Well for one I never and would never feed pinky mice to a BP, even out of the egg they take a prey much larger and anything smaller to an average size animal constitute underfeedin. Pinky mice are for hatchling colubrid food.
Rats are not better gram per grams it's all the same the difference when a BP get to a certain size you have to feed multiple mice where as with rat you can just offer one (it's matter of convenience and cost) but ultimately what works is what should be fed.
How do I do it.
Open tub drop rat or mice, close tub, open tub drop rat or mice close tub repeat.....when the first rack is done go back check and remove any uneaten feeder.
For animals feeding on F/T open tub dangle prey by the tail for adults, grab it from behind the neck and moving it around like if it was alive for hatchlings and repeat X number of animals spending 2 min max per animal.