Turning the seater die down until it contacts the case and then backing off a full turn is a normal procedure when you DON'T want to crimp. I (and I think most 30-30 shooters) do a crimp into the cannelure of their 30-30 bullets. So to do that you would actually screw the die down until it contacts the case, then a little bit more. Doing that might solve your "can't get the seater stem to push them in deep enough" problem.
Follow the instructions that came with your Redding dies on "seating with a crimp" or words to that effect, and I bet they work fine. I use a Redding FL die set for my 30-30 and it works great and shoots MOA.
Good luck with it.
Rex
