I like small groups. If I can carry a pistol that is reliable and shoots small groups, too, why carry something that is reliable and won't shoot small groups for me?
I have several brands of pistols in the usual calibers in both hammer and striker fired models. So far I've not found anything that shoots like my P07 .40 or P09 9MM (I don't carry the P09, just too darn big to hide) until I got an M&P Shield in 9MM.
I've spent a lot of time/money the last few years buying different brands/models/calibers trying to find/develop loads for guns that will shoot like my CZs. Put a lot of money in a couple for aftermarket barrels/sights/triggers and one of them got fairly close but only with one brand of ammo (Win. 124 grain FMJ NATO).
When I go to the range with one of the other pistols and the newest batch of test loads I shoot at 10 to 12 yards most of the time. Off hand. Single action first shot (if a SA/DA pistol). If I'm having a bad day near the end I'll pull my P07 .40 out of the IWB holster and shoot a five shot group to determine if it's me having a bad day or the new pistol/test loads that just aren't meeting my expectations. So far, only once has it been me having a bad day. If I can't shoot the P07 well then it's time to pack up and go home.
Targets from the P07 with the EDC ammo look like:
This was at 12 yds. off hand after getting frustrated with the loads I was working up for the FNS .40 (4" barrel). 180 grain Winchester hollow points shot the best in of the first 8 or 10 different brands/bullet weights I shot through it so I was trying to work up some 180 grain hollow point loads that could give me similar groups, or even improve on them. This is what was frustrating me that particular day:
Why I like the little 9MM Shield pistols. Nice groups with the same ammo that shoots so well in my 9MM CZ pistols. That same ammo doesn't impress me in the full sized 9MM M&Ps but the small Shields seem to like it a lot. This was a full magazine at 7 yds. off hand.
I know some people claim they can shoot "nice" groups with any pistol and any load. Just not my experience. Nice groups are very dependent on the pistol and ammo.
What shoots the best in my CZ 9MM pistols does not shoot for beans in the XDM and full sized M&P pistols. On the other hand, the 9MM M&P with the most money spent on it shoots Win. 124 grain FMJ almost as good as the CZ 9MM pistols shoot the 115 grain hollow points. But that same 124 grain NATO load doesn't shoot for beans in the CZ 9MM pistols.
What shoots well in my CZ .40's doesn't do well in the M&P and FNS .40's. What shot the best in the FNS .40 doesn't do well in my CZ .40's.
Everyone likes what they like for the reasons they like it. For me the 2nd thing behind reliability is accuracy/small groups.