I did like 12g Magnum loaded with a single steel ball bearing, myself. Slight issue of over-penetration in some cases.
However the kick was something else.
Shotguns not really my thing, though. I used one of these for Practical Pistol until UK mainland banned all pistols
JPP Imports - ET Masters
Now, launching a 4" clay over the shooter's right sholder, and taking it from the holster with a .38 Super - that was a challenge!
Happy days!
Sigh!!