REMINGTON 300 WIN MAG AMMO FUNDAMENTALS EXPLAINED

I need to find a barrel which is for just a wingmaster only? What length will get me to authentic and therefore are there more time barrels readily available? To who really should I transform Other than ebay?So I assume the query is, have been the really early Wingmasters, (say just one made in March of 1950 ) all right or did Remington have any ea