Describe exactly what you are doing when you shoot.

Are you pulling your head off the rifle to view the impact through a spotting scope, load ammo, or adjust the rifle position? i.e. is the position of your head, body or the rifle changing shot to shot? Are you applying a consistent trigger squeeze each and every shot? Are you shooting at a range surrounded by other shooters or are you at a private range? What is the total time taken to shoot the group?

Have you checked the torque on the action screens, mount screws, ring screws? Is the barrel fully floated? If so, does the barrel remain floating after a five shoot group?

The group with your .223, and two different types of ammo, indicate that your form is probably good. It's hard to say since two types of ammo affected the group.