RIMFIRE

Rimfire covers cartridges that use a priming compound distributed within the rim of the case rather than a separate primer, a system that has been central to small caliber ammunition since the mid nineteenth century. This category spans a wide range of calibers and formats, from early and obsolete rimfire designs to widely used sporting rounds, and includes variations intended for target shooting, training, hunting, gallery use, and specialized applications. Rimfire ammunition played a critical role in the development of affordable, low recoil firearms and became a foundation for civilian marksmanship, youth training, and small game hunting worldwide.

Material in this category includes live cartridges, blanks, dummies, experimental loads, wildcats, specialty projectiles, and boxed material across many manufacturers and periods. Variations in case length, bullet shape, lubrication, plating, priming style, headstamps, and packaging illustrate how rimfire technology was adapted to different performance goals and markets. Less common rimfire types, transitional designs, and discontinued loadings appear alongside familiar standards, reflecting both continuity and experimentation within the rimfire system.

From a collector and research perspective, rimfire ammunition offers one of the richest areas for comparative study due to its long production history, global adoption, and sheer diversity of variants. Differences that may appear subtle, such as rim thickness, bullet profile, case finish, or box labeling, often carry important historical and manufacturing significance. As a result, rimfire cartridges are essential reference material for documenting technological evolution, manufacturer practices, and the full breadth of small caliber ammunition development.