compression dies

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Do you mean a die with a compression plug? What manufacturer and part number? It should have come with instructions or at least destructions.

Ron
 
That was the first thing that came to mind for me BDS, though I'm not aware of such tooling being used for resizing brass. Maybe a collet type die is what he's referring to?

I wonder if the OP will get back to us and clarify?

GS
 
A compression die is for use with black powder.
Black powder is usually compressed to 1. get a suitable amount in modern drawn brass but mostly to 2. ensure uniform and clean burning without 3. distorting the bare lead bullet.

To use: Select a powder charge. Load it in the case, preferably with a long drop tube to get it to settle so it does not have to have as much compression. Put a card wad on top of the powder.
Select a bullet seating depth; maybe to the crimp groove, maybe to touch the lands in a single shot.
Adjust the compression die's plug to compress the powder charge to the seating depth so that when you seat a bullet, it runs right down on the wad with no air space but no force applied to crunch the bullet down on powder.
 
Ok, now I know what he's referring to, but I have a DIY tool that does alright.

I made one using an old dull Lee trimming cutter stud, one of those before they made them of carbide. Then I threaded a stud to fit the cutter for each caliber needed, I slipped a small washer over the cutter so the mouths don't get accidentally buggered up. It has to be short enough to fit in the press frame. Then I use my priming die for something to press it against. Works good enough for my needs.

Seems like I'm constantly running into these new fan dangled tools that I've already made.

GS
 
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