Why an Italian 8-inch/96 gun was rejected

Why was the Italian 8-inch/96-caliber gun rejected?

Because barrel wear would be unmanageable even if the long weapon could be designed.

The question comes from an 8-inch/96 weapon associated with La Spezia in World of Warships. Its unusually long barrel initially prompts doubt about whether the designation has been remembered correctly. An Ansaldo study explored the possibility of such a weapon in the 1930s. Barrel wear is given as the reason it would not become a practical gun. The comparison with Iowa-class guns concerns the extraordinary barrel length, with the dimensional and weight comparison expressed tentatively.