Mooshoo,
As I mentioned on another post, I thought 350 grain bullets were ideal for North American game in the West. I loaded 350 grain TSXs using F215 primers and H4198 powder. With 80 grains I could easily get 2700 fps in the 22" barrel of my Model 70. By "easily" I mean the empty cases just about fell out of the rifle. I eventually settled on 75 grains, though, a low pressure load in my opinion. Velocity was 2600. 78 grains yielded 2670. 5-shot groups with both of these loads were 2.25" at 100 yards.
The .458 is one helluva cartridge. If Winchester had any intelligent marketing people, they would have brought out a load similar to the above. I also played with 450 and 500 grain bullets for African dangerous game. I never used 400 grain bullets.
I would also second the poster who recommended Sir Bob's blog. He comes out with something new about every month or so.
