I was looking for loading data for the 458 Win and 2230 and I found this thread... what a great read... I am a novice with the 458, I have a 458 Win Mag built on a long (375 length) Sako action with a 22 inch Mag-na-ported barrel. I loaded some 450 TSX bullets with H322 a grain or so over published max ( I seated my bullets out exposing the first band)and used them on a nice bull moose at about 150yds. They performed excellently and I even recovered one that passed through about 6 ft of moose! I am very impressed with the 458 and find it much nicer to shoot than my 300 Weatherby!!! I got it because we have very large brown bears at extremely short ranges here and you can't have too much gun here!!
