Drill bits are meant to slide up and down within the chuck. In my new drill there's about 2mm of in/out movement in the chuck. (There's about 1cm if movement from the whole chuck, but I don't think that's where the movement is meant to come from.)
I haven't tested it yet, but as I don't know what to reasonably expect from an SDS drill I wouldn't know what OK or good drill performance would look like.
Should I send it back to the shop?