The purty color coordinated ones are $18 more than Dillon’s and the shiny (when new) engraved ones are only $2 less than Dillon’s. Besides maybe being prettier, what do they offer that Dillon toolheads don’t?
I can get the colored ones off eBay for $14 each, flat shipping of $6. So for $50 I can get 3 tool heads. Or two from Dillon
I could argue that a little slop may actually help the the head center itself, but with several stations filled at a time, it couldn't float all the dies independently, so that may be meaningless, too.
I don't know anything against them. I also don't know if tighter tolerances are useful unless you also can get tighter tolerances in the shell plate and ram alignment somehow. You'd want to do something like load and check cartridge concentricity with a Dillon head and again with the replacement part to judge any difference in result quality. I could argue that a little slop may actually help the the head center itself, but with several stations filled at a time, it couldn't float all the dies independently, so that may be meaningless, too.