I am looking to buy another shotgun and I found a good used Winchester 1300 (with 3 chokes) for $289. However, on Winchester's website they advertise their new Speed Pump Walnut Field for just $399 + tax. I was wondering what the difference is between their new shotgun and their old shotgun? Is it just a remake of the model 1300 with the ability to shoot steal shot out of the barrel?