http://bulletin.accurateshooter.com...ultimate-varmint-cartridge-with-mach-5-speed/Actually, they are real rounds, though some inert ones are being sold on the innerwebs. They one on the right is called the 17 Incenerator Improved. To launch them requires a polygonal barrel, and the bullets are solids. There is an article in Accurate Shooter about the project.
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