JSB 18.1 5.53 Enjoy your new toy
I wouldn't stock up just yet, you may be listing them in the Classifieds....Best thing you can do is try a bunch of different pellet shapes and weights you never know what each gun is going to like, my FDPCP Loves 14.3 Benji's and CPHP's, but hates the RWS 14.2. I just bought a tin of the JSB 18.3 to give them a try waiting for them to arrive from PA...
I would pick up some crosman ultra magnum domes 14.3 gr too. They're cheap and if the gun is not shooting too hot they are surprisingly accurate. The 22 long shoots a little too hot but the short should be fine. Even in the long they're very accurate out to 30-40 yards. In my Sumatra at the lowest power setting they go between 850-900 fps and they're every bit as accurate as the JSB 18 gr pellets. Did you see Jim Chapman's review?