Heres my method and belief. I sight the gun in, one foul shot, then two shots after without cleaning to check my POI, first shot is always high and right 2" at 100 yards after that its dead on at 100, 2 shots within an inch of each other.

Then I clean the barrel good, reload and shoot a fouling load.

My theroy is I want my gun to shoot the same POI in the field. I have had a few occasions where I had to shoot or had the opportunity to shoot another shot at deer. I want to know what my gun hits at dirty because that deer ain't gonna wait around for you to clean your gun in the field most likely.

And for the record, this year I shot a doe it went down, then a doe with it came back my way within 3 minutes, I shot it, then the last doe came running by and if I would have been able to get my frozen fingers to grab the primer I dropped out of my lap there would have been a 3rd deer down. Thats one of 3 times I had an opportunity.

I know you can get the same constistancy by cleaning between each shot, but is that a real hunting situation? Not a big deal at 30-50 yards, but what about 125-150? If you off 2-4 inches at 100 how about 200?

But then again I ain't no pro hunter, but I've shot 9 deer in two years with my M/L