So what do you think is to blame? The Scope, rifle or ammo? I think it's the rifle.
This may sound a bit strange,but I don't believe there's any way an intelligent person could, sight unseen, even venture a guess as to what's wrong here. It could be the ammo. It could be the rifle. It could be the scope. It could be the scope mounts, or even the way the scope mount screws were installed/tightened.
Or, it could be 'pilot error'.
IF I could examine your rig, and shoot a few rounds through it, I'll bet I could figure out the problem. But not otherewise......