The Dillon Primer System Early Warning Kit (Dillon part number 20302) is compatible with Dillon’s automatic priming systems, specifically designed for the XL650 and XL750 reloading presses, will also work with the RL 550. It’s an easy-to-install attachment that helps reloaders focus on other aspects of the reloading process by providing an early warning if a primer is not properly seated. 

Allows you to focus on loading instead of worrying about failing to seat a primer, and is an easy slip-on attachment to the auto prime system.

Part #: 20302