Ray I bought one a few months back, but I went on vacation the day after it came in and cant remember where I put it, old age hits again.
But I do have one on my QB so I know just how they would work on the Disco. Like Triry said, they work great, only draw back is its not autoindexing like some other guns . it take some geting use to, but having eight shots rather than loading one at a time, the self indexing gets easier the more you shoot.
Pellets , most will work, but I like shooting preditors out of my Disco, more accurate for pest control, so that is just a small setback. Now my QB likes RWS super points and they do index good out of them.
Buy the bolt when you get the RIM, IIRC only 10 extra, it makes loading easier.