Probably the most popular caliber firearm in most of the world. Many of us have more than one. They also are very collectible and still cheap to shoot. (The military trainer posts have been added here from a previous forum.)
This rifle belongs to my local rifle club. It was donated by a former member. It is a Tyrol 5522. It is a semi auto but can also be used as a bolt action by locking the bolt down in the slot. It is no match rifle but is good for a bit of casual plinking.