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I don't shoot as well as I would like, not by, as they say, a long shot. When I go to the range, though, I go as a student of the gun. It's fun, but that's a side benefit. The point is to study the art and science of making the gun perform quickly, accurately, and safely - and I got those out of order. I should study more.

Not everyone is going to look at it that way. A shame, in my opinion, but not everyone obsesses the details. Using the words "clip" and "magazine" interchangeably doesn't indicate a safety issue, anyway. Requiring more training probably wouldn't make a long term difference among those least interested in specifics, and those that are really interested probably don't need the requirement. They will seek the skills and knowledge on their own.

when we were talking during a break, the person said, "..What's a chamber?.."

This is an easy one. The chamber is where the chamber music comes from. Mind your hearing protectors, here comes the Second movement.