Many of the casting companies will size the 147 bullet .358 if you ask. My Marlin did not like 38s unless they were loaded out to the 1.50 range. The 147 fed great in 38 cases . A lot of people like to shoot the really light bullets in their pistols. These can cause some problems loading them out. I had a 92 that I had shot for years with smokeless 38s and when I loaded first loaded some blackpowder ,357 I found they would not chamber. After cleaning the chamber I started just using 357 brass for it. Using both .38 and .357 makes it easier to keep pistol and rifle loads separate if you want to go that way. If your rifle feeds 38s fine and want just one load for both it and pistols 38 brass is more common and cheaper, Some day if you want to shoot real .357 you might have to do a good cleaning of the chamber. That was the norm when shooting 38s for practice and .357 for duty guns was the norm. Some places though loaded everything in .357 cases to keep from having to clean cylinder build up. Also some competitive shooters used .357 brass in their low power competition loads because the thought not having that. 1/10 of an inch jump made the .357 loads more accurate. Of course some people who want different loads for pistol and rifle use brass cases or nickel cases version of the same caliber for the pistol and the rifle gets the other. Then you have people who say never use nickel in a rifle because it will split and others who say nickel feeds better in a rifle and lasts just as long a plain brass.