Any chance you are using a wet process to clean the cases?
I started seeing more people have problems with expander buttons when people started using wet methods of case cleaning.
I attribute this to the brass being TOO CLEAN.
Think about the dust that is left on the cases after you tumble in corn/walnut.
That dust actually helps act as a dry lube inside the case neck to help the expander button slide through.
If you are wet tumbling, you need to lube the insides of the case necks before sizing.
If you have completely clean brass sliding over an un-lubed expander button, the expander button will eventually get a little brass stuck to it.
Once that happens, almost every case is going to start galling to that brass.
Polish the expander button with 800grit sandpaper while spinning it in a hand drill to get the brass off it.
I started seeing more people have problems with expander buttons when people started using wet methods of case cleaning.
I attribute this to the brass being TOO CLEAN.
Think about the dust that is left on the cases after you tumble in corn/walnut.
That dust actually helps act as a dry lube inside the case neck to help the expander button slide through.
If you are wet tumbling, you need to lube the insides of the case necks before sizing.
If you have completely clean brass sliding over an un-lubed expander button, the expander button will eventually get a little brass stuck to it.
Once that happens, almost every case is going to start galling to that brass.
Polish the expander button with 800grit sandpaper while spinning it in a hand drill to get the brass off it.




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