Pro-Shot 338 Caliber Bronze Chamber Brush

Chambers collect brass shavings, carbon and unburned powder that a bore brush never touches on its way past. A chamber brush is short and fat by design so it scrubs that area directly, and this one runs bronze bristles on a brass core, both softer than the chamber walls they clean.

The looped end keeps loose wire away from the neck and shoulder area. A standard 8-32 thread fits common rods and handles, and the heavy fill holds its shape through repeated passes, which matters if the rifle gets cleaned after every string at a match rather than once a season.