if you were to assume the pit and corso were decently bred , i would guess 90lbs , maybe as much as 110 depending on if the bitches sire was also one of them big pitbulls , a 70lb pitbull bitch has some mastiff in her pedigree , whether it's written down or not .....it's been my experience F1 crossbred dogs/litters are usually pretty predictable and consistent , the more consistent the individual parents are bred , the more predictable the pups ...most folks see crossbred dogs as random , that'd be because most crossbred dogs are not well bred dogs to begin with , not a lot of folks cross breeding rom dogs ... when breeding F1 crosses it gets a bit more unpredictable , those dogs need pushed in one of the parents directions , when bred with each other it's a mish mash that takes generations to sort out ........ when bandogs were first commercialized , swinford , the problem was consistency , he used 3 different dogs and bred F1's to F1's , they wanted to degenerate back to the more normal look and size of a pitbull , that's why those giant pitbulls are more consistent than the bandog mastiffs ...... guys like lucerno took them toward the mastiff , pushed them in that direction , retaining some pitbull temperament and got some pretty consistent results , got some drivey mastiffs ....... guys like eddington pushed them toward the pitbull side and retained the mastiff size , got giant pitbulls ......... it's easier to do what eddington did than what lucerno did