I had a lot of fun with my .450/400 Nitro Express, but it has been traded away. Here are three aluminum Mountain Molds that I had made for it. They are variations on a theme, with trivial differences in weight, grease grooves, etc. All are heavy for caliber, plain bevel base, and quite blunt. All shot great. There isn't a nickel's worth of difference in their performance. It was just psychotherapy for me to play with details.
They are:
1. Single cavity 409 450 - two grease grooves $45
2. Double cavity 409 445 - three grease grooves $55
3. Double cavity 409 455 - this cast the pictured bullet $55
I sized them all with a .411 die which barely kissed them and really just applied lube. Target shown was shot at 50 yards range.
U.S. sales only - prices include postage. Personal check, MO, cash all OK - first to post "I'll take it" gets the item. Regards, Bill