During the golden age of wildcatting, experimenters had only to look to .30/06 and belted magnum cases for inspiration. Hence, the 6.5/06 in its many incarnations and serious barrel scorchers such as the 6.5-300 WWH, which is the .300 Weatherby necked down to .26 caliber. But those days are pretty well past, with current thinking focused on accuracy as well as velocity, especially the "fat-and-short" case concept. This is why the rotund and conspicuously beltless .404 Jeffery case has been the mother of several new caliber configurations of late. (Usually by simply shortening and necking down to a variety of calibers.) In other words, the .404's greater body girth yields greater propellant capacity than a standard H&H-type; belted case of the same length, or, considered another way, equal capacity in a shorter form.