It's multiple choice, right?

...by that much.

It would take 10 lead spheres that diameter to make a pound of lead.

14 gauge, 14 to make a pound.

.410 - - > diameter in inches.

10 lead balls, the diameter of the barrel, which would weigh a pound, makes it a 10 gauge.
Thus a 20 gauge barrel would be half the diameter of a 10 gauge barrel.

And yes, the .410 is the only shotgun (as far as I know) that is measured in caliber.
I have no idea why.

I'm not a gun nut, although I do own a couple.

10 gauge would leave a scar, but 20 gauge not so much.

The larger the gauge the smaller the needle?
hunh

Insulin syringe needles are usually 26 or 27 gauge.

For major oral surgery, before inserting an anesthesia tube through the nostril into the lung, they inject the throat with a med to relax the muscles. When that one comes at you, i swear it looks like the barrel of a .45 (and the fourth or fifth time isn't any easier than the first)!

I've never seen one in decimals but that doesn't mean much.

So are piercings. That's why a 0 is a very big piercing and a 4 is a hole 1/4 the size. The needles used to normally pierce ears are around a 10.

For that matter so are screws but that adds another degree of complexity to the conversation.

It is measuring to the hundredth of an inch.

My bad.