I agree with the above. I've been running drills with nothing but M&P 340s since January 2023. They weigh an ounce or two more than the 340PD but are very similar to the PDs. Very easy to carry. However, this year I've decided to work my way up from wadcutter loads to +P and Mags while attempting to retain my proficiency and am quickly learning that a heavier pistol is the shortest path between these two worlds.
Running a three-second Jill Drill (5-shot Bill Drill) from concealment with an M&P 340 took me over a year to accomplish with wadcutters. Running the same drill with a 640 makes it faster and my hits are more "certain". The smoother triggers on the 640s make 25-yard A-zone hits a lot more likely.
The first week of carrying a steel .38 in the pocket was very different than a Scandium J-frame. After two weeks I got used to it.
