Like charger loading, but different.
Instead of the rounds being held in a metal clip and pushed out of the clip and into the magazine, the clip is designed a little differently, and the whole thing is pushed into the magazine, with the ammo still held in the clip. A spring arm pushes the rounds up so that the bolt can chamber them, and once the clip is exhausted, one of two things happens, depending on the actual design:
- as the last round is chambered the clip falls out through a hole in the magazine
- when the bolt is retracted the clip jumps out the top. And then makes a massive 'ping!' noise when it hits the ground, telling every German within a hundred miles that you've got no ammunition left. Clever squaddies used to carry an empty one and drop it on the floor while they were loaded up, and then wait for the enemy to stick his head up to shoot them down.
The disadvantage of this is that you can't top the magazine up with loose rounds - it's a whole clip or nothing. The clips normally hold 5 or 6 rounds in a single line.
There's one self-loading rifle that uses a similar clip system, and uses an 8 round double-stack clip: the M1 Garand.
Such Mannlicher-type clips are sometimes referred to as "en-bloc clips" to better distinguish them from chargers (which are sometimes referred to as "charger clips" or "stripper clips" - see charger loading). The word "clip" on its own refers only to this Mannlicher-type of clip.