Flash bang shell - about the only use I can see for this is as an emergency signal device when lost in the mountains. Otherwise the flash is likely to blind the shooter.
Bolo shell - might be useful during riots, looting and TEOTWAWKI situations or if you live where you might encounter stampeding buffalo.
Piranha shell - effective only between 10 and 50 feet? I'll pass. I'll use #6 instead.
Pit Bull shell - Oh my. It's "number one rated" alright - by prosecutors for hanging you as wanting to inflict a fatal injury.
Terminator-X shell - Like the Pit Bull above, can't you see the prosecutor reading the advertising to the jury? The lethality [...] can't be advertised.. Watch the juror's faces when he says This slug mushrooms and expands to nearly 2 inches! It forces the dozen of tiny pellets to spread through your objective like a cancerous disease, opening an area [...] equal to a softball! And finally, make sure your affairs are in order when he tells the jury Only 5% of any living being could survive this kind of hit!
"Armor Piercing" shell - Notice the quotations. Any serious rifle round should be able to penetrate 1/4" plate up to 50 yards. Nothing special here except it's in a shotgun shell of dubious value.
“Pepper Blast” shell - Might be useful if you know which way the wind is blowing or have time to figure that out before using it.
Course, "250ft wall of fire" could be fun at a night shoot. 