I do not shoot corrosive ammo either, but chrome greatly extends barrel life, ESPECIALLY if you shoot Russian ammo, with steel jackets. Yes, steel in bullets is softer than barrel steel, but water wears out rocks too.
From what I understand though, the nitride treatments are actually better than chrome for extending barrel life across the board, both in terms of wear and corrosion.
The only negative I've heard about these so far is that the high temps required to apply them mean you have to be careful not to actually weaken the part. No problem for a company that knows what it's doing, but I would be leery about a bargain basement 'nitrided' part.