I have one Male BP that can occasionally get a little fedding aggressive in his tub. I use a rack system all 3 of my ball pythons are tong fed frozen thawed... "Maybe" can get a little agressive if I don't handle him between his weekly feedings. Use something to distract him while you pick him up from behind or use a snake hook to take him from his tank. With maybe I used a cover from a sterilite tub in front of his face and if he struck he hit that which made him think twice the next time. As for tub feeding(feeding outside his cage that is something you can try, it might stress him in the beginning but he will quickly get over it when he realizes that tub means food! Always use a long tong to feed and ALWAYS wash your hands before you handle him. Scent is one of their strongest senses. Heat(from your hand) combined with any mouse scent( or other mammal scent, as in cat, dog ect.) could cause an accidental bite. Probably not but better safe than sorry. Good luck. Also check his cage size ect.. What size is it and how many hides ect.. he could be feeling threatened.
Mike