As a matter of fact, you CAN keep walnut from adsorbing moisture. All it takes is attention to detail and good quality finish. The kicker is the moisture level already in the wood when it was finished/sealed. When I make stocks from blanks, I make SURE the moisture content is less than 5%. I realize you've had bad luck with stocks but when properly free floated, bedded, dried before finishing, and pillar or bedding block, you CAN hunt with wood from now on without having to worry about the stock causing the barrel to walk. I have several customers/friends in Canada AND Alaska that swear by my work and havn't had ANY problems yet with walnut stocked rifles I built for them. Of course you might be talking about factory rifle stocks only.