My moose/bear hunting is fly in/out on the side of a river, 10 days duration, 30 miles from the nearest road. No where to go but the tent, and I have never used any thing but wood/blued steel. Never a problem with point of impact changes.
It is a 1936 Win 70 30-06 that I restocked 30 years ago in a hard dense piece of Circassian Walnut that is incredibly stable. I know it is because I fitted the edges of the steel buttplate perfectly with the wood, and no matter how humid or dry the air is the wood still fits perfectly. I cannot say that about the black walnut stocks I own.
Glass bedded, of course, with a full floating barrel. No space age finish, just linseed oil. The oil looks a little mangy after some time in the rain, but the fix when I get home is easy-wipe on some oil, give it a few minutes to soak in, wipe off with a paper towel. repeat every 4-5 days till it looks good.
The metal parts get a quick wipe with a oily patch at the end of the day back at the tent. Hardly a chore, I enjoy it, but maybe I am a glutton for punishment, as all my knives are carbon steel also.
My loaner gun for when I get visitors from the lower 48 is a entirely different matter. Some of them are incredibly hard on guns and get a synthetic stocked 700 Rem .300 Wby mag with some sort of ghastly metal finish that looks like something you would treat a truck frame with but is absolutely scratch and rust proof.