I must admit I think it depends on the frame size and barrel length.
Now, could someone tell me why S&W aren't making the 386 .357 with only a shrouded ejector?
The thing's like 1/2 the weight of a 686. What's that little extra bit of Scandium which weights 3/4 of a fly's fart going to do? If going lightweight, why not all out light weight?
(Sorry, rant over).