I use a similar mix of paraffin and beeswax (haven't tried the tallow mix yet), pour hot mixture into a pie pan to about 1/8'' depth, let it cool then use an empty .45 case to cut out wads. Like you, I place them directly on top of the powder them ram the ball home over it. Works like a charm and I am able to fire off six or seven cylinders full in my '58 Remington before it even begins to show signs of binding. I will admit that I cut grease holding grooves in my cylinder pin which helps too. I just rub a little SPG or Lube 103 on the cylinder pin and then go to shooting.
This sounds neat. I have been using the "bore grease" that came with my CVA pistol to just cover the nose of the ball with goo after loading. I like the idea of cutting out little wads.
Do you put all your wads in a little zip-lock bag or something? Do they stick together?