The 4th Edition has 968 pages divided into nearly 100 chapters and contains over 500 listings for current and obsolete handgun, rifle, and shotgun cartridges since the mid-1800s including detailed information, specifications, and measurements on rimfire, centerfire, and shotshell cartridges. The most important new feature is the addition of an all new 8-page color section, along with the industry's newest, hottest cartridges. Many sections have also been updated with additional information, charts and images.