by B.B. Pelletier
This report was requested by blog reader Wulfraed in one of his comments.
For the benefit of those who shoot airsoft guns, the BB I am addressing today is the steel BB that historical BB guns shoot — not the 6mm plastic ball that Asian-made airsoft guns started using in the 1970s.
The first BB used in an air rifle was BB-sized lead shot used by shotgunners. In the day when it was popular (the 1880s), shot was sold in bags in hardware stores and came in various numerical and letter sizes, including sizes B, BB and BBB. BB shot was supposed to be 0.180 inches in diameter and weigh more than nine grains.
At the turn of the 20th century, Daisy reduced the size of what they always called air rifle shot to a lead ball 0.175 inches in diameter. That saved them lead and also went faster because it was a lighter ball.