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Sinclair International .22-250 Ackley Improved/6mm 40 deg Shoulder Bump Gauge Insert
In StockSave 12%

Caliber

22-250 rem

Type

parts

Last Seen

May 20, 2026

Sinclair International .22-250 Ackley Improved/6mm 40 deg Shoulder Bump Gauge Insert

Sold byPalmetto State ArmoryPosted May 18, 2026

$8.79

$9.99

You save $1.20 (12% off)

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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 gages provide a more accurate and easily accessible measurement by referencing the shoulder of the case, allowing you to determine the exact amount of sizing applied to your cases. For bolt-