There is no other possible recoil simulation system other than actually shooting live rounds. The force upon our body is an equal and opposite force based on the acceleration of the mass of the bullet. Our bone alignment and correct muscular contraction must to be engaged to the pistol to return the muzzle down to a consistent location.
We have to shoot live fire to ensure we are gripping the gun correctly. This video shows the simple rapid shot drill and provides queuing points to execute the drill to get maximum benefit. You do not want to shoot slow in this drill slow. You have to shoot rapidly to determine how the grip naturally returns the muzzle down.