A bullet puller is a device to help remove a bullet from a round. You stick the bullet in the hole and start levering with the case unil the bullet comes loose. With a .223 rifle round you will get gunpowder in the vicinity of 30 grs.
If you want to buy something like that, you might try sharpeners for bigger pencils or a cone shaper for arrows with wooden shafts. Thatīs much cheaper even if you need to buy and glue on a ferrocerium rod.
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If it isnīt broken, it doesnīt have enough features yet.