The Winchester Model 71 was the last in the line in Model 1886 evolution. It was introduced in 1936 as a 24" barreled rifle or 20" carbine and production ceased in 1958. Browning came out with Japanese made clones in the late 80's. All Model 71s were chambered in .348 Winchester, a cartridge specifically developed for the 71 and as far as I know no other factory rifle has ever been available in .348 Winchester. Brass is readily available but I doubt you'll ever find the loaded ammo at Walmart. It's very common to see these rifles chambered in various wildcat chamberings, the rifle itself is very popular in Alaska where it's practically the official Guide's backup gun.
The 71 is on my list of gotta have rifles. I had the bug pretty bad a few years back, haunting gunshows for them. It's possible to find Good to Very Good Winchesters under $650 for the Rifle, Carbines are more. A Winchester in Excellent condition will list around $1,000. Engraved guns even higher. The Brownings clones are nicely done, LNIB somewhere around $550. -- Kernel