Ammunition options vary widely with .223 Rem. Ammo is available loaded with varmint bullets or bullets that will work on deer. You can even get both loaded with green—environmentally friendly—bullets like these.
Bullets for the .223 Rem. can vary in weight and length. Shown here are Nosler's 35-grain Lead Free bullet and Berger's half-inch longer, 82-grain Target bullet. The Nosler will work with a 1 in 14 twist; the Berger needs a 1 in 8 twist.
Some .223 ammunition is specifically designed for tactical applications like shooting through auto glass. This Winchester Ranger load uses the Winchester 64-grain Power Point bullet, which also works great for deer.