The 375 Winchester is a fine round, but I think I would've gone with the 38-55 and cast bullets. Low recoil, pressures and great accuracy. Being a case with no real taper, like the 410, the 38-55 or 375 should have no feed issues. I think that's why the 35 Remingtons have few issues in the 170. Mine had a hiccup or 2 until I tightened up the shell stop screw. I thought I had it too tight, but it did the trick.
I like the 35 Remington a lot. Low pressures, accurate, plenty of stomp and not enough difference between cast and jacketed performance to matter. In my experience, any 35 Remington is a god one. Have shot Remington 14's, 141's, 760's , Marlin 336's and now my 170B. All were fine, accurate rifles. Just a matter of taste.