Yup, they decided 10mm had too much kick and the grip was too big. They down loaded it and shortened it to fit in a 9mm frame. Thats why many call it the 40 Short and Wimpy. However 40 has more pop than 9mm or 45 in my experience, but all are more than manageable. 10mm really excels at its top end. but no reason you can load in the middle either. That's to joy of reloading, you get to tailor it to your needs/wants.Dang you were pretty spot though. Just looked in my Hornady Manual. 40 S&W 180 grain max loads are right in line with the middle of the road loads from the 10mm. 10MM minimum loads hang right around the same velocity as middle of the road loads for the 40 S&W