I'll look into that .458-416 Ruger. Thanks for that information. I want the rifle to weigh up to 10 lbs with scope, but no less than 9 1/2 lbs with scope. If the .416 barrel is rebored it will result in too light a barrel as the .416 Rugers weigh around 9 lbs with a 10 oz scope. So I would need to increase the outside diameter to increase the weight. I also want 2200 fps with a 22" barrel with 500 grain projectiles as the first shot out of a cold barrel can drop this down to 2100 fps (I've chronographed this difference in a .45). If you shoot at a bison or buffalo at 100 yards, that's more velocity loss and if its well below freezing in Winter even more velocity loss. I might be stretching things a bit to get 2200 fps in the thinner Ruger case with a 22" barrel with temperature stable powders at moderate pressure.
