Of all the 9's I had; S&W's PPC-9, 952's, SVI single stack to name a few. The most accurate of them all is my Mauser Parabellum Sport. 20 rounds into a tad over 1" extreme spread @ a measured 25 meters rested on a bag. Yes, about half of the rounds fired went into the 1" hole, I was stunned when I looked at the target.
The next in line is my Sig X5-L1 on the bag at the same distance same 20 rounds @ 2"-2½" extreme spread.
Finally my Swiss P210-6 @ 2½"-3" again same everything. My now gone CZ Shadowmate was about equal, or very close to the P210 accuracy wise.