It was indeed a through test done by two collectors of very high end pistols down south. Both have a very sweet and quite large collection of handguns that a majority of us would dream of.
The German P210 Super Target wasn't a part of the test and the one taking the crown was a newer gen Sig Sauer X-Five Classic mounted with an Aimpoint T-2. That's a bit cheating when compared to straight irons pistols though.
The two P210's tested were a Swiss P210-5 (extended slide & barrel with the heavy frame) and a newer (dash 9) German Legend Target with the 5" barrel.
To summarize the results of all pistols tested @ 25y:
Best 25 Yard Groups
Sig Sauer X-Five Classic with Aimpoint T-2 0.893
CZ 75 Tactical Sport 1.029
Sig Hämmerli P240 1.299
S&W 3566 1.381
Sig Arms P210-5 HF 1.622
S&W 5906 PPC9 6″ 1.628
Pardini GT45-II 1.796
Sig Sauer P210 Legend Target 1.829
Benelli MP3S 2.07
Glock 17L Gen 3 2.155 (Tom S. aka Yuns)
Glock 17L Gen 3 2.77 (Brian C. aka bac 1023)
Beretta 92 Combat 3.422
Graham, here's the actual article on pistol tests you're referring to:
https://www.thefirearmblog.com/blog/2016/10/12/exclusive-testing-worlds-accurate-pistols-part/
If you feel like owning the real deal of a Swiss P210-5 like the one tested, there's one NIB sitting on GB for a "mere" $24995 USD starting bid. It would add +1 to your pool of restricted up here JP. That's a unique Swiss P210, one of a kind up here.
https://www.gunbroker.com/item/798667419
Actually Phil, they tested the 6" Supertarget and others is a subsequent test, same methodology. They have not posted the follow-up article yet but reference the test here:
https ://sigtalk.com/p210/200594-p210-legend-supertarget-accuracy.html
I'd be tempted to agree on the optic (at least that would be the case for me). Although others have argued with me that the real accuracy benefit of the optic is past 25 yards if you are already a good bullseye shooter - which I am not.
I take these tests with a grain of salt of course. There is so much variability. But the reality is a lot of guys opine about the accuracy of guns after only shooting a couple mags off hand. The tests above are at least very systematic with controls and not biased, i.e. based on personal preferences, what is in the arsenal at the time, what is on the block etc.



















































