hanshi
Cannon
My smoothbore (flint) has an untapered barrel and a rear sight; I shoot it as if it were a rifle. It is a 20ga, and since it is fired mostly round ball, the barrel is perfect for my needs. It does work fine with shot, too. The gun isn't heavy and handles nicely; I much prefer shooting a 325 grain ball rather than a 500 grain ball. There is a point where enough is enough - not talking shot, just lead ball - and any more is simply not needed. But then I don't wing shoot and squirrels/turkey/rabbit is all I will chase with shot. So if you want to primarily use shot, then go with a bigger bore, 16 or 12. But if you're like me and use it as a deer collector, a 20 is probably the biggest that one should consider or maybe a 24 ga or 28 ga.