F Sellier & Bellot SB300BLKA Rifle 300 Blackout 124 gr Full Metal Jacket 20 Per Box/ 50 Case 500 Rounds $354.99 SB300BLKA - $12- $18 Per Item BH Ammo F Sellier & Bellot SB300BLKA Rifle 300 Blackout 124 gr Full Metal Jacket 20 Per Box/ 50 Case 1000 Rounds $704.99 SB300BLKA - $12- $18 Per Item BH Ammo