I have had a RCBS automatic priming tool for years. Since loading on a 550B the RCBS tool is used less. This machine is reliable and you do have a feel seating the primer. There are several pieces on the RCBS automatic priming tool on YouTube. There was a smaller bench mounted non-automatic primer tool from RCBS. That priming device is my favorite. It's been discontinued. I long ago retired by Lee's.
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