Actually I don't have very many adult BP's. Just adult Retics, adult Burns, adult Anacondas, and adult Boas.
Obviously different animals but let's say for example my biggest retic is 35lbs and over 12' long. Going by the 10% rule she would only be taking 3.5lb rabbits. Way under sized for her. If I let her she would eat two-three 6-7lb rabbits.
Retics take a little bigger prey than BP'S but it's the same concept. And all of my snakes are lean and athletic. Very fast and agile.
Seems like a lot of BP owners feed so small you can't even tell the snake eats. Too many people get hung up on the Golden 10% rule. Obviously that rule doesn't always work.
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