Trim conundrum: To paint leadbelcher base on leadbelcher primer or not to paint?

I am using leadbelcher for my trim and I'm currently trying to do some work around and save some time. I usually paint black primer but I was thinking to use leadbelcher primer instead and skip the trim entirely other than shade and highlights. What's your opinion on this? Is the deference marginal or should I reapply leadbelcher base for a better result?