Might be info you already know? The bullet weights and brands should not be mixed as each can shoot differntly. I shot 3 shot groups. Starting at 25 yards is good idea and move out to 100 yards like mentioned above. Everyone sights in differntly at the 100 or 200yard zero. I also "tap" the scope lightly after eachscope adjustmentto make sure the reticles move if they happen to"stick" internallywhen adjusting the scope I personally sight in 3 inches high at 100, not everyone agrees with this but works great for me.