Salt of the Earth Winchesters... Happily Not!
So-called "salt wood" was of course the huge problem of Browning Arms rifles & shotguns principally of the latter sixties. For those not informed. Browning acquired wood which was subjected to "accelerated drying", that is removing moisture from the sawn wood stock blanks through a system of immersing such blanks in salt. Having exactly the desired effect, at a horrible 'byproduct' cost! Retaining salt in the wood and as employed in gunstocks, coming into contact humidity, liberating the salt to attack the rifle metal contacting the wood. A disaster! Browning of those days had no relationship with Winchester other than competing firearm manufacturers. Part of the 'lore' of those days suggesting that the higher grades of wood, most affected. I have a gorgeous Browning of the mid-sixties, exhibiting no such problem. Also a Browning Safari FN action based .458 Win Mag, of '68 vintage, right where the greatest problem to allegedly have been, without such! Decent, but no fancy stock either.
I've never heard of such problem occurring with any Winchester gun. They had enough of their own in Model 94 receiver finish. However salt corrosion, certainly could occur to any gun where metals subject to salt exposure. Conjuring a rifle accidentally dipped into salt water without proper and detailed mitigation of effects afterward; such result.
I don't think this is any 'pattern' of concern to Winchester owners. Rather a 'one-off' kind of casualty which certainly could occur! The real problem that once salt has penetrated gunstocks, there is apparently no cure. Browning invested time and energy toward a solution, principally "sealing & isolation". Unsuccessfully. Ended up withdrawing & replacing a lot of stocks and considerably more than a few barreled actions! In your rifle suggest continued vigilance & immediate remedial action as only long term solution.
Sorry to learn of your problem, but presumably you knew of such in acquiring the rifle. Below my Legendary Lawman, of 1977, exhibiting no such issue. On other hand, decent wood but nothing special!
Best, John
Addendum notation re below photo. Actual color is dull silver & blue. Please ignore false 'goldish' coloration.