If the discs will be stored in a sealed container where you must be there when the container is sealed and to break the seal when the container has arrived in Italy, I can't see any issue with bringing in your copies. However, if they are shipped in containers or boxes where they can be accessed or seen during any part of the journey, I would suggest taking extra care in how you pack them. For example, if you pack your originals along with the matching copies, anyone who sees these would be less suspicious than if they saw a spindle or box of copied discs on their own, not realising that the originals are packed in a separate box.

If you plan shipping anything by post, I would strongly recommend not sending any copies through the mail, as I have already heard of a few cases where packages containing copied discs were seized by customs here in Ireland, usually as a result of someone placing an eBay order for a movie / TV show series and the item being sold turning out to be pirated content.