I just double-checked the article. He states:
"Then I found two loads it loved. Federal's 147 grain sub-sonic "tactical" police load and the standard version both fed 100%, had modest recoil and were real tack-drivers. I found if I did my part from a rest I could get some groups that hovered around the 3" range. Allow me to say that again, please. At 25 yards, the R9 shot 3" groups with some ammo. I don't usually get that kind of accuracy wiht full-sized duty auto pistols, much less a pocket-pistol."
The author continues on...
"Then came more enlightenment. Speer's 124gr Gold Dot HP shot smoothly, gave comfortable recoil and went into 2.5" at 25 yards. Not once, not twice, but about every time I tried. This little gun shoots like balls-afire and in all honesty, a head-shot at 25 yards is possible with the right load. Sitting rabbit at 20 yards? He's yours. One my range, lurking at the 75 yard line, stands a man-sized gong, which we often bang-away at. I was able to hit it about 90-percent or better with the 124gr GDHP, and the only reason I missed was because I missed, not because the pistol couldn't do it. Simply astounding, if you ask me."
(From Roy Huntington's article in the current American Handgunner magazine).
Note that he DOES state he had feeding issues with truncated-cone-style flat-nosed bullets.