Ubwino wina wa bala wa grade 303 wosapanga dzimbiri pa kalasi 303 ndikuti ndizovuta kwambiri ndipo umatsutsana bwino. Chifukwa cha izi, khola lopanda dzimbiri limagwiritsidwa ntchito kwambiri popanga zoyaka ndi zokutira monga mtedza, ma balts, ma cys, ma clips, zokhala ndi ma curtings ndi ma cy. Zogulitsa zopangidwa ndi chitsulo cha kalasi 304 mu malonda ogulitsa mwachangu nthawi zambiri amatchedwa "A2".