Re: Hornady LNL
The drop inserts work just fine for 44mag an 357 for me with both Unique and H110. I have not run other calibers through it yet, as much as I need to get cracking on the enormous pile of brass sitting on the floor.
I shoot light charges of Unique in both calibers, in the 357 it's around 7.5gr IIRC and I didn't have any problems with metering consistency.
EDIT: I haven't loaded any charges lighter than that though, so the special add on parts might be necessary.