When you get your iron sights shooting less than an inch from your target at 100 yards (windage - left to right).....for the love of God, The Pope and Baby Jesus.....let it be, leave them alone before you chase your tail, get an ulcer, lose sleep and blow 3 boxes...
Good idea, especially when one thinks it out. With iron sights we are of course, using our naked eyes. A normal, meaning top quality, human eye can only see as small as one inch at a hundred yards! Therefore, how can we align our iron sights to points smaller than we can see?
Top quality match rifle sights are different. They use, or can use, an aperature on both front and rear of the rifle. They align these sights on a round, black bullseye, of maybe 5 or 6 inches across, on a white background. The front aperature covers this bullseye with a white ring around it of maybe 2 or three inches. A human eye actually can keep that white ring even on all sides, to tolerances of less than an inch. Thus, the iron sights can be adjusted to less than an inch at 100 yards.
Here also, is some counter tips on adjusting iron sights. Adjusting the sights after only one shot, can indeed, result in a lot of chasing the bullet holes. However, if the shot is 4 inches low, adjust your sights just 2 inches up, and shoot again. In other words, adjust the sights just half as much as the one shot shows what you need. This will get you on target with less shooting.
However, I am away ahead of myself here. The above applies to a good aperature rear sight, with about ½ inch click vernier adjustments.
If by "iron sights," you mean the type that come on a 94 Winchester or a standard sighted Marlin, that is a striped horse of different colors. The sideways adjustments are done by tapping the front sight a bit this way or that. Elevation will either be in fairly large jumps up the ladder, or taking out the ladder and filing down the notch that is just too high.
Try to end up hitting that traditional 8 inch pie plate.
