I've owned three sporterised Mauser '98's ( two FN ) a BRNO ZKK601 and an American CZ550 in .308.

The sporterised mausers would not close on a single round fed into the breech. They also grabbed the round under the extractor as it 'popped' up and out of the magazine well and before moving it forward to chamber. To me, this is controlled feed.

I can't remember what the ZKK did.

My CZ550 has the detachable box magazine and will close on a single round fed by hand into the chamber. As stated in earlier posts, the round from the magazine does not slip under the extractor claw until it is totally pushed forward out of the magazine and is central to the bore and half way into the chamber.

I would like to know what the non-detachable magazine Cz's do ? I consider my CZ more a controlled extraction than controlled feed.