You could tune the rifle to get 3 to 5 good shots at what ever pressure your comfortable pumping to.
Yes there is a foster fill nipple on the side. I use that to fill when I'm doing chrono work. This is not a gun you want to pump all day long. I also fill from my floor pump if I'm not home with my tank. From dead empty to 2000psi it takes about 30 pump strokes with my fx 4 stage pump