Is this ink the newly formulated, revised ink by Canon for the ipf 6300?
Although I am not absolutely certain that you can't use this in the 6300, I can tell you that the package I have clearly states that it is for the 6400 and the 6450. It does NOT list the 6300. Also, since the expiration listed on it is for the end of 2014, I suspect it is not a newly formulated, revised ink. Hope this helps.