Interesting, it seems to fully corroborate my own conclusions on some points. One, that HST is one of the best SD rounds out, and another that over-penetration is as undesireable as under-penetration. On that note, it's interesting to see that XTP and Fiocchi barely expanded and waaaay over-penetrated. For me this would put them in the "NO" column for SD carry, same as ball ammo (for .45ACP anyway). Give me 12-15 inches of penetration, no more, with good expansion. Which again, HST seems to fit the bill perfectly.
But the testing also raises some questions.
His mention of unstable bullets and "keyholing" from the 4" Kimber, particularly with Winchester SXT, is troubling, but I don't recall ever hearing of it in all the other compact 1911 tests I've ever seen. If it's as bad as he says for a 4" barrel, imagine what it would be like in a 3" micro! I'd be inclined to agree with him that this may be an isolated issue with his Kimber, although I'm not sure what it could be. Damaged barrel? Chamber out of spec?.
Another interesting note: in almost every case, penetration was greater from the 4" barrel than from the 5", despite the reduced velocity. My presumption is the greater velocity resulted in quicker expansion and thus reduced penetration?