Cold oven start trial

Tried a cold oven start today...Interestingly I baked for 30min on stone, covered with a pot, when I removed the lid, there was hardly any oven spring. But after another 25min, it came out not too bad I suppose. :)
Crust was crispy and interior soft and moist. I suppose I could have proofed the loaf a little longer. Anyone uses the cold oven start method? Have a great sunday!