Well Larry, the point is "IF" the same ballistics are met, if the max pressure is lowered it "Will" be made up somewhere else. The laws of physics have not been changed. As max pressure is reached inside the chamber the "Make-Up" occurs over the rest of the barrel's length, so the difference in pressure is much slighter than is the Max.
Bottom line is though that shooting a "Low Pressure" (IE low max chamber pressure) load ii no way makes t Easier on the barrel at a point some 18" down the bore. The pressure there will in fact be very sightly higher, though mostly insignificant. Just don't be fooled into thinking that shooting low pressure loads are of benefit anywhere other than in the chamber itself for they are not.
With all due respect to Drew, the problem is the pics he posted are simply not detailed enough to show that slight cross over. It is simply impossible to get the same ballistics & have that much difference in max pressure & it not be compensated for else where.
Last edited by 2-piper; 02/24/18 12:36 PM.