Airgun BBs

So how did bb guns get there name anyway? Very early bb guns used lead shot from shotgun shells. Back then there were varying shot sizes from B - BBB . The first bb guns used BB sized shot and the term has stuck ever since.

Daisy (around the year 1900) standardized the size of bb shot to 4.45 mm and today bb guns use 4.5 mm (.177 caliber) bbs.