Nick's #5 chart is interesting but it may be a bit misleading. I mean, it's based on an established load (.30-06, 150 gr RN, 53/4064) and then only the seating depth is changed starting from lands contact, which then gives the low pressure point at about .25" off the lands. IF the loader develops his charge at the OAL he seeks, no matter how close to the lands, there will be no pressure "spike" so long as he stays there. (I hate that term "spike" as if it's something spooky, all chamber pressure is in the form of a time
ressure spike, our job is to keep it normal.)