CassandraComplex, a few corrections to your conclusions:
-S&W 940 frame is the same size as the rest of the J frames. Even the cylinder is not shorter (like it is on .45acp N frame, compared to .45lc N frame). The chambers are just reamed shorter for 9mm, so bullet has more travel before it engages the forcing cone. In fact, I guy that bought mine, had the chambers reamed out to be able to shoot 9X23, 9X21 and 9X19.
-9mm is more efective than .38spl. Due to higher pressure and shorter case, it does much better out of shorter bbls. It's not as effective as .357, but close, due to shorter case. It recoils less than .357, but the recoil is still stiff.
Glen:
-Moon clips are a good thing, less bulk than a speed loader. Just be carefull not to bend them.
Btw, I want an L frame in 10mm. Could shoot .40 out of it too.