Been there and done that one.
I did it with 308 HP Match rounds. Never did get the stuff out of those small hollow points
I almost didn't go through the effort of removing the media but my whole point in reloading bulk hollow points was for some stockpiled SHTF defense ammo. They might as well been JHP all clogged up like that.
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Just don't tell my wife how much any of this really costs.