I've been using 231 with 180 grain MG CMJ and been happy. I finally decided to get a mold for .40 and got a Lyman 4 cavity 175 grain TC beveled base. (I already had a Lyman Handle and have been happy with the other Lyman molds I have.)
I'm sizing them to .401 and actual weight is 176 grains.
I loaded up 10 with 4.5 grains of 231 and chronographed them yesterday at an average of 895 FPS. That's a little faster than I need for a range load. I'm looking for about 830FPS.
I can't find any loading charts for lead with 231 in the books that I have and am wondering how low I can go powder charge wise.
Thanks bobo06