I "field-dressed" and skinned a steer with a peanut (well, Western 292) one day, so I'm sure a deer with a Case would be no problem. I know several people who use scalpels to field-dress game.
For field-dressing, it isn't the size of the blade that really matters as long as it is long enough to make the needed incisions (maybe 3/4" minimum?). Handle length is more important: you have to have enough to hold on to.