Alright so here are my findings. I knew the 223 XL750 kit would work for 300 Blackout. The only thing I change was to an AK powder funnel and I was in business.
Now on to the RL1100. I use a #3 shell plate the same for .223 and the white, pinned case feed insert. It works just fine for 300 blackout. I use a universal FW Arms swage foot die and that is perfect. All I do is swap out tool heads. This is a savings of 600$ or more. Pass this along to anyone that is interested.