What ammunition round is the best for home self defense?

Which ammunition round is the best for home self defense? 9mm, Birdshot, or Buckshot? We test each round with a pumpkin as the bad guy and place it in front of plywood which will represent walls in a home to help identify bullet penetration. Let us know what you think about this video and give us your opinion of what the best ammo is for home self defense?

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