I shoot this stuff in 5.56mm, 7.62mm, 9mm and 45ACP. It's loaded by Winchester. The rifle calibers are typically headstamped with NATO circle-cross. I think it's good value for plinking ammo. I used to be able to buy 5.56 and 7.62 at gun shows for $3.75 and $7.00 per box respectively. Such is not the case anymore, unfortunately.