What type/kind of chamber reamer is this?

[Shawnba67]

I found a bunch of these for sale, seller knows nothing about them beyond the markings. Im pretty curious what they are. I think they are for a resize die but not sure. Some of them do not even have a neck portion. Above is listed as 30/30.

 

[bapayton]

I read one time where using up to 3 reamers for a chamber was somewhat common, how common I can't say. Think there were separate body/shoulder, neck and then throat reamers. Guess those were for the serious wildcatters or maybe it was for flexibility reasons. Certainly seems like there would be many more chances for chamber inconsistencies.

You could be right as well. Just wanted to share my initial thoughts.

Fyi....I've got my eye on the 300 win mag reamer of the same style.

 

[spitfire_er]

I've got a roughing reamer for 223 that looks like that.

 

[Ggmac]

Only the original purchaser and the manufacturer really know , but I'm sure you could make it work for something .