Hornady Critical Defense .223 Remington Ammunition is a dependable rifle self-defense round that includes the FTX bullet with hollow point polymer tip for maximal ballistic performance and controlled expansion. Additionally, this ammo's unique design allows it to feed reliably in rifles. This 55 grain round with Flex Tip eXpanding bullet is unaffected by thick heavy clothing or hide, providing reliable protection when defending your home from an intruder or your ranch from coyotes.