If you want to break in a new barrel without breaking the bank, Wolf® Gold is the right call. If you want to take your family out for a day of shooting without spending a fortune, Wolf Gold is the right call. For practice, close-range drills, 3-gun events and more, you won't find a better value. "M193" is the designation given to standard ball ammo designed for field use with the M16A1 rifle.
PLEASE NOTE: While the 5.56x45mm NATO round will fit in a .223 Remington chamber, 5.56 NATO is a military round that runs at higher pressure than its .223 counterpart, and is therefore not recommended for use in a rifle chambered for .223 Remington.