Hate to say it, but if it's a duty pistol, it's a common model, and barrels are available at relatively low cost. Eventually, low cost ammo savings buy you a new barrel.

Buy a practice barrel for $150-200, load 'em up, clean it often. It isn't good for you, but hey, either is rum & coke.

I don't shoot it myself, but if you're planning in advance to treat a practice barrel like a two dollar whore, I can respect that strategy.