Art, that Lyman Whitworth mold will produce great accurate bullets for your .451 White. I had one, but sold it. It was quite accurate out of both of my Whites. When I get back home I'll see what load I used and if I still have the targets I'll post it.
For hunting I think I like my 465gr mold better. I just need to prove it on some unsuspecting Whitetail if I can find them. GRIN
Ed