https://www.isegoria.net/2022/01/25-psi-was-all-it-took-to-accelerate-a-4-lb-projectile-to-190-fps/ From the ancient Greek for equality in freedom of speech; an eclectic mix of thoughts, large and small Thu, 28 May 2026 20:49:01 +0000 hourly 1 http://wordpress.org/?v=3.6.1 https://www.isegoria.net/2022/01/25-psi-was-all-it-took-to-accelerate-a-4-lb-projectile-to-190-fps/comment-page-1/#comment-3502329 Dave Sun, 30 Jan 2022 22:03:19 +0000 https://www.isegoria.net/?p=48614#comment-3502329 The velocity of a .45 ACP round, used in the 1911 Army, is about 830 feet per second. With hollow point bullets, it is very lethal. Double the pressure in the air rifle to 1500 psi and the same velocity can be obtained in a 16-inch barrel, the same barrel length as the standard M4 carbine. A standard scuba tank has a pressure of 3000 psi, providing a large air supply through a flexible hose. Replace the cone in a fully-automatic paintball gun used to hold the ammo with two flat plates separated by the length of the hollow point, and you would have a relatively quiet 45 caliber machine gun capable of firing far more rounds without reloading than a WWII M3 machine gun. Who needs a 3D printer for mayhem?

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