I have a Possum Hollow.
It works just fine - I chuck it up in the drill press and can trim fairly rapidly. My biggest complaint is that I still have to chamfer and debur, but at least it significantly speeds up the trimming part.
With all of these trimmers you'll have to figure out your technique - with my PH, I have to spin the shell so that I get an even trim all around. If i don't, the neck will have a slight angle to it. Just the nature of the beast.
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