No disrespect to the Dillon rep as he is totally correct.
I modified a RL 450 to load .223 using the case feeder (dedicated set up), but you need machine a few parts to make it work.
I'm a NRA service rifle shooter, so my rounds needed is 90 per match. A lot less than the 3 gun crowd.
I de-cap and wet tumble, size and trim with a Dillon trimmer die and hand prime on a Lee tool, which is not something the 3 gunners might not want to do.