What is 22-250?

Twenty two two fifty Is a rifle calibre. Known as “the calibre of kings”. It’s named thus due to the speed of the bullet, its accuracy and the destruction wrought on the target esp. when using vermin/v-max or expanding ammo. It is unlikely to go through a brick wall but is devestatng on flesh and for this reason is the calibre of choice for many police force snipers.