&gt; Of course, all that goes away in the case of subsonic rounds.<p>I&#x27;m pretty sure that presents a problem. Many handgun rounds have subsonic muzzle velocities, and most are subsonic within 50 feet. And according to the FBI&#x27;s Uniform Crime Reports[1], almost half of all murders are committed with handguns. Rifles are used in around 2-3%. (For comparison, 5-6% of murders are committed with bare hands.) Those numbers underestimate the ratio of rounds fired by handguns vs rifles, as being shot with a rifle is far more likely to result in death than being shot with a handgun. If the victim doesn&#x27;t die, they won&#x27;t show up in those FBI stats.<p>1. FBI Uniform Crime Report on murder weapon type: <a href="https:&#x2F;&#x2F;www.fbi.gov&#x2F;about-us&#x2F;cjis&#x2F;ucr&#x2F;crime-in-the-u.s&#x2F;2013&#x2F;crime-in-the-u.s.-2013&#x2F;offenses-known-to-law-enforcement&#x2F;expanded-homicide&#x2F;expanded_homicide_data_table_8_murder_victims_by_weapon_2009-2013.xls" rel="nofollow">https:&#x2F;&#x2F;www.fbi.gov&#x2F;about-us&#x2F;cjis&#x2F;ucr&#x2F;crime-in-the-u.s&#x2F;2013&#x2F;...</a>