I used them for years for Rifle cases, They work great give excellent results, also need to use a Wilson guage to trim inside & Outside case neck after filing.
I used them (RCBS File Trim Dies) when I first started reloading way, way back when. They worked OK back then. In fact I still have them. Sort of hard on files.
Just did a couple hundred 243 brass. On the RCBS power case trimmer. Spoiled i guess. If you have the RCBS trimmer and a cordless drill, you can have a power case trimmer very easy.