They are OK with the original Sterling design ejector installed. They are about as positive as the RFI 2A/2A1 without it. The action of the extractor, providing it has a good spring will hold the fired casing on the inside wall of the body until it's tipped out by the left rear feed lip but it's not ejection. The Enfield pattern magazines with the built on ejector are so much better. The Sterling mags are OK for bench rest shooting.