Here's a sneaky trick- - - -while you're bleeding the brakes, adjust the shoes out to a firm contact with the drums. That pushes the pistons all the way back in the cylinders and allows the fluid to completely fill the space between the seal cups more quickly. Once you're getting a solid stream of fluid from all the bleeders, then go back and adjust the brakes for normal running clearance. Worst-case scenario, you might have to rent or buy a pressure bleeder.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!