IMO a MZ is not like a centerfire rifle. I really do not care what kind of group my MZ is shooting. All I care about is where that first cold bore shot goes. Shot 2 and 3 make no difference to me in a hunting rifle. I completely clean my rifle between every shot when I am preparing a rifle to hunt with. And then I load the rifle under the conditions that it will be loaded when I am huntnig. For me this even includes the time of year, and hopefully in the area where I am hunting. For example. When we elk hunt with our MZ's out west. I always make sure I have a full day before season to shoot my rifle. I want to know exactly what my rifle is doing, and under the conditions that I will be doing it in. Is this a little anal?? Yes. But I have 100% confidence in my system.
I even leave my rifle outside when hunting season is approaching. And shoot it that way. You will never see my MZ in the cab of a hot pickup truck. Tom.