What Material Should My Gun Case be Made Of?

Is there a material that can be considered best for gun cases? Your guess is as good as mine. Gun cases are made from different materials like leather, wood, plastic, aluminum etc. Which of these materials offers the best protection?

Source: http://www.articlesbase.com/outdoor-sports-articles/what-material-should-my-gun-case-be-made-of-5070734.html

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