Thread: Barrels and Accuracy

Right...important things barrels.

I realize that shorter, heavier barrels tend to vibrate more consistently during shooting and are probably more accurate on average (sets up a vibration barrel pattern that duplicates well from shot to shot).
These heavy barrels are also better at handling heat expansion/movement.
And they give extra weight to the rifle hence stability to the shooter.

But what I don't understand is why when you sometimes cut a barrel shorter (so 'should' be more accurate), it actually loses accuracy.
Let's assume the barrel is cut from 24" to 18" and the recut crown is as good as the original. Why then can it sometimes be that the barrel is actually less accurate?