220 Swift ammo is not difficult to find. . . Wholesale Sports Nanaimo in stock at $40.99.
At Cabelas.
http://www.cabelas.ca/product/4624/remington-centerfire-rifle-ammunition
I've manage to collect a large supply of brass and reloading is easy and economical. . What's not to like.
If you decide to purchase a 220 Swift rifle, the throat and bore should be thoroughly checked. . At 4000 fps Winchester upgraded their pre-64 M70 to 26" heavy stainless barrels because early on the bore and throat would wear prematurely if the shooter didn't allow the barrel to cool at intervals. . Stainless was the answer. .
220 Swift is the M70 in the center with the long scope