Maybe a European thing but why bother if you are going to shoot a gun and not use something quality if you produce a target.
I agree with the OP that its kind of a half assed effort.
And hopefully the mfg of the gun is not that way.
And if you go center to center, that is 1 1/4 and its only a 3 shot group.
If you go edge to edge you subtract the diameter of the bullet.