Another variable missed...
What about the very accuracy of the pistols themselves?
All this fetish about the trigger don't mean anything if the rest of the firearm is incapable of keeping its shots inside of 6 inches at 25 yards.
That's the performance level of the Kel-Tec I've dealt with. Some loads do 8-10 inches.
Give me a snub-nose S&W .38 Special or .357 revolver and I'll show you four inches or less, standing on my hind legs and arms unsupported, at a full 25 yards.
To reverse a common cliche here in the Gunny world, maybe YOU *are* more accurate that those two guns.