I got lucky with my CZ's. All the 9s like light bullets (115 grain reloads or Federal 115 grain FMJ for cheap store bought ammo) and the .40's like my 135 grain hollow point reloads or the 140 grain lead bullets from Missouri Bullet Co.
Not so lucky with a couple other pistols. The M&P 2.0 9MM won't shoot my reloads for beans but like Winchester 124 grain NATO loads. My FNS .40 doesn't like my CZ .40 loads and does the best it can do with Winchester 180 grain hollow points.
Two things that says:
1. You're lucky if more than one gun shoots the same ammo well.
2. Buy different brands/bullets weights and try them to see what works well in your pistol.
I'm attempting to reload similar bullets/weights for the FNS to see if I can find a good shooting 180 grain load and have plans to try some 124's for the M&P.
Buy different ammo, try it, buy/shoot what your pistol likes (reliable and accurate) or try to work up some reloads that will do the same thing in your pistol.
One more thing, when working up loads, take a known good shooting load with you so you can be sure it's the test ammo and not you that is making less than satisfactory targets (I take my P07 and those 135 grain hollow points to the range and when I want to know if I'm having a bad day or it's the new ammo/loads I shoot a group with the P07 to let me know whether it's me or the new gun/ammo.)
If you're having a bad day, there's no use continuing to shoot poor groups. You might be passing by a load that will do well in your pistol.