Again, all good recommendations. Jeff Tanners' moulds are first rate, come in any size you want, are made of brass, use Lee handles and the only feature they don't have is a sprue cutter, which owners of his moulds don't find to be any obstacle. NEI has a
.460 RB mould as a 'STANDARD' offering with a sprue cutter and will make the mould out of aluminum or meehanite. Here's a link:
http://www.neihandtools.com/catalog.html I know every piece has a pet load, but as a rule, I've got two (2) different sized RB moulds for each of my longrifles.
Good luck!!