that sounds find. If he doesn't keep this meal down or regurges for you in the future, please take him to a vet.
I had one snake (not a ball python, but a corn snake) who would regurge every meal with great husbandry. I took her to a vet and she ended up not having some congenital digestive issue (it's been awhile and I can't remember the exact diagnosis). She had to be put down.