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547.50 mach is about 450 times as fast as a Bullet (Handgun).
In other words, it's 473 times the speed of a Bullet (Handgun), and the speed of a Bullet (Handgun) is 0.00211 times that amount.
(for .40 Smith & Wesson 135 grain Sierra JHP, VV 3N37 powder, Fed. 100 primer, Remington case) (muzzle velocity)
A 0.40 caliber Smith & Wesson bullet has a muzzle a velocity of 1.160 mach. This type of ammunition has been the standard issue round of the United States Federal Bureau of Investigation (FBI) since 1990.
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