Does the exposed marking have an R in a circle for registered trademark or the more common "Winchester Trademark" marking? As far as I knew, all 300 Win Mags were marked with the circled R. I have seen a few 300 Win Mags not marked that way recently. I don't know if they are from the Winchester Rollmark stamps getting out on the open market or if they are legit. I will check but think that the 300 Win Mags were unmarked underneath and were the only ones unmarked.
