What is the history behind the Winchester model 67 22 rimfire?

The Winchester model 67, manufactured between 1937 and 1963 is a single-shot, bolt-action, rimfire .22 caliber rifle. The standard model bares a twenty-seven-inch tapered "sporter" barrel. Winchester also offered a "boys" model, with a twenty-five-inch barrel, for youngsters. The model 67 is capable of firing any .22 short, .22 long, or .22 long rifle cartridge. Approximately 383,000 of these popular rifles were produced, with only the later models (after the early 1940's) having serial numbers. The longer barrel of the standard model was a regular feature of most rimfire rifles until the 1960's. The longer barrel length was thought to be advantageous for at least three reasons. First of all, the longer sighting plane between the rear sights and the front sights aided in aiming. Secondly, the longer barrel reduces noise considerable, nearly muting the sound of standard velocity ammunition. Thirdly, before the advent of today's advanced external ballistics, it was commonly believed that a very long barrel was necessary to achieve game-killing velocities.