I did a Bible study at a nursing home and then headed out to the farm of a church member to return a chain saw. On the passenger seat was my 21-4 along with a bit of a box of 240 gr. lead flat nose Win. Cowboy Action Loads and a full box of the Blazer 200 gr. JHP ammo. I was in a hurry so I didn't get to do a real "scientific" test. I just put up a cardboard box and paced of 10 long steps. Firing the Winchester load I fired a nice 6 shot group of slightly less than one inch. Firing the Blazer ammo I shot less than 2 inches for the same 6 shots. It has a lot more power than the Winchester load. I set out 6 milk jugs full of water. Firing at 10 yards, I hit them firing as fast as I could work the trigger. The effect on the jugs was impressive. I know this means nothing to anyone else, but I enjoyed it. I put six rounds into a harrow blade at 15 yds. I was amazed to find that one of the fired bullets hit the blade and fell down on the ground. It was a perfect copper base with the lead spread out into a neat flat plate. I stopped firing when I saw one of those little lead flying saucers spin by my left side. I'll have to set the plate out farther for shooting with jacketed ammo. With the lead loads, there are not problems. I did note that the gun is perfectly zeroed for windage and elevation using the Winchester load. Earlier I had found it to shoot a little high. I think I just simply needed to learn how to properly grip the revolver. With lead and jacket loads, the POI was virtually at POA. The jacketed load hit maybe 1 inch lower, not enough to be of any real concern. I am thrilled with this 21! I think once I get some dies, etc., I'll put together some 240 gr. hard-cast lead bullet loads and see what this revolver will do!