It's not just the depth of seating ,it's the gripping force of the case. When holding the cartridge in your hand , gripping with the fingers , thumb on the bullet , if you can move the bullet without too much force the grip is not enough. Sometimes eliminating the expander is enough or get a proper expander diameter.
Always remember to do what your gun wants which is not always what you want .
One caliber should do it . Nothing is gained by the bullet going beyond the curve ,