Modoc, i did just now discover that the piece right under the shellplate that i believe dillon calls " the platform" has a upper rim, diameter, that is just a tad too small to accept the complete rim diam. of the 50-110 and 50-70.
I do see that dillon does list a shellplate for the 50-70 and you have to also buy this "Platform" piece which i assume is just a tad bigger in order to accept the rim diam. on the 50-70. I believe this piece may also accept the 50-110 rim.