HMmm - a clip is a strip of metal that holds rounds together to insert into a gun. A magazine "stores" rounds. That is the way I describe them along with visuals to shooting students.
But to this news magazine (can we call it a clip magazine?) and to all in the lame stream media they don't differentiate between clips and magazines. To cover bases they often write "magazine clips!" - thus combining the two terms. Don't you love the uneducated??