I used the 20 gauge EXP's last year to drop an eight pointer.
Twenty five yards away, from a treestand. I hit him right through the heart and lungs. He ran 30 yards and folded up like a chair!

The slug did NOT pass through, which I found very odd considering how close he was. I didn't skin him out so I never did recover the lead.

The gun is a Remington LT-20 semi auto with a Bushnell 3x9 40mm scope.
It shoots 2" groups at 50 yards, set at 1" highand 6"-7" groups at 100.