Sorting through my collection of top punches I have gotten over the years, can't figure one out. I was making up an excel table so I know what I have without digging through the box.

I have an RCBS 530 top punch. My guess is it's around a 7mm. It's discontinued, and searching hasn't turned up anything other than a French website showing it's a 7mm/284 and that's about it.

An no I don't want to sell it. I'm thinking it might be useful for me down the road.

Jason