Smith & Wesson 625 One of the few revolvers chambered in .45 ACP. Taurus also released a Tracker model in .45 ACP. Since the .45 ACP market is dominated by semi-auto handguns like the 1911, the variety of revolver choices is slim. Alternatively, the same can be said for semi-auto handguns chambered in large magnum calibers being very limited in comparison. Still nice to have if you already got a lot a .45 ACP collection.