taught discipline of barrel control
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Agreed. Barrel control at all times. This is why young people need to be taught at an early age. By the time they have “been in the field” toting an empty gun a few years, they will have adapted to the unconscious “safe” carrying of a firearm. Expecting people to learn safe gun handling out of a book is ridiculous. You don’t learn to play the piano out of a book. Safe gun handling comes with practice, just like knowing where f sharp is on a keyboard.
Walk away time.