Check the USPSA website or post in the Competition area here: my understanding is that .38 Super isn't legal for Limited class... has to be .40 cal and above (where major loads are an advantage). You see .38 Super in Open class mostly. If you're gonna use it in IDPA ESP class, you don't need to make major. Major in USPSA is 170, I think, but someone here will know. It's 165 for IDPA CDP, or was. Good luck. You could always go with 9x23... that case has a thicker web. OR, 10mm, and you can load up for major or down for minor, and get a .40 SW barrel too, and have your choice of calibers (easier to get .40 brass for general use).