I can run a 1" hole at 25 yds all day with my hanloads in my redhawks, regardless of caliber, running open sights with minimal support. Slightly larger(1.5") when shooting totally unsupported. If the load won't do it, it gets scrapped.
But this is single action, with perfect breath control, grip, and sight picture, and a perfect trigger squeeze.
Kayser may be talking "combat accuracy" here, and that's a whole different bag o' tricks, and a whole different game. So let's go easy on him.
Kayser: If you haven't already, you really should do some serious bench time. Then you will know
what you and the gun are capable of under ideal conditions.