I got a used RCBS primer tool with some reloading stuff also included was Lee shell holders would not seat the primer all the way. I just thought I needed RCBS shell holders. The Lee holders work fine in the RCBS press, may be I did something wrong.
According to Sinclair's latest catalog, the RCBS priming tool works best with RCBS shell holders. That being said, I bought a Lee set of shellholders and they work with my RCBS Junior press.
40 S&W, SPP,All ready learned my lesson with the military brass. Will not seat all the way, had Lee primer tool used it. Will try RCBS tool again at some point. Lee shell holders work fine in the Rock Chucker press.