It all depends on what youre doing and trying to accomplish. If youre shooting 50 rounds a week in slow fire bulls eye, it might be, although even there, I would probably say no. If your trying to keep up on multiple things, no, Id say not. 50 rounds in total really isnt much if you think about it.
Dry fire is a great help as well, and in all the different disciplines, but live fire is still necessary. I dry fire multiple guns every day. Some simple sight alignment and trigger break exercises, others, presentations from different positions and holsters. You can work on pretty much everything, but live fire provides confirmation, and also allows practice that dry fire simply cant.