Ammunition with Energy Absorbing Features

A multi-piece ammunition article comprising:

• A base having a first end and a second end wherein the first end is configured to receive a primer and wherein the second end is open and is configured to cooperatively engage with a caselet;
• the caselet portion further comprises an elongated body with an outer surface and defining an inner cavity wherein the caselet further comprises a base end and a projectile end,
• wherein the base end is oppositely configured to cooperatively engage with the open end of the base portion such that an overlap region is formed thereby forming a smooth transition between the base portion and the caselet portion, and
• wherein the outer surface of the caselet portion is configured with a contoured surface such that the outer surface is configured to be uneven.