Grandpa used to tell me that buckshot spreads 1″ for every yard from gun. I took him for his word, but suspected he was wrong after patterning my 870 and 930 shotguns. I chalked my results up to long barrels and modern technology, never putting the assertion to a comprehensive test.
RifleShooter, however, was not content with the same assumptions. Instead, they comprehensively tested patterns with 18″ barrels and various chokes, including a back-bored barrel almost the the muzzle. Most stock barrels were less than .5″ per yard. Only the back-bored barrel was close to the 1″ claim, coming in at .96″ per yard.
The results chart is telling:
|Barrel||7 yards||15 yards||20 yards||Avg spread per yard|
|Back Bored||2||5 ¼||7||.35”|
|Vang Comp||1 ¾||7||7 ¼||.36”|
|Remington IC||5||10 7/8||11 ½||.58”|
|Remington Cyl||3 ¼||9 1/8||12||.60”|
|Back bored 2” from muzzle||4 ¼||15 ¾||19 ¼||.96”|
Two morals to this story:
- Pattern your shotgun