low to high pressure shells Archived Message Posted by Jerome Seymour on May 16, 2018, 8:45 pm I have read (not on this forum) that American shot shell pressure conversion to high pressure occurred in 1927 and shot guns made from 1927 forward can use modern target load shells. Is this correct?? Message Thread: low to high pressure shells - Jerome Seymour May 16, 2018, 8:45 pm What shells were my guns designed to use? - Drew Hause May 17, 2018, 8:47 am Re: What shells were my guns designed to use? - Jerome J Seymour May 17, 2018, 2:44 pm   Searching