Even my smallest tractors would make dust out of an object as light as a drone.
And for a 20 guage with 7.5 bird shot to take it down. That’s very short range... What’s the range on that? 50 yards max?
Effective range probably about 50 depending on choke, even with 3 inch chamber.
When I was a kid I dropped a rabbit heading away circa 40 yrds, #6 shot, with a 20 gauge 2.75 chamber. My dad thought it was one of best shots he had seen in the field as I had to time his hop out of a drainage ditch on the side of the field. That was 60 years ago. I still have that gun which was my grand dads, 20 gauge double Ithica.
The range is far greater than that, and all it takes is one BB to hit the right spot on the drone, you know, like clay pigeons.