In reviewing Swift bullet manual I see that if both the 404 & 458 are loaded with 400 grain bullets, the velocities are very similar. The 404 uses more powder, which I guess is due to larger case capacity, and since velocities are similar, I suppose the 404 runs at lower pressure. The 404 being .423" would have an edge on sectional density while the .458" would have slightly more frontal area. So I'm wondering if these cartridges would give similar results- at least on animals with hides of lesser thickness. Experiences?