These designations refer to specific cartridge types used in firearms. One is a rimless, straight-walled pistol cartridge commonly used in small, concealed carry handguns. The other is a rimmed, straight-walled revolver cartridge known for its manageable recoil and stopping power. Often, they are compared due to similar ballistic performance and intended uses in personal defense.
Choosing the appropriate cartridge involves considerations such as firearm platform compatibility, individual recoil sensitivity, and desired terminal ballistics. The widespread adoption of these cartridges highlights their effectiveness and continued relevance in civilian, law enforcement, and security applications. Their history reflects evolving firearm technology and the ongoing pursuit of effective self-defense solutions.