Is 22 cal same size as 223 cal?

No, the .22 caliber and .223 caliber are not the same size. The .22 caliber typically refers to a variety of smaller cartridges, such as the .22 Long Rifle, which has a bullet diameter of approximately 0.22 inches. In contrast, the .223 Remington has a larger bullet diameter of about 0.224 inches and is designed for different applications, primarily as a centerfire rifle cartridge. Thus, while they share a similar name, they are distinct in size and use.