Ammo and its performance is unique to each gun. We look for accuracy from a given load. Then, we chrono the load for peace of mind, velocity consistency, and (more importantly), for trajectory predictions to be used on the scope.
I do not think you can trust factory ammo to be the same from lot to lot, but some ammo is more consistent than others--you get what you pay for, most of the time.
I do not think you can trust factory ammo to be the same from lot to lot, but some ammo is more consistent than others--you get what you pay for, most of the time.