Firelapping my FX liners.
Started with 25x700 STC-A pellet liner. Rolled the pellets into Clover 280 grit compound paste and fired some 20 shots low speed. Shaved off a decent amount of high spots, re-fired a next 20 shots. Almost perfect but focusing now on feel and still some high and low spots.
Tinkering now to melt some lead and cast a longer slug and try manually to blend all together.
I have some six more liners to do in 22 and 25 different length and twist rates.
Expecting the winter will be long enough before I go to test these out.