It won’t, it’s been tested numerous times. Birdshot is an ineffective goblin stopper beyond direct contact.
No one said it wouldn’t wound someone.
Look at Dick Cheney’s hunting partner. Hardly effective at all.
Hexum was killed by pieces of his skull propelled into his brain from the muzzle blast. Not soemthing we are going to rely on for self defense.
Best demo of the near total ineffectiveness of birdshot:
http://www.theboxotruth.com/docs/bot17.htm
Do you know anyone who will volunteer to be shot at ten feet with number eight birdshot? I think the damage to the belly will be somewhat worse than the damage to that door.