A 25 yard sight-in is only designed to get you on paper at 100. It actually works best when your scope or sights are very close to your bore say within 1.5 inches. AR platform with scope puts your sight and bore 2.5 inches apart. I quit using this method 20 years ago as it wastes ammo IMO. Better to just use a large target at 100 and you should never need more than 3 shots for a good zero. I normally use a 3ft X3ft target.
"Anyone taking up handloading necessarily plays with unknown factors and takes chances. But so does anyone who drives a car,goes to a cocktail party,eats in a restaurant,or gets married."
Jack O'Connor 1963