Not intending to drift off topic with my .40 mag drop issue, as I know it will be fixed (along with the rear sight so far left it overhangs slide, as well as doing something about the measured 9.5lb trigger). A quick search here shows 100's of 40's are dropping mags. It is a known issue for many 40 Shield owners the S&W has acknowledged. I knew about it before purchasing, expected the issue, and still bought it without hesitation. 40 is the caliber I enjoy best, and I'm sure this Shield will be perfect when I get it back. (factory test shot dated 08-16-2012)

But it would be nice to have the 9mm option, which is why I asked about the 9mm mags in the 40. Two guns for the price of one and a little extra change.

How about this: For those that have one of the 40's that drops mags, and has tried a 9mm barrel, how is the 9mm mag working out in the 40?