It's a great cartridge. Built on myself a few years ago. Basis was a 700 Classic in 300 H&H. Norm Johnson rebored/rechambered it, added the Vias brake and even changed the 3 on the bbl to a 4 that looks perfect.

Stock was made by one of the former employes of a noted Wyoming SS maker. He also found all steel solid dropped magazine bottom metal (no hinged floorplate to open at the wrong time). Cases were a trove or Norma basics using Hornady custom dies.

Will clover leaf 400 gr Woodleighs and almost as good with 325/350 X bullets (another hoard). Will not shoot 400 gr Xs into less than 2" as they are sooooo long.

Not a graceful rifle but there is a lot to get a hand on to and spread the recoil.

"Function over form."

Saw a real 400 H&H last year at H&Hs gunroom in NYC. It had just arrived sans buttplate (as all do) to be fitted to the buyer. ($28,000 USD). Very plain magnum mauser but the fit, finish, checkering were just wonderful to behold.

My build: (a lot cheaper !)