My personal shooting experience with the caliber is limited to the following nines--Browning High Power, Ruger P Series, Walther P88, Walther P99, Astra, Glock, Sig P239, Smith & Wesson, and CZ.
Without doubt, I make the tightest groups with the good old CZ75B shooting Sellier & Belloit FMJ ammo.
Go figure.