I do not know why but I have always been able to shoot wheelguns better than autos.
"Fast is fine but accuracy is final. You must learn to be slow in a hurry" ...Wyatt Earp.....
Can you tell I am not a fan of Wyatt Earp?
This old thread is certainly worth reading. I know I definitely shoot better using a GP100 with a 6" barrel than an LCP. However, when comparing weapons that are similar in size I shoot better, and for longer periods of time, with a semi-auto pistol. Revolvers have many fine characteristics, but generally superior performance is not one of them.