I have been baking sourdough bread since January of this year. My problem is with the baking. The results are not consistant. I put the dough in a bread pan for the final rise. When ready, it goes into a cold oven which I set at 350 and then bake for 15 minutes then turn 180 degrees and bake for another 15 to 20 minutes. I always get the oven rise, but I need help with the conundrum of the bulge. Sometimes its there and sometimes not.