Anyone who hasn't seen a billion ".XX vs .XX Shootout!" articles in the magazines probably isn't familiar enough with firearms to understand the replies.
Should'a told him to choose between .38 Super and 9mm Largo.
Hey! .38 Super ROCKS! Of course, to load it to "major caliber" loads, you need to run it up to pressures greater than the cartridge was ever designed for, so you can only get 2 or 3 reloads out of a case. And you have to use fully ramped (supported) barrels, otherwise you'll bulge the bottom of the case...
Of course, this is only for games like IPSC and USPSA.
Mark