R-Man;
I certainly appreciate all the info you have given here on this subject. As everyone knows I am ""NOT"" an engineer. All that you have said was very well put & quite easily understood by one without any kind of sheepskin at all beyond a high school diploma.
Larry;
From the mouth of one who is not an engineer nor professional writer either;
Visulize a bbl with a series of lead crushers placed at intervls down the bbl. Fire a shot & measure the crushers to obtain the pressure. Now each one of those pistons will record a "Different" pressure, highest nearest the breech & lower as you go toward the muzzle. Note well though that each of those crushers will record the "Maximum or Peak" pressure that occured "At That Point", that is after all the only pressure a crusher can record.
If one wants to know if the walls of his bbl are thick enough at some point to handle a given load then what he better be concerned with is what the "Peak" pressure is going to be at that point. If you look at those charts by DuPont which have been posted on numerous occasions you will see the pressure curves from the loads which gave the lowest "Peak Chamber" pressure crossed with the curves of those giving the highest near the end of the chamber & were higher for the rest of the travel down the bbl. The point of greatest seperation occured around 4"-6" distance from the breech.
R-Man;
There are those of us here who greatly appreciate your knowlwdge in theese matters & your input on them. Keep it up.
