Fortunately today we have very good data as to the pressures of loads used at the turn-of-the-century forward, the loads recommended by U.S. double gun makers, and the proof pressures used by the makers
https://docs.google.com/document/d/1F2sQuPm05IE4VWYYnCkvuXmYEzQoWd_SQgaAfUOZEFU/edit A.H. Fox recommendations courtesy of Researcher
![[Linked Image from photos.smugmug.com]](https://photos.smugmug.com/Shotshells-and-pressures/Shotshells/i-xWfVNKD/0/dbf8445d/M/S%26P%2017%201914%20Fox%20Loads-M.jpg)
Scroll down about 3/4 way here for more information
https://docs.google.com/document/d/1ZIo0y746UsSRZIgRuuxwAbZjSBHitO_EanvwLYc-kGA/editIMHO, after an evaluation by a double gun specialist with the interest, equipment (wall thickness gauge and bore scope), and expertise to properly do so, limiting recoil in guns with 100 year old wood is more important than limiting pressure, if the pressure of the load matches the pressure of the loads for which the gun was designed.
In general, lighter recoiling loads in the same gauge do generate less pressure, recognizing that pressure is not part of the recoil equation.
