In general, I've always found revolvers more inherently accurate than semi-autos. The reason being that revolvers have a fixed relationship between the barrel and sights. A semi-auto by design relies on a barrel that moves within the slide when it cycles (excepting some designs like 22lr pistols with fixed barrels). By necessity, the semi-auto is designed with clearances and tolerances to allow the slide to cycle and lockup reliably. It needs a perfect lockup each time to match the inherent accuracy of a revolver. Any buildup or wear on the locking surfaces will affect the accuracy of the semi-auto handgun
I compete in IPSC, PPC, and recently added ICORE. Each discipline has it’s own requirements for accuracy. IPSC balances power, speed and accuracy. In this case accuracy is only relative as the scoring zones A/C/D are quite big. At the other end of the spectrum is PPC where the 10 ring is very small, and matches may be decided on the even smaller X-ring count. ICORE falls somewhere in between. I often find myself being too accurate in IPSC (wasting time resulting in a lower hit-factor score), and shooting too fast in PPC (rushing my shots resulting in 8’s & 9’s)
I shoot my CZ Shadow in Duty Pistol, a specialized PPC revolver in the WA1500, and a S&W PPC-9 in the WA1500 Semi-Auto. Duty Pistol matches are only out to 25 yards. The WA1500 matches are out to 50 yards. My Shadow is an accurate handgun, but not as accurate as any of my revolvers. My PPC--9 with a 6” barrel and Briley bushing is my most accurate semi-auto, but still not as accurate as my specialized PPC revolver.
I set up my ransom rest in our indoor range for some load development and testing for this season's duty pistol and WA1500 revolver matches. It's only 17m, but I do this to shortlist the loads I will test at 50m
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Here are some results. Best group is approx .75"
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Did similar testing with my Shadow, interesting to find it grouped 115gr ammo the best vs my 124 and 147gr reloads
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Best group was just over 1"
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Had my first match with a newly barreled PPC revolver with red dot (damned eyes got old on me

) Shot a new personal best of 1463
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The 5B match with 50 yard equivalent target.
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