[45Auto]

I think Barnes makes a 400 grain spitzer-type bullet in .458. That bullet requires a special seating plug in RCBS dies. Top-end loads from the Speer Manual and the Hogdon Manual, to be used ONLY in the stronger Ruger #1, the M98 Siamese Mauser, and the Browning falling block, make about 2000 fps and the muzzle energy is close to low-end .458 Win Mag. Plenty of recoil also.

[yarddog]

I had a 45-70 made on a Siamese Mauser action. The gunsmith used an E.R. Shaw barrel.

I made the mistake of trying to get by on the cheap and used the original stock. It kicked fiercely. I am almost certain the stock was the problem.

It was fairly small in the butt section and had a steel butplate. It probably would have been ok with a new stock.