I went down the “+P rabbit hole” some number of years back, unearthing enough discussion around ammo of yesteryear (30s through 70s) being hotter than ammo of today—along with guys putting 10k +P rounds through airweight model 12s as an experiment—that I no longer have any concern about +P use in any steel gun made since Harry Truman was still a thing. I have 135 GDHP in my 3” model 36-1 in the safe as I type. That gun has had a lot of boxes of +P run through it since my dad bought it new in 1976. It’s still about the same as it always was, so far as I can tell. Still works, at any rate. JMO.
Here’s a Colt add from the 50s stating that the little D-frame can handle .38-44 loads—those loads were *far* beyond anything we are discussing from Doc’s list.