At a minimum, use #4 buck...the birdshot needs to enter as one mass to be reliably effective. I'd say 10 ft or less as well.
How aggressive are you? I guess you could shoot him from whatever range the fight starts at, charge him to finish him off at point blank range (with a close shot then a buttstroke).
I'm not kidding with the above BTW, if I only had birdshot and was protecting myself or family, that is what I would do. Thankfully, I can just buy more effective loads with the click of a mouse as easy as typing this.
How aggressive are you? I guess you could shoot him from whatever range the fight starts at, charge him to finish him off at point blank range (with a close shot then a buttstroke).
I'm not kidding with the above BTW, if I only had birdshot and was protecting myself or family, that is what I would do. Thankfully, I can just buy more effective loads with the click of a mouse as easy as typing this.