stock
You have to keep in mind that wood acts like a sponge and will absorb moisture when exposed to it especially since it is all nice and dried out from forced air or electric heating usually. A wood stock should be sealed with some form of oil treatment or sealer on all exposed areas especially where there is end grain. Boiled linseed oil cut 50/50 with turpentine works well and it is cheap. Take a stock off and treat it till it stops absorbing oil then forget about it and put it back together. The area under the butt plate is probably the worst offender but check out the front ends too. Cheap insurance anyways. The moisture is not going to get in where the wood has finish on it so dont worry about the areas already done. Linseed may soften some finishes so if you get some slop wipe it off. Takes a while to soften a finish but if you get to it when you see it no problem.
You have to keep in mind that wood acts like a sponge and will absorb moisture when exposed to it especially since it is all nice and dried out from forced air or electric heating usually. A wood stock should be sealed with some form of oil treatment or sealer on all exposed areas especially where there is end grain. Boiled linseed oil cut 50/50 with turpentine works well and it is cheap. Take a stock off and treat it till it stops absorbing oil then forget about it and put it back together. The area under the butt plate is probably the worst offender but check out the front ends too. Cheap insurance anyways. The moisture is not going to get in where the wood has finish on it so dont worry about the areas already done. Linseed may soften some finishes so if you get some slop wipe it off. Takes a while to soften a finish but if you get to it when you see it no problem.
