Not to my knowledge Seafire, due to body taper.
As far as feeding issues since the 6mm Lee navy is a rimless case that had a smaller diameter bolt face, so it was made larger (semi-rimmed) to fit the 473 bolt face. Since the rim is being enlarged, not all lots have the same rim thickness/ diameter. I have had lots from Norma, Win, and Remington that I had to use a modified shell holder to load the brass due to rim thickness.
If you want to know about the 220 AI, just look up the 220 Weatherby rocket. Ackley gave up on it and so did Weatherby after they had concluded that the extra capcity and powder did nothing to improve performance of the round.
