I think what a lot of it comes down to is that so many 38 shooters think their guns are flatter and softer than a 9mm, because of the higher charge weight. But if you use slow powder in 9mm similar to what you would in a 38, then all of the sudden your 9mm feels great. I'm loading 9 grains of HS6. I have buddies loading 10.5 grains of AA7, or 9.5ish of 3n38. Use slow powder, and your 9mm will feel just as good.