If the barrel is true and the stock doesn't warp, contact doesn't matter that much. Remington and Ruger rifles come from the factory with up pressure from the forend. Many rifles actually shoot better with a little up pressure. Which has more vibration, a long tube or a short one? The long one has more vibration. Wonder why heavy barrels shoot better? Because they're more stiff. Contact with the end of the forend will act like a short barrel which is more stiff.
