In the photo below you can see the typical ogive of a Winchester .45acp metal piercing bullet on the left, the case is headstamped SUPER-X 45 AUTO. On the right however is a case stamped WESTERN .45 AUTO with a metal piercing bullet having a much different angle. I have never seen this before in a Winchester metal piercing bullet for .45 auto, and even the Remington / Peters metal-penetrating version doesn’t have an angle this triangular. Could this be a prototype or rare variation? It was in the Woodin lab, and the index card just reference all of the metal piercing loads from Winchester in the drawer with different ID letters without expanded explanation for this specific one.