You had a quite a different experience that I have over the decades. The new guns of the 70's, early 80's (basically your Colts, not much else was around then) all needed a T&P if you wanted to feed something other than ball. At least none of the ones I bought would without it.
Things that came later were a crap shoot as to what they needed, and most all of them did not work 100% out of the box. Many actually had the balls to tell you, YOU had to put a couple of hundred rounds through them, on your dollar yet, to "break them in". *** is that? (Whiskey Tango Foxtrot. I see now even abbreviations are "bad"
)
Between the SIG and Glocks Ive owned now, which is now more than the number of 1911's Ive owned, all (except that one SIG P238, yet another poorly done 1911 copy) have been 100% right out of the box. Id trust them enough to open the box, load the mag, and put them in a holster.
Would you trust picking a random 1911 out of a pile of new boxes and doing the same?