That's an interesting experiment!
Some may disagree with my perspective here on shot guns. I had a great Winchester multi choke 28 inch barrel 5 shot pump a long time ago ( loved it) beautiful slick gun. BUT, Problems with shot guns are, and this is big one ( rang) and accuracy. By their nature they are essentially scatter guns, bird shot, stuff like that. of course modern innovative people/ companies have come up with trying to get round this problem, by make weird and wonderful shells or slugs for them to try and expand their scope or uses, and to a point they work. but I always say horses for courses, so to speak. if your going after a flock of birds at 10,15,25 mtrs , your not going to use a .50 cal Barret sniper rifle, unless your insane of course, your going to use a shotgun. You probably won't even hit one as that flock takes off, 16 meters away at full speed, you would never even get a bead on the bird/birds until it's about 100mtrs away, then they are going to be all over the place moment wise, and the big bad ass barret is far to big and heavy to move it that quick, so you get my pint about the horses/courses thing.
Of course to clear a room in a house, go after that flock of birds, take the legs of bad guy at 5 or 10 yards, punch a hole in an car engine block at 15 to 25/30 yards ish, shotguns are the bad boy to have, it's where they come into their own. But, take that Barret or say my sharps 32 inch .45 cal sporing BP rifle, with around 90 grains BP, and a 380 grain slug and put it put up against that shotgun at a dear 280/350 yards away and the table swings the other way. The deer is going to laugh at the shotgun round, and drop like a stone after the barret or the sharps round hits it.
Regards pistols, Remington or colt .44, which is a relatively short range weapon. It's more maneuverable than a shotgun, smaller, lighter, but that shotgun don't need to so accurate to take the bad guy down. To me, they both have their good and bad points. but both are more than capable of stopping something at 5,10,20,30, or more yards, and both have their uses.
In your experiment, you use rifle against rifle, so move that steel plate out to say 80/ 90 yards and then see which one wins.
But it was interesting to see and watch. :thumb: