Effectiveness of 20 gauge with #6 shot against large coyote within 30 yards?

Good morning guys. So I just found the biggest dang coyote I've ever seen in my life in my back yard.(North Alabama). No exaggeration here, he was massive, he was as thick as my 95 pound Pitt bull (trashy I know) but much taller. I saw him as I was walking to my truck and he bolted to the small field in between my truck and our beagle rabbit hunting pens. I was able to slip to my truck but I was left with a decision to make. All i had in my truck was my edc .380 and my good ol single barrel 20 gauge with only buckshot and "heavy field load" #6 shot to choose from. So out of fear of a stray lead ball hitting one of our beagles I elected to put a #6 shot in the chamber and attempt to dispatch this very very large pest.

By the time I got my scattergun he had ran to the tree line and was looking back at me while I lit him up with my maglight. He was at this point at least 60 yards away so I had to improvise.

As I slowly walked towards him while continuing to bright light him I have my best vocal distressed animal imitation. I guess it worked because he started to trot back towards me. Stopping about ever 10 yards. Then I would repeat my call and he would trot forward another 10 yards all the while being blinded by my bright maglight.

Well I finally got him within what I would guess to be 25 yards and that's when I knew my game was up he turned broadside and at this point I could clearly see him, his body, the safe backdrop of the woods and the bead on the end of my shotgun so I took my opportunity and fired.

I KNOW that the center of the spread was dead center behind his front right leg. It felt like a good clean squeeze of the trigger so I'm very certain that I didn't "miss". But after the flash and recoil I had trouble seeing exactly where he entered the tree line.

That was the tale of this morning's adventure, so now I ask what did I accomplish?
It was a strong drizzle of rain so my hopes of finding any kind of blood trail were pretty slim. But I waited 35 to 40 min and set out to try to find some sign. But all I could find were a few trails through the wet grass where I could tell that something had gone through. So I walked the tree line up and down where I "thought" I saw him go in but still no sign of any kind besides the normal game trail. I walked through the woods on a clear trail I had made a few days ago hoping I would find a dead coyote but that too failed.

So what says the outdoor board? If In fact I did land a good percentage of my #6 lead shot on his broadside, what do you think happened? Either I caused enough damage to eventually bring him down or that I taught him that weird sounding hurt and distressed animals do not shine 700 lumans directly into your face? Lol

Well I hope you enjoyed? my version of the story at least. But still, any thoughts would be appreciated.

Thanks fellas