Ben l Taylor

I know this may seems strange but when unloading your rushes how do you get it out the mag? Is it simply a case of cutting the stock close to the throat on the take up side? This then creating a short end or waste with whatever is left on the feed side? I’ve seen loads of videos on loading but none of how to actually get stock out again! if it makes a difference with cameras, I’m asking in regards to a 435 and 416. Thanks, Ben