I’ve been documenting myself for a while about the bullet itself and now I’m stuck with this question regarding its components. A bullet can have a metal jacket, a core and a thin metal layer that separates the core from the jacket. Thus, we can have three types of bullets: a one-component bullet (only a solid core), a two-component bullet (a solid core inside a metal jacket that can or cannot feature a filler situated in its forward or rear portion) and three-component bullet (a solid core inside a metal jacket alongside a thin metal layer that separates them).
My question is as follows: is a 5.56 M855/M855A1 a three-component bullet since inside the metal jacket there’s only the steel penetrator and the lead slug (for M855) / steel core that protrudes outside the jacket and a copper plug (for M855A1)?
And I also want to question you guys, a 7.62x39 PS (M43) is definitely a three-component bullet (I’ve seen it with my own eyes), but is 5.45 PS (7N6) (a three-component bullet as well (which I think it is)?
Plus, general speaking, not to be confused about those terms, is “penetrator” a synonym for “core” (as it is in a steel core bullet) and “slug” a synonym for “filler”?
7.62x39 PS (M43) bullet:
5.45x39 PS (7N6) bullet: