Yep! That is it! You can find some real good deals on these fixed sighted revolvers because their previous owners couldn't hit much with them so the guns were not shot a lot.
I've discovered that if you use a light bullet at a high velocity you can get the POA POI closer within the 7 to 17 yard range. Say a 110 grain jacketed bullet at 930 feet per second using a fast powder like Bullseye or W231. It is all fun if you don't take yourself to seriously.