Anyone recognise this bit of kit ? Made by Prime Reloading, as you can see has a main body with a spring loaded plunger which to me looks like a powder/charge dispenser, screw in measures one marked 9mm, and shell holders for different cases. Quality piece of kit main parts solid brass and the individual measures aluminium. I've never seen one of these before and wondered if any of you guys can give me any info on it ? Pictures below.

https://flic.kr/p/2aPcJa6
https://flic.kr/p/29rtwSE
https://flic.kr/p/29rtxVm
https://flic.kr/p/2aPcHmx