They surpassed the previous record of 263-5, set by Royal Challengers Bangalore in 2013
The selectors have chosen to drop batsman Imrul Kayes, pacer Taskin Ahmed and wicketkeeper Nurul Hasan from the team that played the Nidahas Trophy in Sri Lanka in March.
Neither Imrul Kayes nor Nurul Hasan played a match during the tournament.
Squad: Shakib Al Hasan (capt), Mahmudullah, Tamim Iqbal, Soumya Sarkar, Liton Das, Mushfiqur Rahim (wk), Sabbir Rahman, Mosaddek Hossain, Ariful Haque, Mehidy Hasan Miraz, Nazmul Islam, Mustafizur Rahman, Abu Hider, Rubel Hossain, Abu Jayed