I just got my pbba pro 20. It comes with a 200cc air tank and fill 3200-3500 psi. Mr terry is very helpful. Awsome gun. Not sure how big the loads are for the wing shot, but you can shoot 2oz shot #6 no problem 30 yards. The gun is tuned for 1 oz but you can get 2 in the reloadable shells. I do wish it had a pressure guage. And a pic rail instead of 3/8 dovetail. I wanted to put a red dot but with a adapter it makes it a little high for fast acquisition. I also wish the chock used a more available choke thread like a Remington choke. You can get chokes from tru lock and they have a good solection. Not of the big brands user the tru choke system. I got the full choke that comes with it and bought turkey, x full, modified, cylinder, and gona get a few more. I love my pro 20. O yeah 3 shots per fill with 1200psi remaining