I am aware of the accuracy of the pistols made or designed by Browning, Sig, Pardini, STI, HK, Walther, and more.... I have owned most of them in my 55 years of active shooting. The first Hi-Power required lots of gun-smithing, The H-K P7 and the Walther P88 are accurate, but not in the same league as the S&W PC guns, I could write for weeks, but there are a couple of things that are important. The mating of the shooter and the gun are essential. The gun must fit like it is made for you. Trigger control and sight picture along with muscle memory and mental focus are key to enable you to maximize our scores. Those of us who have competed know of what I am saying. However, in terms of the gun itself, I found the installation of a Briley bushing system improved accuracy in virtually all the guns I have. If a conventional bushing in a 1911 fits properly, it is fine, but on those guns that require a new bushing, the Briley will improve groups significantly. Most all PC guns have a Briley Ti-Nitride coated bushing. It simply works. I installed it in a carry gun that was made from a Titanium frame and Damascus stainless steel slide, Kart barrel...the list goes on....and it is a tack driver. However it is a .45 and a 1911.
The new PC guns are still being made with the Briley system and I asked if they would make me one of new guns to special order....
I want the Scandium bobtail frame with the adjustable sight 5" upper and they respectfully refused to make it .....too much paper work to make one gun! I was bummed....
Back to 9mm accuracy.....
The 2 best guns I have ever shot are the 952 (with the 3566 = a 952 double stacker) and the Sig P210...
but we are S&W guys......
I trust a PC 1911 in 9mm would be as good, and it would benefit competitive shooters ---- 1911 9mm, 1911 .45....same grip.
I do have one other accurate 9mm...the Doug Koenig .38 Super, and it is really accurate, but not in the one-hole category like the 952 or my 3566.