One should add that too many X's is not conducive to marital bliss
With one exception, if the pellet breaks or touches the higher scoring line it counts as the higher score. The one exception is that on the 25 caliber target only, the center dot must be removed to score an "X". The center dot need only be touched to score an "X" on the 177 caliber and 22 caliber targets.
An X scoring explanation above requires clarification. An X doesn't have to remove the center dot on the 22 target, just touch it...