Some breeders feed heavily, some even more heavily to be able to use their animal sooner, does not mean it's right or healthy, I myself prefer a slow steady growth.
It's not about weight, or comparing your snake with someone else's, it's about health and healthy proportion.
There are a lot of different factors into play in an animal's weight, size out of the egg, how fast the animal is started, feeding frequency, prey size, fast, the animal itself.
At this size feed a prey equal the girth size once a week until the animal is 500 grams and your BP will be just fine.
And remember BP tend to be overfed in captivity.
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