OK...here's some cold water to throw on the fire.
If these are shorter you can stack more of them in a tube magazine; What about an 1100 or 11-87 or benelli semi auto that holds four or five 2 3/4" rounds...are we now in a condition where a centre-fire semi auto holds more than five rounds?
What does the mag limit law state?
Well, a semi-auto would definitely "hold" more than 5 rounds. Tho, after the first shot, it would jam and be relatively useless. The mini-shells don't have enough oomph to cycle the shell...


















































