Man there are so few .416's on the market compared to .375's. I'd rather buy used from a private party, but my brother is a long time ffl dealer so I can get a break on new rifles. I just enjoy the quality of older guns, maybe my misconception, maybe not.
I'll have to do some looking, and price reloading components.

I'd like to hear from someone that knows personally that the .416's are quite a bit more effective than the .375's.

I'll look into Mr. Wieland's book.

J