The pricing is based on 100 bullets. This heel bullet is meant specifically for the 310 Martini Cadet cartridge. The nominal weight is 125 gr and the driving band diameter is 0.324″. This bullet is not sized is shipped without lubricant. After loading, Lee liquid alox can be applied (painted on) and allowed to dry, this is the best way to lube the bullets. Shipping weight is 820 g/100 bullets.