Different bullet types. Rifle ammunition on top and below it is pistol ammo.
Ultimate survival guide and how to treat different wounds including gunshots, burns, dislocations. In addition, it will also tell you how to secure resources and etc.
This covers from simple scrapes and cuts to things like broken backs, amputations, and other wounds.
Different caliber bullet entry and exit wounds from handguns. These are also most likely standard issue round exit wounds, not hallow point or any other specialize ammunition type.
Subject: References for writing