feeding questions pkease help

So have have my 4 bps between 460g and 610g should o be feeding the bigger two (both atone 600) small rats now or is that to big.

Small Rats would work here is a list of aprox sizes

MICE

Sm. Pink 1-2 grams
Lg. Pink 2-4 grams
Peach Fuzz 4-6 grams
Fuzzies 5-8 grams
Hoppers 8-12 grams
Sm. Mice 11-16 grams
Med. Mice 15-24 grams
Lg. Mice 24-28 grams
XLg. Mice 30 grams+

Rats:
Rat Sm. Pink 3-8 grams
Rat Lg. Pink 5-12 grams
Rat Fuzzies 10-20 grams
Rat Pup 20-30 grams
Rat Wean 30-45 grams
Rat Sm. 40-80 grams
Rat Med. 80-150 grams
Rat Lg. 140-200 grams
Rat XLg. 190-250 grams

So small rats every 7 days or wo would be fine for the larger 2 and weanlings for the smaller 2 would be about right :)

I personally never look at the weight of the BP.
I always feed based on the thickness of the snake, thickest part of BP times 1.5 is the max size food you can give.

Again personal opinion but I judge weight and eye ball girth. I feed sub adults 10% mass every week, give or take. I feed adults less between 3-7% mass every week too. It works for me. I check to make sure it is not an overly round rat and it is not larger than the snakes girth but I have never seen a rat that was 10% of the body weight of a given snake bigger around than the snake is.