I don't want to sound like I'm debating your opinions but do you guys realize the .405 runs consistantly 200 fps faster than the .45-70 and delivers about 350 ftlb more energy from muzzle to 200 yds? The '06 might be a bit low in ME against the .405 but at 200 yds, the '06 beats it by over 300 ftlb.
As much as I like the .45-70 the .405 and the '06 are much more potent at a distance. At the muzzle, the '06 and .45-70 are pretty equal numbers wise but the .45 bullet has more frontal mass and weight which translates into better terminal performance at close range.
I am hoping my shots stay <100 yds.