If the birds(hens) you select have good egg laying characteristics and the rooster comes from good egg laying ancestry then the hybrid vigor may give you a marginal boost in eggs per year. It is the decades of selection that is the BIG factor in industrial egg laying and thus the burnout.
Much...
I explained it in the other thread. HYBRID VIGOR is part of the equation in increasing performance but the big one is the SELECTIVE BREEDING for egg laying ability. So doing your own cross will give you the hybrid vigor part of the equation but not the element of generations (decades) of...