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UPDATE

Found the source of the problem. It's the vent hole in the die. Debris gets sucked back down
the die and collects near the mouth of the die. The next case gets scratched and adds more...

Sizer's been polished a few times already. Had to in order to get those brass chips out. It's slicker than snot on a door knob when I start.

Cases get pretty dirty and tumbling is the easiest way...

Makes a lot of sense, runfive.
I know there's brass bits stuck in the die 'cause I've scraped them off. But you got me to thinking...small bits of grit shaving brass off the case and compounding...

Hey guys,

I've been reloading my .44/40 for a couple of years now. Recently, I've been getting scratches on my cases. The scratches are coming from small bits of brass that seem to accumulate in...

I've tried a passal of copper fouling cleaners. All of them used ammonia. Of those, Sweets did the best job of removing copper. That is until I tried KG-12. It's a water based copper solvent, doesn't...