Aggression = Fear
If he is well fed and still striking at you then he is afraid of you.
The best way I've found to show you are not a threat is consistant short handling sessions. Every couple days or so (unless sheding or if he just ate) just take him out for a little bit and then put him back. It will take time. It could be months, even years for some BP's, but eventually he will learn not to fear you.