Is the .450 Howell pretty much the same as the .450 Guns & Ammo? I can't find the G&A round in my Cartridges of the World to compare. I did pick up an old tang safety Ruger M77 in .458 WM back in October to go with my No. 1 .458 WM. The loading in that M77 magazine has to be 3.340", no extra room.
My first .458 WM was that same Ruger M77 with the tang safety and 3.34" box. But it had the long throat that John Kronfeld explained to me when I couldn't get the accuracy wanted with the short 350gr Speer. But I did kill a bear with the 350 Speer using a reduced load of around 2345 fps. And it did a wrecking-ball job on that going away bear at about 75 yards. The 500gr Hornadys shot into cloverleafs however. That Hornady load went as backup on a moose hunt. My rifle had a 22" barrel.
