Honestly, you may want to look at getting another airgun. The 760 Powermaster is good for starters but after owning two of them I found it just isn't accurate at all. A couple years ago I bought this nice breakbarrel made by Marksman that is insanely accurate out to 90 yards or so, and it only cost about $75 if I remember right. This is a similar model made by Gamo although mine is about 700fps...
I also have the 1000fps Gamo Shadow but it isn't as accurate for some reason. With the big 10.5grain pellets it'll smack 2 liter bottles hard. Very satisfying.
Oh, and he may like just breaking the barrel once vs. pumping up several times.