Jwirlwind,The reason pizza is cooked at 800 deg and higher is because you are trying to quick bake the crust..This will allow the yeast to expand quickly and the crust to form keeping the steam on the inside of the dough allowing it to keep the dough soft.....The reason people at home cook pizzas at 500 or less is home ovens don't go over 500deg ..600+ is the cleaning cycle.
