FWIW, in metallurgy the term "alloy" merely means that a metal is a "mixture" of two or more metals. "Lead" bullets, like solder, are usually lead with a small addition of another metal like tin or antimony and are thus "lead alloys". All steels are iron with various other materials added to produce specific properties, and are thus referred to by their "alloy" numbers, such as 1020 or 4140. I don't know what the specific composition of the Ruger aluminum frames are but they are always referred to as "alloy" frames as distinguished from steel or even brass, both of which are actually alloys themselves. This seems to be common nomenclature practice in some parts of the gun industry. :mrgreen:
Of some interest is the fact that the Wrangler's grip frame is NOT the usual Ruger aluminum, but a zinc alloy. This is perhaps an alloy that some states do not like . . . lower melt temp, perhaps?