4 bore, 8 bore, 10 bore, the most common, the 12 bore, 16 bore, 20 bore, 24 bore, 28 bore, and the .410. Any others? Smooth bores only.

What were the original purposes of the different bores? Any historical special ones and purposes? Any special purposes you personally have?

The 12 bore is the main versatile choice. A bit of everything

Here I've aways seen the 16 bore as popular in continental Europe, and their descendents around the world.

And Ithe 410 as a choice for a child and newbies.

Thelargest bores used for punt waterfowl shooting.

what are your thoughts?