Date: 28/11/2015 1:31

BBs (steel and lead): Best selection online

Although all steel BBs state .177 caliber/4.5mm, in reality they are not and never have been. They are more like 4.35mm in diameter (0.171 to 0.173-inches) these days. They were larger in the past, and if you want to learn more about them read this report.