Polishing steel sizing dies

[jetinteriorguy]

Even clean brass--even really clean brass will eventualy show sleeks ..again from imbedded primer residue. Of course one can decap & clean the brass first--then resize. I chose not to do it that way..perhaps I should.

So if I’m understanding your post correctly you are resizing your fired brass without at least cleaning it first? If so this is the beginning of the problem. Just deprime, then clean before sizing and don’t forget to keep the die clean and you’ll eliminate at least 90% of your problem. A little polishing of your die with Flitz on a soft Dremel wheel will take care of the other 10% of the problem.

[Moleman-]

When I have a die with some brass buildup or am making a new die I'll run a burgandy 3M pad on a split stick in/out of the die briefly. It only takes a few seconds to clean out brass streaks or leave a very fine crosshatch pattern on the die to help hold lube. I also always run the cases in a tumbler even if you run them a short enough time that they're not starting to polish up yet, it's already taken the grit off of the cases.

[Wally]

No Sir--I do clean my brass first before resizing.

So if I’m understanding your post correctly you are resizing your fired brass without at least cleaning it first? If so this is the beginning of the problem. Just deprime, then clean before sizing and don’t forget to keep the die clean and you’ll eliminate at least 90% of your problem. A little polishing of your die with Flitz on a soft Dremel wheel will take care of the other 10% of the problem.

[jetinteriorguy]

No Sir--I do clean my brass first before resizing.

Ah, upon rereading your posts I see where I misunderstood. Should have had more coffee I guess.