My first experience with reloading bottleneck cartridges was with the 30/30 about 10 years ago. I threw away the first 30 or 40 cartridges because they were so mangled and unfit to fire.
30# is too much pressure to crimp, in my opinion. I have RCBS dies, too but I have been buying Lee factory crimp dies for all my bottle neck cartridges. I was crushing the cases with my crimps, I was used to straight-wall pistol cartridges. They would bulge right under the crimp and would not chamber.
I am assuming you are reloading these for a 30/30 lever-action so you must crimp them. Some bottleneck shooters don't even crimp the bullets, they rely on case mouth tension and where the bullets engages the rifling in the barrel. That is mostly benchrest shooters and the like.
You will have to experiment with the crimp die to get it right. I will tell you a regular roll crimp is very dependent on the overall length of the case!!! If one case is too short it won't crimp down very hard, if a case is too long it will crush the rim because the stroke of the reloading ram is the same no matter what the case length.
After my first disaster with the 30/30's I got some old cases and just experimented with them, no powder, no primer. I finally went out and bought a case trimmer and the Reloading Gods smiled again on me. I started using the factory crimp dies when I started reloading .223's and .30-06's for my semi-auto rifles. My fingers would be little bloody stumps trying to trim down all those cases! But I still use the trimmer and roll crimps for the .30/30 and my .348 sometimes. Depends on the load.
Hope this helps. If you have any other questions that no one else answers shoot me an email and I will see what I can do.