This .25 caliber brass jag is sized for the .257" groove diameter shared by .25-06 Remington, .257 Roberts, and .250 Savage. The pointed brass tip centers a cleaning patch inside the bore and applies consistent pressure against the rifling grooves. Because brass is softer than barrel steel, the jag passes through without leaving marks. Note: 6.5mm cartridges like 6.5 Creedmoor use a larger 0.264" groove diameter and require a dedicated 6.5mm jag - this .25 cal jag is not a substitute.
The .25-06 remains a favorite flat-shooting deer round across the western states, and the .257 Roberts has a loyal following among handloaders who appreciate its mild recoil. Both cartridges drive bullets at high velocities that deposit copper fouling deep in the rifling. A gun cleaning jag pushes solvent-soaked patches hard enough against the bore walls to reach fouling that a loose-fitting slotted tip simply slides past.
Pair this jag with 1.5" square patches for bore cleaning - that size wraps cleanly around the tip without bunching. Serious shooters use a jag for every step: solvent application, scrubbing passes between brush cycles, dry patches to check progress, and a final oiled patch for storage. If you shoot .25-06 or .257 Roberts, this is the gun cleaning tool that keeps your precision bore performing.