Approximate BB Count In Winchester XX Magnum Shot shells 

10 Ga.- 3 l/2" 2 1/4 oz. Shot    shot size- 4 (304)
														  5 (382) 
                                            6 (495) 

12 Ga.- 3"     2 oz. Shot        shot size- 4 (270)
                                            5 (340)
                                            6 (440)
20 Ga. 3"      1 1/4 oz. Shot    shot size- 4 (169) 
                                            6 (275)
(some figures were calculated)<\p>