Shop › HRNDY 300BLK 190GR SUB-X 20/200 HRNDY 300BLK 190GR SUB-X 20/200 $43.95 Hornady Subsonic, 300 Blackout, 190 Grain, Sub-X, 20 Round Box 80877 Quantity: Add To Cart Added! Hornady Subsonic, 300 Blackout, 190 Grain, Sub-X, 20 Round Box 80877