2/ Lunar orbital velocity is 3758 m/hr https://www.quora.com/How-fast-must-an-object-be-moving-to-orbit-the-moon-at-elevation-of-say-1-2-miles-above-surface … = 4045 ft/s AR-15 muzzle velocity = 3,300 ft/s need something faster
1/ Well, sure. ...and you can theoretically do it here on Earth too.https://twitter.com/qikipedia/status/851857701097398274 …
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3/ .220 Swift might do it. ...barely. https://en.wikipedia.org/wiki/.220_Swift
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