I just discovered that my Iver Johnson .32 is in fact a .38 S&W caliber. Almost 20 years ago when I picked it up it had a tag on the trigger guard that said "Iver J. 32 cal." and I never questioned it or looked very close until today. In doing some research on another forum, I found that the 5-shot cylinder like mine was always referred to as a .38 while the .32 was a 6-shot. I opened it and looked and suddenly it was obvious. Just to confirm I reached for some handy .38 Spl. brass and sure enough it slid right in. Bottomed out, of course, but this confirmed that it is indeed a .38 cal. I also found out that I have a 3rd model IJ Top Break revolver, DOM 1909. The 3rd model was designed for smokeless cartridges, but it will remain silent still, unless it is refurbished and then given the OK by at least one good gunsmith.