What is it [4]?

[Land Owner]

From the estate of a 30-06 Springfield reloader:

https://i.postimg.cc/C5TNPh6q/IMG-1440.jpg

https://i.postimg.cc/G2sKx8zR/IMG-1441.jpg

[Der Gebirgsjager]

Another lube machine cap?

DG

[wv109323]

My guess is a Dan Wesson barrel nut tightening/removing. I never seen one like this but the spanner measures about right for my .357 DW wrench. The one I have is a T handle. The later barrels used a spanner instead of a star ahaped nut. It may be for a .44 mag, it depends on diameter of the plug.

[fgd135]

Looks like a base plug for a bullet mould.

[Pressman]

My guess is a Dan Wesson barrel nut tightening/removing. I never seen one like this but the spanner measures about right for my .357 DW wrench. The one I have is a T handle. The later barrels used a spanner instead of a star shaped nut. It may be for a .44 mag, it depends on diameter of the plug.

This is likely the correct answer. The newer DW's had an issue with the barrel nut getting semi-frozen in place and the factory tool was nearly useless to break them loose. This would be an after market tool.

[Land Owner]

Yes. I believe wv109323, that you are correct. I searched on line and saw a similar tool that inserts into the DW model. I will drag it out tomorrow, put the calipers to the cylinder, and report finding.