DWalt,
From what I understand, the .38 S&W had a shoulder in the chamber. .38 SPCL would not fully insert into the chamber if it wasn't reamed, due to the shoulder. Reaming allows the .38 SPCL to chamber in a .38 S&W cylinder.
From what I understand, the .38 S&W had a shoulder in the chamber. .38 SPCL would not fully insert into the chamber if it wasn't reamed, due to the shoulder. Reaming allows the .38 SPCL to chamber in a .38 S&W cylinder.