Goodfellas and Casino had a lot of scenes, too. I'm not sure if it was 300, but it was a lot. I remember some Sharon Stone interview where she talked about freaking out when she got the Casino script and seeing how many scenes were in it. Marty likes to keep his movies fast paced, and this will be no exception.

"...the successful annihilation of organized crime's subculture in America would rock the 'legitimate' world's foundation, which would ultimately force fundamental social changes and redistributions of wealth and power in this country. Meyer Lansky's dream was to bond the two worlds together so that one could not survive without the other." - Dan E. Moldea