Just so ya'll know this isn't urgent, I'm going to order a Springfield "loaded" in 45acp for my first IPSC Limited gun next week. However, down the road I would like to order a 9mm Springfield to convert to 38 super to "backup" the 45 if it should break, and as the basis for an Open gun in the distant future. I've often wondered about this caliber, and it has much more appeal than 357sig for me. However, I've also heard many stories of blown caseheads when loaded hot to meet Major power factor. I know Major was just lowered to 165, do you still need a fully supported barrel to meet major? And any advice on the conversion to keep in mind?