Where is the line drawn between low pressure and high pressure? I recall a discussion years ago when the late Miller explained that the pressure curve was more critical in the barrel and was as important, if not more critical, as the peak pressure number. Seems I recall his referring to an old graph comparing pressure curves along the barrel length of various loads. I've seen loads which were listed as "low pressure" having psi in the mid 7K psi; others in the 5-6k psi range. Gil