I bought a Cabine Tree grease wad extruder at least twelve to fifteen years ago for reasons that escape me now. It's seen minimal use but I intend to keep it and possibly experiment with it. Does anyone use grease wads these days with cast bullets?
I tried commercial grease wads a long time ago and, quite surprisingly as I recall, did see an accuracy improvement and a reduction in leading with plainbase bullets in .357 Magnum. I've learned a bit about leading prevention since then without the use of grease wads.