RE: Pressure signs this early??????
Your going to have to make you a split neck case and see where the lands are. Its in most manuals how to do it. Do you have any tools like Comparitor to measure the ogive? I suggest loading .02" lower than where it hits since you hare seeing these signs.
Did you have hard bolt lift? Punctured primers? Flat primers alone does not always mean high pressure. Did you trim your cases to min length? Do you have extractor marks on the case? Primers is just one indicator to watch for.