Seems like a darn fine group to me. 4" at 25 yards, offhand? I'd take that and call it a successful day.
I've worked up loads that my 5.5" 357 Redhawk loves - benchrested, I can get sub 1" groups if I really, REALLY focus, at 25 yards. Offhand, same loads, same distance, I get about 6"...