22 WRF/WMR

.22 WRF / .22 WMR covers Winchester Rim Fire and Winchester Magnum Rim Fire cartridges and closely related developmental and specialty variants. This family represents a separate lineage from .22 Short, Long, and Long Rifle, characterized by larger case dimensions, different bullet diameters, and higher operating performance.

Items in this category include early .22 WRF cartridges, commercial and military .22 WMR loads, blanks, dummies, draw sets, experimental wildcats, and manufacturer-specific variations. Differences in bullet construction, case materials, headstamps, and packaging reflect the technical evolution of magnum rimfire ammunition from the late nineteenth century through modern production. This category is especially useful for collectors studying rimfire caliber divergence, transitional designs, and the development of higher performance small-bore cartridges.