Defensive Shotgun Patterning

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For those of you with HD shotguns

Good info on shotgun spread from ~18" length shotgun barrels.
1" per yard rule of thumb debunked for most chokes.
http://rifleshooter.com/2013/01/defensi ... yard-myth/
While the barrel we had back bored 2″ short from the muzzle fit the 1″ per yard tale, it should be noted that we intentionally back bored it short as part of our testing protocol from another article. When examining stock barrels, the spread was approximately half of the anecdotal 1″ per yard spread.
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