The bee, zipper and hornet were all based on obsolete black powder cartridges, the 25 20, the 25 35 and the 22 wcf. All were developed in the late 20 and 30s. They had a brief period of fame, being rimmed when single shot or lever actions were all the rage and the zipper actually outperformed the .222.
Only the hornet survives and seems to be growing in popularity
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