Sinclair International .22-250 Remington/.223 WSSM/.243 WSSM/6.5mm 28 deg Shoulder Bump Gauge Insert

Unlike traditional methods that measure to the datum line, Sinclair bump gauges offer a more accurate and user-friendly approach. By referencing the shoulder of the case, these gauges allow you to determine the exact amount of sizing applied to your cases. This precision ensures that your reloading process is both efficient and effective.