dont want to cause an areguement here but once you shoot your super brass 5 times it is cheaper then once shot 9mm brass that came out of random guns to begin with.the next 10 times will save you money if you plan to but dont have to use expensive V V powders.
and you will find gun builders that will tell you 38 super with the right powders is much easier in you guns with no signs of high pressure ever when compaired to 9mm. Just give Bob @ Brazos a call and discuss that with him,,,he forgot more then most of us will ever know!!