It’s only a small subset of shotgun users that need to care about load pressures.
Mostly because all the modern published loads, and the governing bodies, keep the pressures down into safe levels for modern firearms.
If you migrate into using vintage firearms, that may or may not have seen thousands of pressure cycles, there is no governing body to tell you what to do.
I fed an auto loader hundreds of high pressure loads.
They cracked the receiver, and bent the action bars.
I won’t be doing that again.
