If your jacking your car up it can restrict the flow through the rear comp..
I just let my car gravity bleed itself as the hardest part is getting the fluid to flow in the first place.. I haven't finished fully bleeding mine as it was totally dry, new lines, calipers, master cylinder.
I'll use a pressure kit myself to finish the bleeding, but once it blew brake fluid over my engine bay so I always make it a 2 man job.. One to play with the nipples, another to turn the air on when needed.