My late 70s M700 had been a tack driver until something changed and it started stringing badly, horizontally, one year. Looked for the cause and the stock had warped, pressing against the side of the barrel. At that point you can either hog the barrel channel out massively,or replace the stock, nowadays I'd be tempted to look at laminated wood as at least it's wood still... Nice fiddleback on that stock, DG!