Thankfully this thing has swage die on it or i would have no idea

[.357]

Please help me figure out what this thing is I have no idea! and you guys love to mash things so help a brother out.
It says "holly wood gun shot Swage die"
http://img441.imageshack.us/img441/3563/dsc0111or.jpg

http://img526.imageshack.us/img526/2471/dsc0112w.jpg
It's clearly got a spring in it.

http://img148.imageshack.us/img148/4169/dsc0113uf.jpg
Hole inside measures .278

Any ideas? I have no idea where this thing came from found it in my mold box. Odd usually i'm slightly more organized.

[Pavogrande]

That is the lower half of a hollywood swage set. Holds the cup and core. the spud with nut fit in the shellholder bore of the hollywood senior press. The missing top half, the nose forming portion, is 7/8-14 threaded and fits in the normal die bore. I think the smaller shaft at the bottom is the ejector for the finiished bullt --
I have two sets which are similar -- but for 30 and 44 calibers.

[randmplumbingllc]

This might help.

http://castboolits.gunloads.com/showthread.php?t=21319

[.357]

Cool thanks guys!