I agree with you Sarge. The newer Glock barrels have tighter chambers than they did before with more support. My point was more that current Glocks aren't that different from all the other brands. None of them have full case support because of the fact of the feed ramp cut at the 6 o'clock position.
BTW, both my 2003 G22 and 2004 G23 have chambers that look like the Glock 2009 chamber in the middle of your picture above. That said, a friend brought over some 40 brass that was severely bulged and we ran it through my Lee dies with exactly the same results. He's reloaded them 6 times so far with only a couple of split necks as damage.
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