset/
If anyone has used one, I would appreciate comments.