Sinclair International .300 Remington Ultra Magnum 30 deg Shoulder Bump Gauge Insert

Sinclair bump gauge inserts are designed to measure the shoulder bump when configuring full-length sizing dies. These bump gauges can be installed in either of our comparator bodies and are precisely machined to accommodate specific shoulder angles of cartridges. Instead of measuring to the datum line, these gauges provide an indication from the shoulder of the case, offering a more accurate and easily accessible measurement of the extent to which you are sizing your cases. We typically recommen