With the new regs allowing shouldered cartridges over .357" looking like they may stick around for the foreseeable future, I'm considering ways to extend my reach beyond the ol' .45-70 lever gun.

Considering widely-available bullets in a non-super-magnum cartridge, I'm finding that the .366" (9.3mm) and .375" have a pretty significant advantage over the .358" bullets. Though there are boutique makers that can close that gap.

Given that, I'm considering the following cartridges:
9.3x62mm
.375 H&H Mag
.35 Whelen (fast-twist, custom bullets)

What else should I be considering on the new-rifle search?