I finally got an answer from Lyman.
Their explanation was that trimmers are not designed to remove that much material and that any trimmer would do that (my el cheapo Lee trimmer works fine however). They also said that a dull cutter could very well contribute to the chattering of the cutter.
They offered to send me a new cutter head.
I'll let you know when I have news.
Their explanation was that trimmers are not designed to remove that much material and that any trimmer would do that (my el cheapo Lee trimmer works fine however). They also said that a dull cutter could very well contribute to the chattering of the cutter.
They offered to send me a new cutter head.
I'll let you know when I have news.