I just stuck my nose in your thread to say welcome to the forum mouddie. Don't worry about being called a knuckle head. It doesn't usually happen here, and if it does you'll just remember the answer to your question longer.

Your question is about a rather unusual obsolete model built for a old fashioned sport with drastically reduced participation, so it's not surprising that you’re not familiar with 52s. A 52’s frame is basically a modified steel model 39 9mm frame so it is not long enough fore & aft to accommodate most .38 special cartridges. Only .38 special cartridges loaded with flush seated full wadcutter .38 special bullets will fit in.