Weight I didn't manage to check.. Mice ard 4inc, which I feeded to my other smaller ball python got no issue..
Temps are ard 28c to 30c.. And I keep my two ball python together..
Cohabitating the two snakes could cause regurgitation. Ball pythons are solitary animals and should not be housed together.
Your snakes is stressed and this is almost definitely the reason for the regurge.