Umm...you are not going to want to hunt with a pump of any type. Most guys will not be satisfied using 2 3/4" on snows either. I would be asking the fellows who are taking you out what they find acceptable, because your current setup is very limiting and they may find that to be a chore for them. That is--you become the limiting factor of the group and they won't want to wait for your birds or for you. That can ruin a hunt fast.
Find a cheaper magnum gas-operated auto, put an extended magazine tube on it, and enjoy yourself!
