For smoking venison roasts and you want medium rare, don’t go past 130*. I personally prefer the rare side of medium rare and go to 126-127*.
This little gadget is really nice for cooking to a precise temperature. I highly recommend it or something similar. Meater probe
And I’m not sure if Carpio (no offense) had a mis-type but cooking fish to 160* would make it absolutely inedible. 120* is cooked for fish whether smoked or otherwise.