The Sinclair International SS bump gauge insert is a stainless steel replacement/selection insert used with Sinclair bump gauge tooling to check and verify case shoulder position change when setting up reloading dies for cartridges in the 35/284 family through WSM cases up to 338.
Key Features
Stainless steel construction for durability and consistent gauge performance
Cartridge-specific insert fit for the 35/284 family and WSM cases through 338
Made to be used with Sinclair bump gauge setups to help you dial in sizing and shoulder bump consistently
Choose the correct insert for your cartridge family and use it with your Sinclair bump gauge for repeatable shoulder bump checks.
