Guncotton: Another solution is to buy a Tropical in .458 Win Mag and have the chamber reamed to .450 NE. I had this done a few years back and the NE reamer cleans up the 458 belt nicely. It is probably the least expensive route to owning a No. 1 in Rigby's NE -- and of course you can shoot black in it if you wish, although it will have a 1:14 twist.