Many exist. However, the media rarely EVER reports on self defense gun uses by private citizens. And when they do, they do not go into the tech details of the firearms used. However, all handguns sold today come with standard capacity magazines. The vast majority of those magazines hold more than 10 rounds, with some holding as many 17 or so. Depending on the design of the gun, it may not hold more then 10. My 2 .45's only hold 7. But if you read about any police shootings nearly all of those are in defense and most all police have mags that hold more then 10 rounds. The Glock model 19 I used to own carried 17.