Reloading
I just came cross this article online at Why is the 165gr .40S&W better than the 180gr???? - AR15.Com Archive.
THE CASE OF THE CASES
A 10mm brass case is approximately 0.992" long, while new .40 brass is only 0.850" long; the difference is 0.142 inches. Since the size of the 180gr bullet remains...