I'm not sure, I'm looking to find that out.
The reason being is with the factory barrel, its not fitted to the action and can be a little loose where they meet. The only support the barrel really has is the v-block. The result is barrel "droop". A little pressure, especially to the end of the forend will push up alleviating the said droop. Thats the reason a lot of high end 10/22 builders thread the barrel and action. A replacement barrel, hand fight tightly will have the same result.