If S&W could fit 6 rounds of moon-clipped 30 SC into the 640 pro envelope. My sense is that it’s absolutely doable, given a physical dimension comparison with .327 fed mag. But is it worth doing?
I dunno. What do you all say? Aside from the fact that I dislike revolvers that are as loud as an AR at the rear end (which includes the full-house .327Fed), the idea has some merit for a J-frame lifer. At the least, the concept appeals to those who like 9mm revolvers—and would jump at a 6th round.
Maybe Ruger will tool up a 30 super LCR.