I am starting with a RL550B set up to reload .223.  I use a new automatic powdewr system for each caliber that I reload.  I now want to load 300 black out, which is a 30 cal bullet in a cut doen .223 case.  My question is which powder funnel do I need for my powder system to cycle properly?  This case is short compared to the .223 case and doesn't want to move the bar more that 1/3 of the way.