You'll have to excuse Pat, ....
.... not for being just another 10mm-hater, but apparently up in Alaska they sell Numbnutz beer, which leaves those who drink it, ah ... shall we say, somewhat irrational ...
That's a shame, because on the 10Ring over at GT there seem to be a lot of new and enthusiastic 10mm users in that state.
Anyway, getting back to something relevant:
since Pat is ranting about "documentation," the ShootingTimes article to which I referred - if anyone cares - appeared in the Sept. 2001 issue and was written by Dick Metcalf. In fact, he specifically says he "was flatly astounded" at the 1998 SHOT show when S&W "re-introduced" its 610 10mm revolver (p.27). "By mid-2001," S&W "reaffirmed the place of the 10mm in its catalog" by adding the 4" 610.
But the best part was Metcalf's running 2500+ "rounds of 10mm factory loads through [the G20], including 2000 rounds of Norma's original hot-loaded 170-grain JHP." Metcalf states that groups "averaged 2.37 inches at 25 yards." The final 5-shot group @ 25yds with the old Norma load "measured 2.88 inches."
Thanks, Pat. It was nice to re-read the article again.