Unknown tool?

Looks like a powder metering assembly of some sort.

If no one know what it is don't throw it away. Take it to the next gun show. You should be able to sell it for enough to pay for admission and parking.

its from a powder measure. Pacific/Hornady maybe?
There was 2 sizes with them. one for small loads ie pistol and one for larger rifle loads.

It is a micrometer for measuring something. That something would be easier to tell with a pic of the end you haven't shown us. If it is hollow and the the thicker black part is threaded on the outside it may well be a micrometer based seating die.



ETA: Seeing the responses above now I would agree that it is part of a powder measure.

It's a powder metering assembly from a powder measure. It looks similar to my Redding measures.

Hope this helps.

Fred

It's a laptop computer -- you can see the keyboard in the upper part of the picture.

(the others are correct -- it's the meterng chamber for a powder measure.)

Micrometer from a hornady powder measure. they usually come with 2, 1 large and 1 small.

It's a laptop computer -- you can see the keyboard in the upper part of the picture.

Click to expand...

+1

Older seating die micrometer.

http://www.midwayusa.com/viewProduct/?productNumber=394708

Kingcreek said:

its from a powder measure. Pacific/Hornady maybe?
There was 2 sizes with them. one for small loads ie pistol and one for larger rifle loads.

Click to expand...

We have a winner!

If the end of the piston can be pulled back off the guide rod to expose only the smaller rod , it is a metering rod from a RCBS Duo-Measure that has been dis-continued for several years.

From a Pacific measure: