We're really on the same page here, GF, except that my style of "humor" is probably not your cup of tea. Actually, maybe nobody laughed at it. If that's the case, then it was, more or less by definition, not funny. Nevertheless, a concern about +P or, for that matter, even the undefined +P+ in an N-frame revolver, does not make much sense, as Saxon Pig points out. Even if one disagrees with some of his arguments, the conclusion seems to me to be inescapable. And that's in a Heavy Duty or an Outdoorsman. In a 27, 28 or 520, the concern should not be dealt with seriously, so I don't.
P.S. BTW, a true 27, 28 or 520 has a model number, so even S&W would consider +P ok.