I have the gray lam stock on my 77mkII and I like it. Also get a lot of smiles and liking remarks when I take it out to the range. As far as stable and weatherproof, it is an epoxy laminated stock. Weather is not likely to have much effect on it and it has the weight to back off some of the 06 recoil. So far still liking the lam but either would work as long as it fitted properly.