Sinclair International .17 Remington/5.56x45mm 23 deg Shoulder Bump Gauge Insert

Overview

The Sinclair International #23 Shoulder Bump Gauge Insert is a precision tool designed for reloaders to measure shoulder bump when setting up full-length sizing dies. By indicating off the shoulder of the case rather than the datum line, it provides an accurate and consistent measurement to ensure optimal chamber fit. This insert is compatible with .17 Remington, .223 Remington, and .22 Remington cartridges and is designed for use with Sinclair comparator bodies. Made in the USA, this tool is well-suited for bolt-action and AR-15 platform rifle reloading.

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