Undoubtedly, one of the most popular rifles in America is the AR-15, and many of these guns are chambered in or compatible with the .223 Rem. cartridge. Together with the .22-250 Rem., these two cartridges make up several of the most popular sporting rounds in the country, and the Reloading Guide for 223 Remington and 22-250 Remington Calibers offers an opportunity for owners of compatible guns to dial-in their favorite rifles with specially made loads. With more than 1,000 different loads offered for both cartridges, the Reloading Guide for 223 Remington and 22-250 Remington Calibers is a comprehensive resource with materials from most major powder and bullet manufacturers. Mfg: Gun-Guides