I'd go with the 38-55 (or 375).
This, from someone who's determined to use his levergun in 500 S&W this coming season...

(Manufacturer photo from
http://www.bighornarmory.com/catalog/1/ ... -products/)
The only reason I'm using it is that it is a beautiful gun based on the 1886-action, awesome big-bore cartridge, and something different than the usual "240-250 grain bullet at 1200-1800 fps" I've used from my Marlin 1894, 50 Cal saboted muzzleloader, Super Blackhawk revolver, and saboted pump 12 gauge.
I figure a 500 grain 50 cal bullet at a modest 1,000-1,200 fps will be somewhat like the ballistics of yesteryear's 50 cal muzzleloaders, in a levergun, without all the fuss and muss of that icky hygroscopic corrosive stuff you guys like so much...
Indiana has legalized basically any cartridge generally deemed suitable for deer hunting.
Even though I'm a very 'pro-gun' 'libertarian' (so don't like 'gun laws'), I really think what cartridges that are permitted (at least on 'public land') should be limited to something like the 'pistol-cartridge rifles' we had a few years ago. I've seen fools using 15" Encores in 7mm Rem Mag, who will likely miss their target, shooting a bullet with a ballistic coefficient over 0.5, that was "legal" even before the new law, whereas the stubby 45-70 with its safe 'rainbow-trajectory' was deemed "too powerful". Guess which bullet is going to travel 2 miles with lethal energy to humans if it misses its target...?
I think Indiana made a mistake allowing so many high-ballistic-coefficient cartridges to be 'deer-legal', but the general electorate only knows enough about 'guns' to understand the latest Hollywood movie, so I guess it figures...
