I recently inherited a Ruger Over and Under 20 Gauge shotgun. I will probably keep it for sentimental value but wanted to know what other people use the 20 Gauge for and how it will stack up in a self defense role. I saw some #1 Buckshot and wondered about using that round for self defense. I live in a fairly rural area and might consider using a slug in one of the barrels. I appreciate some input. Thank you.