No-one has mentioned reloading yet. There are a huge number of JHP bullets available for .45 ACP. Have a look around the reloading section at
I would suggest either the Remingtom Golden Sabers, or Hornady XTP's. For general practice fodder, check the Rainier plated bullets. I've fired thousands of them from my Glocks, and they are fine bullets that don't foul the bore.
I suggest that you keep plenty of your defense rounds loaded up and stored, but also keep a lot more of your "general use" loads. They may not be as potent as your defense rounds, but in a worst case scenario, any ammo is better than a sharp stick!