RWS was a problem with US manufactured 7x57 dies as they have slightly different head dimensions. Use a #3 shellholder in place of #2 and its OK, but not a perfect fit.
But , very good quality, consistent robust product.
I am using Norma 7x57 brass at present, and have only good experience with it.
Same here, the 7mm Mauser Norma brass is very nice, as is a bunch of other Norma brass I have used. It is my favorite stuff next to Lapua.