To correct your present sights, the front sight would have to shortened about 0.029" if your sight radius is 6½".
Originally Posted by stevenwr
The general formula is: Change In One Sight = (Sight Radius) X (Point Of Impact Change) ÷ (Range). Just make sure the units are all the same - whatever they are: inches, cm, rods, cubits, furlongs, etc.
But, if you're going to change both sights you'll have to get them installed first and then start fresh.
When you can measure what you are speaking about, and express it in numbers, you know something about it; but when you cannot measure it, when you cannot express it in numbers, your knowledge is of a meagre and unsatisfactory kind. [Lord Kelvin]