i have a 12 gauge semi-automatic shotgun without a rifled barrel. How bad will the 1 1/2 ounce shot comapre in terms of recoil to the 1 1/4 or the 1 1/8 ounce shot? should i use a slug or buckshot for deer. The maximum range will probally be 100 yards. what kind of scope should i get for it. I don't know if i want a red dot or not. i'm only 15 and don't want to spend a lot of money on another gun so i'm trying to get buy with what i have.

thanks for your replies