Your argument with regard to available brass and the procurement of said brass is a fine argument and it makes a lot of sense
generally speaking, but it becomes a
VERY hollow argument with no teeth whatsoever when we are talking about a moon-clipped revolver, and actually -- even LESS when we are talking about a 10mm-chambered moon-clipped revolver that can (and will) make heavy, regular and high-volume use of .40 Smith & Wesson brass which (not by years, but on any given day and IME, nearly -EVERY- given day) is
far more plentiful, cheap and easy to find for
free scattered across most ranges.
Wow. I think I spit that out in one sentence. Instead of a handful of scattered sentences to be gathered up & taken home, that little rant was like, say, SIX sentences -- but all clipped together, to be picked up as one single unit,
easy to find, picks up from the ground
six times as fast (if you even chose to drop them there, you needn't!) and, well, you get the point.