Here is what I found. No where does it indicate "armor piercing".
Winchester Bullets 5.56mm (224 Diameter) 62 Grain Open Tip Match
Product #326584Winchester # E129958
“……Winchester’s 62 Grain Open Tip Match bullet was designed as a barrier defeating bullet to be loaded in their FBI contracted round………..”
Know nothing about handgun/rifle applications. Somebody here is bound to know.
Armor-piercing ammunition, sometimes referred to as metal-piercing ammunition, is ammunition that is designed primarily to penetrate metal or armor, including body armor commonly worn by police officers. Under federal law, armor-piercing ammunition is defined as any projectile or projectile core that may be used in a handgun and that is constructed entirely from one or a combination of tungsten alloys, steel, iron, brass, bronze, beryllium copper, or depleted uranium.[SUP]15[/SUP] In addition, armor-piercing ammunition is defined as a full jacketed projectile “larger than .22 caliber designed and intended for use in a handgun and whose jacket has a weight of more than 25 percent of the total weight of the projectile.”