BM1, you may not please everyone but I'd bet most will be estatic with the final product. By the way, the part of the barrel which fits the barrel bushing is likely to be a standard that most all guns will accept without any further fitting because of those tolerances.

I would suspect that the 357 Sig conversion would do well because like the 40S&W ammunition is readily avalible at most common outlets and at reasonable pricing. Many people don't load for themselves therefore they will find that these conversion barrels will compliment their shooting budget in the long run!

Thanks again!